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Academic literature on the topic 'Bi2S3'

Author: Grafiati

Published: 28 May 2022

Last updated: 7 September 2023

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Journal articles on the topic "Bi2S3"

Liang, Yuan-Chang, and Tsun-Hsuan Li. "Controllable morphology of Bi₂S₃ nanostructures formed via hydrothermal vulcanization of Bi₂O₃ thin-film layer and their photoelectrocatalytic performances." Nanotechnology Reviews 11, no. 1 (2021): 284–97. http://dx.doi.org/10.1515/ntrev-2022-0016.

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Abstract Bi2S3 nanostructures with various morphologies were synthesized through hydrothermal vulcanization at different sulfur precursor (thiourea) concentrations. A 100 nm thick sputter-deposited Bi2O3 thin-film layer on a fluorine-doped tin oxide glass substrate was used as a sacrificial template layer. The etching of the Bi2O3 sacrificial template layer and the regrowth of Bi2S3 crystallites during hydrothermal vulcanization produced the different Bi2S3 nanostructure morphologies. The lowest sulfur precursor concentration (0.01 M) induced the formation of Bi2S3 nanosheets, whereas the Bi2S3 nanoribbons and nanowires were formed with increased sulfur precursor concentrations of 0.03 and 0.1 M, respectively. These results indicate that sputter-deposited Bi2O3 thin-film layers can be effectively used to form low-dimensional Bi2S3 crystals with controllable morphologies. Among the various Bi2S3 samples, the Bi2S3 nanosheets exhibited superior photoactive ability. The higher active surface area, surface defect density, light absorption capacity, and photo-induced charge separation ability of Bi2S3 nanosheets explain their superior photoelectrocatalytic degradation ability of rhodamine B dyes.

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Danamah, Hamdan M., Siddheshwar D. Raut, Zeenat A. Shaikh, and Rajaram S. Mane. "Chemical Synthesis of Bismuth Oxide and Its Ionic Conversion to Bismuth Sulphide for Enhanced Electrochemical Supercapacitor Energy Storage Performance." Journal of The Electrochemical Society 169, no. 12 (2022): 120537. http://dx.doi.org/10.1149/1945-7111/acaac9.

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Successive ionic layer adsorption and reaction (SILAR)-based room-temperature (27 °C) chemical synthesis of bismuth oxide (Bi2O3) and its ionic conversion to bismuth sulphide (Bi2S3) has been performed and reported in the present study. A chemical conversion of the bismuth oxide to the bismuth sulphide has been confirmed using changes in the structure, phase, surface elementals , and surface area measurement studies. Both bismuth oxide and bismuth sulphide electrode materials are envisaged in electrochemical measurements wherein, the later has evidenced an enhanced electrochemical performance over the prior. The cycling stability of the Bi2S3 (91% after 2000 cycles) electrode material is also better than the Bi2O3 (87% over 2000 cycles). The as-assembled Bi2S3//Bi2S3 symmetric electrochemical supercapacitor device has adduced 75.3 Wh kg−1 and 749.8 W Kg−1energy and power densities, respectively with nearly 88.8% capacitance retention efficacy even over 2000 redox cycles measured at 10 A g−1. The commercial potential of the Bi2S3//Bi2S3 has been tested by powering the display panel “CNED” consisting nearly 42 LEDs with a full-light intensity.

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Liang, Yuan-Chang, Shao-Yu You, and Bo-Yue Chen. "Crystal Design and Photoactivity of TiO2 Nanorod Template Decorated with Nanostructured Bi2S3 Visible Light Sensitizer." International Journal of Molecular Sciences 23, no. 19 (2022): 12024. http://dx.doi.org/10.3390/ijms231912024.

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In this study, TiO2-Bi2S3 composites with various morphologies were synthesized through hydrothermal vulcanization with sputtering deposited Bi2O3 sacrificial layer method on the TiO2 nanorod templates. The morphologies of decorated Bi2S3 nanostructures on the TiO2 nanorod templates are controlled by the duration of hydrothermal vulcanization treatment. The Bi2S3 crystals in lumpy filament, nanowire, and nanorod feature were decorated on the TiO2 nanorod template after 1, 3, and 5 h hydrothermal vulcanization, respectively. Comparatively, TiO2-Bi2S3 composites with Bi2S3 nanowires exhibit the best photocurrent density, the lowest interfacial resistance value and the highest photodegradation efficiency towards Rhodamine B solution. The possible Z-scheme photoinduced charge separation mechanism and suitable morphology of Bi2S3 nanowires might account for the high photoactivity of TiO2 nanorod-Bi2S3 nanowire composites.

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Poltabtim, Worawat, Donruedee Toyen, and Kiadtisak Saenboonruang. "Theoretical Determination of High-Energy Photon Attenuation and Recommended Protective Filler Contents for Flexible and Enhanced Dimensionally Stable Wood/NR and NR Composites." Polymers 13, no. 6 (2021): 869. http://dx.doi.org/10.3390/polym13060869.

