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Journal articles on the topic 'CuWO4'

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Author: Grafiati

Published: 9 March 2023

Last updated: 10 March 2023

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1

Peng, Ben, Mengyang Xia, Chao Li, Changshen Yue, and Peng Diao. "Network Structured CuWO4/BiVO4/Co-Pi Nanocomposite for Solar Water Splitting." Catalysts 8, no. 12 (December 17, 2018): 663. http://dx.doi.org/10.3390/catal8120663.

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A network structured CuWO4/BiVO4 nanocomposite with a high specific surface area was prepared from CuWO4 nanoflake (NF) arrays via a method that combined drop-casting and thermal annealing. The obtained CuWO4/BiVO4 exhibited high catalytic activity toward photoelectrochemical (PEC) water oxidation. When cobalt phosphate (Co-Pi) was coupled with CuWO4/BiVO4, the activity of the resulting CuWO4/BiVO4/Co-Pi composite for the oxygen evolution reaction (OER) was further improved. The photocurrent density (Jph) for OER on CuWO4/BiVO4/Co-Pi is among the highest reported on a CuWO4-based photoanode in a neutral solution. The high activity for the PEC OER was attributed to the high specific surface area of the composite, the formation of a CuWO4/BiVO4 heterojunction that accelerated electron–hole separation, and the coupling of the Co-Pi co-catalyst with CuWO4/BiVO4, which improved the charge transfer rate across composite/solution interface.

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2

Li, Chao, and Peng Diao. "Boosting the Activity and Stability of Copper Tungsten Nanoflakes toward Solar Water Oxidation by Iridium-Cobalt Phosphates Modification." Catalysts 10, no. 8 (August 10, 2020): 913. http://dx.doi.org/10.3390/catal10080913.

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Severe interfacial electron–hole recombination greatly limits the performance of CuWO4 photoanode towards the photoelectrochemical (PEC) oxygen evolution reaction (OER). Surface modification with an OER cocatalyst can reduce electron–hole recombination and thus improve the PEC OER performance of CuWO4. Herein, we coupled CuWO4 nanoflakes (NFs) with Iridium–cobalt phosphates (IrCo-Pi) and greatly improved the photoactivity of CuWO4. The optimized photocurrent density for CuWO4/IrCo-Pi at 1.23 V vs. reversible hydrogen electrode (RHE) rose to 0.54 mA∙cm−2, a ca. 70% increase over that of bare CuWO4 (0.32 mA∙cm−2). Such improved photoactivity was attributed to the enhanced hole collection efficiency, which resulted from the reduced charge-transfer resistance via IrCo-Pi modification. Moreover, the as-deposited IrCo-Pi layer well coated the inner CuWO4 NFs and effectively prevented the photoinduced corrosion of CuWO4 in neutral potassium phosphate (KPi) buffer solution, eventually leading to a superior stability over the bare CuWO4. The facile preparation of IrCo-Pi and its great improvement in the photoactivity make it possible to design an efficient CuWO4/cocatalyst system towards PEC water oxidation.

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3

Thiruppathi, M., M. Vahini, P. Devendran, M. Arunpandian, K. Selvakumar, C. Ramalingan, M. Swaminathan, and E. R. Nagarajan. "CuWO4 Nanoparticles: Investigation of Dielectric, Electrochemical Behaviour and Photodegradation of Pharmaceutical Waste." Journal of Nanoscience and Nanotechnology 19, no. 11 (November 1, 2019): 7026–34. http://dx.doi.org/10.1166/jnn.2019.16601.

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The hydrothermally synthesized CuWO4 nanoparticles (NPs) were characterized with different analysis such as X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), High Resolution Transmission Electron Microscopy (HRTEM), Energy Dispersive X-ray Spectroscopy (EDX), Cyclic Voltammetry (CV), UV-Visible and Photoluminescence (PL) analysis. The prepared CuWO4 NPs were examined with Electrochemical Impedance Spectroscopy (EIS). SEM images show that CuWO4 NPs are highly spherical shaped morphology and porous in nature. The optical band gap of prepared CuWO4 NPs is found to be 2.12 eV. Photodegradation of diclofenac sodium (DFS) (medical waste) in the aqueous medium with CuWO4 NPs under visible light irradiation shows 98% degradation. The CuWO4 NPs was stable up to 5th cycle it can be used as a reusable photocatalyst for the DFS degradation. The electrical conductivity and dielectric properties of the CuWO4 NPs at room temperature is analyzed by EIS studies. The bulk conductivity value of the prepared nanoparticles is 1.477×10-5 S/cm at room temperature. The conductivity of CuWO4 NPs is found to be due to electrons movement. The CuWO4 NPs shows higher photocatalytic and electrocatalytic activity for decomposition of DFS and methanol electro-oxidation in alkaline medium respectively.

