Mechanism of NO Photocatalytic Oxidation on g-C3N4 Was Changed by Pd-QDs ModificationReportar como inadecuado




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1

Department of Science and Environmental Studies, The Hong Kong Institute of Education, Tai Po, New Territories, Hong Kong, China

2

Laboratory of Environmental Sciences and Technology, Xinjiang Technical Institute of Physics and Chemistry, and Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China





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Authors to whom correspondence should be addressed.



Academic Editor: Derek J. McPhee

Abstract Quantum dot QD sensitization can increase the light absorption and electronic transmission of photocatalysts. However, limited studies have been conducted on the photocatalytic activity of photocatalysts after modification by noble metal QDs. In this study, we developed a simple method for fabricating Pd-QD-modified g-C3N4. Results showed that the modification of Pd-QDs can improve the NO photocatalytic oxidation activity of g-C3N4. Moreover, Pd-QD modification changed the NO oxidation mechanism from the synergistic action of h+ and O2− to the single action of ·OH. We found that the main reason for the mechanism change was that Pd-QD modification changed the molecular oxygen activation pathway from single-electron reduction to two-electron reduction. This study can not only develop a novel strategy for modifying Pd-QDs on the surface of photocatalysts, but also provides insight into the relationship between Pd-QD modification and the NO photocatalytic oxidation activity of semiconductor photocatalysts. View Full-Text

Keywords: quantum dot; g-C3N4; photocatalytic oxidation; NO quantum dot; g-C3N4; photocatalytic oxidation; NO





Autor: Yuhan Li 1, Liping Yang 2, Guohui Dong 2,* and Wingkei Ho 1,*

Fuente: http://mdpi.com/



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