Relevant bibliographies by topics / Tungsten trioxide (WO3)

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Tungsten trioxide (WO3)'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 September 2023

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Journal articles on the topic "Tungsten trioxide (WO3)"

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Kumari, J., and P. Mangala. "Enhanced Anticarcinogenic and Antimicrobial Response of Synthesized Tungsten Oxide Nanoparticles." Journal of Scientific Research 15, no. 1 (2023): 141–57. http://dx.doi.org/10.3329/jsr.v15i1.58211.

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In the present study, we fabricated tungsten trioxide nanoparticles (WO3 NPs) from a tungsten complex [W(C13H10NO)3] of ligand N-salicylideneaniline with tungstic acid as the precursor. Nanoparticles were synthesized using the direct thermal decomposition method. These nanoparticles were evaluated for cytotoxicity influence on human breast cancer MCF7 cell line (adenocarcinoma). The observed results suggested that WO3 can destroy 50 % of viable cells after 24 h of incubation at 37 °C. Based on these results, we concluded that WO3 nanoparticles could be a potential drug carrier candidate agains
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Daniel, M. F., B. Desbat, J. C. Lassegues, B. Gerand, and M. Figlarz. "Infrared and Raman study of WO3 tungsten trioxides and WO3, xH2O tungsten trioxide tydrates." Journal of Solid State Chemistry 67, no. 2 (1987): 235–47. http://dx.doi.org/10.1016/0022-4596(87)90359-8.

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He, Xinyi, Yi Xiong, Meng Zhao, and Wei Zeng. "Study on Structural Stability of Black Phosphorus/Bismuth Oxysulfide/Tungsten Trioxide Heterojunction Based on XRD Measurement." Journal of Physics: Conference Series 2395, no. 1 (2022): 012003. http://dx.doi.org/10.1088/1742-6596/2395/1/012003.

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Abstract X-ray diffraction is employed to characterize the black phosphorus/bismuth oxysulfide/tungsten trioxide heterojunction composites to explore the alterations in crystallite size and micro-strain. The sample is immersed in sodium sulfite and tested each week. The Scherrer formula and Williamson-Hall plots are used to explore the effect of black phosphorus on improving the stability of the bismuth oxysulfide/tungsten trioxide heterojunction. The results show that the structure of black phosphorus/bismuth oxysulfide/tungsten trioxide heterojunction has changed as follows. The value of cry
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Zhang, Zhong Jian, Cun Qi Liu, Ling Gao, Chao Xiao, and Hai Tao Yang. "Sintering of Ti-Doped Tungsten Trioxide Ceramic Targets." Advanced Materials Research 668 (March 2013): 686–90. http://dx.doi.org/10.4028/www.scientific.net/amr.668.686.

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The Titanium-doped tungsten trioxide (Ti/WO3) targets with high density was prepared by sintering in oxygen atmosphere. The density, bending strength and Vickers hardness were measured. The morphologies and microstructures were characterized by XRD and SEM. The Ti/WO3 targets were used to prepare the film by magnetron sputtering .The film was characterized by Ultraviolet spectrophotometer. The results showed that 1040°C was the best sintering temperature for making Ti/WO3 ceramic targets. The relative density of the target was up to 92.18%. The visible light transmittance of the Ti/WO3 thin fi
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Medvezhynska, Olha, and Anatoliy Omel'chuk. "(Digital Presentation) Electrochemical Reduction of Oxygen-Containing Tungsten Compounds on a Liquid Gallium Cathode in an Eutectic Melt of Calcium and Sodium Chlorides." ECS Meeting Abstracts MA2022-02, no. 54 (2022): 2044. http://dx.doi.org/10.1149/ma2022-02542044mtgabs.

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This paper presents the results of studies of electrochemical reduction of oxygen-containing tungsten compounds (WO3, CaWO4) in a molten eutectic mixture of calcium and sodium chlorides. In contrast to the known methods of direct electrochemical reduction of refractory metal oxides, it is proposed to reduce the initial oxygen-containing tungsten compounds in powder form on a liquid gallium cathode without resorting to pre-pressing and sintering operations. In the temperature range 600-1000 °C, at which the electrochemical reduction of these compounds takes place, gallium does not evaporate, do
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Alharbi, Khadijah H., Walaa Alharbi, M. A. El-Morsy, M. O. Farea, and A. A. Menazea. "Optical, Thermal, and Electrical Characterization of Polyvinyl Pyrrolidone/Carboxymethyl Cellulose Blend Scattered by Tungsten-Trioxide Nanoparticles." Polymers 15, no. 5 (2023): 1223. http://dx.doi.org/10.3390/polym15051223.