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This work aimed to theoretically determine the high-energy-photon-shielding properties of flexible wood/natural rubber (NR) and NR composites containing photon protective fillers, namely Pb, Bi2O3, or Bi2S3, using XCOM. The properties investigated were the mass attenuation coefficient (µm), linear attenuation coefficient (µ), and half value layer (HVL) of the composites, determined at varying photon energies of 0.001–5 MeV and varying filler contents of 0–1000 parts per hundred parts of rubber by weight (phr). The simulated results, which were in good agreement with previously reported experimental values (average difference was 5.3%), indicated that overall shielding properties increased with increasing filler contents but decreased with increasing incident photon energies. The results implied the potential of bismuth compounds, especially Bi2O3, to replace effective but highly toxic Pb as a safer high-energy-photon protective filler, evidenced by just a slight reduction in µm values compared with Pb fillers at the same filler content and photon energy. Furthermore, the results suggested that the addition of 20 phr wood particles, primarily aimed to enhance the rigidity and dimensional stability of Pb/NR, Bi2O3/NR, and Bi2S3/NR composites, did not greatly reduce shielding abilities; hence, they could be used as dimensional reinforcers for NR composites. Lastly, this work also reported the optimum Pb, Bi2O3, or Bi2S3 contents in NR and wood/NR composites at photon energies of 0.1, 0.5, 1, and 5 MeV, with 316–624 phr of filler being the recommended contents, of which the values depended on filler type and photon energy of interest.

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Choi, Yong Chan, and Eunjeong Hwang. "Controlled Growth of BiSI Nanorod-Based Films through a Two-Step Solution Process for Solar Cell Applications." Nanomaterials 9, no. 12 (2019): 1650. http://dx.doi.org/10.3390/nano9121650.

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Pb-based hybrid perovskite solar cells, despite their advantages, face challenges in commercialization. In recent years, Bi-based chalcohalides are being considered as potential alternative candidates, however, their current device efficiency remains unsatisfactory. Herein, a two-step solution method is developed and applied to the fabrication of BiSI films. The method consists of the formation of Bi2S3 (step I) and its conversion to BiSI (step II). The Bi2S3 was fabricated by a thiol-amine solution process and the BiSI conversion was achieved by chemical reaction between the as-formed Bi2S3 and BiI3. It was found that the formation of BiSI was highly dependent on the Bi:S molar ratio of the Bi2O3-thiourea solution and the number of times of step I. The as-fabricated BiSI film had an optical band gap of 1.61 eV and exhibited nanorod morphology. In addition, the electronic structure is explored and discussed for solar cells applications.

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Dzhafarov, Ya I., A. M. Mirzoeva, and M. B. Babanly. "Reciprocal system 3Tl2S + Bi2Se3 ↔ 3Tl2Se + Bi2S3." Russian Journal of Inorganic Chemistry 51, no. 5 (2006): 805–9. http://dx.doi.org/10.1134/s0036023606050202.

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da Silva, Estelina Lora, Mario C. Santos, Plácida Rodríguez-Hernández, Alfonso Muñoz, and Francisco Javier Manjón. "Theoretical Study of Pressure-Induced Phase Transitions in Sb2S3, Bi2S3, and Sb2Se3." Crystals 13, no. 3 (2023): 498. http://dx.doi.org/10.3390/cryst13030498.

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We report an ab initio study of Sb2S3, Sb2Se3, and Bi2S3 sesquichalcogenides at hydrostatic pressures of up to 60 GPa. We explore the possibility that the C2/m, C2/c, the disordered Im-3m, and the I4/mmm phases observed in sesquichalcogenides with heavier cations, viz. Bi2Se3, Bi2Te3, and Sb2Te3, could also be formed in Sb2S3, Sb2Se3, and Bi2S3, as suggested from recent experiments. Our calculations show that the C2/c phase is not energetically favorable in any of the three compounds, up to 60 GPa. The C2/m system is also unfavorable for Sb2S3 and Bi2S3; however, it is energetically favorable with respect to the Pnma phase of Sb2Se3 above 10 GPa. Finally, the I4/mmm and the disordered body-centered cubic-type Im-3m structures are competitive in energy and are energetically more stable than the C2/m phase at pressures beyond 30 GPa. The dynamical stabilities of the Pnma, Im-3m, C2/m, and I4/mmm structural phases at high pressures are discussed for the three compounds.

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Yuan, Xiaoya, Xue Wu, Zijuan Feng, Wen Jia, Xuxu Zheng, and Chuanqiang Li. "Facile Synthesis of Heterojunctioned ZnO/Bi2S3 Nanocomposites for Enhanced Photocatalytic Reduction of Aqueous Cr(VI) under Visible-Light Irradiation." Catalysts 9, no. 7 (2019): 624. http://dx.doi.org/10.3390/catal9070624.

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Heterojunctioned ZnO/Bi2S3 nanocomposites were prepared via a facile solvothermal method. The obtained photocatalysts were characterized by X-ray powder diffraction (XRD), Scanning electron microscopy (SEM), High resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), UV-Vis diffuse reflectance spectroscopy (DRS), and Photoelectrochemical and Photoluminescence spectroscopy (PL), respectively. The results showed that ZnO/Bi2S3 composites exhibited the sandwiched-like structure, where ZnO nanoparticles were randomly embedded between Bi2S3 nanoflakes. The performance of photocatalytic Cr(VI) reduction under visible light indicated that ZnO/Bi2S3 composites exhibited high-efficiency photocatalytic activity in comparison with either Bi2S3 or ZnO. The 5%-ZnO/Bi2S3 photocatalyst removed 96% of Cr(VI) within 120 min at 20 mg/L initial concentration of Cr(VI). The enhanced performance of ZnO/Bi2S3 photocatalysts could be ascribed to the increased light harvesting and the effective separation and transfer of the photogenerated charge carriers across the heterojunction interface of the ZnO/Bi2S3 composite. This work could pave the way for the design of new hetero-structured materials and has great potential in environmental remediation.

