氧化石墨烯与氧化锌复合材料的制备及室温NOx气敏性能研究  

Synthesis and NO_x Gas Sensitivity at Room Temperature of Graphene Oxide and ZnO Composites

作　　者：柴丽雅[1] 刘松莹[1] 杨颖[1,2] 葛云龙[1] 李丽[3] 张国[1] 史克英[1] 

机构地区：[1]黑龙江大学功能无机材料化学省部共建教育部重点实验室,哈尔滨150080 [2]齐齐哈尔大学化学与化学工程学院,齐齐哈尔161000 [3]黑龙江大学黑龙江省普通高等学校高效转化的化工过程与技术重点实验室,哈尔滨150080

出　　处：《人工晶体学报》2013年第8期1611-1615,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(21076066);黑龙江省自然科学基金重点项目(ZD201002);黑龙江省自然科学基金(B201105);黑龙江省科学院青年创新基金(CX10G01)资助课题;哈尔滨市科技创新人才研究专项资金资助项目(RC2012XK018005)

摘　　要：以Zn(NO3)2·6H2O为锌源,尿素为沉淀剂,氧化石墨烯(GO)为碳源,采用均匀沉淀法合成碱式碳酸锌与氧化石墨烯复合材料前驱体,350℃下焙烧前驱体2 h,获得ZnO/GO复合材料,在室温下研究了该复合材料对NOx的气敏性能。通过X射线衍射、拉曼光谱、扫描电子显微镜和透射电子显微镜对材料的形貌和结构进行表征。结果表明,所得样品为六方ZnO与GO复合材料,ZnO纳米粒子较均匀的覆盖在GO的表面。当硝酸锌溶液浓度为0.3 mol/L时,所合成的复合材料对NOx有较高的灵敏度,且注入NOx体积浓度97 ppm时,灵敏度为27.5%,响应时间1 s,最低检测浓度可达0.97 ppm。The basic zinc carbonate （ Zn4 CO3 （OH） 6 H2 O） precursor and graphene oxide （GO） composite were prepared by homogeneous precipitation method using zinc nitrate as zinc source, urea （CO （NH2 ） 2 ） as precipitants, graphene oxide as carbon source. ZnO and GO nanocomposites were obtained from the precursors by calcined at 350 ℃ for 2 h. The gas sensing property of the composite on NOx at room temperature were detected. The composite materials were characterized by XRD, Raman spectroscopy, SEM and TEM. The results indicated that composite materials are hexagonal ZnO and GO. The ZnO nanoparticles are distributed on the graphene oxide sheets. The sensitivity of NO, gas demonstrated good performance at room temporature with the zinc nitrate concertmtion of 0.03 mol./L, the sensitivity and response time is about 27.5% and 1 s to 97 ppm NOx respectively. The lowest detection concentration is 0. 97 ppm.

关 键 词：氧化石墨 均匀沉淀法 氧化锌 NOx气敏 

分 类 号：O614.24[理学—无机化学] O64[理学—化学]