论文部分内容阅读
合成了不同金属纳米颗粒含量的SnO_2纳米颗粒,并研究了其CO气敏性能。采用溶胶-凝胶法制备初始溶液,通过SEM、TEM、XRD、DLS和分光光度法表征纳米颗粒。在340°C操作温度下,纯SnO_2纳米气敏元件对(20-80)×10~(-6)CO的响应值为4~12.8;在50×10~(-6)CO浓度下,其响应和恢复时间分别为10和14 s。当m(Au)/m(Sn)=3.7663×10~(-4)时,GNP-SnO_2气敏元件具有良好的性能,在260°C优化操作温度下,对(20-80)×10~(-6)CO的响应值为8.3~29.5。
SnO 2 nanoparticles with different content of metal nanoparticles were synthesized and their CO gas sensitivity was studied. The initial solution was prepared by sol-gel method, and the nanoparticles were characterized by SEM, TEM, XRD, DLS and spectrophotometry. At the operating temperature of 340 ° C, the response of pure SnO_2 nano gas sensor to (20-80) × 10 -6 CO was 4 ~ 12.8. Under 50 × 10 -6 CO concentration, Response and recovery times were 10 and 14 s respectively. When the m (Au) / m (Sn) = 3.7663 × 10 ~ (-4), the GNP-SnO_2 gas sensor has good performance. Under the optimum operating temperature of 260 ° C, The response of (-6) CO was 8.3 ~ 29.5.