| Ag/TiO2纳米材料的制备和光致变色性能研究 |
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| 引用本文： | 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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| 作者姓名： | 张璐 焦杨 高平安 商毅博 金薇 姚合宝 |
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| 作者单位： | 西北大学 物理学系，陕西 西安 710069 |
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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。
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| 关 键 词： | 光学材料 Ag/TiO2薄膜 光致变色 光催化还原 |
| 收稿时间： | 2011-09-02 |
Preparation and photochromic properties of Ag nanoparticles deposited on TiO2 surfaces |
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| 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 |
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| Authors: | ZHANG Lu JIAO Yang GAO Ping-an SHANG Yi-bo JIN Wei YAO He-bao |
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| Affiliation: | Department of Physics, Northwest University, Xi-an 710069, China |
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| 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. |
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| Keywords: | optical material Ag/TiO2 film photochromism photocatalytic reduction |
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