Huang Hao, Hao Qi, Fan Xingce, Luo Zhengwei, Hou Xiangyu, Yang Xiaozhi, Qiu Teng, Chu Paul K
School of Physics, Southeast University, Nanjing 211189, People's Republic of China.
Phys Chem Chem Phys. 2017 Oct 11;19(39):27059-27064. doi: 10.1039/c7cp04196a.
In order to enhance photocatalysis by broadening light harvesting, bundled TiO nanowire bundle arrays are encapsulated with indium tin oxide (ITO) by a self-assembly technique involving anodization, electrochemical etching, and ITO deposition. The plasmonic photocatalyst, which has a multiscale structure with variable nanoscale gaps as well as microscale funnels, shows broadband localized surface plasmon resonance absorption of 84% in the wavelength range between 400 and 2500 nm. The improved photocatalytic efficiency is demonstrated by methyl orange degradation under sunlight illumination. The improvement stems from enhanced light harvesting arising from the localized surface plasmon resonance of the ITO membrane which extends the light response to the visible and NIR regions and excites hot charge carriers.
为了通过拓宽光捕获来增强光催化作用，采用包括阳极氧化、电化学蚀刻和ITO沉积在内的自组装技术，用氧化铟锡（ITO）封装TiO纳米线束阵列。这种等离子体光催化剂具有多尺度结构，有可变的纳米级间隙以及微米级漏斗，在400至2500nm波长范围内显示出84%的宽带局域表面等离子体共振吸收。通过在阳光照射下甲基橙的降解证明了光催化效率的提高。这种提高源于ITO膜的局域表面等离子体共振增强了光捕获，这将光响应扩展到可见光和近红外区域并激发热载流子。
