紫外光和可见光作用下含金纳米颗粒二氧化钛的远紫外光谱变化

Far-ultraviolet spectral changes of titanium dioxide with gold nanoparticles by ultraviolet and visible light.

作者信息

Tanabe Ichiro, Kurawaki Yuji

机构信息

Graduate School of Engineering Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 5608531, Japan.

School of Science and Technology, Kwansei Gakuin University, Gakuen 2-1, Sanda, Hyogo 6691337, Japan.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2018 May 15;197:103-106. doi: 10.1016/j.saa.2017.11.011. Epub 2017 Nov 7.

DOI:10.1016/j.saa.2017.11.011

PMID:29133130

Abstract

Attenuated total reflectance spectra including the far-ultraviolet (FUV, ≤200nm) region of titanium dioxide (TiO) with and without gold (Au) nanoparticles were measured. A newly developed external light-irradiation system enabled to observe spectral changes of TiO with Au nanoparticles upon light irradiations. Absorption in the FUV region decreased and increased by the irradiation with ultraviolet and visible light, respectively. These spectral changes may reflect photo-induced electron transfer from TiO to Au nanoparticles under ultraviolet light and from Au nanoparticles to TiO under visible light, respectively.

摘要

测量了包含有和没有金（Au）纳米颗粒的二氧化钛（TiO₂）远紫外（FUV，≤200nm）区域的衰减全反射光谱。一个新开发的外部光照射系统能够观察到有金纳米颗粒的TiO₂在光照射时的光谱变化。FUV区域的吸收分别因紫外光和可见光照射而降低和增加。这些光谱变化可能分别反映了在紫外光下光致电子从TiO₂转移到金纳米颗粒以及在可见光下从金纳米颗粒转移到TiO₂。