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4

Andrade Neto, N. F., Y. G. Oliveira, J. H. O. Nascimento, M. R. D. Bomio, and F. V. Motta. "Influence of pH variation on CuWO4, CuWO4/WO3 and CuWO4/CuO structures stabilization: study of the photocatalytic properties under sunlight." Journal of Materials Science: Materials in Electronics 31, no. 20 (September 8, 2020): 18221–33. http://dx.doi.org/10.1007/s10854-020-04371-x.

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5

Goncalves, Renato Vitalino, Lucas Gabriel Rabelo, Washington Santa Rosa, and Luis Zampaulo. "Ternary-Oxides CuWO₄/BiVO₄/FeCoO_x Films for Photoelectrochemical Water Oxidation: Insights into the Photoinduced Charge Transfer Pathway." ECS Meeting Abstracts MA2022-01, no. 36 (July 7, 2022): 1585. http://dx.doi.org/10.1149/ma2022-01361585mtgabs.

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Photoelectrochemical (PEC) water oxidation using semiconductor oxide films as a working electrode is an essential approach for investigating the effective utilization of sunlight and the production of green fuel. Herein, we report a ternary-oxides-based CuWO4/BiVO4/FeCoOx film deposited entirely by RF-magnetron sputtering using homemade ceramic targets. Our CuWO4/BiVO4 photoanode exhibits a significant photocurrent density of 0.82 mA/cm² at 1.23 V vs. RHE under AM 1.5G illumination, corresponding to a record > 380% increase to that of pure CuWO4 photoanode. To further boost the PEC performance, we deposited an ultrathin layer of amorphous FeCoOx cocatalyst, resulting in a triple CuWO4/BiVO4/FeCoOx heterojunction with a significant reduction in onset potential and a 500% increase in photocurrent density of pure CuWO4. Experimental studies and numeric computations were used to provide insights into the photoinduced charge carrier pathway across heterojunctions. Our results reveal noticeable interface potential barriers for charge carriers at the CuWO4/BiVO4 heterojunction, potentially lowering PEC efficiency without external potentials. Conversely, the deposition of the FeCoOx ultrathin layer over the CuWO4/BiVO4 heterojunction induces a - junction on the BiVO4/FeCoOx interface, which, when combined with the abundant FeCoOx oxygen vacancies, results in improved charge separation and transport, as well as enhanced photoelectrochemical stability. Our study provides a feasible strategy for producing photocatalytic heterojunctions systems and novel tools for investigating interface effects on photoinduced charge carrier pathways for PEC water splitting.

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6

Ágoston, Áron, and László Janovák. "Hydrothermal Co-Crystallization of Novel Copper Tungstate-Strontium Titanate Crystal Composite for Enhanced Photocatalytic Activity and Increased Electron–Hole Recombination Time." Catalysts 13, no. 2 (January 27, 2023): 287. http://dx.doi.org/10.3390/catal13020287.

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The development of catalysts continues to have a significant influence on science today since we can utilize them to efficiently destroy some contaminants. A study in this field is justified because there is a dearth of comprehensive literature on the creation of SrTiO3-based photocatalysts. Related to this topic, here we report the facile preparation of a structure-modified SrTiO3 photocatalyst, by incorporating CuWO4. Within the case of the CuWO4-modified samples (0.5–3 wt% nominal CuWO4 content), the photo-oxidation of phenol, as a contaminant, was more than two times higher than the initial SrTiO3. However, the photocatalytic activity does not change linearly with increasing CuWO4 content, and the CWS2.5 (2.5 wt% nominal CuWO4 content and 4.25 wt% measured content) has the highest photo-activity under the applied conditions. The reason for the better activity was the increased recombination time of charge separation on the catalyst surface. Slower recombination can result in more water being oxidized to hydroxyl radicals, leading to the faster decomposition of the phenol.

