| 引用本文: | 田江丽,王兢,杜海英,于鹏,李晓干.花状SnO2的制备及其气敏特性的研究[J].材料科学与工艺,2014,22(4):91-95.DOI:10.11951/j.issn.1005-0299.20140416. |
| TIAN Jiangli,WANG Jing,DU Haiying,YU Peng,LI Xiaogan.Synthesis and gas sensing properties of flower-like SnO2[J].Materials Science and Technology,2014,22(4):91-95.DOI:10.11951/j.issn.1005-0299.20140416. |
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| 摘要: |
| 以乙二醇(C2H6O2)为有机溶剂,采用溶剂热法制备了花状SnO2纳米材料,并将制备的SnO2制成旁热式气敏元件.通过XRD,SEM等测试手段对SnO2纳米材料进行了表征,并初步分析了气敏元件对丙酮的敏感机理.制备的SnO2材料是由粒径约为10 nm的颗粒有规则的堆叠而成的直径约为3~4 μm的花瓣清晰的多孔分级花状结构.研究发现,气敏元件对丙酮气体有很好的响应灵敏度.在最佳工作温度(350 ℃)时,检测的丙酮体积分数最低为1×10-6.对100 ppm丙酮的响应及恢复时间分别为40 和50 s.且气敏元件对丙酮气体的响应灵敏度远高于对苯、甲苯、甲醇、甲醛、氨等气体的响应灵敏度. |
| 关键词: 气敏元件 SnO2 溶剂热法 分级结构 丙酮 |
| DOI：10.11951/j.issn.1005-0299.20140416 |
| 分类号:TB34 |
| 基金项目:国家自然科学基金资助项目(61176068；61131004； 61001054). |
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| Synthesis and gas sensing properties of flower-like SnO2 |
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TIAN Jiangli, WANG Jing, DU Haiying, YU Peng, LI Xiaogan
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(School of Electronic Science and Technology, Dalian University of Technology, Dalian 116023, China)
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| Abstract: |
| In this paper, a flower-like SnO2 nanomaterials were synthesized by using a solvothermal method, and the organic solvent was ethylene glycol (C2H6O2). The structure of SnO2 was characterized by X-ray diffraction (XRD) and field emission scanning electron microscope (FE-SEM). The diameter of the “flower” is about 3~4 μm, and the petals are composed of nanoparticals with a size around 10 nm, which indicates a porous and hierachical structure. The sensors fabricated by flower-like SnO2 exhibited good sensing properties to acetone at operating temperature of 350 ℃, and the minimum test concentration was volume fraction 1×10-6. The response time and recovery time of the sensors to 100 ppm acetone were about 40 s and 50 s, respectively. The response value of the sensor to acetone is much higher than other possible interference gases such as benzene, toluene, methanol, formaldehyde, ammonia etc. |
| Key words: gas sensor SnO2 solvothermal hierarchical structure acetone |
