期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 582, 期 -, 页码 647-657出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.08.047
关键词
Photocatalytic CO2 reduction; Ti3C2; g-C3N4; NHx-Ti; CH4
资金
- National Natural Science Foundation of China [21908108]
- Jiangsu Province Scientific and Technological Project [BK20180449]
- Fundamental Research Funds for the Central Universities [30919011218]
- Topnotch Academic Programs Project of Jiangsu Higher Education Institutions
- Open Fund for Large Instruments and Equipments of Nanjing University of Science and Technology
The study focused on constructing an efficient photocatalyst for converting CO2 into valuable fuel, where Ti3C2 was anchored on porous g-C3N4 through chemical bonding to achieve high CH4 production under visible light. The exceptional performance was attributed to the enhanced CO2 adsorption/activation capability and improved light-harvesting capability.
Constructing an efficient photocatalyst is critical for photocatalytic carbon dioxide (CO2) into valuable fuel. Herein, a high-efficiency catalyst was synthesized by a simple one-step electrostatic self-assembly method, in which Ti3C2 (TC) was anchored on porous g-C3N4 (PCN) with rich -NHx via NHx-Ti bond. Such a chemical interaction made the optimized TC/PCN-2 with 2 wt% loading of Ti3C2 possess highest CH4 production (0.99 mu mol.h(-1).g(catalyst)(-1)) under visible light (>420 nm), which was 14 times higher than that of pure PCN (0.07 mu mol.h(-1).g(catalyst)(-1)) at the same condition. More importantly, the TC/PCN-2 photocatalyst still maintained satisfied activity after four cycles. Besides the formation of NHx-Ti chemical bonding and superior conductivity of Ti3C2 as a co-catalyst, which facilitated interfacial charges separation and migration, the exceptional performance could also attribute to the enhanced CO2 adsorption/activation and improved light-harvesting capability. This work provided a potential application in energy conversion with MXene as an efficient co-catalyst. (c) 2020 Elsevier Inc. All rights reserved.
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