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The polymeric material polyvinyl pyrrolidine/carboxymethyl cellulose (PVP/CMC) was mixed with different quantities of tungsten-trioxide nanoparticles (WO3 NPs). The samples were created using the casting method and Pulsed Laser Ablation (PLA). The manufactured samples were analyzed by utilizing various methods. The halo peak of the PVP/CMC was located at 19.65°, confirming its semi-crystalline nature, as shown in the XRD analysis. FT-IR spectra of pure PVP/CMC composite and PVP/CMC composite incorporated with various contents of WO3 obtained a shift in band locations and change in intensity. O
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Adhikari, Sangeeta, and Debasish Sarkar. "Electrochemical Response for Spherical and Rod Shaped WO3 Nanoparticles." ISRN Nanotechnology 2013 (October 23, 2013): 1–5. http://dx.doi.org/10.1155/2013/279398.

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A rapid and new technique describes synthesis technique of spherical and rod shaped tungsten trioxide (WO3) nanoparticles with similar band gap at visible wavelength. Acid catalyzed exothermic reaction and structure directing reagent follows the formation of two different morphologies and monoclinic WO3 phase. Rod shaped WO3 nanoparticle coated ITO glass electrode exhibits high current density at identical low voltage and scan rate due to its better adherence and coating uniformity in comparison with spherical nanoparticles. WO3-ITO electrode alters to blue tungsten bronze in color at low volt
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Zhang, Ping, Jiayu Sun, Qi wang, Wei Chen, and Xiaochen Li. "Photocatalytic Performance Study of Organophosphorus-Doped Tungsten Trioxide and Composite Materials." International Journal of Chemical Engineering 2022 (August 24, 2022): 1–8. http://dx.doi.org/10.1155/2022/5040439.

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The present study successfully produced a highly effective and stable organ phosphorus-doped tungsten trioxide (P-WO3) photocatalyst by a combination of hydrothermal and postcalcination methods. The crystallites, morphologies, and optical properties of the produced WO3 and P-WO3 crystals were investigated. The results indicated that P was consistently doped into the WO3 lattice in a pentavalent-oxidation state (P5+). Additionally, charge carrier traps capable of accepting photoelectrons were created. Additionally, the optical band gap was reduced from 2.4 to 2.33 eV. The degradation of methyl
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Lin, Jin Yang, Yong Ai Zhang, Ling Jie Wang, and Tai Liang Guo. "WO3-Based Sensor Based on Hall Effect for NO2 Detection: Designed and Investigation." Advanced Materials Research 148-149 (October 2010): 1042–46. http://dx.doi.org/10.4028/www.scientific.net/amr.148-149.1042.

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Novel tungsten oxide sensors were fabricated based on Hall Effect and their NO2 gas sensing properties were examined. Tungsten trioxide was grown by vapor evaporation of metal tungsten filament in an oxygen atmosphere. A WO3 thick film was deposited on the four Au electrode to be a WO3 sensor. The sensor was tested between magnetic field in a plastic test chamber. The gas sensing experiment revealed that at the NO2 concentration of 40 ppm, a sensitivity of 3.27, a response time of 36 s, and a recovery time of 45 s were observed at room-temperature. The effect of WO3 based on Hall Effect on the
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Wu, Shizhao, Xiaofeng Lu, Hanlu Gao, et al. "Controlled synthesis of tungsten trioxide with globular clusters constructed of nanoplates by rapid breakdown anodization." Nanotechnology 33, no. 15 (2022): 155607. http://dx.doi.org/10.1088/1361-6528/ac46b7.

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Abstract Herein, electrochemical synthesis of tungsten trioxide (WO3) with globular clusters constructed of nanoplates is demonstrated. Under a breakdown anodization potential of 25 V at 50 °C, tungsten foil anode was efficiently electro-oxidized into WO3 nanoplates-aggragated globular clusters powder, rather than a thin film structure as conventional anodization occurs. The WO3 globular clusters were characterized by SEM, TEM, and XRD. Effects of electrolyte composition on the breakdown anodization of the W substrate has been discussed. It is suggested that the growth of the WO3 nanoplates is
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Dissertations / Theses on the topic "Tungsten trioxide (WO3)"

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Ostachavičiūtė, Simona. "WO3, Se-WO3 ir TiO2/WO3 fotokatalizatorių sintezė, struktūra ir aktyvumas." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2015. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20150109_130956-82196.

