通过不同条件的水热法和溶胶-凝胶技术分别制备了单分散SnO2纳米粉体。利用X射线衍射、透射电子显微镜和比表面积分析仪对产物进行了检测,采用静态配气法测试了样品的气敏性能。结果表明,水热时间越长,颗粒尺寸越大,以反应时间为6 h制备的粉体比表面积最大;溶胶-凝胶产物中,以SnCl2的乙醇溶液为原料制得的颗粒克服了热处理过程中产物易团聚的问题,颗粒尺寸均匀,具有良好的分散性和较高的比表面积。两种方法制备的粉体均对酒精具有良好的灵敏度,SnCl2的乙醇溶液为原料、溶胶-凝胶技术获得的材料对酒精的灵敏度更高,并认为热处理过程中Cl-的去除是导致材料气敏性能不同的主要因素。
SnO2 nanopowders were synthesized by sol-gel and hydrothermal techniques with different Sn-sources.Crystal structure and size distribution of the products were studied by X-ray diffraction（XRD）,transmission electron microscopy（TEM） and Brunauer-Emmett-teller（BET） method.Gas sensitive properties were tested by means of static state.The results show that the powders prepared by hydrothermal method with 6 h reaction time display a narrow size range and a higher specific surface area.Spherical-like SnO2 nano-particles with an average diameter of 5 nm,which are obtained by sol-gel method with SnCl2 as Sn-sourse,present better dispersion in comparison with other products.The SnO2 nanopowders prepared in this paper show an improved alcohol response and the powders by sol-gel method exhibit better sensing performance.The existence of Cl-is regarded as the main reasons to account for the differences of the sensitivity.
参考文献
| [1] | Rembeza E S;Richard O;Van Landuyt J .Influence of laser and isothermal treatments on microstructure properties of SnO2 films[J].Materials Res Bu11,1999,34(10-11):1527-1533. |
| [2] | Sedghi, SM;Mortazavi, Y;Khodadadi, A .Low temperature CO and CH4 dual selective gas sensor using SnO2 quantum dots prepared by sonochemical method[J].Sensors and Actuators, B. Chemical,2010(1):7-12. |
| [3] | Song, F;Su, HL;Han, J;Xu, JQ;Zhang, D .Controllable synthesis and gas response of biomorphic SnO2 with architecture hierarchy of butterfly wings[J].Sensors and Actuators, B. Chemical,2010(1):39-45. |
| [4] | Yu L M;Fan X H;Qi L J et al.Dependence of morphologies for SnO2 nanostructures on their sensing property[J].Applied Surface Science,2011,257:3140-3144. |
| [5] | LI Dong-xuan,赵胜利,WEN Jiu-ba,祝要民,ZHAO Chong-jun.NiO纳米晶的溶胶-凝胶法制备及电化学性能[J].材料热处理学报,2008(04):39-42. |
| [6] | 古凤才,赵竹萱,李英慧,门娟,严菊明,刘瑞贤,张丽华.表面修饰二氧化锡纳米微晶的制备与表征[J].物理化学学报,2003(07):621-625. |
| [7] | 连进军,李先国,冯丽娟,马艳丽.溶胶-凝胶-冷冻干燥技术制备纳米二氧化锡及其表征[J].化学世界,2004(04):171-174. |
| [8] | Xiangfeng Chu;Yanlei Han;Sumei Zhou;Hengfu Shui .Trimethylamine sensing properties of nano-SnO_2 prepared using microwave heating method[J].CERAMICS INTERNATIONAL,2010(7):2175-2180. |
| [9] | 李裕,郭雨,刘有智,石国亮,谢五喜.超细2,4-二羟基苯甲酸铜粉体的合成及表征[J].火炸药学报,2006(03):32-35. |
| [10] | 石娟,吴世华,王淑荣.从不同氧化态锡盐水热合成法制备纳米SnO2粉体[J].无机化学学报,2004(02):199-201. |
| [11] | Bin Cheng;Joette M.Russell;Wensheng Shi;Lei Zhang;Edward T.Samulski .Large-Scale,Solution-Phase Growth of Single-Crystalline SnO_2 Nanorods[J].Journal of the American Chemical Society,2004(19):5972-5973. |
| [12] | Lionel Vayssieres;Michael Graetzel .Highly Ordered SnO_2 Nanorod Arrays from Controlled Aqueous Growth[J].Angewandte Chemie,2004(28):3666-3670. |
| [13] | Matin B M;Mortazavi Y;Khodadadi A A et al.Alkaline- and template-free hydrothermal synthesis of stable SnO2 nanopartieles and nanorods for CO and ethanol gas sensing[J].Sensors and Actuators B:Chemical,2010,151:140-145. |
| [14] | Crystal growth in colloidal tin oxide nanocrystals induced by coalescence at room temperature[J].Applied physics letters,2003(8):1566-1568. |
| [15] | Ribeiro C J H;Lee E;Giraldi T R et al.Study of synthesis variables in the nanocrystal growth behavior of tin oxide processed by controlled hydrolysis[J].Journal of Physical Chemistry B,2004,108:15612-15617. |
| [16] | Chiu HC;Yeh CS .Hydrothermal synthesis of SnO2 nanoparticles and their gas-sensing of alcohol[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2007(20):7256-7259. |
| [17] | Wang, X.-B.;Qin, N.;Lou, T.-J.;Lou, X.-D. .Study of the synthesis and Cl2 gas-sensing properties of nanometer HNO3-doped SnO2[J].Physica, B. Condensed Matter,2011(3):597-600. |
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