Macharia Daniel K, Liu Meng, Gao Yijia, Wen Zeyulong, Feng Qingyang, Chen Zhigang, Yang Xiaoli
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
College of Fashion and Design, Donghua University, Shanghai 201620, China.
J Colloid Interface Sci. 2025 Jan 15;678(Pt B):534-544. doi: 10.1016/j.jcis.2024.08.226. Epub 2024 Sep 7.
Semiconductor/redox-based dual light-induced color switching systems (LCSs) with a visible light response at different wavelengths are highly sought after for efficient redox reactions. In this work, Sn self-doped SnO has been designed as nanophotocatalysts for preparing visible light-responsive inks/fabrics with single/multi-color abilities. The self-doping of SnO nanoparticles results in the formation of oxygen vacancies due to charge compensation effects leading to electron-driven photoreduction and photooxidation of LSC inks. By mixing SnO nanoparticles dispersions with specific redox-sensitive dyes can lead to the creation of well-designed sets of visible light-responsive semiconductor-driven LCS systems with both single-color (RGB) and multi-color (violet and green) changes. The exposure of LCS inks to green (550 nm) light culminates in the rapid photoreduction of the inks to decolorized state, while red (660 nm) light initiates the photooxidation in air. The combination of the LCS inks with -OH-rich polymers can be coated on the hydrophobic surface of the layered fabric to produce photo-responsive fabrics with single/multi-color response. The interaction of green light with the semiconductor-driven LCS systems allows the remote photo-printing of different images/letters on the LCS fabrics. Spontaneous erasure can be achieved by red light with high stability and repeatability (>35 cycles). The research in this paper provides new perspectives and insights for the development of new color-changing materials with potential applications as light-activated sensors and display units.
具有不同波长可见光响应的基于半导体/氧化还原的双光诱导颜色切换系统（LCSs）对于高效氧化还原反应而言备受追捧。在这项工作中，Sn自掺杂的SnO已被设计为纳米光催化剂，用于制备具有单/多色能力的可见光响应油墨/织物。SnO纳米颗粒的自掺杂由于电荷补偿效应导致氧空位的形成，进而引发LSC油墨的电子驱动光还原和光氧化。通过将SnO纳米颗粒分散体与特定的氧化还原敏感染料混合，可创建精心设计的可见光响应半导体驱动LCS系统，实现单色（RGB）和多色（紫色和绿色）变化。LCS油墨暴露于绿色（550 nm）光下会迅速光还原为脱色状态，而红色（660 nm）光则在空气中引发光氧化。LCS油墨与富含-OH的聚合物结合后可涂覆在层状织物的疏水表面上，以生产具有单/多色响应的光响应织物。绿光与半导体驱动的LCS系统相互作用，可在LCS织物上远程光打印不同的图像/字母。通过红光可实现具有高稳定性和可重复性（>35次循环）的自发擦除。本文的研究为开发具有潜在应用价值的新型变色材料提供了新的视角和见解，这些材料可作为光激活传感器和显示单元。
