Visible‐Light‐Responsive Photoreversible Multi‐Color Switching for Rewritable Light‐Printing and Information Display

Author:

Zhang Yun1,Dou Yao1,Ye Zuyang2,Xue Wenzhao1,Liu Feng1,Yan Mei1,Wang Wenshou1,Yin Yadong2ORCID

Affiliation:

1. School of Chemistry and Chemical Engineering University of Jinan Jinan 250024 P. R. China

2. Department of Chemistry University of California Riverside California 92521 USA

Abstract

AbstractPhotoreversible color switching systems (PCSSs) exhibiting multi‐color responses to visible light are favored for sustainable societal development over those relying on ultraviolet light due to safer operation and better penetration depth. Here, a PCSS capable of multi‐color switching responsive to visible light based on highly photoreductive rutile‐phase Sn‐doped TiO2−x nanoparticles is reported. The Sn‐doping significantly red‐shifts the absorption band of the nanoparticles to the visible region, improving charge separation and transfer efficiencies and introducing Ti3+ species and oxygen vacancies as internal sacrificial electron donors for scavenging photogenerated holes. The resulting Sn‐doped TiO2−x nanoparticles feature exceptional photoreduction ability and activity, thereby enabling photoreversible color switching of various redox dyes operational under visible light illumination. Furthermore, multi‐color switching can be achieved via the color overlay effect by combining different redox dyes in one system, opening the door to many advanced applications, as demonstrated in their successful uses for developing visible‐light‐driven rewritable multi‐color light‐printing systems and visual information displays.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Shandong Province

Taishan Scholar Foundation of Shandong Province

Publisher

Wiley

Subject

Biomaterials,Biotechnology,General Materials Science,General Chemistry

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