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Pasaulyje neslopsta susidomėjimas fotokataliziniais procesais, kuriuos siekiama pritaikyti vandens skaidymo į vandenilį ir deguonį, organinių ar neorganinių junginių nukenksminimo technologijose. Fotoelektrocheminis vandens skaidymas į elementus vertinamas kaip vienas perspektyviausių būdų, galinčių ateityje užtikrinti efektyvų atsinaujinančių energijos šaltinių panaudojimą. Kuriant fotokatalizines sistemas, nanostruktūrinis titano dioksidas (TiO2) išlieka viena tinkamiausių ir labiausiai tyrinėtų medžiagų. Tačiau titano dioksidas neaktyvus regimosios spinduliuotės srityje, todėl alternatyva T
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Angeletti, Andrea. "Electronic properties of the WO2 (001) polar surface of tungsten trioxide." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23141/.

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Tungsten trioxide WO3 shows promising perspectives in many fields of research. Surface states appear to play a fundamental role on the overall functionality of the material. Experimental evidences showed the capability to consistently obtain meta-stable polar surfaces, characterized by large amount of excess charge on the surface. In this study, we investigate the WO2 terminated polar (001) surface, by density functional theory calculations. Our data suggest a tri-dimensional nature of the excess electrons, delocalized across the entire slab, compared to the usually observed two-dimensional el
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Hoel, Anders. "Electrical Properties of Nanocrystalline WO3 for Gas Sensing Applications." Doctoral thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4051.

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Tungsten trioxide is a material with a variety of application areas. For example, the material is used within thin film technologies as electrochromic material in smart windows, as electrochemically functional material in thermal control applications or as active layer in gas sensing application. Metal-oxide semiconductor gas sensors are of significant interest to detect toxic and hazardous gases. The use of small and cheep sensors is preferable since a large number of sensors easily can be placed at different sites to monitor the concentration of different species without involving huge inves
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Favard, Alexandre. "Multicapteurs intégrés pour la détection des BTEX." Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0123/document.

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La qualité de l’air extérieur (QAE) a fait l’objet d’une législation dès 1996 avec la loi LAURE. Depuis 2008, la directive européenne 2008/50/CE a instauré des obligations de mesure et de seuils à ne pas dépasser pour certains polluants à l’échelle européenne. Selon de nombreuses données toxicologiques et épidémiologiques, la pollution de l’air est à l’origine d’insuffisances respiratoires, d’asthme, de maladies cardiovasculaires et de cancers.Les composés organiques volatils (COV) et notamment le benzène, le toluène, l’ethylbenzène et les xylènes (les composés BTEX) sont des polluants avérés
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Saadi, Lama. "Etude de l'adsorption des molécules simples sur WO3 : application à la détection des gaz." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4346/document.

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L'équipe micro-capteurs de l'IM2NP développe des capteursde gaz dont le principe de détection est basé sur la mesure de la variationde la conductance en présence de gaz. Le matériau utilisé comme élémentsensible est l'oxyde de tungstène (WO3) en couches minces. L'objet de cettethèse est donc d'étudier la surface de WO3 dans sa reconstruction c(2x2),obtenue par clivage selon la direction [001]. Cette étude a été également suivied'une étude des lacunes par des calculs ab initio basés sur la DFT, dans lesdeux approximations LDA et GGA. Ensuite, l'dsorption de molécules de gazsimples (O3, COx, NOx
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Koutiri, Issam. "Etude ab initio du trioxyde de tungstène WO3 en volume et en surface." Phd thesis, Université de Bourgogne, 2012. http://tel.archives-ouvertes.fr/tel-00866593.

