Affiliation:
1. School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
2. School of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China
Abstract
The green and clean sunlight-driven catalytic conversion of CO2 into high-value-added chemicals can simultaneously solve the greenhouse effect and energy problems. The controllable preparation of semiconductor catalyst materials and the study of refined structures are of great significance for the in-depth understanding of solar-energy-conversion technology. In this study, we prepared nitrogen-doped NiO semiconductors using a one-pot molten-salt method. The research shows that the molten-salt system made NiO change from p-type to n-type. In addition, nitrogen doping enhanced the adsorption of CO2 on NiO and increased the separation of photogenerated carriers on the NiO. It synergistically optimized the CO2-reduction system and achieved highly active and selective CO2 photoreduction. The CO yield on the optimal nitrogen-doped photocatalyst was 235 μmol·g−1·h−1 (selectivity 98%), which was 16.8 times that of the p-type NiO and 2.4 times that of the n-type NiO. This can be attributed to the fact that the nitrogen doping enhanced the oxygen vacancies of the NiOs and their ability to adsorb and activate CO2 molecules. Photoelectrochemical characterization also confirmed that the nitrogen-doped NiO had excellent electron -transfer and separation properties. This study provides a reference for improving NiO-based semiconductors for photocatalytic CO2 reduction.
Funder
National Natural Science Foundation of China
Jiangxi Provincial Academic and Technical Leaders Training Program—Young Talents
Program of Qingjiang Excellent Young Talents, JXUST
Ganzhou Young Talents Program of Jiangxi Province
Postdoctoral Research Projects of Jiangxi Province in 2020
Jiangxi Province “Double Thousand Plan”
Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme
Jiangxi Provincial Natural Science Foundation
Foundation Engineering Research Center of Tungsten Resources High-Efficiency Development and Application Technology of the Ministry of Education
Subject
Chemistry (miscellaneous),Analytical Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Molecular Medicine,Drug Discovery,Pharmaceutical Science
Cited by
3 articles.
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