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Journal articles on the topic 'Bismuth tungstate'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 May 2024

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1

Smilyk, Vitaliy, Sergii Fomaniyk, Gennady Kolbasov, Igor Rysetskiy, and Michael Danilov. "PHOTOELECTROCHEMICAL PROPERTIES OF FILMS BASED ON BISMUTH AND COPPER VANADATES." Ukrainian Chemistry Journal 87, no. 1 (February 19, 2021): 3–12. http://dx.doi.org/10.33609/2708-129x.87.01.2021.3-12.

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Films of bismuth and nickel tungstates were obtained by chemical and electrochemical synthesis. Bismuth tungstate was obtained by ionic layering and electrochemical deposition. Nickel tungstate (NiWO4) was obtained by combined synthesis methods: 1st - electrochemical synthesis and 2nd - combined electrochemical and thermochemical synthesis. The obtained materials have good adhesion with an optically transparent SnO2 substrate. It is shown that the mechanism of electrochemical formation of Bi2WO6 and NiWO4 films is similar to the processes of WO3 formation as a result of electroreduction of peroxide-complex compounds based on tungstate ions, which were studied in detail in. From the data of coloring kinetics the speed, efficiency and stability of electrochromic material depending on its cycling time are estimated. It is shown that tungstates can cycle for a long time with galvanostatic current change and different potentials. Comparison of electrochromic properties of nickel and bismuth tungstate films obtained by ionic stratification, electrodeposition and combined electrochemical and thermochemical methods showed that polycrystalline films have a lower color contrast compared to films obtained by electrodeposition. Using X-ray phase analysis, it was found that the structure of the obtained materials depended on the method of production. Comparison of X-ray diffraction data for chemically and electrochemically obtained Bi2WO6 showed that the films obtained by electrochemical deposition have more amorphous structure, possibly with inclusions of orthorhombic Bi2WO6 and hexagonal WO3 crystallites, while the films obtained by ionic layering have a layer of polycrystals, indicates the fine-grained obtained crystallites. The studied properties of Bi2WO6 and NiWO4 meet the requirements for electrochromic materials in terms of providing high color contrast in the visible part of the spectrum.

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2

Lu, Shi-Yu, Ya-Nan Yu, Shu-Juan Bao, and Sheng-Hui Liao. "In situ synthesis and excellent photocatalytic activity of tiny Bi decorated bismuth tungstate nanorods." RSC Advances 5, no. 104 (2015): 85500–85505. http://dx.doi.org/10.1039/c5ra15406e.

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3

Sayyed, Mohammed I., Gandham Lakshminarayana, Mustafa R. Kaçal, and Ferdi Akman. "Radiation protective characteristics of some selected tungstates." Radiochimica Acta 107, no. 4 (March 26, 2019): 349–57. http://dx.doi.org/10.1515/ract-2018-3062.

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Abstract The mass attenuation coefficients (μ/ρ) of calcium tungstate, ammonium tungsten oxide, bismuth tungsten oxide, lithium tungstate, cadmium tungstate, magnesium tungstate, strontium tungsten oxide and sodium dodecatungstophosphate hydrate were measured at 14 photon energies in the energy range of 81–1333 keV using 22Na, 54Mn, 57Co, 60Co, 133Ba and 137Cs radioactive sources. The measured μ/ρ values were compared with those obtained from WinXCOM program and the differences between the experimental and theoretical values were very small. The bismuth tungsten oxide has the highest μ/ρ among the present samples in the studied energy region. From the μ/ρ values, we calculated the half value layer, tenth value layer and mean free path, and the results showed that ammonium tungsten oxide (which has the lowest density) and bismuth tungsten oxide (which has the highest density) possess the highest and lowest values of these three parameters, respectively. Additionally, from the incident and transmitted photon intensities, we calculated the radiation protection efficiency (RPE). The bismuth tungsten oxide was found to have RPE 98.53 % at 81 keV, which has the maximum value among the present samples and this suggested that bismuth tungsten oxide is the best to be chosen as the γ radiation shielding material candidate among the selected samples.

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4

Gudim I. A., Eremin E. V., Mikhashenok N. V., and Titova V. R. "Comparison of magnetic properties of GdFe-=SUB=-3-=/SUB=-(BO-=SUB=-3-=/SUB=-)-=SUB=-4-=/SUB=-, ferroborates grown using various solvents." Physics of the Solid State 65, no. 2 (2023): 235. http://dx.doi.org/10.21883/pss.2023.02.55406.505.