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Ren, LiZhen, DongEn Zhang, Xiao Yun Hao, et al. "Synthesis and photocatalytic performance of Bi2S3/SnS2 heterojunction." Functional Materials Letters 10, no. 02 (2017): 1750004. http://dx.doi.org/10.1142/s1793604717500047.

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Bi2S3/SnS2 heterostructured photocatalysts were synthesized from BiOI, SnCl[Formula: see text]5H2O and NH2CSNH2 using an economic and simple hydrothermal method. The as-synthesized samples were characterized by X-ray diffraction, scanning electron microscopy and ultraviolet-visible diffuse reflectance spectroscopy. The photodegradation activities of the Bi2S3/SnS2 heterostructured photocatalysts were estimated by degrading rhodamine B under simulated sunlight supplied by irradiating with a 350[Formula: see text]W Xe lamp. Bi2S3/SnS2 photocatalysts were prepared using varying percentages of Bi2S3. The sample containing 13% Bi2S3 had the most efficient photocatalyst performance among the tested samples. The photocatalytic mechanism involves heterojunctions formed in the Bi2S3/SnS2, which promoted effective separation of photoinduced electrons and holes.

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Fenelon, Ernso, Achmad Chusnun Ni’am, Ya-Fen Wang, and Sheng-Jie You. "Study of the Potential of La/Bi2S3 Catalyst for Photodegradation of Acid Yellow 42 Dye under Visible Light." Journal of Nanomaterials 2022 (October 6, 2022): 1–13. http://dx.doi.org/10.1155/2022/2990466.

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The new catalyst (La/Bi2S3) applies for the photodegradation of Acid Yellow 42 (AY42) dye under visible light in this study. The La/Bi2S3 material is the motivating catalyst due to the excellent ability of Lanthanum (La) to increase the adsorption capacity and electron-hole separation of Bi2S3 for enhancing the degradation of AY42. The characterization analysis of the prepared material confirms a successful synthesis using the hydrothermal method. The efficiency of photodegradation AY42 using La/Bi2S3 is higher than pure Bi2S3. La on Bi2S3 (doped at 3%), which is devised on adsorption (40.24%) and photodegradation (51.86%), has the best degradation efficiency (92.1%). The trapping experiment and the analysis of electron spin resonance (ESR) spectra explain that the hydroxyl radical is the most active species in this photocatalytic process due to the total degradation efficiency decreasing from 92.1% to 57.16% by the scavenger using isopropyl alcohol (IPA). The hole (h+) shows its importance in the photodegradation of AY42 by detecting that OH- is the intermediate species. The new material (La/Bi2S3) also shows excellent photostability in the reusability test. Finally, the result confirms that La is a suitable doping metal for Bi2S3 and is interesting for practical application under visible light. The new catalyst (La/Bi2S3) applies for the photodegradation of Acid Yellow 42 (AY42) dye under visible light in this study. The La/Bi2S3 material is the motivating catalyst due to the excellent ability of Lanthanum (La) to increase the adsorption capacity and electron-hole separation of Bi2S3 for enhancing the degradation of AY42. The characterization analysis of the prepared material confirms a successful synthesis using the hydrothermal method. The photodegradation efficiency of AY42 using La/Bi2S3is higher than pure Bi2S3. The doping of 3% weight of La on Bi2S3 shows the optimum degradation efficiency of 92.1%, devised on adsorption (40.24%) and photodegradation (51.86%). The pure Bi2S3 (46.7%) contains 17.1% of adsorption and 29.6% of photodegradation. The trapping experiment and the analysis of electron spin resonance (ESR) spectra explain that the hydroxyl radical is the most active species in this photocatalytic process due to the total degradation efficiency decreasing from 92.1% to 57.16% by the scavenger using isopropyl alcohol (IPA). The hole (h+) shows its importance in the photodegradation of AY42 by detecting that OH- is the intermediate species. The new material (La/Bi2S3) also shows excellent photostability in the reusability test. Finally, the result confirms that La is a suitable doping metal for Bi2S3 and is interesting for practical application under visible light.

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Dissertations / Theses on the topic "Bi2S3"

Доброжан, Олександр Анатолійович, Александр Анатольевич Доброжан, Oleksandr Anatoliiovych Dobrozhan, et al. "Thermoelectric properties of the colloidal Bi2S3-based nanocomposites." Thesis, Jadavpur University, 2017. http://essuir.sumdu.edu.ua/handle/123456789/65347.

