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Ag/TiO2纳米材料的制备和光致变色性能研究

Preparation and photochromic properties of Ag nanoparticles deposited on TiO2 surfaces

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摘要

采用光催化还原法在不同温度热处理的TiO2薄膜表面沉积Ag纳米颗粒,制备了Ag/TiO2纳米薄膜材料。通过UV-Vis吸收光谱表征对比了不同温度热处理的TiO2对Ag粒子光催化沉积的影响,发现500℃退火处理TiO2薄膜较利于Ag纳米粒子的光催化沉积;在650 nm红色激光照射下,500℃退火处理的Ag/TiO2样品具有明显的光致变色现象,对此变色过程中涉及的机理进行了讨论,且发现随着Ag纳米颗粒光催化沉积时间的增长,Ag/TiO2薄膜光致变色的响应速率提高,但Ag纳米颗粒过多会抑制Ag/TiO2薄膜的变色响应速率。

Abstract

Ag/TiO2 film was prepared by photochemical reduction method with depositing Ag nanoparticles on TiO2 surfaces. The influence of TiO2 annealed at different temperatures on the photocatalytic deposition of Ag nanoparticles was analyzed by ultraviolet-visible (UV-Vis) absorption spectra, and TiO2 films annealed at 500℃ were helpful to the reduction of Ag nanoparticles. By the 650 nm red laser irradiation, Ag/TiO2 films annealed at 500℃ exhibited photochromic properties well. The mechanisms of photochromism were studied, and we found the response rate of photochromism of Ag/TiO2 films improved with the increase of Ag depositing time, but excess Ag nanoparticles inhibited the photochromic response rate of the Ag/TiO2 thin film.

Newport宣传-MKS新实验室计划
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中图分类号:TN204;TQ034

DOI:10.5768/jao201233.0205002

收稿日期:2011-09-02

修改稿日期:2011-09-23

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作者单位    点击查看

张璐:西北大学 物理学系,陕西 西安 710069
焦杨:西北大学 物理学系,陕西 西安 710069
高平安:西北大学 物理学系,陕西 西安 710069
商毅博:西北大学 物理学系,陕西 西安 710069
金薇:西北大学 物理学系,陕西 西安 710069
姚合宝:西北大学 物理学系,陕西 西安 710069

联系人作者:张璐(15809254579@163.com)

备注:张璐(1986-),女,陕西渭南人,硕士研究生,主要从事二氧化钛纳米复合材料的制备和性质研究工作。

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引用该论文

ZHANG Lu,JIAO Yang,GAO Ping-an,SHANG Yi-bo,JIN Wei,YAO He-bao. Preparation and photochromic properties of Ag nanoparticles deposited on TiO2 surfaces[J]. Journal of Applied Optics, 2012, 33(2): 360-364

张璐,焦杨,高平安,商毅博,金薇,姚合宝. Ag/TiO2纳米材料的制备和光致变色性能研究[J]. 应用光学, 2012, 33(2): 360-364

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