期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 264, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118504
关键词
TiO2; Amidated graphene; Amino group; Photocatalytic H-2 evolution
资金
- National Natural Science Foundation of China [21771142, 51872221]
- Fundamental Research Funds for the Central Universities of China [WUT 2019IB002]
To accelerate the H-2-evolution performance of graphene-modified photocatalytic materials, increasing effective interfacial active sites on graphene surface is greatly important. In this paper, ethylenediamine (EDA) as new and efficient interfacial H-2-evolution active sites was edge-selectively grafted on the reduced graphene oxide (rGO). Herein, the EDA-amidated graphene/TiO2 (TiO2/rGO-EDA) was successfully prepared by a facile acylation reaction via a selective reaction of amino groups in EDA with carboxylic groups on graphene edge. The highest H-2-evolution activity of TiO2/rGO-EDA reached 224.9 mu mol h(-1) g(-1), which was 3.96 and 1.53 times as high as that of TiO2 and TiO2/rGO, respectively. This can be attributed to the fact that the amino groups of amidated graphene act as active sites to efficiently adsorb H+ due to their strong nucleophilicity and then to accelerate the interfacial H-2-evolution reaction. Our paper demonstrates that the amino group is a promising H-2-evolution active site for developing new functionalized graphene-based photocatalysts.
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