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In this work we present the proof of the concept of the novel strategy to improve the thermoelectric properties of Bi2S3based nanostructured bulk materials by blending the metallic nanoinclustions with the semiconductor nanoparticles forming the nanocomposites (NCts). The obtained NCts were composed of Bi2S3nanorods (length - 100 nm and width – 10 nm) and Ag nanoparticles (diameter - 2- 3 nm) synthesized by colloidal method. The morpohology, phase and chemical composition, electrical conductivity and Seebeck coefficient of NCts were investigated by using transmission electron microscopy (TEM), X-ray diffraction, energy dispersive X-ray analysis (EDAX), 4-point probes method and static dc-method. This strategy is the perspective way to improve the conversion efficiency of others thermoelectric materials.

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PIRAS, ROBERTO. "Synthesis and Characterization of Bi2S3 Colloidal Nanoparticles for Photovoltaic Applications." Doctoral thesis, Università degli Studi di Cagliari, 2016. http://hdl.handle.net/11584/266676.

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Global energy consumption is expected to increase significantly together with the greenhouse gas emissions and the problem of fossil fuels exhaustion. Solar energy, as an alternative and renewable form of energy, has gained pop- ularity as possible solution for all these problems. Lots of materials have been studied to implement the energy conversion efficiency of the so-called third generation solar cells. These devices could be a cheaper alternatives to the silicon-based ones. Unfortunately, they are often characterized by short life- time or health hazardous materials. Bismuth sulfide(Bi2S3) is a promising n-type semiconductor for solar energy conversion.In this work,the properties of the compound will be discussed,as well as its potential for applications in solar energy technology.Wehave explored the colloidal synthesis of Bi2S3 nanocrystals,with the aim of employing them in the fabrication of solution- processable solar cells and to replace toxic heavy metals chalcogenides likePbS or CdS,that are currently employed in such devices. We compare different methods to obtain Bi2S3 colloidal quantum dots, including the useof environmentally benign reactants, through horganometallic synthesis. Surfactant-assisted colloidal synthesis(SACS) methods were used to synthesize Bi2S3 nanoparticles with different size and shape.These methods have been employed changing systematically several parameters such as temperature and timeofsynthesis, concentration ofchemical reagents and sulfur precursors. Morphological characteristics and optical properties of all the synthesized nanoparticles have been characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), UV-Vis and photoluminescence (PL) spectroscopy. After the characterization of electrical properties of bismuth sulfide sam- ples together with the preliminary attempts to find the most advantageous methods for the production of homogeneous film on conductive supports, asample was chosen like standard and it was employed in building of various prototype of third generation solution processed solar cells. Dip and spin coat- ing techniques were employed to produce homogeneous film of nanoparticleson conductive support, also in combination with organic polymer such P3HT, Pedot:PSS and Spiro-OMeTAD. The resulting solar cells were tested for power conversion efficiency (PCE). Synthesis and characterizations have been carried out in Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, under the supervision of Prof. Anna Musinu and Prof. Carla Cannas. Optoelectronic characterizations and solar cells manufacturing have been carried out in Di- partimento di Fisica, Università degli Studi di Cagliari, under the supervision of Prof. Michele Saba, Prof. Andrea Mura and Prof. Giovanni Bongiovanni.

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Wetzel, Duston. "ROOM TEMPERATURE MAGNETORESISTANCE IN LARGE AREA Co/Bi2Se3 BILAYERS." OpenSIUC, 2021. https://opensiuc.lib.siu.edu/theses/2841.

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The area of spintronics has witnessed tremendous progress in the 21st century. During the 1980s and 1990s, the Giant and Tunnel Magnetoresistance effect dominated spintronics research with room-temperature ferromagnets(FM), metals, and insulators. Since then, the observation of several spin-based phenomena in heavy non-magnetic materials such as the Spin Hall Effects and the discovery of topological insulators have broadened the scope of spintronics research. Strong spin-orbit coupling (SOC) in topological insulators is expected to induce strong spin-orbit torques on proximal magnetic moments. This has motivated much recent interest in FM/TI systems with applications in spintronic memory and sensing. In this work, magnetron sputtered large-area Co/Bi2Se3 thin films were investigated with a custom-built magnetotransport setup. When current is passed predominantly through the Co layer we observe typical Co anisotropic magnetoresistance, but by promoting higher current density through the interface, we observe unidirectional magnetoresistance with a much larger change in resistance than Co alone. We also observe an unusual inverse current dependence. To test the contributions of each constituent material, Co/Ta and Cr/Bi2Se3 were prepared as controls, and similar observations were made in both materials, but not Co/Cr, suggesting that high SOC in the overlayer may be the driving force. While a proper understanding of our magnetoresistance data is not available at this point, the results broadly highlight the exciting prospects of observing novel phenomena in bilayer spintronic systems at room temperature.

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Sevriuk, Vasilii [Verfasser]. "Scanning tunneling microscopy study of Bi2Se3(0001) and of FeSe and Bi nanostructures on Bi2Se3(0001) / Vasilii Sevriuk." Halle, 2017. http://d-nb.info/1141177986/34.

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Laurent, Kévin. "Etude expérimentale de la microstructure et des propriétés électriques et optiques de couches minces et de nanofils d'oxydes métalliques (d-Bi2O3 et ZnO) synthétisés par voie électrochimique." Phd thesis, Université Paris-Est, 2008. http://tel.archives-ouvertes.fr/tel-00470542.

