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SiO2-supported Pd nanoparticles for highly efficient, selective and stable phenol hydrogenation to cyclohexanone. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.112975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Zhao H, Zhang Y, Liu Q, Jing X, Yang W, Akanyange SN, Liu J, Xie H, Wang X, Crittenden J, Lyu X, Chang H. WSe 2-loaded co-catalysts Cu 3P and CNTs: Improving photocatalytic hydrogen precipitation and photocatalytic memory performance. J Colloid Interface Sci 2023; 629:937-947. [PMID: 36208606 DOI: 10.1016/j.jcis.2022.09.135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 09/18/2022] [Accepted: 09/25/2022] [Indexed: 12/28/2022]
Abstract
Photocatalytic decomposition of water for hydrogen production using semiconductor photocatalysts in visible light is considered one of the most promising environmentally friendly ways to produce hydrogen. In this work, the calcination method was adopted to prepare an efficient Cu3P/WSe2/CNTs composite photocatalysts. Cu3P and carbon nanotubes (CNTs) were used as co-catalysts to reduce the composite rate of the photogenerated supports of the photocatalyst. The unique metallic properties of Cu3P as a transition metal phosphide makes it a cost-effective alternative to noble metal co-catalysts. CNTs can serve both as co-catalysts and as a suitable carrier to accelerate the transfer rate of photogenerated electrons. The experimental results showed that the Cu3P/WSe2/CNTs composite photocatalyst exhibited stronger activities in photocatalytic hydrogen production than pure WSe2. In particular, a higher quantum yield of 30.27% at the range 400-700 nm was achieved with a loading of 4% CNTs, a calcination temperature of 300 °C and a calcination time of 2.0 h. In contrast, the quantum yield of pure WSe2 was only 14.01%. The highest hydrogen production rate was 6.987 mL in 4.0 h, and the average hydrogen production rate was 712.985 μmol·h-1g-1, which was 2.39 times higher than that of pure WSe2.The catalytic memory performance of the composite samples was also examined. The results indicated that the best catalytic memory performance was achieved under the pre-illumination condition of 5.0 h. The amount of hydrogen produced under darkness for 4.0 h was up to 4.934 mL and the average hydrogen production rate was 503.454 μmol·h-1g-1. The average hydrogen production rate was 1.69 times higher than the average hydrogen production rate of pure WSe2 under light conditions.
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Affiliation(s)
- Huaqing Zhao
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Yan Zhang
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China; Institute of Yellow River Delta Earth Surface Processes and Ecological Integrity, Shandong University of Science and Technology, Qingdao 266590, China.
| | - Qing Liu
- College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Xiaoqing Jing
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Weiting Yang
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Stephen Nyabire Akanyange
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Jia Liu
- College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Hongbo Xie
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Xiutong Wang
- Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - John Crittenden
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0595, USA
| | - Xianjun Lyu
- College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Hui Chang
- College of Electrical and Automation Engineering, Shandong University of Science and Technology, Qingdao 266590, China
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