期刊
ACS CATALYSIS
卷 5, 期 2, 页码 941-947出版社
AMER CHEMICAL SOC
DOI: 10.1021/cs502002u
关键词
photocatalysis; graphitic carbon nitride; water oxidation; heterojunction; cobalt hydroxide
资金
- National Basic Research Program of China [2013CB632405]
- National Natural Science Foundation of China [21425309, 21173043]
- State Key Laboratory of NBC Protection for Civilian [SKLNBC2013-04K]
- Specialized Research Fund for the Doctoral Program of Higher Education [20133514110003]
- Department of Education of Fujian Province in the People's Republic of China
Here we report a facile impregnation synthesis of layered Co(OH)(2) deposited with g-C3N4 while the pH value is adjusted by using ammonia solution for photocatalytic water oxidation with UV-vis and visible light illumination. This surface modification not only accelerates the interface transfer rate of charge carriers but also reduces the excessive energy barrier for O-O formation, thus leading to enhanced reaction kinetics for photocatalytic water oxidation. The optimum oxygen evolution rates (OERs) of the Co(OH)(2)/g-C3N4 sample reached 27.4 and 7.1 mu mol h(-1) under UV-vis (lambda > 300 nm) and visible light (lambda > 420 nm) irradiation, which are 5.5 and 7 times faster than those for pristine g-C3N4, respectively. These results underline the possibility for the development of effective, robust, and earth-abundant WOCs for the promotion of water-splitting photocatalysis by sustainable g-C3N4 polymer photocatalysts.
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