摘要
以In(NO3)3·4.5H2O为原料,采用室温固相合成法、化学共沉淀法、均匀沉淀法、溶胶-凝胶法、微乳液法、水热法等六种不同方法制备In2O3纳米粉体。通过XRD、SEM、TEM等手段对粉体的物相、形貌、粒度等进行表征。结果表明,室温固相合成法、化学共沉淀法和水热法制备的粉体形貌为棒状,微乳液法、溶胶-凝胶法和均匀沉淀法制备的粉体形貌为粒径非常小的颗粒状。均匀沉淀法制备的In2O3气敏元件对Cl2具有最高的灵敏度,110℃工作温度下对100ppmCl2的灵敏度高达1175,且具有选择性好,响应-恢复时间短等特性。
Using In（ NO3） 3 ·4. 5H2O as raw materials,In2O3 nanopowders was prepared by several methods,including room temperature solid-phase synthesis,chemical co-precipitation method,homogeneous-precipitation method,sol-gel method,microemulsion method and hydrothermal method. Its size,phase and morphology were analyzed by XRD,SEM and TEM. The results show that the morphology of the In2O3 prepared by room temperature solid-phase synthesis,chemical co-precipitation method and hydrothermal method are nanorods,and the morphology prepared by microemulsion method,sol-gel method and homogeneous-precipitation method are small nano particles. The gas-sensing properties of the materials were tested in static state. The results show that the In2O3 nano-powder has high sensitivity to Cl2. The In2O3 nano-powder prepared by homogeneous-precipitation method has a highest sensitivity as high as 1175 to 100 ppm Cl2 at the lower working temperature of 110 ℃. The sensor based on In2O3 also has satisfactory selectivity,quickly response and short recover time.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2010年第4期1002-1007,共6页
Journal of Synthetic Crystals
基金
河南省教育厅自然科学基金(No.2008B43001,No.2008B150012)
河南师范大学青年科学基金(No.525185)
关键词
In2O3纳米粉体
均匀沉淀法
气敏性能
In2O3 nano-powder
homogeneous-precipitation method
gas-sensing properties
