以3-氨丙基三乙氧基硅烷(3-APTES)为表面修饰剂,利用乙氧基与SnO2表面羟基之间的化学反应,将SiO2化学接枝于SnO2表面,以阻止SnO2晶粒热生长.采用SEM、TEM、FT-IR、XRD和EDS等技术对改性后纳米SnO2进行结构表征.结果表明,SiO2通过Sn—O—Si化学键与SnO2相连接,SiO2被高度分散于SnO2表面.经1000℃高温煅烧后,SnO2平均粒径改性前后分别为95和10nm.SiO2作为第二相,阻碍了晶界的移动,增加了晶粒生长活化能,从而有效地限制了晶粒高温生长,提高了纳米SnO2的热稳定性.
参考文献
| [1] | Korotcenkov, G .The role of morphology and crystallographic structure of metal oxides in response of conductometric-type gas sensors[J].Materials Science & Engineering. R, Reports,2008(1/6):1-39. |
| [2] | 徐甲强,刘艳丽,牛新书.纳米ZnS的合成及其气敏性能研究[J].功能材料,2002(04):425-426,429. |
| [3] | 林毓韬,徐涛,柳清菊.碳纳米管及其掺杂氧化物半导体气敏传感器[J].功能材料,2011(07):1159-1162. |
| [4] | Aruna I;Kruis F E;Kundu S et al.CO ppb sensors based on monodispersed SnOx ∶ Pd mixed nanoparticle layers:insight into dual conductance response[J].Journal of Applied Physics,2009,105:64312-64312. |
| [5] | Kong XH;Li YD .High sensitivity of CuO modified SnO2 nanoribbons to H2S at room temperature[J].Sensors and Actuators, B. Chemical,2005(2):449-453. |
| [6] | Davis SR.;Wright JD.;Chadwick AV. .The effects of crystallite growth and dopant migration on the carbon monoxide sensing characteristics of nanocrystalline tin oxide based sensor materials[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,1998(9):2065-2071. |
| [7] | Xu C;Tamaki J;Miura N et al.Stabilization of SnO2 ultrafineparticles by additives[J].Journal of Materials Science,1992,27:963971. |
| [8] | 张天舒;沈瑜生;张瑞芳 .掺镉纳米SnO2的热稳定性、电导及气敏性能[J].功能材料,1995,26(04):294-297. |
| [9] | Pavelko, RG;Vasil'ev, AA;Sevast'yanov, VG;Gispert-Guirado, F;Vilanova, X;Kuznetsov, NT .Studies of thermal stability of nanocrystalline SnO2, ZrO2, and SiC for semiconductor and thermocatalytic gas sensors[J].Russian journal of electrochemistry,2009(4):470-475. |
| [10] | Korotcenkov G .Gas response control through structural and chemical modification of metal oxide films: state of the art and approaches[J].Sensors and Actuators, B. Chemical,2005(1):209-232. |
| [11] | Katsunori Kosuge;Atsushi Ogata .Effect of SiO2 addition on thermal stability of mesoporous γ-alumina composed of nanocrystallites[J].Microporous and mesoporous materials: The offical journal of the International Zeolite Association,2010(1/3):60-66. |
| [12] | L A O'Dell;S L P Savin;A V Chadwick .Structural studies of silica- and alumina-pinned nanocrystalline SnO_2[J].Nanotechnology,2005(9):1836-1843. |
| [13] | Nae-Lih Wu;Sze-Yen Wang;I. A. Rusakova .Inhibition of Crystallite Growth in the Sol-Gel Synthesis of Nanocrystalline Metal Oxides[J].Science,1999(5432):1375-1377. |
| [14] | 唐平,黄晓霞.氧化锡薄膜的光学性能及制备技术[J].四川兵工学报,2012(12):122-125. |
| [15] | Chadwick AV;Savin SLP;O'Dell LA;Smith ME .Keeping it small - restricting the growth of nanocrystals[J].Journal of Physics. Condensed Matter,2006(15):L163-L170. |
| [16] | Amalric-Popescu D;Bozon-Verduraz F .Infrared studies on SnO2 and Pd/SnO2[J].Catalysis Today,2001,70:139-154. |
| [17] | San Miguel E R;Gardulo-García A V;Núlez-Gaytán M E et al.Application of an organic-inorganic hybrid membrane for selective gold(Ⅲ)permeation[J].Journal of Membrane Science,2008,307:1-9. |
| [18] | Antonio Tricoli;Markus Graf;Sotiris E. Pratsinis .Optimal Doping for Enhanced SnO_2 Sensitivity and Thermal Stability[J].Advanced functional materials,2008(13):1969-1976. |
| [19] | 王晓红,郭耘,郭杨龙,王筠松,卢冠忠.高温稳定的Al2O3基复合氧化物的制备与性能[J].无机材料学报,2005(04):895-901. |
| [20] | 刘东亮,栾道成.纳米结构材料热稳定性分析[J].化工时刊,2004(02):41-44. |
| [21] | B. -N. KIM .MODELING GRAIN GROWTH BEHAVIOR INHIBITED BY DISPERSED PARTICLES[J].Acta materialia,2001(3):543-552. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%