期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 289, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120039
关键词
TiO2; Polydopamine; Hollow sphere; Photocatalytic CO2 reduction; S-scheme heterojunction
资金
- NSFC [21871217, 22002091, 21972094, 51932007, 51961135303, U1705251, U1905215]
- National Key Research and Development Program of China [2018YFB1502001]
- Shenzhen Innovation Program [JCYJ20190808142001745]
- Guangdong Special Support Program
- Pengcheng Scholar Program
- Postdoctoral Science Foundation of China [2020M672809]
This study fabricated polydopamine-modified TiO2 hollow spheres and investigated their effect on the photocatalytic CO2 reduction activities. The results showed that the PDA wrapping significantly enhanced the photocatalytic activity and methane selectivity, leading to improved yields.
Photocatalytic CO2 conversion into solar fuels has been a promising strategy to utilize abundant solar energy and alleviate greenhouse effect. Herein, a series of polydopamine-modified TiO2 (TiO2@PDA) hollow spheres were fabricated by in situ self-polymerization of dopamine to systematically investigate the effect of PDA wrapping on the photocatalytic CO2 reduction activities of TiO2. Among all TiO2@PDA composite photocatalysts, the highest value of methane yield (1.50 mu mol h(-1) g(-1)) was achieved with 0.5 % PDA, which was 5 times than that of pure TiO2 (0.30 mu mol h(-1) g(-1)). The improvement of photocatalytic activity and methane selectivity was ascribed to the enhanced light absorption, promoted CO2 adsorption capacity, increased reduction power of photogenerated electrons, as well as efficient separation and transfer of photogenerated charge carriers induced by the S-scheme heterojunction between TiO2 and PDA. This work provides a facile surface modification method with cost-effective polymer materials in photocatalytic CO2 conversion.
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