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L'intérêt porté sur la miniaturisation des systèmes par la communauté scientifique est grand, que ce soit pour des raisons de mobilité, d'économie d'énergie ou d'innovation technologique. L'objectif de cette thèse est de déterminer les caractéristiques physiques et structurales des couches minces et des nanofils d'oxydes métalliques synthétisés par la méthode électrochimique. La première partie de cette thèse est consacrée à l'oxyde de bismuth en phase delta. Les couches minces élaborés par électrochimie sont de très bonne qualité cristalline, et seul la phase delta- Bi2O3 est présente. Le caractère nano structuré des couches minces est mis en évidence par les expériences de microscopie électronique en transmission (MET) et participe à la stabilisation de cette phase à température ambiante. Les mesures de conductivité réalisées par spectroscopie d'impédance complexe montrent un comportement différent selon la nature du substrat utilisé. Nous observons une excellente conductivité électrique des dépôts réalisés sur les substrats en argent doré (4*10-3 S*cm-1), alors que les dépôts obtenus sur l'inox montre un comportement très résistif (10-7 S*cm-1). La seconde partie de cette étude concerne l'oxyde de zinc. Les conditions d'élaboration par électrochimie influence les propriétés structurales et physiques des couches minces obtenues. Les différents traitements thermiques réalisés sur les couches minces de ZnO ont permis d'améliorer la qualité optique des couches et de modifier la structure du ZnO par incorporation d'azote lors de recuit dans l'ammoniaque. La dernière partie est consacrée à la synthèse et à la caractérisation de nanofils de ZnO élaborés par la méthode " template ". Cette méthode nous a permis de confiner la croissance par électrochimie dans des pores de différents diamètres. Les observations réalisés par MET et MET en Haute Résolution montrent que les nanofils obtenus sont monocristallins et de bonne qualité. Les propriétés d'émission observées en PL sont très proches des propriétés d'émission des couches minces

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MATOS, Lucyene Nascimento. "Estudo de fases cristalinas no sistema Bi2O3-Tb4O7." Universidade Federal de Goiás, 2009. http://repositorio.bc.ufg.br/tede/handle/tde/821.

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Made available in DSpace on 2014-07-29T15:07:11Z (GMT). No. of bitstreams: 1 Dissertacao Lucyene Quimica.pdf: 715050 bytes, checksum: f0341d52acc4a9b488b447ca69a136f7 (MD5) Previous issue date: 2009-08-25
A systematic study concerning the crystalline phases in the Bi2O3-rich region of the system Bi2O3-Tb4O7 was made. X-ray powder diffraction method, differential thermal analysis (DTA) and differential scanning calorimetry (DSC) were used in the study of the obtained crystalline phases. Sixteen samples with composition in the range of 4.21 to 33.33 mol% of Tb4O7 were synthesized at 800oC by solid state reaction synthesis. Three distinct crystalline phases were initially identified: a tetragonal phase in the composition range of 4.21 to 5.69 mol% of Tb4O7, a cubic phase for compositions between 6.12 and 29.03 mol% of Tb4O7, and a monoclinic one with 33.33 mol% of Tb4O7. The thermal stability of these compositions was rigorously investigated and the results shown that they are metastable phases in almost all studied range. Under thermal annealing at 500oC, tetragonal phase undergoes decomposition into two phases, monoclinic and rhombohedral ones. The cubic phase, under the same thermal annealing, decomposes partially into a rhombohedral one, except for the interval between 25.0 and 29.1 mol% of Tb4O7. In this case, there was not decomposition under thermal annealing at 500oC during 373 hours, suggesting the cubic phase is stable in this composition range. The monoclinic phase was also tested concerning its thermal stability, but no phase transition was verified. The existence of a possible composition range in the system Bi2O3-Tb4O7 with stable cubic -Bi2O3 type structure is a new and promise result, because of the high ionic conductivity presented by this phase
Um estudo sistemático das fases cristalinas na região mais rica em óxido de bismuto no sistema Bi2O3-Tb4O7 foi realizado. As técnicas de Difração de Raios X pelo método do pó, Análise Térmica Diferencial (DTA) e Calorimetria Diferencial de Varredura (DSC) foram utilizadas no estudo das fases cristalinas obtidas. Dezesseis amostras com composição entre 4,21 e 33,33 mol% de Tb4O7 foram preparadas através de síntese por reação no estado sólido a 800oC. Três fases cristalinas distintas foram inicialmente identificadas: uma tetragonal, presente nas composições entre 4,21 e 5,69 mol% de Tb4O7, uma cúbica, para as composições entre 6,12 e 29,03 mol% de Tb4O7 e uma monoclínica com composição de 33,33 mol% de Tb4O7. Essas composições foram rigorosamente testadas quanto à sua estabilidade térmicas e os resultados indicaram que elas são metaestáveis em quase todo o intervalo investigado. Sob tratamento térmico a 500oC, a fase tetragonal se decompôs em duas fases, uma romboédrica e outra monoclínica. A fase cúbica, sob o mesmo tratamento térmico, se decompôs parcialmente em uma fase romboédrica, exceto para o intervalo compreendido entre 25,0 e 29,1 mol% de Tb4O7. Neste caso não houve decomposição sob tratamento térmico a 500oC durante 373 horas, indicando que a fase cúbica é estável neste intervalo de composição. A fase monoclínica também foi testada quanto à sua estabilidade, não tendo sido verificada nenhuma transição estrutural. A existência de uma possível faixa de composição no sistema Bi2O3-Tb4O7 com estrutura cúbica do tipo -Bi2O3 estável é um resultado inédito e promissor devido ela apresentar elevada condutividade iônica

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Gao, Yibin. "Thermoelectric Properties of Bi2Se3 and Copper-Nickel Alloy." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1420629394.

