Enhanced gas sensing characteristics of Au-Loaded TiO2 Nanotube Sensors
Enhanced gas sensing characteristics of Au-Loaded TiO2 Nanotube Sensors
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DOI：
10.1165/sl.2011.1412
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发表时间：
2011-12
期刊：
影响因子：
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通讯作者：
M. Seo;M. Yuasa;T. Kida;J. Huh;N. Yamazoe;K. Shimanoe
中科院分区：
文献类型：
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作者：
M. Seo;M. Yuasa;T. Kida;J. Huh;N. Yamazoe;K. Shimanoe
负载贵金属进行，以提高气敏特性的TiO 2纳米管为基础的传感器。采用光化学沉积法，将Au纳米粒子以高分散状态沉积在水热法制备的TiO 2纳米管上。使用由Au负载的（0.5wt%）TiO 2纳米管组成的多孔膜的传感器装置在500 °C下对空气中的10-50 ppm甲苯表现出改善的传感器响应。传感器响应比使用商业TiO 2纳米颗粒（degussa P-25）的传感器高约两倍。结果表明，Au负载是一种非常有效的方法，用于改善在高温下工作的基于TiO 2纳米管的传感器的传感特性。
The loading of noble metals was carried out to enhance the gas sensing characteristics of TiO2 nanotube-based sensors. Using a photochemical deposition method, Au nanoparticles were successfully deposited on TiO2 nanotubes prepared by a hydrothermal method in a highly-dispersed state. The sensor device using a porous film composed of the Au-loaded (0.5 wt%) TiO2 nanotubes exhibited improved sensor responses to 10–50 ppm toluene in air at 500 °C. The sensor response was about two times higher than that of a sensor using commercial TiO2 nanoparticles (degussa P-25). The results demonstrate that the Au loading is a very efficient method for improving the sensing characteristics of TiO2 nanotube-based sensors operative at high temperatures.