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GdFe3(BO3)4, single crystals were grown from melt-solutions based on bismuth trimolybdate and lithium tungstate. Single crystals of gadolinium ferroborate from lithium-tungstate solution-melt were grown for the first time. The magnetic properties of the grown crystals are compared. It is shown that the GdFe3(BO3)4, ferroborate obtained using bismuth solution-melt trimolybdate contains impurities of Bi3+ ions (6% at.), which replace Gd3+ ions. Whereas GdFe3(BO3)4, ferroborate grown from a solution-melt based on lithium tungstate does not seem to contain such uncontrolled impurities. Keywords: crystal growth, antiferromagnets, multferroics.

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5

Campos, Nobre, Filho, Ribeiro da Silva, Costa, Santos do Nascimento, and Zamian. "High Photocatalytic Activity under Visible Light for a New Morphology of Bi2WO6 Microcrystals." Catalysts 9, no. 8 (August 5, 2019): 667. http://dx.doi.org/10.3390/catal9080667.

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In this work, a new morphology was obtained for bismuth tungstate (Bi2WO6-glyc) using a hydrothermal method with the addition of glycerol as a surfactant. In order to compare, the bismuth tungstate without glycerol as the surfactant, i.e., Bi2WO6, was synthesized. Structural characterization by XRD and Rietveld refinement confirmed the orthorhombic structure as a single phase for all samples with high crystallinity. All active modes in Raman spectroscopy for the orthorhombic phase of bismuth tungstate were confirmed in agreement with XRD analysis. N2 adsorption/desorption and size pore distribution confirmed the high surface area (85.7 m2/g) for Bi2WO6-glyc when compared with Bi2WO6 (8.5 m2/g). The optical band gap by diffuse reflectance was 2.78 eV and 2.88 eV for Bi2WO6-glyc and Bi2WO6, respectively. SEM images confirmed the different morphology for these materials, and microstructures with cheese crisp were observed for Bi2WO6-glyc (cheese crisp). On the other hand, flower-like microcrystals were confirmed for Bi2WO6 sample. The photocatalytic performance of Bi2WO6-glyc (94.2%) in the photodegradation of rhodamine B (RhB) dye solutions at 60 min was more expressive than Bi2WO6 (81.3%) and photolysis (8.2%) at 90 min.

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6

Huang, Cong, Leilei Chen, Haipu Li, Yanguang Mu, and Zhaoguang Yang. "Synthesis and application of Bi2WO6 for the photocatalytic degradation of two typical fluoroquinolones under visible light irradiation." RSC Advances 9, no. 48 (2019): 27768–79. http://dx.doi.org/10.1039/c9ra04445k.

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7

Vazhenin, V. A., A. P. Potapov, G. R. Asatryan, and M. Nikl. "Photosensitive bismuth ions in lead tungstate." Physics of the Solid State 55, no. 4 (April 2013): 803–6. http://dx.doi.org/10.1134/s1063783413040343.

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8

Sheng, Jian Guo, and Yu Di Shan. "Study on Characterization and Preparetion of Bismuth Tungstate." Advanced Materials Research 988 (July 2014): 70–74. http://dx.doi.org/10.4028/www.scientific.net/amr.988.70.

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With the solvent of ethylene glycol, it is synthetized the bismuth tungstate(BWO) catalyst with controllable morphology. By using X ray powder diffraction(XRD) and the scanning electron microscope(SEM and TEM), the products are characterized. It is found that glycerol content can affect the morphology and structure of bismuth tungstate. The result is as follows: BWO is amorphous powder, and in front of the high temperature, it is a roasting scheelite layered structure, for nano single crystal phase. After high temperature roasting, it is changed into amorphous powder, and reunion. The oxidation mechanism of BWO is that the hole conduction band position of BWO is low, the surface hydroxyl, less after inspired by ultraviolet light can effectively reduce the concentration of organic matter.

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9

Elaouni, Aicha, M. El Ouardi, A. BaQais, M. Arab, M. Saadi, and H. Ait Ahsaine. "Bismuth tungstate Bi₂WO₆: a review on structural, photophysical and photocatalytic properties." RSC Advances 13, no. 26 (2023): 17476–94. http://dx.doi.org/10.1039/d3ra01987j.

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10

Liu, Yang, Hongguang Guo, Yongli Zhang, and Weihong Tang. "Feasible oxidation of 17β-estradiol using persulfate activated by Bi2WO6/Fe3O4 under visible light irradiation." RSC Advances 6, no. 83 (2016): 79910–19. http://dx.doi.org/10.1039/c6ra18391c.

