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CdS/BiOBr Nanocomposite with Enhanced Activity under Visible Light for Photocatalytic Reduction of CO2 in Cyclohexanol

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Abstract

The CdS/BiOBr nanocomposites were synthesized through a hydrothermal deposition method. The structure and properties of the as-prepared nanocomposites were characterized by XRD, SEM, TEM, UV–Vis DRS, and PL. The characterizations indicated that the CdS/BiOBr nanocomposites exhibited flower-like microsphere morphologies with good crystallinity, and showed strong photoabsorption both UV and visible light. The photocatalytic activities were investigated in photocatalytic CO2 reduction in cyclohexanol under visible light irradiation. The CdS/BiOBr nanocomposites showed much better photocatalytic activity than the pristine BiOBr sample. The highest yields of the expected products (cyclohexyl formate and cyclohexanone were obtained over 5% CdS/BiOBr composite. A plausible mechanism for photocatalytic CO2 reduction was proposed suggesting that the formation of heterojunction in the composite can facilitate charge transfer, which led to an improved photocatalytic activity.

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Funding

This work was financially supported by the Natural Science projects of Shaanxi Polytechnic Institute (2021YKYB-056).

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Authors and Affiliations

  1. School of Chemical Engineering and Textile Clothing, Shaanxi Polytechnic Institue, 712000, Xianyang, China

    G. Song

  2. Xi’an Modern Chemistry Research Institute, 710065, Xi’an, China

    X. Wu

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  1. G. Song
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  2. X. Wu
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Correspondence to X. Wu.

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Abbreviations: XRD, X-ray diffraction; FESEM, field-emission scanning electron microscope; TEM, transmission electron microscopy; UV–Vis DRS, UV–Vis diffuse reflectance spectra; PL, photoluminescence; XPS, X-ray photoelectron spectroscopy; GC–MS, gas chromatography–mass spectrometry; EDS, energy-dispersive X-ray spectroscopy; CF, cyclohexyl formate; CH, cyclohexanone; CB, conduction band; VB, valence bond; NHE, normal hydrogen electrode; CTAB, cetyltrimethylammonium bromide.

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Song, G., Wu, X. CdS/BiOBr Nanocomposite with Enhanced Activity under Visible Light for Photocatalytic Reduction of CO2 in Cyclohexanol. Kinet Catal 62 (Suppl 1), S1–S8 (2021). https://doi.org/10.1134/S0023158422020100

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  • DOI: https://doi.org/10.1134/S0023158422020100

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