Erratum published on 11 March 2016,
see
Molecules 2016, 21(3), 347.
Mechanism of NO Photocatalytic Oxidation on g-C3N4 Was Changed by Pd-QDs Modification
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 & Chemistry, and Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Derek J. McPhee
Molecules 2016, 21(1), 36; https://doi.org/10.3390/molecules21010036
Received: 1 December 2015 / Revised: 16 December 2015 / Accepted: 17 December 2015 / Published: 26 December 2015
(This article belongs to the Special Issue Nano-Structural Photocatalytic Materials: Synthesis, Characterization and Applications)
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.
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Keywords:
quantum dot; g-C3N4; photocatalytic oxidation; NO
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MDPI and ACS Style
Li, Y.; Yang, L.; Dong, G.; Ho, W. Mechanism of NO Photocatalytic Oxidation on g-C3N4 Was Changed by Pd-QDs Modification. Molecules 2016, 21, 36.
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