纳米结构
热液循环
选择性
检出限
材料科学
比表面积
纳米材料
分析化学(期刊)
电导率
电解质
纳米技术
化学工程
化学
色谱法
工程类
有机化学
物理化学
电极
催化作用
作者
Junqiang Wang,Zhijie Li,Sa Zhang,Shengnan Yan,Baobao Cao,Zhiguo Wang,Yong Qing Fu
标识
DOI:10.1016/j.snb.2017.08.149
摘要
The silica modified CeO2 gas sensing nanomaterials are synthesized using a sol-hydrothermal route. The 8%silica-CeO2 has larger specific surface areas of 83.75 m2/g and smaller crystalline size of 11.5 nm than pure CeO2, respectively. Compared to pure CeO2, the 8%silica-CeO2 based gas sensor exhibits significant enhancement NH3 gas-sensing performance. At room temperature, it shows much better gas response of 3244% to 80 ppm of NH3 gas and lower detection limit (0.5 ppm) towards NH3 gas. It is also found that the gas response of the NH3 gas sensors increases linearly with the increase of NH3 gas concentration. Moreover, the NH3 gas sensor have good reversibility, stability and selectivity. The reason of enhanced NH3 gas-sensing performance is not only because of the increased specific surface areas, but also due to the electrolytic conductivity of NH4+ and OH− on the surface.
科研通智能强力驱动
Strongly Powered by AbleSci AI