Issue 87, 2016, Issue in Progress

Re-excitation of localized electrons in SnO2 quantum dots for enhanced water photolysis activity

Abstract

Trapping and further localization of photo-generated carriers by defects in a photocatalyst are crucial obstacles for enhancing the efficiency of hydrogen generation from water photolysis. In this paper, we reported a re-excitation mechanism of localized electrons assisted by infrared light for improving photocatalytic activity. Increasing hydrogen production is demonstrated when introducing infrared light for SnO2 quantum dots at a grain size smaller than twice its Debye length and supported on g-C3N4. Comparatively, in absence of infrared light, rich oxygen vacancies in these SnO2 quantum dots reduced the photocatalytic activity. The re-excitation of localized electrons would provide a viable approach to utilize electrons more efficiently in the photocatalytic or other catalytic fields.

Graphical abstract: Re-excitation of localized electrons in SnO2 quantum dots for enhanced water photolysis activity

Supplementary files

Article information

Article type
Paper
Submitted
20 Jun 2016
Accepted
14 Aug 2016
First published
16 Aug 2016

RSC Adv., 2016,6, 83848-83855

Re-excitation of localized electrons in SnO2 quantum dots for enhanced water photolysis activity

X. Chen, L. Li, Y. Zhang, Y. Xu and G. Li, RSC Adv., 2016, 6, 83848 DOI: 10.1039/C6RA15932J

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