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Ni掺杂SnO2花状微结构的制备及其气敏特性研究


第 30 卷 第 12 期 2017 年 12 月 传 感 技 术 学 报 CHINESE JOURNAL OF SENSORS AND ACTUATORS Vol. 30 No. 12 Dec. 2017 Synthesis of FlowerLike Nickel Doped Tin Oxide and Its Gas Sensing Properties* YANG Jie, WANG Ying, WANG Zepeng, XUE Yan, WANG Xiu, HU Jie * ( Micro and Nano System Research Center, College of Information Engineering, Taiyuan University of Technology, Taiyuan 030024, China) Abstract: Pristine SnO 2 and 4 mol% Nidoped SnO 2 flowerlike microstructures were successfully synthesized by a facile hydrothermal method. The crystal structure and morphology of the samples were characterized by Xray diffraction( XRD ) , energy dispersive spectroscopy ( EDS ) and scanning electron microscopy ( SEM ) . Furthermore, gas sensing experiments were conducted on the asfabricated pristine and Nidoped SnO 2 gas sensors toward methanol. The obtained results demonstrated that the introducing of Ni element can significant enhanced the gas sensing properties of SnO 2 microstructure. The measured response of Nidoped SnO 2 toward 100 ? 10 -6 methanol can reach to 13.0 at the optimum operating temperature of 280 ? , which is about 2.4 times higher than that of pristine SnO 2 . Meanwhile, the gas sensor based on Nidoped SnO 2 also exhibits fast response / recovery time ( -6 6 s /5 s ) , low detection the gas sensing mechanism of Nidoped SnO 2 gas sensor limit( 1 ? 10 ) and better selectivity to methanol. Finally, was discussed. Key words: gas sensor; Nidoped SnO 2 ; hydrothermal method; methano

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