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UV Enhancement of the Gas Sensing Properties of Nano-TiO2

机译：紫外线增强纳米TiO2的气敏特性

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In this study, the gas-sensing properties of nanocrystalline TiO2 are enhanced by submitting the sensor system to UV light irradiation. TiO2 gas sensing material based on nanosized particles is produced by gas condensation method. The crystal structure and ceramic microstructure of the powders are determined by TEM and XRD. Structural and morphological studies as well as UV irradiation are carried out in order to investigate their influence on the sensing properties of TiO2 sensor. The sensitivity of the TiO2 sensor is affected by the presence of O2- or O- on the TiO2 surface that is enhanced by the photocatalytic effect. Gaseous CO is detected under UV light illumination. The results indicate that the sensing properties of TiO2 are affected by the wavelength and the intensity of the UV light. The photocatalytic activity enhances the sensitivity of the nano-TiO2 sensors by more than 30 times.
机译：在这项研究中，通过使传感器系统经受紫外线照射，可以增强纳米晶TiO2的气敏特性。基于纳米粒子的TiO2气敏材料是通过气体冷凝法制备的。粉末的晶体结构和陶瓷微结构通过TEM和XRD确定。为了研究它们对TiO2传感器的传感特性的影响，进行了结构和形态学研究以及UV辐照。 TiO2传感器的灵敏度受光催化效果增强的TiO2表面上O2-或O-的存在影响。在紫外线照射下检测到气态CO。结果表明，TiO2的传感特性受紫外线的波长和强度的影响。光催化活性将纳米TiO2传感器的灵敏度提高了30倍以上。

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