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Nowka, Christian. "Untersuchungen zu Gasphasentransporten in quasibinären Systemen von Bi2Se3 mit Bi2Te3, Sb2Se3, MnSe und FeSe zur Erzeugung von Nanokristallen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-216927.

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In Topologischen Isolatoren (TI) werden metallische Zustände an der Oberfläche beobachtet, während die entsprechenden Volumenzustände eine Bandlücke aufweisen. Der Volumenbeitrag zur Leitfähigkeit von TI-Materialien macht eine Synthese von Nanokristallen bzw. eine Dotierung nötig. Der Fokus der Untersuchungen dieser Arbeit liegt dabei auf der Erzeugung von Nanokristallen der TI-Materialien Bi2Te3- und Bi2Te2Se sowie dotierter Bi2Se3-Nanokristallen. Die Synthese der Nanokristalle erfolgte durch den Gasphasentransport im geschlossenen System über den Mechanismus einer Zersetzungssublimation bzw. unter dem Einsatz eines Transportmittels. Für eine erfolgreiche Erzeugung der Nanokristalle sind im Vorfeld thermodynamische Modellierungen des Gasphasentransports sowie Versuche zum chemischen Transport für die quasibinären Systeme Bi2Se3-Bi2Te3, Bi2Se3-Sb2Se3 und Bi2Se3-FeSe sowie für das ternäre System Mn-Bi-Se durchgeführt worden. Durch Versuche zum chemischen Transport konnten die Aussagen der Modellierung bestätigt und im Weiteren der Dotandengehalt in den abgeschiedenen Kristallen sowie der Einlagerungsmechanismus durch Ergebnisse aus XRD- und ICP-OES-Untersuchungen beschrieben werden. Die Synthese bzw. Dotierung der Nanokristalle wurde hauptsächlich durch die Transportrate und den Dampfdruck des Dotanden bestimmt. In den Systemen Bi2Se3-Bi2Te3 und Bi2Se3-Sb2Se3 ist ein Gasphasentransport über eine Zersetzungssublimation durchführbar und resultierte in einer erfolgreichen Darstellung von Bi2Te3- und Bi2Te2Se-Nanokristallen sowie von dotierten (SbxBi1-x)2Se3-Nanokristallen. Entgegen dessen erfolgte der Gasphasentransport in den Systemen Bi2Se3-FeSe und Mn-Bi-Se unter Verwendung eines Transportmittels. Hierbei verringerten die gesteigerten Transportraten das Wachtum von Nanokristallen. Im Weiteren gelang es dotierte (Fe,Mn)xBi2-xSe3-Volumenkristalle sowie MnBi2Se4-Einkristalle darzustellen und mittels XRD, ICP-OES, magnetischer Messungen sowie elektrischem Transport zu charakterisieren.

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Silva, Fernanda Garcia e. [UNESP]. "Estudo do efeito de CdO e Bi2O3 no processo de nucleação e crescimento de cristais em matrizes vítreas [TeO2WO3] (CdO;Bi2O3)." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/91980.

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Apresentamos os resultados de estudos de cristalização de possíveis crescimentos de cristais semicondutores de óxido de telúrio (CdTe) e óxido de bismuto (Bi2O3) no sistema de vidro 20WO3-80TeO2 (TW). Estes trabalho configura-se como um estagio anterior aos estudos de crescimentos de semicondutores em dimensões nanométricas(nanocristais “NCs”) em vidros teluritos. Com este objetivo foi sintetizada a amostra: dopadas com óxido de cadmio e óxido de bismuto, em diversas proporções em suas composições, e estas foram submetidas ou não a ambientes redutores. As amostras foram tratadas termicamente a diferentes temperaturas na região de transição vítrea (Tg ~ 350° C) e analisados utilizando as técnicas de DRX, DSC, FTIR e UV-Vis. Resultados de DRX mostram que acima do recozimento 400°C estimulou o crescimento de trigonal bipiramidal-estruturas conhecidas como α-TeO2 em ambas as amostras, e para as amostras TW dopadas com óxido de bismuto, o tratamento térmico induz a formação de cristais semicondutores de óxido de bismuto. Espectroscopia no infravermelho também mostrou a presença de estruturas Bi2O3. Absorção óptica UV-Vis indica que a presença de cádmio e bismuto em vidro TW sem serem submetidos a tratamento térmico não muda os valores de gap óptico, sendo que este corresponde a uma energia de ~2,8 eV
The present work shows the studies of possible crystallization growth of crystals oxide semiconductors of tellurium (CdTe) and bismuth oxide (Bi2O3) in the glass system 20WO3- 80TeO2 (TW). This work consists in the first steps of initial growth of semiconductors in nanometrics dimensions (nanocrystals “NCs”) in glasses teluritos. The sample was synthecized: doped with oxide of cadmium and bismuth oxide, in diverse ratios of its compositions, and these had been submitted or not it reducing enviroments. The samples had been thermally dealt with the different temperatures in the region glass transition (Tg ~ 350° C) and analyzed using the techniques of DRX, DSC, FTIR and UV-Vis. Results of DRX showed that up to the annealing 400°C it stimulated the trigonal growth known bipiramidal-structures as α-TeO2 in both the samples, and for samples TW (B), the thermal treatment induced the crystal formation bismuth oxide semiconductors. Spectroscopy in the infra-red ray also showed the presence of Bi2O3 structures in samples TW (B). Optic absorption UV-Vis indicated that the presence of cadmium and bismuth in glass TW without being submitted not dumb the thermal treatment the values of optic gap, being that this corresponds to an energy of ~2,8 eV

