以锌粒、浓硝酸和氢氧化钠为原料,聚乙二醇400为表面活性剂,采用水热法制备纳米ZnO粉体。利用X射线衍射和扫描电镜对产物的结构和微观形貌进行表征。将合成材料制备成旁热式气敏元件,采用静态配气法对乙醇、丙酮、甲醇、二甲苯、甲苯和氨水等进行气敏性能测试。结果显示:ZnO纳米粉体对乙醇、丙酮和甲醇表现出良好的敏感性,具有较快的响应和脱附速度,且灵敏度与浓度呈良好的线性关系。
ZnO powders were synthesized through a hydrothermal process used Zn grain,HNO3 and NaOH as the raw materials,as well as PEG-400 as surfacant.The structure and morphology of product were characterized by XRD and SEM.The as-prepared material was made into indirect-heat gas sensor and its gas sensitive performance for ethanol,acetone,methanol,xylene,toluene and ammonia were tested by the static distribution.The results indicated that ZnO showed good sensitivity to ethanol,acetone and methanol.It also had faster response and desorption rate,what's more,the sensitivity and the concentration had a good linear relationship.
[1] Yang Z,Li L M,Wan Q,et al.High-performance etanol sensing based on an aligned assembly of ZnO nanorods[J].Sens Actuat B,2008,135(1):57-60.
[2] Wang X B,Cai W P,Liu S W,et al.ZnO hollow microspheres with exposed porous nanosheets surface:structurally enhanced adsorption towards heavy metal ions[J].Colloids and Surfaces A:Physicochem Eng Aspects,2013,422(5):199-205.
[3] Zhao X W,Gao X Y,Chen X M,et al.Microstructure and optical properties of nitrogen-doped ZnO film[J].Chin Phys B,2012,22(2):024202.
[4] Wei Y L,Huang Y F,Wu J H,et al.Synthesis of hierarchically structured ZnO spheres by facile methods and their photocatalytic deNOx properties[J].Journal of Hazardous Materials,2013,248-249:202-210.
[5] 杨洪伟,王迎春,曹传宝,等.氧化锌纳米棒微球的水热制备及其气敏性质研究[J].材料工程,2007(2):3-7.
[6] Natsume Y,Sakata H,Hirayama T,et al.Low-temperature conductivity of ZnO films prepared by chemical vapor deposition[J].Journal of Applied Physics,1992,72(9):4203-4207.
[7] 姚振钰,贺洪波,柴春林,等.在P-Si(100)上溅射法生长ZnO的结构和光学特性[J].功能材料与器件学报,2000,6(4):338-341.
[8] 张学鹜,吴文健,满亚辉.溶胶-凝胶法制ITO薄膜研究进展[J].材料科学与工艺,2007,15(2):264-268.
[9] Zhang Y,Xu J Q,Xiang Q,et al.Brush-like hierarchical ZnO nanostructures:synthesis,photoluminesence and gas sensor properties[J].J Phys Chem C,2009,113:3430-3435.
[10] 姚鹏军.不同结构纳米La1-xSrxFeO3材料的制备及其气敏特性研究[D].大连:大连理工大学,2014.
[11] 杜海英,王兢,王娟.静电纺丝运动轨迹的建模与仿真研究[J].材料科学与工艺,2012,20(6):56-62.
基金资助
河南省基础研究项目(102300410128);大学生创新训练项目(201510467009)
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