Raspberry-like SnO 2 hollow nanostructure as a high response sensing material of gas sensor toward n-butanol gas
Raspberry-like SnO 2 hollow nanostructure as a high response sensing material of gas sensor toward n-butanol gas
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DOI：
10.1016/j.jpcs.2018.04.032
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发表时间：
2018-09
影响因子：
4
通讯作者：
Rongjun Zhao;Zhezhe Wang;Yue Yang;Xinxin Xing;Tong Zou;Zidong Wang;Yude Wang
中科院分区：
文献类型：
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作者：
Rongjun Zhao;Zhezhe Wang;Yue Yang;Xinxin Xing;Tong Zou;Zidong Wang;Yude Wang
采用简单的水热法合成了树莓状SnO 2中空纳米结构。采用X射线衍射（XRD）、场发射扫描电子显微镜（FESEM）、透射电子显微镜（TEM）、N2吸附-脱附和X射线光电子能谱（XPS）等分析手段，对样品的组成、微观结构、形貌、比表面积和化学状态进行了研究。表征结果表明，纳米SnO 2颗粒由粒径约为8 nm的SnO 2纳米颗粒组成，粒径约为60 nm。以乌藨子状SnO 2为气敏材料，对正丁醇气体进行了气敏检测。研究了该传感器的气敏特性，包括气体响应、选择性、响应恢复时间、重复性、稳定性和动态响应特性。可以发现，在160 °C的低操作温度下，传感器对100 ppm正丁醇气体的响应值为303.49。检测限低至1 ppm。所有的结果表明，使用乌藨子状的SnO 2的正丁醇气体检测的潜力。同时，还探讨了其可能的形成机理和气敏机理。
The raspberry-like SnO2hollow nanostructure was synthesized by a simple hydrothermal method. The composition, microstructure, morphology, surface area and chemical states are investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), N2adsorption-desorption and X-ray photoelectron spectroscopy (XPS), respectively. The characterization results show that the raspberry-like SnO2with a diameter of about 60 nm is composed of numerous SnO2nanoparticles with grain size about 8 nm. The raspberry-like SnO2was used as sensing material for gas sensor to detect n-butanol gas. The gas-sensing properties including gas response, selectivity, response-recovery time, repeatability, stability and dynamic response character were investigated carefully. It can be found that the response value of the sensor towards 100 ppm n-butanol gas was 303.49 at the low operating temperature of 160 °C. And the detection limit as low as 1 ppm. All results demonstrate the potential of using raspberry-like SnO2for n-butanol gas detection. At the same time, the possible formation mechanism and gas-sensing mechanism were also discussed.