期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 60, 期 24, 页码 8720-8732出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.1c00713
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资金
- National Natural Science Foundation of China [21576050, 51602052]
- Fundamental Research Funds for the Central Universities of China [3207045403, 3207042107D, 3207042108D]
- Foundation of Jiangsu Key Laboratory for Biomass Energy and Material [JSBEM202001]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Zhongying Young Scholars of Southeast University and Postgraduate Research & Practice Innovation Program of Jiangsu Province [SJCX20_0014, SJCX20_0015]
This study achieved highly efficient photocatalytic CO2 reduction using a ternary photocatalyst, which displayed a Z-scheme charge transfer mechanism. By constructing a Schottky junction, the photocatalytic rates for CO and CH4 production were significantly enhanced.
Solar photocatalysis has long relied on the rational design of semiconductor photocatalysts. Herein, a ternary meso-TiO2@ZnIn2S4/Ti3C2 MXene photocatalyst is prepared and demonstrated with a core-shell structure accompanied by few-layered Ti3C2 Mxene on the ZnIn2S4 shell. The success of the synthesis depends on a two-step method consisting of hydrothermal and electrostatic self-assembly procedures. The ternary heterojunction exhibits a good behavior for photocatalytic CO2 reduction. A mechanism study of the photocatalytic reaction indicates that the photogenerated charges transfer in a Z-scheme pathway. Moreover, the construction of the Schottky junction between metallic Ti3C2 and TiO2@ZnIn2S4 is extremely effective for the reduction reaction. Consequently, the photocatalytic rates toward CO and CH4 production are up to 30.5 and 34.0 mu mol/g within 3 h of illumination by simulated sunlight, respectively, while the CH4 selectivity reaches 52.7%. This work provides a good strategy to achieve highly efficient photocatalytic CO2 reduction.
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