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7

Dorfman, Leonid P., David L. Houck, Michael J. Scheithauer, Jeffrey N. Dann, and Harry O. Fassett. "Solid-phase synthesis of cupric tungstate." Journal of Materials Research 16, no. 4 (April 2001): 1096–102. http://dx.doi.org/10.1557/jmr.2001.0152.

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The high degree of mixing of W and Cu phases in copper tungstates makes them an attractive source for manufacturing W–Cu composite powders. Hydrogen reduction of copper tungstates provides composite W–Cu powder products with a uniform, homogeneous dispersion of the metal phases. This paper presents test results for a variety of solid-phase reactions to synthesize cupric tungstate (CuWO4). Hydrated, dehydrated, and complex oxides of tungsten and copper have been used as solid reactants. With stoichiometric ratios of reactants, synthesis in air at 800 °C produced 96% to 100% conversion to CuWO4. Heterogeneous synthesis of CuWO4 with the participation of three solid phases (S1 + S2 →S3) required the simplest, most inexpensive equipment. The end product properties of synthesized CuWO4 could be controlled by the proper choice of reactants.

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8

Mathew, T., N. M. Batra, and S. K. Arora. "Electrical conduction in CuWO4 crystals." Journal of Materials Science 27, no. 15 (1992): 4003–8. http://dx.doi.org/10.1007/bf01105096.

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9

Arora, S. K., and T. Mathew. "Dielectric studies of CuWO4 crystals." Physica Status Solidi (a) 116, no. 1 (November 16, 1989): 405–13. http://dx.doi.org/10.1002/pssa.2211160141.

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10

Abbas, Zaheer, Razium Ali Soomro, Nazar Hussain Kalwar, Mawada Tunesi, Magnus Willander, Selcan Karakuş, and Ayben Kilislioğlu. "In Situ Growth of CuWO4 Nanospheres over Graphene Oxide for Photoelectrochemical (PEC) Immunosensing of Clinical Biomarker." Sensors 20, no. 1 (December 25, 2019): 148. http://dx.doi.org/10.3390/s20010148.

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Procalcitonin (PCT) protein has recently been identified as a clinical marker for bacterial infections based on its better sepsis sensitivity. Thus, an increased level of PCT could be linked with disease diagnosis and therapeutics. In this study, we describe the construction of the photoelectrochemical (PEC) PCT immunosensing platform based on it situ grown photo-active CuWO4 nanospheres over reduced graphene oxide layers (CuWO4@rGO). The in situ growth strategy enabled the formation of small nanospheres (diameter of 200 nm), primarily composed of tiny self-assembled CuWO4 nanoparticles (2–5 nm). The synergic coupling of CuWO4 with rGO layers constructed an excellent photo-active heterojunction for photoelectrochemical (PEC) sensing. The platform was then considered for electrocatalytic (EC) mechanism-based detection of PCT, where inhibition of the photocatalytic oxidation signal of ascorbic acid (AA), subsequent to the antibody–antigen interaction, was recorded as the primary signal response. This inhibition detection approach enabled sensitive detection of PCT in a concentration range of 10 pg·mL−1 to 50 ng.mL−1 with signal sensitivity achievable up to 0.15 pg·mL−1. The proposed PEC hybrid (CuWO4@rGO) could further be engineered to detect other clinically important species.

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11

Kannan, S., V. Balasubramanian, K. Mohanraj, and G. Sivakumar. "Preparation of h-WO3/CuWO4 microsphere and single crystalline CuWO4 nanoparticles and their electrocatalytic activity." Vacuum 191 (September 2021): 110381. http://dx.doi.org/10.1016/j.vacuum.2021.110381.

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12

Dorfman, L. P., D. L. Houck, M. J. Scheithauer, and T. A. Frisk. "Synthesis and hydrogen reduction of tungsten–copper composite oxides." Journal of Materials Research 17, no. 4 (April 2002): 821–30. http://dx.doi.org/10.1557/jmr.2002.0120.