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11

Zhang, Peigen, Jian Zhang, Anjian Xie, Shikuo Li, Jiming Song, and Yuhua Shen. "Hierarchical flower-like Bi2WO6 hollow microspheres: facile synthesis and excellent catalytic performance." RSC Advances 5, no. 29 (2015): 23080–85. http://dx.doi.org/10.1039/c4ra14782k.

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12

Trital, Hiramani, Armila Rajbhandari, Rajesh Adhikari, and Soo Wohn Lee. "SYNTHESIS OF NANO MATERIALS BY MICROWAVE ASSISTED HYDROTHERMAL METHOD." Scientific World 12, no. 12 (October 6, 2015): 21–23. http://dx.doi.org/10.3126/sw.v12i12.13565.

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Bismuth tungstate nano materials have been successfully synthesized by microwave assisted hydrothermal method. Bismuth nitrate (Bi(NO3)3.5H2O) and sodium tungstate (Na2WO4.2H2O) are used as a starting material for the preparation of nano materials and solution pH was maintained to 3. The prepared material was characterized by X-ray diffraction (XRD) to study the phase state, whereas surface morphology was observed by Scanning Electron Microscopy (SEM). The surface area was determined by Brunauer-Emmett-Teller (BET) method. The results revealed that materials are crystalline in nature having crystallite size of ~ 24 nm with surface area of 6.5 m2/g. SEM image of prepared materials showed a unique discrete hierarchical morphology. The prepared material showed visible light active photocatalytic nature for the decomposition of Rhodamine B.Scientific World, Vol. 12, No. 12, September 2014, page 21-23

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13

Lis, Olga N., Sergey E. Kichanov, Denis P. Kozlenko, Nadezhda M. Belozerova, Evgeniy V. Lukin, Subramanian Balakumar, and Boris N. Savenko. "Pressure-induced structural phase transitions in bismuth tungstate Bi2WO6." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 77, no. 4 (July 22, 2021): 488–94. http://dx.doi.org/10.1107/s2052520621005175.

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The pressure-induced structural phase transitions in bismuth tungstate Bi2WO6 have been studied using neutron diffraction and Raman spectroscopy at high pressures up to 7 and 30 GPa, respectively. A rich structural polymorphism was revealed. At P ≃ 3.5 GPa a phase transition from the initial orthorhombic phase of P21 ab symmetry to an orthorhombic phase of B2cb symmetry was observed. This transition is caused by the complex spatial rotation of the WO6 octahedra. A subsequent isostructural phase transition to another orthorhombic phase of B2cb symmetry was detected at P ≃ 5.9 GPa, accompanied by changes in both the mutual rotation and tilting of the oxygen octahedra with respect to the crystal b axis. Two more pressure-induced phase transitions in Bi2WO6 at high pressures of 11.5 and 20 GPa were observed in the Raman spectra. These pressure-driven phase transitions in bismuth tungstate are accompanied by anomalies in the pressure dependences of the unit-cell parameters, bond lengths and angles, and in the vibrational modes.

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14

Bharti, Dhiraj Kumar, Sushmitha Veeralingam, and Sushmee Badhulika. "An ultra high performance, lead-free Bi₂WO₆:P(VDF-TrFE)-based triboelectric nanogenerator for self-powered sensors and smart electronic applications." Materials Horizons 9, no. 2 (2022): 663–74. http://dx.doi.org/10.1039/d1mh01606g.

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A triboelectric nanogenerator based on bismuth tungstate (Bi2WO6):polyvinylidene fluoride-trifluoroethylene (P(VDF-TrFE)) is fabricated. It delivers an output voltage (open circuit) of 205 V and current density (short circuit) of 11.91 mA m−2 at ∼0.15 kgf without any electric poling.

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15

Chung, Hoi Ying, Weijian Chen, Xiaoming Wen, Judy N. Hart, Hao Wu, Yuekun Lai, Rose Amal, and Yun Hau Ng. "Oxygen-deficient bismuth tungstate and bismuth oxide composite photoanode with improved photostability." Science Bulletin 63, no. 15 (August 2018): 990–96. http://dx.doi.org/10.1016/j.scib.2018.06.012.

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16

Ketwong, Pradudnet, Mai Takashima, Akio Nitta, Pusit Pookmanee, and Bunsho Ohtani. "Hydrothermal synthesis and photocatalytic activities of stabilized bismuth vanadate/bismuth tungstate composites." Journal of Environmental Chemical Engineering 6, no. 2 (April 2018): 2048–54. http://dx.doi.org/10.1016/j.jece.2018.01.062.