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Nous avons étudié par calcul ab initio la structure et la stabilité de différentes phases cristallographiques du trioxyde de tungstène en volume et ensurface, ainsi que l'effet du dopage par le potassium. L'étude a été motivéepar des travaux expérimentaux sur la croissance de nano-bâtonnets WO3 surun substrat de mica ; ces nanostructures adoptent la phase hexagonale, mé-tastable dans le WO3 massif. La première partie du manuscrit est consacrée àl'étude du volume. Les structures atomiques des phases hexagonales et monocliniquessont déterminées et comparées aux différents modèles proposés dansla
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Ramzan, Mohammed. "Characterization of electroceramics using impedance spectroscopy : photochromic tungsten trioxide (WO₃₋x) materials for sensor applications." Thesis, University of Leeds, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400156.

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Hoel, Anders. "Electrical Properties of Nanocrystalline WO3 for Gas Sensing Applications." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4051.

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Tzu-ChiehChou and 周子傑. "Fabrication of Tungsten Trioxide (WO3) Based Gas Sensors." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/7nx897.

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ChengLee and 李晟. "Fabrication of Tungsten Trioxide (WO3) Based Gas Sensors with Metal Nanoparticles." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/de29nk.

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Book chapters on the topic "Tungsten trioxide (WO3)"

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Gupta, Jyoti, Prachi Singhal, and Sunita Rattan. "Chitosan/Nanographiteplatlets (NGP)/Tungsten Trioxide (WO3) Nanocomposites for Visible Light Driven Photocatalytic Applications." In Springer Proceedings in Physics. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8625-5_3.

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Dubey, Priyanka, Sadanand, Shambhavi Rai, B. K. Pandey, and D. K. Dwivedi. "Simulation Engineering of Heterojunction Colloidal Quantum Dot- Solar Cell Using Tungsten Trioxide (WO3) as an Electron Transport Layer." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2631-0_20.

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Hatel, Rhizlane, and Mimouna Baitoul. "Synthesis of WO3 Nanostructures and Their Nanocomposites with Graphene Derivatives via Novel Chemical Approach." In Nanomechanics [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.95862.

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Trioxide Tungsten (WO3), an n-type semiconductor that exhibits a wide band gap of 2.5 to 3.6 eV, has attracted special attention from the scientific community. This attraction is due to its manifold properties, which not only follow the development of technologies, but accelerate it. There are several methods to synthesize WO3 nanostructures with various morphologies. In the present study, for the first time, a novel chemical method was developed for the preparation of WO3 nanostructures by using tungsten carbide (WC) as precursor. This novel approach has many advantages such as high yields, simple methodology and easy work up. Moreover, graphene oxide coated with WO3 nanostructured is prepared via in-situ and ex-situ chemical approaches followed by subsequent thermal treatment at 500°C. The obtained samples were characterized by different techniques to confirm the transformation of WC to WO3 nanostructures and the formation of their nanocomposites with graphene derivatives.
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Conference papers on the topic "Tungsten trioxide (WO3)"

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Martinez-Juárez, J., and J. Díaz-Reyes. "A method for deposition of tungsten trioxide (WO3)." In Sixth International Conference on Advanced Optical Materials and Devices, edited by Janis Spigulis, Andris Krumins, Donats Millers, et al. SPIE, 2008. http://dx.doi.org/10.1117/12.815958.

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Hou, Changjun, Jiale Dong, Yan Xu, Danqun Huo, Yike Tang, and Jun Yang. "Preparation and Characterization of Pt/WO3 Nano-Film and Its Hydrogen-Sensing Properties." In 2008 Second International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2008. http://dx.doi.org/10.1115/micronano2008-70010.

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Tungsten trioxide is an n-type semiconductor, which has been extensively used for the development of metal oxide semiconductor gas sensors. The hydrogen gas sensing performance of platinum (Pt) catalyst activated WO3 thin films were investigated here. All of the Pt/WO3 films membranes are sensitive to hydrogen gas and the sample by sol-gel and DC reactive magnetron sputtering methods. X-ray diffraction results indicate that the tungsten trioxide is cubic crystal, and the AFM analysis shows molecular structures of the samples are tetrahedron. It means the four consecutive quadrilateral forms we
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Ernawati, Lusi, Ruri Agung Wahyuono, Inggit Kresna Maharsih, and Ade Wahyu Yusariarta. "Preparation and Characterization of Tungsten Trioxide (WO3) Particles and Their Photocatalytic Performances for Methylene Blue Degradation." In International Conference on Industrial Technology. SCITEPRESS - Science and Technology Publications, 2019. http://dx.doi.org/10.5220/0009193000050011.

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