| 菜花状纳米氧化锌的溶剂热合成及气敏性能研究 | |
| Solvent-thermal Synthesis and Gas Sensitivity of Cauliflower-like ZnO Nanomaterial | |
| 摘要: 以Zn(NO3)2·6H2O和NaOH为原料，采用溶剂热合成技术制备了菜花状氧化锌纳米粉体，采用X射线衍射仪、扫描电镜和X-射线光电子能谱仪等对产物的物相、微观形貌和表面元素状态进行了表征，结果表明产物属于六方晶系的ZnO，呈规则的菜花状，分散性好，粒径90～100 nm，粉体表面存在大量的吸附氧。用该粉体制成厚膜型旁热式气敏元件，测试结果发现：在加热电压为6 V时气敏元件对甲醇、乙醇、正丙醇、丙酮、苯和甲苯等还原性气体具有较高的灵敏度，特别是对正丙醇、丙酮有较好的选择性，可以检测浓度低至1 μL·L-1的乙醇、正丙醇和丙酮。 | |
| 关键词: 菜花状氧化锌 溶剂热合成 气敏性 | |
| 基金项目: | |
| Abstract: Solvent-thermal technique was used to synthesize cauliflower-like ZnO nanopowders with Zn(NO3)2·6H2O and NaOH as the raw materials. The products were characterized by X-ray diffraction(XRD), scanning electron microscope(SEM) and X-ray photoelectron spectroscopy(XPS). The results showed that the products belonged to hexagonal crystal cell and were uniform with the size of 90～100 nm. There are large quantity adsorbed oxygen on the surface of ZnO. It′s thick film-type gas sensor was prepared and the gas sensitivities were evaluated. The sensor based on cauliflower-like ZnO exhibited high responses to methanol, ethanol, 1-propanol, acetone, benzene and toluene at working voltage of 6 V, especially showed a good selectivity and low detection limits to 1-propanol and acetone. It is important to note that the sensor could detect ethanol, 1-propanol and acetone of 1 μL·L-1. | |
| Keywords: cauliflower-like ZnO solvent-thermal synthesize gas sensitivity | |
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| 由丽梅,霍丽华,程晓丽,赵 辉,高 山.菜花状纳米氧化锌的溶剂热合成及气敏性能研究[J].无机化学学报,2008,24(7):1035-1039. | |
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