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17

Hu, Tingxia, Haiping Li, Renjie Zhang, Na Du, and Wanguo Hou. "Thickness-determined photocatalytic performance of bismuth tungstate nanosheets." RSC Advances 6, no. 38 (2016): 31744–50. http://dx.doi.org/10.1039/c6ra03268k.

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The photocatalytic efficiency of Bi₂WO₆ nanosheets increases gradually with the ratio of specific surface area (S_BET) to nanosheet thickness (H), but decreases linearly with the increase of H² when the H is less than the light penetration depth.

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18

Zhang, Tingwen, Yanqiu Cao, Aijun Gong, Yujiao Wang, and Lina Qiu. "Photocatalytic Degradation of Microcystin-LR by Bismuth Tungstate." Asian Journal of Chemistry 26, no. 22 (2014): 7799–803. http://dx.doi.org/10.14233/ajchem.2014.17882.

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19

Rae, A. D., J. G. Thompson, and R. L. Withers. "Structure refinement of commensurately modulated bismuth tungstate, Bi2WO6." Acta Crystallographica Section B Structural Science 47, no. 6 (December 1, 1991): 870–81. http://dx.doi.org/10.1107/s0108768191008030.

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20

Radha, R., A. Srinivasan, P. Manimuthu, and S. Balakumar. "Tailored sunlight driven nano-photocatalyst: bismuth iron tungstate (BiFeWO6)." Journal of Materials Chemistry C 3, no. 39 (2015): 10285–92. http://dx.doi.org/10.1039/c4tc02284j.

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21

Ma, Xiao, Dezhi Kong, and Zihui Chang. "Preparation of Bismuth Tungstate Nanomaterials with Different Morphologies and Their Effect on Exercise Rehabilitation of Patients with Lumbar Disc Herniation." Journal of Healthcare Engineering 2022 (January 7, 2022): 1–10. http://dx.doi.org/10.1155/2022/1397896.

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It is understood that the effect of exercise rehabilitation drugs in patients with lumbar disc herniation is poor. Some studies have shown that bismuth tungstate nanomaterials with certain morphology can treat the exercise rehabilitation of patients with lumbar disc herniation. In order to help patients with lumbar disc herniation to a certain extent, in this paper, bismuth tungstate nanomaterials with different structures and morphologies were prepared by hydrothermal method, and viscous tungsten nanomaterials with different structures and morphologies were prepared by adjusting the pH value of the solution and the concentration of CTAB. In this paper, the structure and morphology of tungsten samples with different structure and morphology were characterized by CTAB X-ray (XRD) deflection and FESEM. It was found that the morphology of the samples changed after adding 0.02 mol/L surfactant CTAB in the reaction system, and when the concentration of CTAB was 0.04 mol/L, the nanotubes were stacked together under the action of surfactant. When the concentration of CTAB increased to 0.06 mol/L, the self-assembled nanocomposites tended to be petal like.

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22

Nefedov, P. V., and N. I. Leonyuk. "Composition, morphology, and properties of sodium-bismuth tungstate crystals." Crystallography Reports 54, no. 1 (January 2009): 141–45. http://dx.doi.org/10.1134/s1063774509010246.

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23

Rocha, Poliana Lima, Diego Augusto Batista Barbosa, José Renato de Oliveira Lima, Gilza Maria Piedade Prazeres, Carlos William de Araujo Paschoal, Maximo Siu Li, Elson Longo, Adeilton Pereira Maciel, and Marcio Aurélio Pinheiro Almeida. "Enhancement of symmetry-induced photoluminescence in bismuth tungstate microcrystals." Materials Letters 184 (December 2016): 298–300. http://dx.doi.org/10.1016/j.matlet.2016.08.041.

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24

Rae, A. D., J. G. Thompson, and R. L. Withers. "Structure refinement of commensurately modulated bismuth tungstate, Bi2WO6. Erratum." Acta Crystallographica Section B Structural Science 48, no. 2 (April 1, 1992): 240. http://dx.doi.org/10.1107/s0108768191014179.

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25

Kozlov, Sergey S., Anna B. Nikolskaia, Olga V. Alexeeva, Ekaterina K. Kosareva, Oksana V. Almjasheva, Viktor V. Gusarov, Oleg I. Shevaleevskiy, and Liudmila L. Larina. "Bismuth iron tungstate pyrochlore thin films for photovoltaic applications." Mendeleev Communications 32, no. 6 (November 2022): 757–58. http://dx.doi.org/10.1016/j.mencom.2022.11.016.

