MnO2/NiO纳米复合微球的制备及室温NOx气敏性能研究  

Preparation of MnO_2/NiO Nanocomposite Microspheres and Gas-sensing Properties of NO_x at Room Temperature

作　　者：阚侃[1] 林雨斐 王菁华[3] 田媛[1] 石雨[1] 史克英[2] 

机构地区：[1]黑龙江省科学院大庆分院,大庆163319 [2]黑龙江大学化学化工与材料学院,功能无机材料化学省部共建教育部重点实验室,哈尔滨150080 [3]黑龙江省科学院火山与矿泉研究所,黑河164155

出　　处：《人工晶体学报》2015年第1期101-107,共7页Journal of Synthetic Crystals

基　　金：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)

摘　　要：采用低温沉淀法合成含有Mn和Ni的碳酸盐前驱体。经焙烧处理制备了MnO2/NiO纳米复合微球。采用SEM和XRD研究了复合材料的形貌和结构。结果表明:所制备的MnO2/NiO复合微球直径约为2μm。微球表面纳米粒子稀松的排列,且粒子端口呈介孔结构。在室温下,MnO2/NiO-2薄膜传感器对NOx具有较好的气敏响应。当NOx气体浓度为100 ppm时,灵敏度达36%,响应时间为11 s。MnO2/NiO-2传感器对NOx气体的最低检测线为3 ppm。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.

关 键 词：MnO2/NiO 微球 NOx 气敏响应 

分 类 号：O643.3[理学—物理化学] O614.43[理学—化学]