摘要
采用水热法制备了不同Sb掺杂量的TiO_2微球,并用XRD和FE-SEM对样品进行表征。XRD结果表明,未掺杂和Sb掺杂样品均为纯金红石相;FE-SEM表明纯TiO_2微球和Sb掺杂TiO_2微球分别以纳米颗粒、纳米棒为组成单元。气敏测试结果表明,Sb掺杂使金红石TiO_2气敏元件的最佳工作温度由掺杂前的350℃降低至掺杂后的200℃,其中Sb掺杂量为7.5%的TiO_2气敏元件的灵敏度最高,在200℃下对100×10-6C2H5OH的灵敏度为11.82,响应时间为28 s,恢复时间为6 s,检测下限可达到10×10-6。
Sb-doped rutile TiO2 microspheres with varied dopant concentrations were synthesized through hydrothermal method under acid condition. Its component, morphology were investigated by X-ray diffraction （XRD）, Field Emission Scanning electron microscope（FE-SEM）. Results showed that all of the samples are rutile. The FE-SEM patterns show that the Sb-deposed TiO2 microspheres are composed of nanorods with alengh of aboutl m instead of nanoparticles. Sb doping decreased the optimal working temperature from 350 ℃ to 200℃. When the doping amount is 7.5% ,its gas-sensitive properties was best. The 7.5% Sb-doped TiO2 show the highest response with a value of 11.82 under 200 ℃ condition, and the response time was 28 s, recovery time was 6 s. The detection limit of C2H OH was 10 × 10^-6.
出处
《湖南有色金属》
CAS
2016年第4期51-53,76,共4页
Hunan Nonferrous Metals
基金
国家自然科学基金项目(51102285)