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26

Hu, Tingxia, Haiping Li, Na Du, and Wanguo Hou. "Iron-Doped Bismuth Tungstate with an Excellent Photocatalytic Performance." ChemCatChem 10, no. 14 (May 14, 2018): 3040–48. http://dx.doi.org/10.1002/cctc.201701965.

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27

Khedr, Tamer M., Said M. El-Sheikh, and Ewa Kowalska. "Bismuth Tungstate Nanoplates—Vis Responsive Photocatalyst for Water Oxidation." Nanomaterials 13, no. 17 (August 28, 2023): 2438. http://dx.doi.org/10.3390/nano13172438.

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The development of visible-light-responsive (VLR) semiconductor materials for effective water oxidation is significant for a sustainable and better future. Among various candidates, bismuth tungstate (Bi2WO6; BWO) has attracted extensive attention because of many advantages, including efficient light-absorption ability, appropriate redox properties (for O2 generation), adjustable morphology, low cost, and profitable chemical and optical characteristics. Accordingly, a facile solvothermal method has been proposed in this study to synthesize two-dimensional (2D) BWO nanoplates after considering the optimal preparation conditions (solvothermal reaction time: 10–40 h). To find the key factors of photocatalytic performance, various methods and techniques were used for samples’ characterization, including XRD, FE-SEM, STEM, TEM, HRTEM, BET-specific surface area measurements, UV/vis DRS, and PL spectroscopy, and photocatalytic activity was examined for water oxidation under UV and/or visible-light (vis) irradiation. Famous commercial photocatalyst–P25 was used as a reference sample. It was found that BWO crystals grew anisotropically along the {001} basal plane to form nanoplates, and all properties were controlled simultaneously by tuning the synthesis time. Interestingly, the most active sample (under both UV and vis), prepared during the 30 h solvothermal reaction at 433 K (BWO–30), was characterized by the smallest specific surface area and the largest crystals. Accordingly, it is proposed that improved crystallinity (which hindered charge carriers’ recombination, as confirmed by PL), efficient photoabsorption (using the smallest bandgap), and 2D mesoporous structure are responsible for the best photocatalytic performance of the BWO–30 sample. This report shows for the first time that 2D mesoporous BWO nanoplates might be successfully prepared through a facile template-free solvothermal approach. All the above-mentioned advantages suggest that nanostructured BWO is a prospective candidate for photocatalytic applications under natural solar irradiation.

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28

Guerreiro-Tanomaru, Juliane Maria, Ana Lívia G. Cornélio, Carolina Andolfatto, Loise P. Salles, and Mário Tanomaru-Filho. "pH and Antimicrobial Activity of Portland Cement Associated with Different Radiopacifying Agents." ISRN Dentistry 2012 (October 16, 2012): 1–5. http://dx.doi.org/10.5402/2012/469019.

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Objective. The aim of this study was to evaluate the antimicrobial activity and pH changes induced by Portland cement (PC) alone and in association with radiopacifiers. Methods. The materials tested were pure PC, PC + bismuth oxide, PC + zirconium oxide, PC + calcium tungstate, and zinc oxide and eugenol cement (ZOE). Antimicrobial activity was evaluated by agar diffusion test using the following strains: Micrococcus luteus, Streptococcus mutans, Enterococcus faecalis, Pseudomonas aeruginosa, and Candida albicans. After 24 hours of incubation at 37°C, inhibition of bacterial growth was observed and measured. For pH analysis, material samples () were placed in polyethylene tubes and immersed in 10 mL of distilled water. After 12, 24, 48, and 72 hours, the pH of the solutions was determined using a pH meter. Results. All microbial species were inhibited by the cements evaluated. All materials composed of PC with radiopacifying agents promoted pH increase similar to pure Portland cement. ZOE had the lowest pH values throughout all experimental periods. Conclusions. All Portland cement-based materials with the addition of different radiopacifiers (bismuth oxide, calcium tungstate, and zirconium oxide) presented antimicrobial activity and pH similar to pure Portland cement.

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29

Kovalevskiy, Nikita, Svetlana Cherepanova, Evgeny Gerasimov, Mikhail Lyulyukin, Maria Solovyeva, Igor Prosvirin, Denis Kozlov, and Dmitry Selishchev. "Enhanced Photocatalytic Activity and Stability of Bi2WO6 – TiO2-N Nanocomposites in the Oxidation of Volatile Pollutants." Nanomaterials 12, no. 3 (January 23, 2022): 359. http://dx.doi.org/10.3390/nano12030359.

