期刊
CHINESE JOURNAL OF CATALYSIS
卷 40, 期 3, 页码 380-389出版社
SCIENCE PRESS
DOI: 10.1016/S1872-2067(18)63166-3
关键词
TiO2; Oxamide; Co-catalyst; Photocatalysis; Hydrogen evolution; Dye degradation
资金
- National Natural Science Foundation of China [51672113, 51602132]
- Six Talent Peaks Project in Jiangsu Province [2015-XCL-026]
- Natural Science Foundation of Jiangsu Province [BK20171299]
- Training Project of Jiangsu University for Young Cadre Teachers [5521220009]
- Youth Research Project of Jiangsu Health and Family Planning Commission [Q201609]
Accelerating the separation efficiency of photoexcited electron-hole pairs with the help of highly active co-catalysts has proven to be a promising approach for improving photocatalytic activity. Thus far, the most developed co-catalysts for semiconductor-based photocatalysis are inorganic materials; the employment of a specific organic molecule as a co-catalyst for photocatalytic hydrogen evolution and pollutant photodegradation is rare and still remains a challenging task. Herein, we report on the use of an organic molecule, oxamide (OA), as a novel co-catalyst to enhance electron-hole separation, photocatalytic H-2 evolution, and dye degradation over TiO2 nanosheets. OA-modified TiO2 samples were prepared by a wet chemical route and demonstrated improved light absorption in the visible-light region and more efficient charge transport. The photocatalytic performance of H-2 evolution from water splitting and rhodamine B (RhB) degradation for an optimal OA-modified TiO2 photocatalyst reached 2.37 mmol and 1.43. respectively, which were 2.4 and 3.8 times higher than those of pristine TiO2, respectively. A possible mechanism is proposed, in which the specific pi-conjugated structure of OA is suggested to play a key role in the enhancement of the charge transfer and catalytic capability of TiO2. This work may provide advanced insight into the development of a variety of metal-free organic molecules as functional co-catalysts for improved solar-to-fuel conversion and environmental remediation. (C) 2019, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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