Surface oxygen vacancy facilitated Z-scheme MoS2/Bi2O3 heterojunction for enhanced visible-light driven photocatalysis-pollutant degradation and hydrogen production |
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| Affiliation: | 1. Department of Biotechnology, Yeungnam University, 214-1, Dae-hakro 280, Gyeongsan, Gyeongbuk 712-749, Republic of Korea;2. Department of Chemical Engineering, Yeungnam University, 214-1, Dae-hakro 280, Gyeongsan, Gyeongbuk 712-749, Republic of Korea;3. Department of Instrumentation, Sri Venkateswara University, Tirupati, 517 502, India;4. School of Mechanical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea;5. Future Materials & Devices Lab., Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City 700000, Viet Nam;6. The Faculty of Environmental and Chemical Engineering, Duy Tan University, Da Nang 550000, Viet Nam;1. Centro de Ciencias Aplicadas y Desarrollo Tecnológico, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, A.P. 70-186, Delegación Coyoacán, C.P. 04510, Cd. Mx. México;2. Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, A. P. 70-360, Coyoacán, C.P. 04510, Cd. Mx. México;1. Post Graduate Teaching Department of Chemistry, Rashtrasant Tukdoji Maharaj Nagpur University, Nagpur-440033, India;2. Post Graduate Department of Chemistry, Seth Kesarimal Porwal College of Arts, Science and Commerce, Kamptee-441001, India;3. Research and Development Division, Apple Chemie India Private Limited, Nagpur-441108, India;4. Post Graduate Department of Microbiology, Seth Kesarimal Porwal College of Arts, Science and Commerce, Kamptee-441001, India;1. College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu, 225002, PR China;2. College of Chemical Engineering, Yangzhou Polytechnic Institute, Yangzhou, Jiangsu, 225127, PR China;1. Hunan Province Key Laboratory of Applied Environmental Photocatalysis, Changsha University, Changsha 410022, China;2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China |
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| Abstract: | An oxygen-vacancy rich, bismuth oxide (Bi2O3) based MoS2/Bi2O3 Z-scheme heterojunction catalyst (2-BO-MS) was prepared in an autoclave hydrothermal method using ethanol and water. The performance of MoS2/Bi2O3 catalyst was examined for photocatalytic hydrogen evolution, photoelectrochemical activity, and crystal violet (CV) dye degradation by comparing with pristine Bi2O3 and MoS2. The hydrogen evolution performances of 2-BO-MS catalyst exhibited 3075.21 μmol g?1 h?1, which is 7.18 times higher than that of MoS2 (428.14 μmol g?1 h?1). The XPS, XRD and HRTEM analyses covered that the superior photocatalytic performance of 2-BO-MS catalyst might have stemmed out due to the existence of oxygen vacancies, enhanced strong interfacial interaction between MoS2 and Bi2O3 and specific surface area. The in-depth investigation has been performed for MoS2/Bi2O3 Z-scheme heterojunction using several characterization techniques. Moreover, the photocatalytic mechanism for hydrogen evolution and photodegradation were proposed based on trapping experiment results. This results acquired using MoS2/Bi2O3 Z-scheme heterojunction would be stepping stone for developing heterojunction catalyst towards attaining outstanding photocatalytic activity. |
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| Keywords: | Layered material Nanocomposite Solar energy Z-Scheme |
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