Mechanism for acetone sensing property of Pd-loaded SnO2 nanofibers prepared by electrospinning: Fermi-level effects
Mechanism for acetone sensing property of Pd-loaded SnO2 nanofibers prepared by electrospinning: Fermi-level effects
复制标题
静电纺丝制备的负载 Pd SnO2 纳米纤维的丙酮传感性能机制：费米能级效应
DOI：
10.1007/s10853-015-8836-0
复制
发表时间：
2015-03-01
影响因子：
4.5
通讯作者：
Li, Xiaogan
中科院分区：
文献类型：
--
作者：
Tang, Wei;Wang, Jing;Li, Xiaogan
采用静电纺丝法合成了负载Pd浓度为1.0 ~ 2.0 mol%的未掺杂和负载Pd的SnO2纳米纤维，并进行了适当的退火处理。采用热重分析、差示扫描量热法、x射线衍射、傅里叶变换红外、能量色散x射线能谱、扫描电镜、透射电镜和N2物理吸附等手段对纳米纤维的形貌和纳米晶体结构进行了表征。比较了未掺杂和负载pd的SnO2纳米纤维的传感性能。气敏实验结果表明，在275℃的低温下，负载1.5% mol% pd的SnO2纳米纤维对丙酮的响应最好。负载Pd的SnO2纳米纤维的丙酮响应增强可能与Pd催化剂的“费米效应”有关。
Undoped and Pd-loaded SnO2 nanofibers with various Pd loading concentrations from 1.0 to 2.0 mol% had been synthesized by electrospinning with appropriate annealing process subsequently. The morphologies and nanocrystalline structures of the nanofibers were characterized by thermogravimetric analysis–differential scanning calorimetry, X-ray diffraction, Fourier transform infrared, energy dispersive X-ray spectroscopy, scanning electron microscopy, transmission electron microscopy, and N2 physical adsorption. The sensing properties of undoped and Pd-loaded SnO2 nanofibers were compared. The gas sensing results showed that 1.5 mol% Pd-loaded SnO2 nanofibers got a best response to acetone at lower operating temperature of 275 °C among all the Pd-loaded SnO2 nanofibers. The enhanced acetone response of Pd-loaded SnO2 nanofibers may be correlated with the “Fermi-level effects” of Pd catalysts.