(1. 武汉理工大学 理学院，武汉 430070； 2. 武汉理工大学 材料科学与工程学院，硅酸盐建筑材料国家重点实验室，武汉 430070)
摘 要: 针对MoO3气敏材料工作温度较高(300~500 ℃)、对低浓度气体检测能力有限等问题，采用水热法制备V掺杂MoO3纳米带材料并组装成气敏元件，测试测试并探究不同V掺杂量对乙醇气敏性能的影响。结果表明：当前躯体中n(V):n(Mo)为1:10时，气敏元件对乙醇气敏性能最佳。V掺杂MoO3纳米带的最佳工作温度相比于纯MoO3纳米带降低约80 ℃，对1000×10-6(体积分数)乙醇响应值为基于纯MoO3纳米带元件的5.2倍，说明V掺杂可以有效降低MoO3材料的乙醇检测温度，并显著提高气敏响应值。
关键字: 气体传感器；MoO3纳米带；V掺杂；响应值
（1. School of Science, Wuhan University of Technology, Wuhan 430070, China; 2. State Key Laboratory of Silicate Materials for Architectures, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China）
Abstract:V doped MoO3 nanobelts were prepared by a hydrothermal method, aiming at solving their intrinsic problems of high operating temperature (300-500 ℃) and poor detecting ability to low concentrations of gas of MoO3. Gas sensors based on V doped MoO3 nanobelts were fabricated and the influence of V doping amounts on the ethanol gas sensing properties of the gas sensors was studied. The results show that the most appropriate ratio of n(V):n(Mo) is 1:10 in the precursor, and the optimum operating temperature is 80 ℃ lower than that of the sensors based on pure MoO3 nanobelts. In addition, the response value of the sensors based on V doped MoO3 nanobelts to 1000×10-6 (volume fraction) ethanol gas is 5.2 times higher than that of the sensors based on pure MoO3 nanobelts. All the above results imply that V doping can effectively decrease the operating temperature as well as improve the response value to ethanol gas.
Key words: gas sensor; MoO3 nanobelt; V doping; response value
