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Volume 13
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10.3390/catal13030522
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Article

Photocatalytic CO2 Reduction to CH4 and Dye Degradation Using Bismuth Oxychloride/Bismuth Oxyiodide/Graphitic Carbon Nitride (BiOmCln/BiOpIq/g-C3N4) Nanocomposite with Enhanced Visible-Light Photocatalytic Activity

by
Yong-Ming Dai
1,
Wu-Tsan Wu
2,
Yu-Yun Lin
2,
Hsiao-Li Wu
2,
Szu-Han Chen
2,
Jih-Mirn Jehng
3,
Jia-Hao Lin
2,
Fu-Yu Liu
2 and
Chiing-Chang Chen
2,*
1
Department of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taichung 411, Taiwan
2
Department of Science Education and Application, National Taichung University of Education, Taichung 403, Taiwan
3
Department of Chemical Engineering, National Chung Hsing University, Taichung 402, Taiwan
*
Author to whom correspondence should be addressed.
Catalysts 2023, 13(3), 522; https://doi.org/10.3390/catal13030522
Submission received: 1 February 2023 / Revised: 21 February 2023 / Accepted: 1 March 2023 / Published: 3 March 2023
(This article belongs to the Special Issue Trends in Environmental Applications of Advanced Oxidation Processes)
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Abstract

The use of visible-light-driven photocatalysts in wastewater treatment, photoreduction of CO2, green solar fuels, and solar cells has elicited substantial research attention. Bismuth oxyhalide and its derivatives are a group of visible-light photocatalysts that can diminish electron–hole recombination in layered structures and boost photocatalytic activity. The energy bandgap of these photocatalysts lies in the range of visible light. A simple hydrothermal method was applied to fabricate a series of bismuth oxychloride/bismuth oxyiodide/grafted graphitic carbon nitride (BiOmCln/BiOpIq/g-C3N4) sheets with different contents of g-C3N4. The fabricated sheets were characterized through XRD, TEM, SEM-EDS, XPS, UV-vis DRS, PL, and BET. The conversion efficiency of CO2 reduction to CH4 of BiOmCln/BiOpIq of 4.09 μmol g−1 can be increased to 39.43 μmol g−1 by compositing with g-C3N4. It had an approximately 9.64 times improvement. The photodegradation rate constant for crystal violet (CV) dye of BiOmCln/BiOpIq of k = 0.0684 can be increased to 0.2456 by compositing with g-C3N4. It had an approximately 3.6 times improvement. The electron paramagnetic resonance results and the quenching effects indicated that 1O2, •OH, h+, and •O2− were active species in the aforementioned photocatalytic degradation. Because of their heterojunction, the prepared ternary nanocomposites possessed the characteristics of a heterojunction of type II band alignment.
Keywords: composites; photocatalysis; BiOmCln; BiOpBrq; g-C3N4; CO2 reduction composites; photocatalysis; BiOmCln; BiOpBrq; g-C3N4; CO2 reduction
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MDPI and ACS Style

Dai, Y.-M.; Wu, W.-T.; Lin, Y.-Y.; Wu, H.-L.; Chen, S.-H.; Jehng, J.-M.; Lin, J.-H.; Liu, F.-Y.; Chen, C.-C. Photocatalytic CO2 Reduction to CH4 and Dye Degradation Using Bismuth Oxychloride/Bismuth Oxyiodide/Graphitic Carbon Nitride (BiOmCln/BiOpIq/g-C3N4) Nanocomposite with Enhanced Visible-Light Photocatalytic Activity. Catalysts 2023, 13, 522. https://doi.org/10.3390/catal13030522

AMA Style

Dai Y-M, Wu W-T, Lin Y-Y, Wu H-L, Chen S-H, Jehng J-M, Lin J-H, Liu F-Y, Chen C-C. Photocatalytic CO2 Reduction to CH4 and Dye Degradation Using Bismuth Oxychloride/Bismuth Oxyiodide/Graphitic Carbon Nitride (BiOmCln/BiOpIq/g-C3N4) Nanocomposite with Enhanced Visible-Light Photocatalytic Activity. Catalysts. 2023; 13(3):522. https://doi.org/10.3390/catal13030522

Chicago/Turabian Style

Dai, Yong-Ming, Wu-Tsan Wu, Yu-Yun Lin, Hsiao-Li Wu, Szu-Han Chen, Jih-Mirn Jehng, Jia-Hao Lin, Fu-Yu Liu, and Chiing-Chang Chen. 2023. "Photocatalytic CO2 Reduction to CH4 and Dye Degradation Using Bismuth Oxychloride/Bismuth Oxyiodide/Graphitic Carbon Nitride (BiOmCln/BiOpIq/g-C3N4) Nanocomposite with Enhanced Visible-Light Photocatalytic Activity" Catalysts 13, no. 3: 522. https://doi.org/10.3390/catal13030522

APA Style

Dai, Y.-M., Wu, W.-T., Lin, Y.-Y., Wu, H.-L., Chen, S.-H., Jehng, J.-M., Lin, J.-H., Liu, F.-Y., & Chen, C.-C. (2023). Photocatalytic CO2 Reduction to CH4 and Dye Degradation Using Bismuth Oxychloride/Bismuth Oxyiodide/Graphitic Carbon Nitride (BiOmCln/BiOpIq/g-C3N4) Nanocomposite with Enhanced Visible-Light Photocatalytic Activity. Catalysts, 13(3), 522. https://doi.org/10.3390/catal13030522

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