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Cupric tungstate (CuWO4) can be synthesized at high rates of conversion from a variety of solid reactants. However, the fixed copper content in the metal phase of CuWO4 limits its use as an oxide precursor for making W–Cu composite powders. This paper presents test results on synthesis of CuWO4-based composite oxides with a variable content of copper in the metal phase (5–25.7%). Hydrogen reduction converts the oxides to W–Cu composite powders with a unique phase distribution: each individual particle consists of a tungsten phase and a copper phase in which the tungsten phase substantially encapsulates the copper phase. These powders, when pressed and sintered without activators, yield high-density parts with a very fine microstructure and high electrical and thermal conductivity.

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13

El-Gharbawy, S., M. Ahmed, M. Khalil, and H. El-G hany. "Preparation and Characterization of CuWO4 Nanoparticles." Journal of Scientific Research in Science 33, part1 (September 1, 2016): 225–38. http://dx.doi.org/10.21608/jsrs.2016.15630.

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14

Arora, S. K., Thomas Mathew, and N. M. Batra. "Optical characterization of CuWO4 single crystals." Journal of Physics and Chemistry of Solids 50, no. 7 (January 1989): 665–68. http://dx.doi.org/10.1016/0022-3697(89)90002-4.

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15

Smilyk, V. O., S. S. Fomanyuk, I. A. Rusetskiy, M. O. Danilov, and G. Ya Kolbasov. "COMPARATIVE ANALYSIS OF ELECTROCHROMIC PROPERTIES OF CuWO4•WO3, Bi2WO6•WO3 AND WO3 THIN FILMS." Chemical Problems 20, no. 4 (2022): 289–96. http://dx.doi.org/10.32737/2221-8688-2022-3-289-296.

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A comparative analysis of electrochromic properties of composites CuWO4•WO3, Bi2WO6•WO3 and WO3 films obtained by electrochemical and chemical methods was carried out. The study into the kinetics of light transmission and spectral characteristics of electrochromic coloration revealed some differences in electrochromic processes. It found that in the WO3, Bi2WO6•WO3, CuWO4•WO3 series, lithium intercalation in the film is slowed down, which is due to diffusion limitations in the process of coloring of the Bi and Cu oxides. Spectral characteristics of light transmission Bi2WO6•WO3 and CuWO4•WO3 also differ from WO3 in that the contribution to light absorption is also made by Bi and Cu oxides, which are partially reduced by lithium in the process of their coloring. It is shown that the metal tungstates can be effective electrochromic materials with an additional absorption band in the visible region

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16

Rodríguez-Gutiérrez, Ingrid, Essossimna Djatoubai, Manuel Rodríguez-Pérez, Jinzhan Su, Geonel Rodríguez-Gattorno, Lionel Vayssieres, and Gerko Oskam. "Photoelectrochemical water oxidation at FTO|WO3@CuWO4 and FTO|WO3@CuWO4|BiVO4 heterojunction systems: An IMPS analysis." Electrochimica Acta 308 (June 2019): 317–27. http://dx.doi.org/10.1016/j.electacta.2019.04.030.

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17

Hirst, James, Sönke Müller, Daniel Peeters, Alexander Sadlo, Lukas Mai, Oliver Mendoza Reyes, Dennis Friedrich, et al. "Comparative Study of Photocarrier Dynamics in CVD-deposited CuWO4, CuO, and WO3 Thin Films for Photoelectrocatalysis." Zeitschrift für Physikalische Chemie 234, no. 4 (April 28, 2020): 699–717. http://dx.doi.org/10.1515/zpch-2019-1485.

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AbstractThe temporal evolution of photogenerated carriers in CuWO4, CuO and WO3 thin films deposited via a direct chemical vapor deposition approach was studied using time-resolved microwave conductivity and terahertz spectroscopy to obtain the photocarrier lifetime, mobility and diffusion length. The carrier transport properties of the films prepared by varying the copper-to-tungsten stoichiometry were compared and the results related to the performance of the compositions built into respective photoelectrochemical cells. Superior carrier mobility was observed for CuWO4 under frontside illumination.

