引用本文:
惠春, 徐爱兰. (Sn,Sb)O2-x基纳米结构厚膜材料气敏特性及机理[J]. 物理化学学报,
2001, 17(09): 832-835.
doi:
10.3866/PKU.WHXB20010915
Citation: Hui Chun, Xu Ai-Lan. Properties and Mechanism of Nanostructure Thick Film Materials Based on ( Sn,Sb )O2-x[J]. Acta Physico-Chimica Sinica, 2001, 17(09): 832-835. doi: 10.3866/PKU.WHXB20010915
Citation: Hui Chun, Xu Ai-Lan. Properties and Mechanism of Nanostructure Thick Film Materials Based on ( Sn,Sb )O2-x[J]. Acta Physico-Chimica Sinica, 2001, 17(09): 832-835. doi: 10.3866/PKU.WHXB20010915
(Sn,Sb)O2-x基纳米结构厚膜材料气敏特性及机理
摘要:
对采用水热合成技术所形成的纳米(Sn,Sb)O2x晶粒结构、厚膜材料的气敏特性及其机理进行了研究,并采用XRD、TEM手段对纳米尺度的（Sn、Sb)O2x晶粒的结构与表面效应及晶粒形态进行了表征.结果表明，当掺杂Sb5＋的浓度（摩尔分数xSb5＋)为（2.9～5.8)×10－6时，（Sn、Sb)O2x纳米晶粒表面的电子缺陷浓度增大，增强了对气体的吸附能力，从而提高了对可燃性气体的灵敏度.同时可使晶粒保持短柱状的形态特征，对其灵敏度有一定的控制作用.
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关键词:
- SnO2-x;纳米结构;气敏特性;机理
English
Properties and Mechanism of Nanostructure Thick Film Materials Based on ( Sn,Sb )O2-x
Abstract:
The influence of Sb5＋ ions on SnO2x crystallinity and gassensing properties of the sensors based on the SnO2x powders prepared by hydrothemal synthesis technique was investigated by XRD and TEM.The results show that the doping of Sb5＋ ions in the ranges of (2.9～5.8×10－6) makes the grains of the SnO2x a short column in shape and plays an important role in decreasing the resistance values in air (Ra) for the sensor and controlling the sensitivity to CH4,CO,C2H5OH and H2.Finally,the surface electronic defect effect and the size effect of SnO2x crystallite in nanometer level were discussed to understand the gas sensing mechanism of sensors based on the(Sn,Sb)O2x nanostructure thick film materials.
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