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Silva, Fernanda Garcia e. "Estudo do efeito de CdO e Bi2O3 no processo de nucleação e crescimento de cristais em matrizes vítreas [TeO2WO3] (CdO;Bi2O3) /." Ilha Solteira, 2012. http://hdl.handle.net/11449/91980.

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Orientador: Keizo Yukimitu
Banca: Ezequiel Costa Siqueira
Banca: Américo Sheitiro Tabata
Resumo: Apresentamos os resultados de estudos de cristalização de possíveis crescimentos de cristais semicondutores de óxido de telúrio (CdTe) e óxido de bismuto (Bi2O3) no sistema de vidro 20WO3-80TeO2 (TW). Estes trabalho configura-se como um estagio anterior aos estudos de crescimentos de semicondutores em dimensões nanométricas(nanocristais "NCs") em vidros teluritos. Com este objetivo foi sintetizada a amostra: dopadas com óxido de cadmio e óxido de bismuto, em diversas proporções em suas composições, e estas foram submetidas ou não a ambientes redutores. As amostras foram tratadas termicamente a diferentes temperaturas na região de transição vítrea (Tg ~ 350° C) e analisados utilizando as técnicas de DRX, DSC, FTIR e UV-Vis. Resultados de DRX mostram que acima do recozimento 400°C estimulou o crescimento de trigonal bipiramidal-estruturas conhecidas como α-TeO2 em ambas as amostras, e para as amostras TW dopadas com óxido de bismuto, o tratamento térmico induz a formação de cristais semicondutores de óxido de bismuto. Espectroscopia no infravermelho também mostrou a presença de estruturas Bi2O3. Absorção óptica UV-Vis indica que a presença de cádmio e bismuto em vidro TW sem serem submetidos a tratamento térmico não muda os valores de "gap" óptico, sendo que este corresponde a uma energia de ~2,8 eV
Abstract: The present work shows the studies of possible crystallization growth of crystals oxide semiconductors of tellurium (CdTe) and bismuth oxide (Bi2O3) in the glass system 20WO3- 80TeO2 (TW). This work consists in the first steps of initial growth of semiconductors in nanometrics dimensions (nanocrystals "NCs") in glasses teluritos. The sample was synthecized: doped with oxide of cadmium and bismuth oxide, in diverse ratios of its compositions, and these had been submitted or not it reducing enviroments. The samples had been thermally dealt with the different temperatures in the region glass transition (Tg ~ 350° C) and analyzed using the techniques of DRX, DSC, FTIR and UV-Vis. Results of DRX showed that up to the annealing 400°C it stimulated the trigonal growth known bipiramidal-structures as α-TeO2 in both the samples, and for samples TW (B), the thermal treatment induced the crystal formation bismuth oxide semiconductors. Spectroscopy in the infra-red ray also showed the presence of Bi2O3 structures in samples TW (B). Optic absorption UV-Vis indicated that the presence of cadmium and bismuth in glass TW without being submitted not dumb the thermal treatment the values of optic " gap", being that this corresponds to an energy of ~2,8 eV
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Books on the topic "Bi2S3"

Ristić, Momčilo M. Fazovye diagrammy sostoi͡a︡niĭ sistem Bi2O3-MexOy: Dopolzheno na X zasedenii Otdelenii͡a︡ tekhnicheskikh nauk, 21.11.1989. g. SANU, 1991.

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Crumpton, Trevor Edward. Characterisation of new phases synthesised by incorporating S,W,Mo, Cr, and Re oxoanions into Bi2O3. University of Birmingham, 2002.

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Book chapters on the topic "Bi2S3"

Jain, M., and A. Gupta. "206 Diamagnetic susceptibility of Bi2S3." In Diamagnetic Susceptibility and Anisotropy of Inorganic and Organometallic Compounds. Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-44694-1_207.

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Tesfaye, Fiseha, and Pekka Taskinen. "Experimental Thermodynamic Study of the Equilibrium Phase Assemblage AgBi3S5-Bi2S3-S." In International Smelting Technology Symposium. John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118364765.ch26.

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Wang, Z. J., S. C. Qu, Y. Xu, et al. "Solventless Synthesis of Bi2S3 Nanowires and their Application to Solar Cells." In Advanced Materials Research. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-463-4.601.