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The development of active and stable photocatalysts for the degradation of volatile organic compounds under visible light is important for efficient light utilization and environmental protection. Titanium dioxide doped with nitrogen is known to have a high activity but it exhibits a relatively low stability due to a gradual degradation of nitrogen species under highly powerful radiation. In this paper, we show that the combination of N-doped TiO2 with bismuth tungstate prevents its degradation during the photocatalytic process and results in a very stable composite photocatalyst. The synthesis of Bi2WO6–TiO2-N composites is preformed through the hydrothermal treatment of an aqueous medium containing nanocrystalline N-doped TiO2, as well as bismuth (III) nitrate and sodium tungstate followed by drying in air. The effect of the molar ratio between the components on their characteristics and photocatalytic activity is discussed. In addition to an enhanced stability, the composite photocatalysts with a low content of Bi2WO6 also exhibit an enhanced activity that is substantially higher than the activity of individual TiO2-N and Bi2WO6 materials. Thus, the Bi2WO6–TiO2-N composite has the potential as an active and stable photocatalyst for efficient purification of air.

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Rajeshwar, Krishnan, Norma R. de Tacconi, and Hari K. Timmaji. "New-Generation Oxide Semiconductors for Solar Energy Conversion and Environmental Remediation." Journal of Nano Research 17 (February 2012): 185–91. http://dx.doi.org/10.4028/www.scientific.net/jnanor.17.185.

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Two Oxide Semiconductors, Namely, Bismuth Vanadate (BiVO4) and Silver Bismuth Tungstate (AgBiW2O8) Were Prepared by Solution Combustion Synthesis and their Attributes as Photocatalysts Were Comparatively Evaluated. A Key Conclusion of this Study Is that the Optical Characteristics Alone Provide only a Partial Glimpse into the Applicability of a Given Semiconductor for Solar Energy Conversion and Environmental Remediation. Thus while the Optical Bandgap of Bivo4 Is Lower than Agbiw2o8 (and Thus Is Able to Harness a Greater Portion of the Solar Spectrum), its Photocatalytic Activity for the Degradation of a Dye Is Inferior. this Finding Underlines the Fact that other Characteristics of the Semiconductor (band-Edge Alignment, Surface Quality Etc) Also Play as Critical a Role as the Optical Properties.

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31

黄, 腾. "Preparation of Sulfur-Doped Bismuth Tungstate and Their Photocatalytic Performance." Hans Journal of Nanotechnology 08, no. 03 (2018): 17–23. http://dx.doi.org/10.12677/nat.2018.83003.

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32

Gromov, O. G., A. P. Kuz’min, R. M. Usmanov, G. B. Kunshina, and E. P. Lokshin. "Solid-phase synthesis of sodium-bismuth tungstate NaBi(WO4)2." Russian Journal of Applied Chemistry 82, no. 7 (July 2009): 1160–63. http://dx.doi.org/10.1134/s1070427209070027.

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33

Du, Zoufei, Ronghui Guo, Jianwu Lan, Shouxiang Jiang, Cheng Cheng, Ludan Zhao, and Linghui Peng. "Preparation and photocatalytic activity of bismuth tungstate coated polyester fabric." Fibers and Polymers 18, no. 11 (November 2017): 2212–18. http://dx.doi.org/10.1007/s12221-017-7062-6.

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34

de Tacconi, Norma R., Hari Krishna Timmaji, Wilaiwan Chanmanee, Muhammad N. Huda, Pranab Sarker, Csaba Janáky, and Krishnan Rajeshwar. "Photocatalytic Generation of Syngas Using Combustion-Synthesized Silver Bismuth Tungstate." ChemPhysChem 13, no. 12 (March 16, 2012): 2945–55. http://dx.doi.org/10.1002/cphc.201200046.

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35

Nishida, Masaya, Hiroaki Takeda, Takashi Nishida, and Tadashi Shiosaki. "Syntheisis and Characterization of Bismuth Tungstate Crystals by Solution Growth Technique." Key Engineering Materials 350 (October 2007): 81–84. http://dx.doi.org/10.4028/www.scientific.net/kem.350.81.

