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采用低温水热法制备了Zn O及一系列掺杂Er的Zn O(Zn O:x%Er)粉末。通过X射线衍射分析制备的样品为六方纤锌矿结构,Er以三价离子形式化学掺杂到Zn O中。扫描电镜显示制备的样品均为二维片状,且能量色散X射线光谱及X光电子能谱表明了制备的样品由Zn,O及Er元素组成。气敏测试结果显示Zn O:3%Er材料对二甲胺具有良好的灵敏度,在300℃对100×10-6二甲胺灵敏度可达到106.51。该样对二甲胺具有良好的稳定性和快速的响应恢复时间,响应时间为6 s,恢复时间为11 s。在胺类气氛中,Zn O:3%Er对二甲胺具有优异的选择性。Zn O:3%Er良好的气敏性能可能与其表面含有较高储氧能力的Er3+有关。
Zn O and Zn O (Zn O: x% Er) powders doped with Er were prepared by low temperature hydrothermal method. Samples prepared by X-ray diffraction analysis were hexagonal wurtzite structures and Er was chemically doped into ZnO as trivalent ions. Scanning electron microscopy showed that the prepared samples were two-dimensional sheets, and energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy showed that the prepared samples consisted of Zn, O and Er elements. Gas sensing test results show that Zn O: 3% Er has good sensitivity to dimethylamine, and the sensitivity to 100 × 10-6 dimethylamine at 300 ℃ can reach 106.51. The p-dimethylamine has good stability and rapid response recovery time, response time of 6 s, the recovery time of 11 s. In amine atmosphere, ZnO: 3% Er has excellent selectivity to dimethylamine. Zn O: 3% Er Good gas sensing properties may be related to Er3 +, which has a high oxygen storage capacity on its surface.