Photocatalytic Self-Doped SnO2-x Nanocrystals Drive Visible-Light-Responsive Color Switching

Angewandte Chemie
Dan HanWenshou Wang

Abstract

Visible-light-responsive reversible color-switching systems are attractive to many applications because visible light has superior penetration and causes far less damage to organic molecules than UV. Herein, we report that self-doping of SnO2-x nanocrystals with Sn2+ red-shifts their absorption to the visible region and simultaneously produces oxygen vacancies, which can effectively scavenge photogenerated holes and thus enable the color switching of redox dyes using visible light. Wavelength-selective switching can also be achieved by coupling the photocatalytic activity of the SnO2-x NCs with the color-switching kinetics of different redox dyes. The fast light response enables the further fabrication of a solid film that can be repeatedly written on using a visible laser pen or projection printing through a photomask. This discovery represents a big step forward towards practical applications, especially in areas in which safety issues and photodamage by UV light are of concern.

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Citations

Jan 24, 2018·Advanced Materials·Mohammed Iqbal KhaziJong-Man Kim
Jul 25, 2018·Advanced Materials·Wenjing XuYadong Yin
Jan 29, 2019·Angewandte Chemie·Shuning CaiWenjing Hong
Feb 19, 2019·Advanced Materials·Zhiwei Li, Yadong Yin
Jun 18, 2019·Chemical Communications : Chem Comm·Di ZuHui Wu
Aug 15, 2019·Angewandte Chemie·Zaiyong JiangGeoffrey A Ozin
Sep 1, 2019·Nanoscale Research Letters·Yingnan DuanMengkui Tian
Feb 26, 2021·Nature·Jason J YooJangwon Seo
Mar 20, 2019·ACS Applied Materials & Interfaces·Daniel K MachariaMeifang Zhu
Mar 12, 2020·ACS Applied Materials & Interfaces·Xin WangBin Dong
May 14, 2019·ACS Applied Materials & Interfaces·Zhonghui HanGang Chen

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