期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 34, 页码 30673-30681出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b04302
关键词
CO2 photoreduction; heterojunction; graphitic carbon nitride; NH2-UiO-66; chemical bonding
资金
- Key Project of Chinese National Programs for Research and Development [2016YFC0203800]
- National Natural Science Foundation of China [51578288]
- Industry-Academia Cooperation Innovation Fund Projects of Jiangsu Province [BY2016004-09]
- Jiangsu Province Scientific and Technological Achievements into a Special Fund Project [BA2016055, BA2017095]
- Top-notch Academic Programs Project of Jiangsu Higher Education Institutions
- Priority Academic Program Development of Jiangsu Higher Education Institutions
Constructing heterostructured photocatalysts is an efficient method to improve photocatalytic carbon dioxide (CO2) reduction. Herein, holey g-C3N4 (HGN) with rich amino groups (-NHx) was hybridized with NH2-UiO-66 (NUZ) via a facile in situ growth method. NUZ nanocrystals were anchored on HGN via NHx-Zr-O chemical bonding, leading to the uniform dispersion and avoiding the leaching of NUZ, thus showing excellent stability in photocatalysis. The chemically bonded interfacial charge transfer effect originated from the NHx-Zr-O formation efficiently accelerated the separation and migration of charge carriers, improving the photoactivity. Benefiting from the NHx-Zr-O formation, the optimized NUZ/HGN-35% heterojunctions exhibited outstanding activity in the photoreduction of CO2 to CO (31.6 mu mol g(-1) h(-1)), which was about 2 and 3 times higher than that of pure NUZ and HGN under visible-light irradiation. This study is expected to provide useful insights for constructing composites with strong interaction for CO2 reduction, H-2 production, and N-2 reduction.
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