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18

Uemura, Yohei, Ahmed S. M. Ismail, Sang Han Park, Soonnam Kwon, Minseok Kim, Yasuhiro Niwa, Hiroki Wadati, et al. "Femtosecond Charge Density Modulations in Photoexcited CuWO4." Journal of Physical Chemistry C 125, no. 13 (March 26, 2021): 7329–36. http://dx.doi.org/10.1021/acs.jpcc.0c10525.

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19

Grigioni, Ivan, Annalisa Polo, Maria Vittoria Dozzi, Lucia Ganzer, Benedetto Bozzini, Giulio Cerullo, and Elena Selli. "Ultrafast Charge Carrier Dynamics in CuWO4 Photoanodes." Journal of Physical Chemistry C 125, no. 10 (March 4, 2021): 5692–99. http://dx.doi.org/10.1021/acs.jpcc.0c11607.

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20

Chen, Guihua, Yong Wang, Liya Fan, Xianqiang Xiong, Chunyan Zhu, Chenglin Wu, and Guoliang Dai. "Electrospun CuWO4 nanofibers for visible light photocatalysis." Materials Letters 251 (September 2019): 23–25. http://dx.doi.org/10.1016/j.matlet.2019.05.032.

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21

Tomaszewicz, E., A. Worsztynowicz, and S. M. Kaczmarek. "Subsolidus phase relations in CuWO4–Gd2WO6 system." Solid State Sciences 9, no. 1 (January 2007): 43–51. http://dx.doi.org/10.1016/j.solidstatesciences.2006.11.010.

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22

Davi, Martin, Markus Mann, Zili Ma, Felix Schrader, Andreas Drichel, Serhiy Budnyk, Anna Rokicinska, Piotr Kustrowski, Richard Dronskowski, and Adam Slabon. "An MnNCN-Derived Electrocatalyst for CuWO4 Photoanodes." Langmuir 34, no. 13 (March 19, 2018): 3845–52. http://dx.doi.org/10.1021/acs.langmuir.8b00149.

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23

Ruiz-Fuertes, J., M. N. Sanz-Ortiz, J. González, F. Rodríguez, A. Segura, and D. Errandonea. "Optical absorption and Raman spectroscopy of CuWO4." Journal of Physics: Conference Series 215 (March 1, 2010): 012048. http://dx.doi.org/10.1088/1742-6596/215/1/012048.

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24

Forsyth, J. B., C. Wilkinson, and A. I. Zvyagin. "The antiferromagnetic structure of copper tungstate, CuWO4." Journal of Physics: Condensed Matter 3, no. 43 (October 28, 1991): 8433–40. http://dx.doi.org/10.1088/0953-8984/3/43/010.

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25

Yu, Fuju, U. Schanz, and E. Schmidbauer. "Single crystal growth of FeWO4 and CuWO4." Journal of Crystal Growth 132, no. 3-4 (September 1993): 606–8. http://dx.doi.org/10.1016/0022-0248(93)90088-e.

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26

Atuchin, V. V., I. B. Troitskaia, O. Yu Khyzhun, V. L. Bekenev, and Yu M. Solonin. "Electronic Structure of h-WO₃ and CuWO₄ Nanocrystals, Harvesting Materials for Renewable Energy Systems and Functional Devices." Applied Mechanics and Materials 110-116 (October 2011): 2188–93. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.2188.

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— The electronic structure of hexagonal WO3 and triclinic CuWO4 nanocrystals, prospective materials for renewable energy production and functional devices, has been studied using the X-ray photoelectron spectroscopy (XPS) and X-ray emission spectroscopy (XES) methods. The present XPS and XES results render that the W 5d-and O 2p-like states contribute throughout the whole valence-band region of the h-WO3 and CuWO4 nanocrystalline materialls, however maximum contributions of the O 2p-like states occur in the upper, whilst the W 5d-like states in the lower portions of the valence band, respectively.

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27

Vasilyeva, Marina S., Vladimir S. Rudnev, A. P. Parkhomchuk, Irina V. Lukiyanchuk, Ksenia A. Sergeeva, and Alexander A. Sergeev. "Plasma Electrolytic Formation of WO₃-CuO or WO₃-CuWO₄ Oxide Layers on Titanium." Key Engineering Materials 806 (June 2019): 51–56. http://dx.doi.org/10.4028/www.scientific.net/kem.806.51.