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Growth of ferroelectric Bi2WO6 (BWO) mono-domain bulk crystals was attempted by the vertical-Bridgman (VB) method below the phase transition (ferro- to paraelectric) temperature of 940oC using Li2B4O7 as a flux. In this method, Pt crucibles with different shapes were used. The crucible with a wedged tip bottom produced BWO crystal with a thickness of over 4 mm along the crystallographic c-axis (perpendicular to the spontaneous polarization axis). Using BWO mono-domain crystals grown by slow cooling technique, on the other hand, their electric properties were characterized. The dielectric constants, ε ij, and electromechanical coupling factor, k33, of the crystals were 70-100 and 36% at room temperature, respectively.

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36

Bayoumi, Eman E., Mahmoud O. Abd El-Magied, Emad A. Elshehy, Bahig M. Atia, Karem A. Mahmoud, Lilly H. Khalil, and Ashraf A. Mohamed. "Lead–bismuth tungstate composite as a protective barrier against gamma rays." Materials Chemistry and Physics 275 (January 2022): 125262. http://dx.doi.org/10.1016/j.matchemphys.2021.125262.

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37

Amano, Fumiaki, Akira Yamakata, Kohei Nogami, Masatoshi Osawa, and Bunsho Ohtani. "Effect of Photoexcited Electron Dynamics on Photocatalytic Efficiency of Bismuth Tungstate." Journal of Physical Chemistry C 115, no. 33 (August 25, 2011): 16598–605. http://dx.doi.org/10.1021/jp2051257.

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Muktha, B., and T. N. Guru Row. "Crystal structure and ionic conductivity of a new bismuth tungstate, Bi3W2O10.5." Journal of Chemical Sciences 118, no. 1 (January 2006): 43–46. http://dx.doi.org/10.1007/bf02708764.

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39

Lee, Wen-Lian William, Shiuh-Tsuen Huang, Jia-Lin Chang, Jau-Yuan Chen, Mei-Chun Cheng, and Chiing-Chang Chen. "Photodegradation of CV over nanocrystalline bismuth tungstate prepared by hydrothermal synthesis." Journal of Molecular Catalysis A: Chemical 361-362 (September 2012): 80–90. http://dx.doi.org/10.1016/j.molcata.2012.04.015.

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40

Cao, Guangming, Jundie Hu, Yuanxing Wang, Jiafu Qu, Dekun Ma, Jiaqi Jin, Wei Sun, Xiaogang Yang, and Chang Ming Li. "Reaction kinetics on facet-engineered bismuth tungstate photoanodes for water oxidation." Applied Surface Science 613 (March 2023): 156081. http://dx.doi.org/10.1016/j.apsusc.2022.156081.

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41

Tian, Yue, Guomin Hua, Wei Xu, Nian Li, Ming Fang, and Lide Zhang. "Bismuth tungstate nano/microstructures: Controllable morphologies, growth mechanism and photocatalytic properties." Journal of Alloys and Compounds 509, no. 3 (January 2011): 724–30. http://dx.doi.org/10.1016/j.jallcom.2010.09.010.

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42

Khusravbekov, L., E. V. Charnaya, Cheng Tien, I. K. Rakhimov, B. F. Borisov, M. I. Salakhutdinov, and M. M. Ulfatshoev. "Phase transition in sodium bismuth tungstate NaBi(WO4)2- acoustic studies." physica status solidi (b) 245, no. 8 (August 2008): 1517–19. http://dx.doi.org/10.1002/pssb.200844087.

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43

Zhang, Yingjie, Huijuan Yu, Ruiqi Zhai, Jing Zhang, Cuiping Gao, Kezhen Qi, Li Yang, and Qiang Ma. "Recent Progress in Photocatalytic Degradation of Water Pollution by Bismuth Tungstate." Molecules 28, no. 24 (December 8, 2023): 8011. http://dx.doi.org/10.3390/molecules28248011.

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Abstract:

Photocatalysis has emerged as a highly promising, green, and efficient technology for degrading pollutants in wastewater. Among the various photocatalysts, Bismuth tungstate (Bi2WO6) has gained significant attention in the research community due to its potential in environmental remediation and photocatalytic energy conversion. However, the limited light absorption ability and rapid recombination of photogenerated carriers hinder the further improvement of Bi2WO6’s photocatalytic performance. This review aims to present recent advancements in the development of Bi2WO6-based photocatalysts. It delves into the photocatalytic mechanism of Bi2WO6 and summarizes the achieved photocatalytic characteristics by controlling its morphology, employing metal and non-metal doping, constructing semiconductor heterojunctions, and implementing defective engineering. Additionally, this review explores the practical applications of these modified Bi2WO6 photocatalysts in wastewater purification. Furthermore, this review addresses existing challenges and suggests prospects for the development of efficient Bi2WO6 photocatalysts. It is hoped that this comprehensive review will serve as a valuable reference and guide for researchers seeking to advance the field of Bi2WO6 photocatalysis.

