(1. 武漢理工大學 理學院，武漢 430070； 2. 武漢理工大學 材料科學與工程學院，硅酸鹽建筑材料國家重點實驗室，武漢 430070)
摘 要: 針對MoO3氣敏材料工作溫度較高(300~500 ℃)、對低濃度氣體檢測能力有限等問題，采用水熱法制備V摻雜MoO3納米帶材料并組裝成氣敏元件，測試測試并探究不同V摻雜量對乙醇氣敏性能的影響。結果表明：當前軀體中n(V):n(Mo)為1:10時，氣敏元件對乙醇氣敏性能最佳。V摻雜MoO3納米帶的最佳工作溫度相比于純MoO3納米帶降低約80 ℃，對1000×10-6(體積分數)乙醇響應值為基于純MoO3納米帶元件的5.2倍，說明V摻雜可以有效降低MoO3材料的乙醇檢測溫度，并顯著提高氣敏響應值。
關鍵字: 氣體傳感器；MoO3納米帶；V摻雜；響應值
（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
