Characterization and performance study of GR/ZnWO4 and MoS2/ZnWO4 nanocomposite photocatalysts

Wang, Fei; Liu, Xiangchun; Hou, Shuhua; Yang, Zhe; Zhao, Kun; Zhang, Miao

doi:10.1007/s10854-023-09816-7

J Mater Sci: Mater Electron

2023

DOI: 10.1007/s10854-023-09816-7

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Characterization and performance study of GR/ZnWO4 and MoS2/ZnWO4 nanocomposite photocatalysts

Fei Wang

Xiangchun Liu

Shuhua Hou

et al.

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2024

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Cited by 2 publications

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Fabrication of S‐Scheme GDY‐CuI/ZnWO₄ Photocatalyst to Promote Electron Transfer for Enhanced Photocatalytic H₂ Evolution

Wang,

Xie

et al. 2024

Advanced Sustainable Systems

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The exceptional performance of graphdiyne (GDY) in photocatalysis for hydrogen evolution attracts much attention, but the narrow band gap of GDY complicates the effective realization of the dissociation between photogenerated charges and photogenerated holes. In this study, GDY‐CuI is synthesized by cross‐coupling method, and the wide bandgap ZnWO4 is introduced into it by low‐temperature mixing, which effectively constructed the GDY‐CuI/ZW‐50 double S‐scheme heterojunction. The optimized GDY‐CuI/ZW‐50 catalyst photocatalytic hydrogen evolution performance reached 308.61 µmol after 5 h of visible light irradiation, which is 12.86 and 6.56 times than that of GDY‐CuI and ZnWO4, respectively. The improved efficiency of hydrogen evolution is attributed to the formation of a double S‐scheme heterojunction between GDY, CuI, and ZnWO4 and an internal electric field, which promotes charge transfer, reduces the complexation rate of photogenerated electrons, and enhances the redox capacity of photogenerated charges. A combination of photoelectrochemical analysis, in situ X‐ray photoelectron spectroscopy (In situ XPS), ultraviolet photoelectron spectroscopy (UPS), and density functional theory (DFT) results revealed the electron transfer mechanism. This work will provide new ideas for the design and preparation of GDY‐based photocatalysts.

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Fabrication of S‐Scheme GDY‐CuI/ZnWO₄ Photocatalyst to Promote Electron Transfer for Enhanced Photocatalytic H₂ Evolution

Wang,

Xie

et al. 2024

Advanced Sustainable Systems

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Photocatalytic Degradation of a Herbicide Namely Glyphosate and Hexazinone from the Surface Water which will be Used as Drinking Water via Polyaniline/ZnWO4/WO3 and Evaluation of Acute Toxicity Assays

Özteki̇n,

Sponza

2024

International Journal of Chemical Engineering and Materials

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Polyaniline/Zinc tungsten oxide/Tungsten trioxide nanocomposites (PANI/ZnWO4/WO3 NCs) was prepared to remove glyphosate (GLP) and Hexazinone (HZN) herbicides from the surface water. The properties of PANI/ZnWO4/WO3 NCs was investigated using XRD, FTIR, FESEM, HRTEM, XPS analyses. The toxicity of NCs and treated wastewater were investigated using Microtox and Daphnia magna acute toxicity tests. The effects of increasing values of PANI/ZnWO4/WO3 NCs concentrations (0.1, 0.4, 0.6, 1.0 and 1.5 mg/l), PANI/ZnWO4/WO3 mass ratios (1:1:3, 1:2:3, 3:1:1 and 3:2:1), GLP concentrations (1, 2, 3 and 4 mg/l), photodegradation times (2, 10, 15 and 20 min), and solar light powers (20, 40, 60, 80 and 100 W/m2 ) on the GLP and HZN removals in the surface were examined. The results of the acute toxicity analysis performed showed that the acute toxicity in the surface water decreased significantly after photooxidation. The maximum removal conditions for 3 mg/l GLP (99.90%) were 1 mg/l PANI/ZnWO4/WO3 NCs with a PANI/ZnWO4/WO3 ratio of 1:2:3 after 15 min photodegradation time at 80 W/m2 sun light power while the maximum HZN removal was obtained as 96% after 15 min photodegradation, under 300 W solar light, at pH=7.0 and at 25oC. The crystalline monoclinic ZnWO4 and WO3 was detected from XRD analysis while PANI exhibited characteristic broad peak at 28.91° with an amorphous nature. FTIR spectra showed that pure ZnWO4 has the Zn–O–W vibrational bands. XPS analysis, exhibited reactive oxygen species. The charge/discharge analysis indicated that WO3 has a larger particle size that decreases surface density increasing the interplanar spacing between atoms. The introduction of ZnWO4 and WO3 nanoparticles into the PANI matrix enhanced the surface of the PANI/ZnWO4/WO3 NC.

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Characterization and performance study of GR/ZnWO4 and MoS2/ZnWO4 nanocomposite photocatalysts

Cited by 2 publications

References 34 publications

Fabrication of S‐Scheme GDY‐CuI/ZnWO₄ Photocatalyst to Promote Electron Transfer for Enhanced Photocatalytic H₂ Evolution

Fabrication of S‐Scheme GDY‐CuI/ZnWO₄ Photocatalyst to Promote Electron Transfer for Enhanced Photocatalytic H₂ Evolution

Photocatalytic Degradation of a Herbicide Namely Glyphosate and Hexazinone from the Surface Water which will be Used as Drinking Water via Polyaniline/ZnWO4/WO3 and Evaluation of Acute Toxicity Assays

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Characterization and performance study of GR/ZnWO4 and MoS2/ZnWO4 nanocomposite photocatalysts

Cited by 2 publications

References 34 publications

Fabrication of S‐Scheme GDY‐CuI/ZnWO4 Photocatalyst to Promote Electron Transfer for Enhanced Photocatalytic H2 Evolution

Fabrication of S‐Scheme GDY‐CuI/ZnWO4 Photocatalyst to Promote Electron Transfer for Enhanced Photocatalytic H2 Evolution

Photocatalytic Degradation of a Herbicide Namely Glyphosate and Hexazinone from the Surface Water which will be Used as Drinking Water via Polyaniline/ZnWO4/WO3 and Evaluation of Acute Toxicity Assays

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Fabrication of S‐Scheme GDY‐CuI/ZnWO₄ Photocatalyst to Promote Electron Transfer for Enhanced Photocatalytic H₂ Evolution

Fabrication of S‐Scheme GDY‐CuI/ZnWO₄ Photocatalyst to Promote Electron Transfer for Enhanced Photocatalytic H₂ Evolution