Synthesis of ZnO nanorods by spray pyrolysis for H2S gas sensor
Synthesis of ZnO nanorods by spray pyrolysis for H2S gas sensor
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DOI：
10.1016/j.jallcom.2012.03.020
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发表时间：
2012-07
影响因子：
6.2
通讯作者：
S. Shinde;G. Patil;D. D. Kajale-D.;V. Gaikwad;G. Jain
中科院分区：
文献类型：
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作者：
S. Shinde;G. Patil;D. D. Kajale-D.;V. Gaikwad;G. Jain
采用喷雾热解技术（SPT）成功合成了不同尺寸的六角柱状ZnO纳米棒。以等量的甲醇和水为溶剂，溶解AR级醋酸锌为前驱体溶液。将该溶液喷涂到加热至350°C的玻璃基板上。通过紫外光谱（UV）、X射线衍射（XRD）、场发射扫描电子显微镜（FESEM）和透射电子显微镜（TEM）对薄膜进行了表征。薄膜沉积形成一层由形状良好的六角形 ZnO 纳米棒组成的层，其直径为 90-120 nm，长度可达 200 nm。在30°（室温）至450°C的工作温度下，研究了这些薄膜对各种干扰气体（如CO2、CO、乙醇、NH3和H2S等）的气敏性能。结果表明，ZnO纳米棒薄膜在50℃下对H2S气体（100ppm）表现出比传统材料更好的灵敏度和稳定性。六角柱状ZnO纳米棒可以提高传感器的灵敏度和选择性。
Hexagonal pillar shaped ZnO nanorods with different sizes have been successfully synthesized by spray pyrolysis technique (SPT). The equal amount of methanol and water is used as a solvent to dissolve the AR grade Zinc acetate for precursor solution. This solution is sprayed on to the glass substrate heated at 350°C. The films were characterized by ultra-violet spectroscopy (UV), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). The deposition of thin films results in a layer comprising well-shaped hexagonal ZnO nanorods with diameter of 90–120nm and length of up to 200nm. The gas sensing properties of these films have been investigated for various interfering gases such as CO2, CO, ethanol, NH3and H2S, etc. at operating temperature from 30° (room temperature) to 450°C. The results indicate that the ZnO nanorods thin films showed much better sensitivity and stability than the conventional materials to H2S gas (100ppm) at 50°C. The hexagonal pillar shaped ZnO nanorods can improve the sensitivity and selectivity of the sensors.