Z-scheme hierarchical Cu2S/Bi2WO6 composites for improved photocatalytic activity of glyphosate degradation under visible light irradiation

Tang, Qiang-Yong; Chen, Wenfeng; Lv, Yan-Ran; Yang, Siyuan; Xu, Yuehua

doi:10.1016/j.seppur.2019.116243

Cited by 50 publications

(25 citation statements)

References 44 publications

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“…The metal oxides' mono-component samples exhibited oxygen excess due to the oxygen atmosphere used for the annealing treatment. However, the Cu 2 S benchmark showed a sulfur deficit, which was consistent with other studies [48][49][50] indicating the tendency of sulfur sublimation during the thermal treatment. The sublimation was significantly reduced by the low thermal temperature treatment and Ar environment around the capsule.…”

Section: Composition and Morphologysupporting

confidence: 91%

Photocatalytic Activity of Cu2S/WO3 and Cu2S/SnO2 Heterostructures for Indoor Air Treatment

Eneşca

Isac

2021

Materials

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Volatile organic compounds (VOCs) are commonly found in indoor spaces (e.g., homes or offices) and are often related to various illnesses, some of them with carcinogenic potential. The origins of VOC release in the indoor environment are in office products, building materials, electronics, cleaning products, furniture, and maintenance products. VOC removal can be done based on two types of technologies: adsorption in specific materials and decomposition via oxidative processes. The present article reports the development and photocatalytic activity of two heterostructures (Cu2S/WO3 and Cu2S/SnO2) used for indoor air decontamination. The acetaldehyde removal rate is discussed in correlation with the S-scheme mechanisms established between the heterostructure components but also comparatively with the bare catalysts’ activity. Acetaldehyde was considered as a VOC reference because it was found by the International Agency for Research on Cancer to be one of the most frequent air toxins with potential carcinogenic effects. The samples contained monoclinic WO3, tetragonal SnO2, and orthorhombic Cu2S crystalline structures. The Cu2S crystallite size in the heterostructure varied from 75.9 to 82.4 Å, depending on the metal oxide substrate. The highest photocatalytic efficiency (75.7%) corresponded to Cu2S/SnO2, with a constant rate of 0.106 s−1 (which was three times faster than WO3 or SnO2 and seven and a half times faster than Cu2S).

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Section: Composition and Morphologysupporting

confidence: 91%

Photocatalytic Activity of Cu2S/WO3 and Cu2S/SnO2 Heterostructures for Indoor Air Treatment

Eneşca

Isac

2021

Materials

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“…2A ), the obvious peaks such as the symmetric and asymmetric stretching peaks between W and O atoms on Bi 2 WO 6 in 600–1000 cm −1 region were observed. Moreover, the band observed at 308 cm −1 was corresponded to O–WO– group’s bending, whereas the bands detected at 788 and 822 cm −1 were ascribed to asymmetrical and symmetrical modes of O–WO groups, respectively [ 53 , 54 ]. The asymmetrical bridging mode relating to the tungstate chain was confirmed by the peak at 698 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

Sensitive sandwich-type electrochemical SARS-CoV‑2 nucleocapsid protein immunosensor

et al. 2021

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“…Cu 2 S is another earth‐abundant copper material that can be prepared via simple chemical techniques and improve photocatalytic H 2 generation by providing superior semiconducting properties to absorb solar energy. Cu 2 S has a small bandgap (1.2‐1.8 eV) and absorbs solar energy in the visible spectrum 93‐95 . The CB edge potential of Cu 2 S is lower than the reduction potential of H 2 O/H 2 , resulting in superior HER performance.…”

Section: Co‐catalysts On Metal Oxides For Photocatalytic Hydrogen Gen...mentioning

confidence: 99%

An overview of co‐catalysts on metal oxides for photocatalytic water splitting

Rosman

Yunus

Shah

et al. 2022

Intl J of Energy Research

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Hydrogen (H 2 ) generation through photoelectrochemical (PEC) water splitting is a promising approach to reducing energy crises and associated environmental problems. Among currently available semiconductors, 2D nanostructured metal oxides have attracted wide interest in PEC applications because of their low-cost synthesis routes, stability in aqueous media, unique configuration and features, and favorable band edge positions. However, metal oxides still suffer from the severe recombination of photogenerated charge carriers and the low consumption of visible light. One solution is to introduce co-catalysts to enhance photocatalytic H 2 generation by improving charge separation and transfer, extending light absorption, and lowering the activation energy. This review summarizes the fundamentals and recent developments of co-catalysts on metal oxides which can be classified into the following categories: metal cocatalysts, metal sulfide co-catalysts, metal hydroxide co-catalysts, metal phosphide co-catalysts, carbon-based co-catalysts, and dual co-catalysts. Charge transfer mechanisms of co-catalysts on metal oxides in photocatalytic H 2 generation and present future trends for co-catalysts and strategies in enhancing PEC water splitting are also presented.

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Z-scheme hierarchical Cu2S/Bi2WO6 composites for improved photocatalytic activity of glyphosate degradation under visible light irradiation

Cited by 50 publications

References 44 publications

Photocatalytic Activity of Cu2S/WO3 and Cu2S/SnO2 Heterostructures for Indoor Air Treatment

Photocatalytic Activity of Cu2S/WO3 and Cu2S/SnO2 Heterostructures for Indoor Air Treatment

Sensitive sandwich-type electrochemical SARS-CoV‑2 nucleocapsid protein immunosensor

An overview of co‐catalysts on metal oxides for photocatalytic water splitting

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