Preparation of Cu2+ Doped SnO2 Nano-powders and Characteristic Analysis of Gas Sensing Elements
Cu2+ doped SnO2 nano-powders were prepared by homogenous co-precipitation method with different molar rates of Cu2+/Sn4+. The Cu2+ doped SnO2 grains which have rutile structure about 80nm and well dispersed. The phase transformation, structure and shape of samples were analyzed according to TG-DSC, XRD and SEM. The resistance-temperature characters and sensitivities in H2 atmosphere at 75℃ of the sensors were tested and analyzed. As a result, doping Cu2+ influences the crystal behavior and restrains the growth of grains. And it decreases the crystal size and crystal degree of SnO2. At the same times, doping Cu2+ brings acceptor band in the structure of SnO2, increases the resistance of n-type SnO2 in the air atmosphere and improves the sensitivities of sensors for H2. The sensitivity of sensors for H2 was the best while Cu2+/Sn4+ was about 0.01.
SnO2 doping gas-sensing H2
孙红娟 彭同江 樊亮 刘海峰
西南科技大学矿物材料与应用研究所孙红娟,四川绵阳 621010
国际会议
成都
英文
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）