采用简单的溶胶凝胶阳极氧化铝模板法制备了ITO纳米管.通过FE-SEM、HRTEM、XRD对其微观形貌、结构、相组成等进行了表征和分析,并测试了其对H_2的气敏特性.结果表明,所得纳米管是由10～20 nm晶粒组成的多晶结构,壁厚约为25 nm,平均直径约250 nm,与AAO (Anodic Aluminum Oxide)模板的直径相同.产物在550 ℃热处理后为立方铁锰矿结构的In_2O_3,Sn~(4+)已经掺杂到In_2O_3的晶格中.所得ITO纳米管常温下对氢气具有较好的敏感性及稳定性.
Tin-doped indium oxide (ITO) nanotubes were fabricated by means of a simple sol-gel method combined with porous anodic aluminum oxide template. Scanning electron microscopy (SEM), Transmission electron microscopy, HRTEM, and X-ray diffraction were applied to characterize the morphology and structure of the as-prepared nanotubes. The gas sensing properties of the ITO nanotubes to wards H_2 (1000 μg/g) have been investigated. It has been demonstrated that the as-prepared nanotubes exhibited a polycrystalline microstructure, which are composed of nanoparticles with sizes ranging from 10 to 20 nm. The mean outer diameter of these nanotubes is about 250 nm, corresponding to the diameter of channels in the AAO template and the average thickness of the tube wall is about 25 nm. After postannealing at 550 ℃, X-ray diffraction pattern indicates that they are of a cubic bixbyite crystal structure and Sn~(4+) ions were homogeneously doped into the In_2O_3 crystal lattice. The as-synthesized ITO nanotubes showed excellent gas-sensing properties to H_2 in terms of sensor response and selectivity at room temperature.
参考文献
| [1] | Wan Q;Song Z T;Feng S L et al.[J].Applied Physics Letters,2004,85(20):4759. |
| [2] | Limmer S J;Cruz S V;Cao G Z .[J].Applied Physics A:Materials Science and Processing,2004,79:421. |
| [3] | Nguyen P;Ng H T;Cassell A M et al.[J].Nano Letters,2003,85(20):925. |
| [4] | Hoon Sik Jang;Do-Hyung Kim;Hyeong-Rag Lee et al.[J].Materials Letters,2005,59:1526. |
| [5] | Kalyanikutty KP;Gundiah G;Edem C;Govindaraj A;Rao CNR .Doped and undoped ITO nanowires[J].Chemical Physics Letters,2005(4-6):389-394. |
| [6] | 王金银,岳二红,余刚,肖耀坤,陈宗璋.AAO模板法制备Pd-Ni合金纳米线[J].稀有金属材料与工程,2007(01):126-129. |
| [7] | Rui Yang;Chunhong Sui;Jian Gong .Silver nanowires prepared by modified AAO template method[J].Materials Letters,2007(3):900-903. |
| [8] | Napolskiia K S;Eliseeva A A;Yesin N V et al.[J].Physica E,2007,37:178. |
| [9] | Brinda B.Lakshmi;Peter K.Dorhout;Charles R.Martin .Sol-gel template synthesis of semiconductor nanostructures[J].Chemistry of Materials,1997(3):857-862. |
| [10] | Zhu Wei;Wang Wenzhong;Xu Haolan et al.[J].Materials Chemistry and Physics,2006,99:127. |
| [11] | Cao Huaqiang;Qiu Xianqing;Liang Yu et al.[J].Applied Physics Letters,2006,88(24):241112. |
| [12] | Xu Jian;Liu Xiaohe;Li Yadong .[J].Materials Chemistry and Physics,2004,86:409. |
| [13] | Yang Zhi;Huang Yi;Dong Bin et al.[J].Journal of Solid State Chemistry,2006,179:3324. |
| [14] | 佘希林,宋国君,李建江,韩萍.模板浸润法制备非极性聚合物纳米管和纳米线[J].现代化工,2006(04):37-39,41. |
| [15] | Xue X Y;Chen Y J;Liu Y G et al.[J].Applied Physics Letters,2006,88(20):201907. |
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