TiO2 nanotubular arrays loaded with Ni(OH)2: naked-eye visible photoswitchable color change induced by oxidative energy storage†
Abstract
Naked-eye visible photoswitchable color change is achieved by storage of ultraviolet-induced oxidative energy (photogenerated holes) from TiO2 nanotubular arrays in the Ni(OH)2 layer. The stored oxidative energy can be taken out using reducing agents, which results in a reversible color switch.