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The oxide layers on titanium were formed by plasma electrolytic oxidation technique in acid aqueous electrolytes containing sodium tungstate and copper acetate. The coatings with WO3-CuO or WO3-CuWO4 oxide layers have been formed in the electrolytes with H2C2O4 (pH~6) or H2SO4 (pH~4) accordingly. The coatings with WO3-CuWO4 have a developed surface architecture. The surface is constructed from coral-like structures with lamellar nanocrystals containing copper tungstate and tungsten oxide. The layers of tungsten oxide nanocrystals occupy the depressions between these structures. The band gap of the mixed WO3CuWO4 oxide layers is 2.8 eV.

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28

Gonzalez, Carlos M., Mike L. Post, Jeffrey Dunford, and Xiaomei Du. "NOx Sensing with n-type WO3 - CuWO4 Composites." ECS Transactions 35, no. 30 (December 16, 2019): 81–95. http://dx.doi.org/10.1149/1.3653926.

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29

Blatnik, M., C. Drechsel, N. Tsud, S. Surnev, and F. P. Netzer. "Decomposition of Methanol on Mixed CuO–CuWO4 Surfaces." Journal of Physical Chemistry B 122, no. 2 (September 2017): 679–87. http://dx.doi.org/10.1021/acs.jpcb.7b06233.

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30

Gao, Yuan, Omid Zandi, and Thomas W. Hamann. "Atomic layer stack deposition-annealing synthesis of CuWO4." Journal of Materials Chemistry A 4, no. 8 (2016): 2826–30. http://dx.doi.org/10.1039/c5ta06899a.

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31

Arora, S. K., Thomas Mathew, and N. M. Batra. "Growth and important properties of CuWO4 single crystals." Journal of Crystal Growth 88, no. 3 (May 1988): 379–82. http://dx.doi.org/10.1016/0022-0248(88)90011-5.

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32

Ahmed, Jahangeer, Norah Alhokbany, Tansir Ahamad, and Saad M. Alshehri. "Investigation of enhanced electro-catalytic HER/OER performances of copper tungsten oxide@reduced graphene oxide nanocomposites in alkaline and acidic media." New Journal of Chemistry 46, no. 3 (2022): 1267–72. http://dx.doi.org/10.1039/d1nj04617a.

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In this paper, we investigate the electro-catalytic hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) of synthesized copper tungsten oxide@reduced graphene oxide (CuWO4@rGO) nanocomposites.

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33

Gao, Yuan, and Thomas W. Hamann. "Quantitative hole collection for photoelectrochemical water oxidation with CuWO4." Chemical Communications 53, no. 7 (2017): 1285–88. http://dx.doi.org/10.1039/c6cc09029j.

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Quantitative hole collection via water oxidation was achieved with CuWO₄; however, use of H₂O₂ as a hole scavenger gives rise to current multiplication and misleadingly low values.

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34

Gao, Yuan, and Thomas W. Hamann. "Elucidation of CuWO4 Surface States During Photoelectrochemical Water Oxidation." Journal of Physical Chemistry Letters 8, no. 12 (June 6, 2017): 2700–2704. http://dx.doi.org/10.1021/acs.jpclett.7b00664.

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35

Lhermitte, Charles R., and Bart M. Bartlett. "Advancing the Chemistry of CuWO4 for Photoelectrochemical Water Oxidation." Accounts of Chemical Research 49, no. 6 (May 26, 2016): 1121–29. http://dx.doi.org/10.1021/acs.accounts.6b00045.

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36

Ruiz-Fuertes, J., D. Errandonea, A. Segura, F. J. Manjón, Zh Zhu, and C. Y. Tu. "Growth, characterization, and high-pressure optical studies of CuWO4." High Pressure Research 28, no. 4 (December 2008): 565–70. http://dx.doi.org/10.1080/08957950802446643.

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37

Salimi, R., A. A. Sabbagh Alvani, B. T. Mei, N. Naseri, S. F. Du, and G. Mul. "Ag-Functionalized CuWO4/WO3 nanocomposites for solar water splitting." New Journal of Chemistry 43, no. 5 (2019): 2196–203. http://dx.doi.org/10.1039/c8nj05625k.