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Villars, P., K. Cenzual, J. Daams, et al. "Sr6Al12O24∙Bi2O3." In Structure Types. Part 8: Space Groups (156) P3m1 – (148) R-3. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-70892-6_590.

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Villars, P., K. Cenzual, R. Gladyshevskii, et al. "(Bi2Sr)Sr3Fe2O10.28." In Landolt-Börnstein - Group III Condensed Matter. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-22847-6_689.

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Villars, P., K. Cenzual, J. Daams, et al. "“Bi2O3∙2WO3”." In Structure Types. Part 9: Space Groups (148) R-3 - (141) I41/amd. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-02702-4_512.

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Kung, Hsiang-Hsi. "Secondary Emission in Bi2Se3." In Springer Theses. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-89332-3_4.

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Howard, Colin. "Properties of Bi2Se3 and Bi2Te3." In Springer Theses. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-44723-0_2.

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Jain, M., and A. Gupta. "204 Diamagnetic susceptibility of Bi2O3." In Diamagnetic Susceptibility and Anisotropy of Inorganic and Organometallic Compounds. Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-44694-1_205.

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Jain, M., and A. Gupta. "207 Diamagnetic susceptibility of Bi2Se3." In Diamagnetic Susceptibility and Anisotropy of Inorganic and Organometallic Compounds. Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-44694-1_208.

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Conference papers on the topic "Bi2S3"

He, Yuhang, Yuxuan Chen, Zhen Tian, and Jianming Dai. "Quantum interference effect induced the terahertz generation in Bi2S3 film." In Frontiers in Optics. Optica Publishing Group, 2022. http://dx.doi.org/10.1364/fio.2022.jtu5a.39.

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Utilizing the two-color light to illuminate the Bi2S3 film, we have observed the terahertz (THz) radiation. We attribute the mechanism of the THz generation to the one-plus-two photon absorption quantum interference effect.

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Yu, Huan, and Junli Wang. "Bismuth Sulfide (Bi2S3) Nanorods as Efficient Photodetection Materials." In 2016 5th International Conference on Advanced Materials and Computer Science (ICAMCS 2016). Atlantis Press, 2016. http://dx.doi.org/10.2991/icamcs-16.2016.189.

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Joseph, Nikhitha, Chithra Raj, and A. Chandra Bose. "Hydrothermally synthesized Bi2S3 nanorod for supercapacitor electrode application." In DAE SOLID STATE PHYSICS SYMPOSIUM 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0017546.

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Li, Ming Yu, Yu Hui Liu, and Bo Wen Xu. "Preparation of Bi2S3 nanorod and their photocatalytic activity." In 3rd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2023), edited by Xiaotian Li and Manuel Filipe Costa. SPIE, 2023. http://dx.doi.org/10.1117/12.2690510.

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Gutierrez Lazos, Claudio Davet, Manuel Alejandro Perez Guzman, Andres Mauricio Espinoza Rivas, Jaime Santoyo Salazar, and Mauricio Ortega-Lopez. "Synthesis of Bi2S3 particles via decomposition process of thioglycolic acid." In 2011 8th International Conference on Electrical Engineering, Computing Science and Automatic Control (CCE 2011). IEEE, 2011. http://dx.doi.org/10.1109/iceee.2011.6106586.

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Bankar, Prashant K., Pallavi R. Mutadak, Dnyaneshwar S. Gavhane, Pankaj S. Kolhe, Kishor M. Sonawane, and Mahendra A. More. "Improved field electron emissionbehaviour of Ag nanoparticles supported Bi2S3 nanowires." In DAE SOLID STATE PHYSICS SYMPOSIUM 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0017255.

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Ding, Taotao, Juan Xu, Jiangnan Dai, and Changqing Chen. "High photoresponse Properties of Bi2S3 flowers assembled by one-dimensional nanorods." In Optoelectronic Devices and Integration. OSA, 2015. http://dx.doi.org/10.1364/oedi.2015.jw3a.7.

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Desale, Dipalee J., Shaheed Shaikh, Farha Siddiqui, Ravikiran Birajadar AnilGhule, and Ramphal Sharma. "Synthesis and characterization of CdS-polyelectrolyte-Bi2S3 thin film by SILAR." In SOLID STATE PHYSICS: Proceedings of the 56th DAE Solid State Physics Symposium 2011. AIP, 2012. http://dx.doi.org/10.1063/1.4710178.

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Peter, I. John, S. Dhinakaran, K. Ramachandran, and P. Nithiananthi. "Performance of TiO2/CdS/Bi2S3 heterostructure based semiconductor sensitized solar cell." In DAE SOLID STATE PHYSICS SYMPOSIUM 2018. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5113396.

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Yao, Kun, Xuelei Liang, Qing Chen, and Lianmao Peng. "Field Effect and Photoelectronic Property of Nanodevices Made from Single Bi2S3 Nanowire." In 2006 1st IEEE International Conference on Nano/Micro Engineered and Molecular Systems. IEEE, 2006. http://dx.doi.org/10.1109/nems.2006.334818.

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Reports on the topic "Bi2S3"

Ehst, D. A. Production of Ra225 precursor for Ac225/Bi213 generators. Final CRADA Report. Office of Scientific and Technical Information (OSTI), 2009. http://dx.doi.org/10.2172/967952.

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