Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 202, Issue -, Pages 430-437Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2016.09.051
Keywords
Contact system; g-C3N4; Au nanoparticles; Concerted catalysis; Induced charge-transfer effect
Funding
- NNSF of China [51472120]
- China Postdoctoral Science Foundation [2014M561651, 2015T80554]
- Jiangsu Planned Projects for Postdoctoral Research Funds [1401003B]
- Fundamental Research Funds for the Central Universities [20915011311, 30916014103]
- Jiangsu Key Laboratory for Environment Functional Materials [SJHG1303]
- Zijin Intelligent Program of NUST
- PAPD of Jiangsu
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We report a facile one-step strategy to fabricate an Auig-C3N4 contact system with different Au contents. Morphology observation shows that Au nanoparticles with an average diameter of 2.6 nm are firmly anchored on the surface of two-dimensional g-C3N4 sheets. It is found that the Au/g-C3N4 contact system exhibits an unusual bi-functionality of catalytic and visible-light-driven photocatalytic activities, thus the hydrogenation reduction of nitrophenol to aminophenol can be rapidly achieved under concerted catalysis by the system. Among the Au/g-C3N4 contact systems studied, the Au/g-C3N4-6 exhibits the highest rate constant of 5.9362 x10(-3) s(-1) in the dark and 7.9895 x 10(-3) s(-1) under visible light irradiation for the reduction of p-nitrophenol to p-aminophenol, which is impressively higher than that pure Au nanoparticles or recently reported Au-based nanocatalysts. Such a concerted catalysis can be attributed to the negative shift in Fermi level of Au caused by the induced charge-transfer effect as a result of the strong interaction between Au nanoparticles and g-C3N4. (C) 2016 Elsevier B.V. All rights reserved.
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