深圳大学学报理工版

以二水合二氯亚锡为原料,无任何添加剂,通过微波水热法快速合成氧化锡(SnO2)纳米棒.使用X射线衍射和扫描电子显微镜对样品的结构、形貌进行表征.研究发现,制备的SnO2纳米棒颗粒尺寸均一,分散性较好,纳米棒的表面布满颗粒状的突起.以制得的SnO2纳米棒构筑旁热式气敏元件,采用静态配气法测试了气敏元件对乙醇、甲醇、丙酮和氨气等气体的敏感性能.结果表明,该气敏元件对乙醇具有灵敏度高、检测下限低、选择性好、响应和恢复迅速等优点.

Tin dioxide nanorods were successfully synthesized by a microwave-assisted hydrothermal method with Tin(II)chloride dehydrate as the raw material without any additives. The structure and morphology of the samples were characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM). The result indicates that the particle size of the SnO2 nanorod is uniform and relatively dispersive. It is found that the surface of nanorods is filled with irregular protuberances. The sensibilities of such a SnO2 sensor to ethanol, methanol, acetone, ammonia, and so on were measured by the static volumetric method. The sensor exhibits high sensitivity, low detection limit, excellent selectivity, fast response and recovery characteristics to ethanol.

引言
1 实验
2 结果与讨论
3 结语

图1 SnO2纳米棒的XRD图谱<br/>Fig.1 (Color online)XRD pattern for the SnO2 nanorods

图1 SnO2纳米棒的XRD图谱
Fig.1 (Color online)XRD pattern for the SnO2 nanorods

图2 不同制备方法SnO2 的SEM照片<br/>Fig.2 SEM images of the SnO2 by different methods

图2 不同制备方法SnO2 的SEM照片
Fig.2 SEM images of the SnO2 by different methods

$图3 不同工作温度下气敏元件对体积分数为2.6×10-7的乙醇气体的灵敏度<br/>Fig.3 (Color online)Sensitivities of the gas sensor towards the volume fraction of 2.6×10-7 ethanol gas at different working temperatures$

图3 不同工作温度下气敏元件对体积分数为2.6×10-7的乙醇气体的灵敏度
Fig.3 (Color online)Sensitivities of the gas sensor towards the volume fraction of 2.6×10-7 ethanol gas at different working temperatures

表1 基于不同形貌SnO2传感器对乙醇气体的灵敏性能对比<br/>Table 1 Comparison of gas sensitivity towards ethanol for SnO2 sensors with different morphology

表1 基于不同形貌SnO2传感器对乙醇气体的灵敏性能对比
Table 1 Comparison of gas sensitivity towards ethanol for SnO2 sensors with different morphology

图4 元件在120 ℃下对不同气体的灵敏度<br/>Fig.4 (Color online)Sensitivities of different gas sensor at 120 ℃

图4 元件在120 ℃下对不同气体的灵敏度
Fig.4 (Color online)Sensitivities of different gas sensor at 120 ℃

图5 元件在120 ℃下对体积分数为2.6×10-7的乙醇气体体积动态响应恢复周期曲线<br/>Fig.5 (Color online)Dynamic response and recovery characteristic curve of the gas sensor to 2.6×10-7 ethanol at the operating temperature of 120 ℃

图5 元件在120 ℃下对体积分数为2.6×10-7的乙醇气体体积动态响应恢复周期曲线
Fig.5 (Color online)Dynamic response and recovery characteristic curve of the gas sensor to 2.6×10-7 ethanol at the operating temperature of 120 ℃

图6 元件在120 ℃下对体积分数为2.6×10-7的不同气体的灵敏度<br/>Fig.6 (Color online)Selectivities of the gas sensor to 2.6×10-7 for various gases at 120 ℃

图6 元件在120 ℃下对体积分数为2.6×10-7的不同气体的灵敏度
Fig.6 (Color online)Selectivities of the gas sensor to 2.6×10-7 for various gases at 120 ℃

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引言

1 实验

2 结果与讨论

3 结语

期刊信息

备注

引言

1 实 验

2 结果与讨论

3 结 语

期刊信息

1 实验

3 结语