期刊
MATERIALS RESEARCH BULLETIN
卷 137, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2020.111177
关键词
g-C3N4/ZnO composite; CO2 photoreduction; Charge transfer; Photocatalytic activity; CH4 selectivity
资金
- National Natural Science Foundation of China [21975190, 21573166, 21271146, 20973128]
- Science and Technology Planning Project of Shenzhen Municipality [JCYJ20180302153921190]
- Foundation for Innovative Research Groups of Hubei Province [2014CFA007]
A novel method for preparing g-C3N4/ZnO nanocomposites was proposed, which showed significantly enhanced CO2 photoreduction activity and CH4 production selectivity. This provides an ideal synthetic strategy for highly efficient CO2 photoreduction using g-C3N4-based hybrid materials.
Photocatalytic CO2 reduction to solar fuels is considered as a promising strategy to address the global warming and energy shortages. Herein, a novel method is proposed to prepare g-C3N4/ZnO nanocomposites via refluxing zinc salt methanol solution containing pre-formed g-C3N4 with KOH methanol solution as precipitating agent. Some in-situ grown ultrafine ZnO nanoparticles are decorated on ultrathin g-C3N4 layers with well-defined interface, which not only causes efficient charge transfer and separation, but also creates more active sites for CO2 adsorption and activation. The resultant g-C3N4/ZnO composites demonstrate significant enhanced CO2 photoreduction activity and selectivity for CH4 production under visible light irradiation, and the optimal g-C3N4/ZnO composite delivers the best overall photoactivity (158.4 mu mol g(-1) h(-1)) with CH4/CO production rates of 19.8/0.37 mu mol g(-1) h(-1), which is 9.42 times higher than that of g-C3N4 alone. This work provides an ideal synthetic strategy for g-C3N4-based hybrid materials with highly efficient CO2 photoreduction.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据