Issue 41, 2019

Surface-bound sacrificial electron donors in promoting photocatalytic reduction on titania nanocrystals

Abstract

Titania nanocrystals have been investigated for fast color switching through photocatalytic reduction of dyes and hexacyanometalate pigments. Here we reveal that direct binding of sacrificial electron donors (SEDs) to the surface of titania nanocrystals can significantly promote the charge transfer rate by more efficiently scavenging photogenerated holes and releasing more photogenerated electrons for reduction reactions. Using diethylene glycol (DEG) as an example, we show that its binding to the nanoparticle surface, which can be achieved either during or after the nanoparticle formation, greatly enhances the photocatalytic reduction in comparison with the case where free DEG molecules are simply added as external SEDs.

Graphical abstract: Surface-bound sacrificial electron donors in promoting photocatalytic reduction on titania nanocrystals

Supplementary files

Article information

Article type
Paper
Submitted
28 6 2019
Accepted
12 9 2019
First published
12 9 2019

Nanoscale, 2019,11, 19512-19519

Author version available

Surface-bound sacrificial electron donors in promoting photocatalytic reduction on titania nanocrystals

J. Feng, F. Yang, Y. Ye, W. Wang, X. Yao, Q. Fan, L. Liu, R. M. Aleisa, J. Guo and Y. Yin, Nanoscale, 2019, 11, 19512 DOI: 10.1039/C9NR05453G

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