Photocatalytic CO2reduction for C2-Coxy-compounds on ZIF-67 derived carbon with TiO2

Pei Hsun Sung, Chih Yang Huang, Chan Yi Lin, Po Wen Chung, Yu Chung Chang, Li Chyong Chen, Hsin Yu Chen, Chien Neng Liao*, Erh Li Chiu, Cheng-Yu Wang

*此作品的通信作者

研究成果: Article同行評審

12 引文 斯高帕斯(Scopus)

摘要

Excess carbon dioxide emission accompanied by gross fossil fuel consumption has worsened the global warming crisis in recent decades. Photo-induced conversion of CO2 into hydrocarbons is a potential solution to mitigate both energy and environmental problems. However, conventional photocatalysts suffer low efficiency in CO2 conversion with often C1 and/or C2 products. In this work, pyrolyzed cobalt type zeolitic imidazolate framework (ZIF-67), namely ZIF-derived carbon (ZDC) with residual Co nanoparticles and the corresponding ZDC/TiO2 composite (ZDC/T), were adopted as gas-phase CO2 reduction photocatalysts. The ZDC photocatalyst is inclined to form C2 compound (acetaldehyde), while the ZDC/T composite has high selectivity in C3 product (acetone). High pyrolysis temperature would degrade the photocatalytic performance in neat ZDC due to enhanced cobalt aggregation and nitrogen loss after breaking ZIF-67 Co-N coordination. Alternatively, the pyrolyzed ZDC/T revealed superior photocatalytic CO2 reduction performance because the Co-N bonds were found to decrease without changing Co nanoparticle size and dissociation of nitrogen notably. In conclusion, we synthesized novel photocatalysts for multi-carbon (C2-C3) products with high selectivity, and provided a plausible mechanism to illustrate the formation process of multi-carbon products during photoreduction of CO2.

原文English
文章編號101920
頁(從 - 到)1-12
頁數12
期刊Journal of CO2 Utilization
58
DOIs
出版狀態Published - 4月 2022

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