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A new plasmonic Ag-functionalized CuWO₄/WO₃ hetero-structured photoanode was successfully prepared via a PVP-assisted sol–gel (PSG) route and electrophoretic deposition which reveals 4 times enhanced photocurrent density compared with pristine WO₃.

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38

Khyzhun, O. Yu, T. Strunskus, S. Cramm, and Yu M. Solonin. "Electronic structure of CuWO4: XPS, XES and NEXAFS studies." Journal of Alloys and Compounds 389, no. 1-2 (March 2005): 14–20. http://dx.doi.org/10.1016/j.jallcom.2004.08.013.

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39

Catto, Ariadne C., Tomas Fiorido, Érica L. S. Souza, Waldir Avansi, Juan Andres, Khalifa Aguir, Elson Longo, Laécio S. Cavalcante, and Luís F. da Silva. "Improving the ozone gas-sensing properties of CuWO4 nanoparticles." Journal of Alloys and Compounds 748 (June 2018): 411–17. http://dx.doi.org/10.1016/j.jallcom.2018.03.104.

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40

Sedighi, Farideh, Mahdiyeh Esmaeili-Zare, Ali Sobhani-Nasab, and Mohsen Behpour. "Synthesis and characterization of CuWO4 nanoparticle and CuWO4/NiO nanocomposite using co-precipitation method; application in photodegradation of organic dye in water." Journal of Materials Science: Materials in Electronics 29, no. 16 (June 21, 2018): 13737–45. http://dx.doi.org/10.1007/s10854-018-9504-3.

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41

Anucha, Chukwuka Bethel, Ilknur Altin, Emin Bacaksız, Tayfur Kucukomeroglu, Masho Hilawie Belay, and Vassilis N. Stathopoulos. "Enhanced Photocatalytic Activity of CuWO4 Doped TiO2 Photocatalyst Towards Carbamazepine Removal under UV Irradiation." Separations 8, no. 3 (February 26, 2021): 25. http://dx.doi.org/10.3390/separations8030025.

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Abatement of contaminants of emerging concerns (CECs) in water sources has been widely studied employing TiO2 based heterogeneous photocatalysis. However, low quantum energy yield among other limitations of titania has led to its modification with other semiconductor materials for improved photocatalytic activity. In this work, a 0.05 wt.% CuWO4 over TiO2 was prepared as a powder composite. Each component part synthesized via the sol-gel method for TiO2, and CuWO4 by co-precipitation assisted hydrothermal method from precursor salts, underwent gentle mechanical agitation. Homogenization of the nanopowder precursors was performed by zirconia ball milling for 2 h. The final material was obtained after annealing at 500 °C for 3.5 h. Structural and morphological characterization of the synthesized material has been achieved employing X-ray diffraction (XRD), Fourier transform infra-red (FTIR) spectroscopy, Brunauer–Emmett–Teller (BET) N2 adsorption–desorption analysis, Scanning electron microscopy-coupled Energy dispersive X-ray spectroscopy (SEM-EDS), Transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and UV-Vis diffuse reflectance spectroscopy (UV-vis DRS) for optical characterization. The 0.05 wt.% CuWO4-TiO2 catalyst was investigated for its photocatalytic activity over carbamazepine (CBZ), achieving a degradation of almost 100% after 2 h irradiation. A comparison with pure TiO2 prepared under those same conditions was made. The effect of pH, chemical scavengers, H2O2 as well as contaminant ion effects (anions, cations), and humic acid (HA) was investigated, and their related influences on the photocatalyst efficiency towards CBZ degradation highlighted accordingly.

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42

Hashempour, M., Hamid Reza Rezaie, Hekmat Razavizadeh, M. T. Salehi, H. Mehrjoo, and M. Ardestani. "Investigation on Fabrication of W-Cu Nanocomposite via a Thermochemical Co-Precipitation Method and its Consolidation Behavior." Journal of Nano Research 11 (May 2010): 57–66. http://dx.doi.org/10.4028/www.scientific.net/jnanor.11.57.

