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以硝酸铟为原料,采用水热法制备氧化钒(V2O5)掺杂的氧化铟(In2O3)纳米复合材料。利用X射线衍射(XRD)和比表面测试仪对材料的物相结构和比表面积(BET)进行了表征测试。结果表明:制备的In2O3材料都为立方晶相,具有较大的比表面积。V2O5的掺杂提高了对乙醇、苯的灵敏度。复合材料中掺杂V2O50.5%(wt,质量分数)的In2O3气敏元件对乙醇具有较好的气敏性能,3.0V加热电压下对5×10-6乙醇的灵敏度达8.024,响应恢复时间短。
In this paper, indium oxide (V2O5) doped indium oxide (In2O3) nanocomposite was prepared by hydrothermal method using indium nitrate as raw material. The phase structure and specific surface area (BET) of the materials were characterized by X-ray diffraction (XRD) and specific surface area analyzer. The results show that the prepared In2O3 materials are all cubic and have large specific surface area. The doping of V2O5 improves the sensitivity to ethanol and benzene. The In2O3 gas sensor doped with 50% (wt) V2O in composite material has good gas sensitivity to ethanol, the sensitivity to 5 × 10-6 ethanol is 8.024 at 3.0V heating voltage, and the response recovery time short.