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Sagadevan, Suresh. "Investigations on Microwave Assisted Synthesis and Characterization of Bi₂WO₆ Nanoparticles." Nano Hybrids 9 (November 2015): 24–32. http://dx.doi.org/10.4028/www.scientific.net/nh.9.24.

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Abstract:

Bismuth tungstate (Bi2WO6) nanoparticles were synthesized by microwave assisted method. The prepared nanoparticles were investigated by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), UV-visible spectroscopy and dielectric studies. The formation of Bi2WO6nanoparticles was confirmed by X-ray diffraction (XRD). The morphology of Bi2WO6nanoparticle was characterized using scanning electron microscopy SEM. The optical properties were studied by the UV-Visible absorption spectrum. The dielectric properties of Bi2WO6nanoparticles were studied. The activation energy was calculated from AC conductivity studies.Key words: Bi2WO6nanoparticles, XRD, SEM, TEM, UV analysis, Dielectric studies and AC conductivity studies

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Chen, Ying, Xu Wang, Hua Song, and Hua Lin Song. "Preparation and Photocatalytic Properties of Bi₂WO₆ with Different Morphologies." Advanced Materials Research 779-780 (September 2013): 390–93. http://dx.doi.org/10.4028/www.scientific.net/amr.779-780.390.

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Bismuth tungstate (Bi2WO6) microcrystalline with different surfactant were successfully prepared by a facile hydrothermal route.The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and BrunauerEmmettTeller surface area (BTE) in detail. The photocatalytic activity of the samples was also evaluated using the degradation of Rh B at room temperature under visible light irradiation. It was found that the surfactant played important roles in the formation process of controlling the morphology and structure of the catalyst and also had a great influence on the catalytic activity. SDS and CTAB effectively improved the catalytic activity and PVP was good at controlling morphologies.

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Li, Bin, Xiao Gang Yang, and Fang Lin Du. "Hydrothermal Synthesis and Photocatalytic Activities of Bi₂WO₆ with Different Surfactant." Applied Mechanics and Materials 395-396 (September 2013): 741–45. http://dx.doi.org/10.4028/www.scientific.net/amm.395-396.741.

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Bismuth-based oxides have attractive photocatalytic properties under visible light. Bismuth tungstate(Bi2WO6) particles as a visible light-responsive photocatalyst were prepared by a facile hydrothermal reaction method with the different surfactant assisted using Bi(NO3)3·5H2O and Na2WO4 as raw materials at 180°C for 24h. The as-prepared samples were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-vis absorption spectra (UV-vis). The photocatalytic activity of Bi2WO6 crystals was evaluated using the photocatalytic oxidation of rhodamine B (RhB) at room temperature under visible light irradiation. It was found that the morphology and the band gap adsorption edge of Bi2WO6 are different with the different surfactant assisted. The widest band gap energy of Bi2WO6 obtained with SDBS assisted is 2.624eV. In addition, the Bi2WO6 powders exhibit a certain photocatalytic properties to photodegrade RhB and the maximum photocatalytic degradation rate is 32.4% using Bi2WO6 prepared with PVP assisted for 2h.

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47

Murugan, G. Senthil, and K. B. R. Varma. "Pyroelectric, Ferroelectric and Optical Properties of Glass Nanocomposite: Lithium Borate--Bismuth Tungstate." Ferroelectrics 266, no. 1 (January 1, 2002): 595–611. http://dx.doi.org/10.1080/00150190211317.

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Murugan, G. Senthil, and K. B. R. Varma. "Pyroelectric, Ferroelectric and Optical Properties of Glass Nanocomposite: Lithium Borate--Bismuth Tungstate." Ferroelectrics 266 (2002): 595–611. http://dx.doi.org/10.1080/742768001.

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Wu, Daxiong, Haitao Zhu, Canying Zhang, and Lei Chen. "Novel synthesis of bismuth tungstate hollow nanospheres in water–ethanol mixed solvent." Chemical Communications 46, no. 38 (2010): 7250. http://dx.doi.org/10.1039/c0cc01249a.

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Murugan, G. Senthil, and K. B. R. Varma. "Structural, dielectric and optical properties of lithium borate–bismuth tungstate glass-ceramics." Materials Research Bulletin 34, no. 14-15 (November 1999): 2201–13. http://dx.doi.org/10.1016/s0025-5408(00)00174-4.

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