| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Construction of Type Ⅱ Heterojunction of Nb2O5/BiOCl for Enhanced Photocatalytic Carbon Dioxide Reduction |
| WU Shuqi1, HUANG Ze'ai1,2, LI Qingchuan1, RAO Zhiqiang1, ZHOU Ying1,2
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1 The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China
2 State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu 610500, China |
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Abstract In this work, a type Ⅱ heterojunction of Nb2O5/BiOCl composite material was prepared and applied to photocatalytic reduction of carbon dioxide (CO2). Different weight percentages (5wt% and 11wt%) of Nb2O5 was applied to fabricate different composition of type Ⅱ heterojunction of Nb2O5/BiOCl materials, the interface between the two materials was observed using transmission electron microscopy (TEM). The formation of type Ⅱ heterojunction was confirmed with the measurement of the position of the valence band using X-ray photoelectron spectroscopy (XPS), together with the width of the forbidden band derived from UV-vis diffuse reflection spectra. It was found that this type Ⅱ heterojunction material enhanced the visible light absorption range. The fluorescence spectrum (PL) showed that the ability of photogenerated electrons-hole separation efficiency was improved. As a result, the photocatalytic activities for the CO2 reduction indicated the activity of all the produced products was improved over type Ⅱ heterojunction of 5wt% Nb2O5/BiOCl. The yields of the products of CO, CH4, and H2 were 1.3 times, 2.8 times, and 1.9 times that of bare BiOCl; and 2.7 times, 2.0 times, 1.1 times that of bare Nb2O5, respectively. Finally, the possible reaction ways of CO2 over Nb2O5/BiOCl was proposed. This work might provide a new idea for the design of an efficient BiOCl-based heterostructure for photocatalytic CO2 reduction.
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Published: 23 March 2021
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| Fund:National Natural Science Foundation of China (U1862111), Scientific Research Starting Project of SWPU(2018QHZ020), the Sichuan Provincial International Cooperation Project (2019YFH0164) and College Students' Extracurricular Open Experiment Project of SWPU (KSZ19526). |
About author:: Shuqi Wu, a graduate student of Southwest Petroleum University. From September 2013 to June 2017, he obtained a bachelor's degree from East China University of Science and Technology. From September 2017 to present, he has been studying for a master's degree at Southwest Petroleum University.
Ze'ai Huang, lecturer. After graduating from Kyoto University with a Ph.D. in Japan in 2018, he conducted his post-doctoral research in National Institute of Advanced Industrial Science and Technology (AIST) in Japan. He is now a lecturer in Southwest Petroleum University. He is mainly engaged in research of high-value utilization of unconventional natural gas. He has published more than 20 SCI papers, cited more than 700, with an H index of 13.
Ying Zhou obtained his M.E. degree from Central South University in inorganic non-metallic materials in 2004, received a master's degree in materials science from the Shanghai Institute of Optics and Fine Mecha-nics, Chinese Academy of Sciences in 2007, received a Ph.D. from the University of Zurich (UZH), Switzerland in 2010, and was awarded a postdoctoral fellowship by the University of Zurich Excellent Youth Fund Research, and engaged in research work at the Karlsruhe Institute of Technology (KIT), Germany, with funding from the Humboldt Foundation. He is a professor at Southwest Petroleum University, a doctoral tutor, young scholars of the “Changjiang Scholars Award Program”, Humboldt Scholars in Germany, JSPS invited scholars in Japan, Sichuan experts, outstanding experts with outstanding contributions in Sichuan Province and lecture professors at Kyoto University in Japan. Published more than 120 SCI papers, cited more than 3 400 positively by SCI, with an H index of 34. His research team is mainly engaged in research including: solar chemical conversion; in-situ characterization technology of materials; catalytic materials related to the utilization of oil and gas resources and so on. |
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2021, Vol. 35 
