摘要
采用水热法合成了Ni掺杂α-Fe2O3纳米材料,通过XRD、TEM等手段对产物的物相、形貌等进行了表征,并探讨了材料的气敏性能。结果表明:工作温度为300℃时,元件对50×10–6的H2S气体的灵敏度可达122.8,H2S气体对其他几种被测气体的选择性系数均在9以上,响应恢复时间分别为5s和14s。最后提出了Ni掺杂对α-Fe2O3气敏元件性能影响的机理。
Ni-doped α-Fe2O3 nanomaterials were synthesized by hydrothermal method and its crystal structure and morphology were characterized by XRD and TEM. The gas-sensing properties of the materials were researched. The results indicate that the sensitivity of sensor to 50×10^-6 H2S can reach 122.8 at working temperature of 300 ℃. The selectivity coefficients of H2S gas to other detected gases are more than 9, response and recovery time are 5 and 14 s, respectively. Finally, a possible mechanism for the influence of Ni-doping on the sensing properties of α-Fe2O3 sensors is proposed.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2009年第1期23-25,共3页
Electronic Components And Materials
基金
河南省教育厅自然科学基金资助项目(No.2008B430011)
关键词
无机非金属材料
Ni掺杂α-Fe2O3
气敏性能
水热法
制备
non-metallic inorganic material
Ni-dopod α-Fe2O3
gas-sensing properties
hydrothermal method
preparation
