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《Journal of Synthetic Crystals》 2015-01
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Preparation of MnO_2/NiO Nanocomposite Microspheres and Gas-sensing Properties of NO_x at Room Temperature

KAN Kan;LIN Yu-fei;WANG Jing-hua;TIAN Yuan;SHI Yu;SHI Ke-ying;Daqing Branch of Heilongjiang Academy of Sciences;Key Laboratory of Functional Inorganic Material Chemistry,Ministry of Education,School of Chemistry and Materials Science,Heilongjiang University;Institute of Volcanol and Spring of Heilongjiang Academy of Sciences;  
The carbonates precursor with Mn and Ni were synthesized by precipitation method under low temperature. The MnO2/NiO nanocomposite microspheres were prepared after calcinated treatment. The morphology and structure of materials were studied by SEM and XRD. The results show that the diameter of MnO2/NiO nanocomposite microspheres is about 2 μm. The nanoparticles on the surface of microsphere arrangement sloppy,and there are mesoporous in the port of nanoparticles. The MnO2/NiO-2 thin film sensor has good gas sensing response to NOxat room temperature. When the concentration of NOxreaches 100 ppm,sensitivity is 36% and the response time is 11 s. The limit level of MnO2/NiO-2sensor to NOxis 3 ppm.
【Fund】: 黑龙江省科学院青年创新基金重点项目;; 黑龙江省院所基本应用技术研究专项;; 国家自然科学基金联合基金项目(U1034003)
【CateGory Index】: O657;TP212
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