光谱学与光谱分析, 2023, 43 (4): 1112, 网络出版: 2023-05-03  

TiO2-Ag纳米复合材料的制备及其光电催化性能研究

Preparation and Photoelectrocatalytic Properties Study of TiO2-Ag Nanocomposites
作者单位
苏州大学材料与化学化工学部, 江苏 苏州 215123
摘要
载流子在等离激元金属纳米粒子上的快速复合, 导致传统的光电催化剂效率显著降低, 通过金属和半导体的复合可实现热电子和空穴的分离以提升光电催化效率。 采用Ag纳米粒子与半导体TiO2纳米粒子复合提高其光电催化活性, 并探索了催化活性提升的机理, 研究了TiO2-Ag纳米复合材料之间空间电荷区能带弯曲以及内置电场的作用, 为设计高性能SPR光电催化剂提供理论和实验依据。 以对氨基苯硫酚(PATP)及对硝基苯硫酚(PNTP)的光电催化偶联反应为探针, 研究了TiO2-Ag纳米复合材料的催化性能。 结果表明TiO2的引入提高了Ag的SPR催化活性, 其主要原因是TiO2的引入可提高TiO2-Ag间电子和空穴的分离效率。
Abstract
The rapid recombination of carriers on plasmon metal nanoparticles significantly decreases the efficiency of traditional photocatalysts. The separation of hot electrons and holes can be achieved by recombining metal and semiconductors, improving the efficiency of photocatalysis. This paper combined Ag and TiO2 nanoparticles to improve the photocatalytic activity. The enhanced mechanism of the catalytic activity was explored. The effect of energy band bending in the space charge region between TiO2-Ag nanocomposites and the built-in electric field was studied, which provided a theoretical and experimental basis for designing high-performance SPR photocatalysts. Furthermore, the photocatalysis coupling reaction of PATP and PNTP was employed to study the catalytic performance of TiO2-Ag nanocomposites. The results reveal that the introduction of TiO2 improves the SPR catalytic activity of Ag. The main reason is that introducing TiO2 can improve the separation efficiency of electrons and holes between TiO2 and Ag.

陆燕华, 徐敏敏, 姚建林. TiO2-Ag纳米复合材料的制备及其光电催化性能研究[J]. 光谱学与光谱分析, 2023, 43(4): 1112. LU Yan-hua, XU Min-min, YAO Jian-lin. Preparation and Photoelectrocatalytic Properties Study of TiO2-Ag Nanocomposites[J]. Spectroscopy and Spectral Analysis, 2023, 43(4): 1112.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!