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W-25%Cu nanocomposite was produced via a thermochemical co-precipitation procedure. Copper nitrate and sodium tungstate salts were used as Cu and W containing precursors respectively. Aqueous solutions of these salts were reacted under controlled pH condition prepared by ammonia addition and the resulting precipitates were then calcined at 450oC and hydrogen reduced at 800oC. The products of each step were characterized by XRD and Electron Microscope. Using a basic medium with a pH of 13 which caused the formation of complex Cu(NH3)42+ was found to provide suitable condition for precipitation of nanosized composite powders. Cu2WO4(OH)2 and CuWO4.2H2O as raw precipitates, CuWO4-x , CuO, and WO3 as calcined powders, and W-Cu reduced composite powders, all were seen to keep nanosize dimensions through high temperature treatments of fabrication. Sintering of the reduced powders at the temperature of 1150oC led in a density of about 98% theoretical density.

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43

Habibi, Mohammad Mehdi, Mitra Mousavi, Zahra Shadman, and Jahan B. Ghasemi. "Preparation of a nonenzymatic electrochemical sensor based on a g-C₃N₄/MWO₄ (M: Cu, Mn, Co, Ni) composite for the determination of H₂O₂." New Journal of Chemistry 46, no. 8 (2022): 3766–76. http://dx.doi.org/10.1039/d1nj05711a.

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The GCE was modified with g-C3N4/MWO4 to obtain g-C3N4/MWO4/GCE and applied in H2O2 detection. Under optimized conditions, g-C3N4/CuWO4/GCE displayed superior sensing features, wide linear range, low detection limit, high sensitivity and selectivity.

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44

Cui, Yanyan, Xi Chen, Yan Cheng, Xinyi Lu, Jiajia Meng, Ziwei Chen, Mengke Li, Chengcheng Lin, Yaling Wang, and Jian Yang. "CuWO4 Nanodots for NIR-Induced Photodynamic and Chemodynamic Synergistic Therapy." ACS Applied Materials & Interfaces 13, no. 19 (May 7, 2021): 22150–58. http://dx.doi.org/10.1021/acsami.1c00970.

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45

Pilli, Satyananda Kishore, Todd G. Deutsch, Thomas E. Furtak, Logan D. Brown, John A. Turner, and Andrew M. Herring. "BiVO4/CuWO4 heterojunction photoanodes for efficient solar driven water oxidation." Physical Chemistry Chemical Physics 15, no. 9 (2013): 3273. http://dx.doi.org/10.1039/c2cp44577h.

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46

Proctor, Aaron D., Shobhana Panuganti, and Bart M. Bartlett. "CuWO4 as a photocatalyst for room temperature aerobic benzylamine oxidation." Chemical Communications 54, no. 9 (2018): 1101–4. http://dx.doi.org/10.1039/c7cc07611h.

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47

Souza, E. L. S., J. C. Sczancoski, I. C. Nogueira, M. A. P. Almeida, M. O. Orlandi, M. S. Li, R. A. S. Luz, M. G. R. Filho, E. Longo, and L. S. Cavalcante. "Structural evolution, growth mechanism and photoluminescence properties of CuWO4 nanocrystals." Ultrasonics Sonochemistry 38 (September 2017): 256–70. http://dx.doi.org/10.1016/j.ultsonch.2017.03.007.

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48

Lake, B., and D. A. Tennant. "Models of magnetic excitations in the dimer-chain compound CuWO4." Physica B: Condensed Matter 234-236 (June 1997): 557–59. http://dx.doi.org/10.1016/s0921-4526(96)01178-7.

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Lima, A. E. B., M. J. S. Costa, R. S. Santos, N. C. Batista, L. S. Cavalcante, E. Longo, and G. E. Luz. "Facile preparation of CuWO4 porous films and their photoelectrochemical properties." Electrochimica Acta 256 (December 2017): 139–45. http://dx.doi.org/10.1016/j.electacta.2017.10.010.

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Zych, Marta, Karolina Syrek, Ewelina Wiercigroch, Kamilla Malek, Marcin Kozieł, and Grzegorz D. Sulka. "Visible-light sensitization of anodic tungsten oxide layers with CuWO4." Electrochimica Acta 368 (February 2021): 137591. http://dx.doi.org/10.1016/j.electacta.2020.137591.

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