The development of CO2 into hydrocarbon fuels has emerged as a green method that could help mitigate global warning.The novel structured photocatalyst is a promising material for use in a photocatalytic and magneto-electrochemical method that fosters the reduction of CO2 by suppressing the recombination of electron-hole pairs and effectively transferring the electrons to the surface for the chemical reaction of CO2 reduction.In our study,we have developed a novel-structured AgCuZnS2-graphene-TiO2 to analyze its catalytic activity toward the selective evolution of CO2.The selectivity of each nanocomposite substantially enhanced the activity of the AgCuZnS2-graphene-TiO2 ternary nanocomposite due to the successful interaction,and the selectivity of the final product was improved to a value 3 times higher than that of the pure AgCuZnS2 and 2 times higher than those of AgCuZnS2-graphene and AgCuZnS2-TiO2 under ultra-violet(UV)-light(λ=254 nm)irradiation in the photocatalytic process.The electrochemical CO2 reduction test was also conducted to analyze the efficacy of the AgCuZnS2-graphene-TiO2 when used as a working electrode in laboratory electrochemical cells.The electrochemical process was conducted under different experimental conditions,such as various scan rates(mV·s-1),under UV-light and with a 0.07 T magnetic-core.The evolution of CO2 substantially improved under UV-light(λ=254 nm)and with 0.07 T magnetic-core treatment;these improvements were attributed to the facts that the UV-light activated the electron-transfer pathway and the magnetic core controlled the pathway of electron-transmission/prevention to protect it from chaotic electron movement.Among all tested nanocomposites,AgCuZnS2-graphene-TiO2 absorbed the CO2 most strongly and showed the best ability to transfer the electron to reduce the CO2 to methanol.We believe that our newly-modeled ternary nanocomposite opens up new opportunities for the evolution of CO2 to methanol through an electrochemical and photocatalytic process.

Zambaga Otgonbayar;Kwang Youn Cho;Chong-Hun Jung;Won-Chun Oh

Department of Advanced Materials Science&Engineering,Hanseo University,Seosan-Si 31962,Korea;Korea Institutes of Ceramic Engineering and Technology,Jinju-Si 660031,Korea;Decommissioning Technology Research Division,Korea Atomic Energy Research Institute,Daejeon 305-600,Korea;Anhui International Joint Research Center for Nano Carbon-based Materials and Environmental Health,College of Materials Science and Engineering,Anhui University of Science&Technology,Huainan 232001,China

化学科学与工程前沿

[1]Zambaga Otgonbayar;Kwang Youn Cho;Chong-Hun Jung;Won-Chun Oh-.Newly-modeled graphene-based ternary nanocomposite for the magnetophotocatalytic reduction of CO2 with electrochemical performance)[J].化学科学与工程前沿,2022(10):1438-1459

magnetophotocatalytic,AgCuZnS2

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