采用化学气相沉积法,利用金属钛片为钛源,在金属Pd颗粒的催化下原位生长了锥状TiO2纳米带.扫描电镜(SEM)、XRD和透射电镜(TEM)表征结果表明所制备的锥状TiO2纳米带长度为数十微米,接近基底的底端宽度为1～4μm,顶端形成几十纳米的尖端;此纳米带晶型为金红石结构;锥状TiO2纳米带生长方向是长度方向为[110],横向是[001]方向.对比实验验证了金属Pd颗粒对锥状TiO2纳米带的生长初期起着重要的作用.笔者认为纳米带生长的初期由VLS生长机制决定,而固态Ti原子的扩散对锥状纳米带的形成起着重要的作用.单根TiO2纳米带不同位置的微区拉曼谱均有442 cm-1、604 cm-1两个响应带,分别对应着TiO2金红石相Eg和A1g的拉曼活跃模式.表面光电压谱的研究发现锥状TiO2纳米带具有良好的光电特性,在光催化、光电器件等领域具有潜在应用前景.
参考文献
| [1] | Fujishima A;Honda K .Electrochemical photolysis of water at a semiconductor electrode[J].NATURE,1972,238:37. |
| [2] | Amy L. Linsebigler;Guangquan Lu;John T. Yates Jr. .Photocatalysis on TiO_2 Surfaces: Principles, Mechanisms, and Selected Results[J].Chemical Reviews,1995(3):735-758. |
| [3] | 韩承辉,李智渝,沈俭一.纳米TiO2-Cu2O可见光下光催化降解活性艳红及其机理研究[J].材料导报,2014(14):4-8,13. |
| [4] | O' Regan B;Gretzel M .A low-cost,high-efficiency solar cell based on dye-sensitized colloidal TiO2 films[J].NATURE,1991,353:737. |
| [5] | 有机染料共敏化太阳能电池研究进展[J].材料导报,2014(13):126-130. |
| [6] | Jianping Zou;Qing Zhang;Kai Huang .Ultraviolet Photodetectors Based on Anodic TiO2 Nanotube Arrays[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2010(24):10725-10729. |
| [7] | Gong D W;Grimes C A;Varghese O K et al.Titanium oxide nanotube arrays prepared by anodic oxidation[J].Journal of Materials Research,2001,16(12):3331. |
| [8] | Xia MX;Zhang QL;Li HX;Dai GZ;Yu HC;Wang TH;Zou BS;Wang YG .The large-scale synthesis of one-dimensional TiO2 nanostructures using palladium as catalyst at low temperature[J].Nanotechnology,2009(5):055605-1-055605-8-0. |
| [9] | Zheng Miao;Dongsheng Xu;Jianhua Ouyang;Guolin Guo;Xinsheng Zhao;Youqi Tang .Electrochemically Induced Sol-Gel Preparation of Single-Crystalline TiO_2 Nanowires[J].Nano letters,2002(7):717-720. |
| [10] | Y. Lei;L. D. Zhang;G. W. Meng;G. H. Li;X. Y. Zhang;C. H. Liang;W. Chen;S. X. Wang .Preparation and photoluminescence of highly ordered TiO_(2) nanowire arrays[J].Applied physics letters,2001(8):1125-1127. |
| [11] | Xia Y N;Yang P D;Sun Y G et al.One-dimensional nanostructures:Synthesis,characterization,and applications[J].Advanced Materials,2003,15(05):353. |
| [12] | D. V. Bavykin;J. M. Friedrich;F. C. Walsh .Protonated Titanates and TiO_2 Nanostructured Materials: Synthesis, Properties, and Applications[J].Advanced Materials,2006(21):2807-2824. |
| [13] | Ghicov A;Schmuki P .Self-ordering electrochemistry:A review on growth and functionality of TiO2 nanotubes and other self-aligned MOx structures[J].Chemistry Communications,2009,20:2791. |
| [14] | K. S. Raja;M. Misra;K. Paramguru .Formation of self-ordered nano-tubular structure of anodic oxide layer on titanium[J].Electrochimica Acta,2005(1):154-165. |
| [15] | Kisumi T;Tsujiko A;Nakato Y .Crystal-face and illumination intensity dependences of the quantum efficiency of photoelectrochemical etching,in relation to those of water photooxidation,at n-TiO2 (rutile) semiconductor electrodes[J].Journal of Electroanalytical Chemistry,2003,545:99. |
| [16] | Wu JM;Shih HC;Wu WT;Tseng YK;Chen IC .Thermal evaporation growth and the luminescence property of TiO2 nanowires[J].Journal of Crystal Growth,2005(2/4):384-390. |
| [17] | Jung-Chul Lee;Kyung-Soo Park;Tae-Geun Kim .Controlled growth of high-quality TiO_2 nanowires on sapphire and silica[J].Nanotechnology,2006(17):4317-4321. |
| [18] | Xiang B;Zhang Y;Wang Z;Luo XH;Zhu YW;Zhang HZ;Yu DP .Field-emission properties of TiO2 nanowire arrays[J].Journal of Physics, D. Applied Physics: A Europhysics Journal,2005(8):1152-1155. |
| [19] | Amin SS;Nicholls AW;Xu TT .A facile approach to synthesize single-crystalline rutile TiO2 one-dimensional nanostructures[J].Nanotechnology,2007(44):445609-1-445609-5-0. |
| [20] | Ma C;Moore D;Ding Y et al.Nanobelt and nanosaw structures of Ⅱ-Ⅵ semiconductors[J].Int J Nanotechn,2004,1(04):431. |
| [21] | Sheldon R I;Gilles P W .The high temperature vaporization and thermodynamics of the titanium oxides.Ⅺ.Stoichiometric titanium monoxide[J].Journal of Chemical Physics,1977,66(08):3705. |
| [22] | Lutjering G;Williams J C.Titanium2nd ed[M].Springer,2007 |
| [23] | Morales A M;Lieber C M .A laser ablation method for the synthesis of crystalline semiconductor nanowires[J].SCIENCE,1998,279(5348):208. |
| [24] | Parker J C;Segel R W .Calibration of the Raman spectrum to the oxygen stoichiometry of nanophase TiO2[J].Applied Physics Letters,1990,57(09):943. |
| [25] | Swamy V .Size-dependent modifications of the first-order Raman spectra of nanostructured rutile TiO2[J].Physical review, B. Condensed matter and materials physics,2008(19):195414-1-195414-4-0. |
| [26] | Mazza T;Barborini E;Piseri P;Milani P;Cattaneo D;Bassi AL;Bottani CE;Ducati C .Raman spectroscopy characterization of TiO2 rutile nanocrystals[J].Physical review, B. Condensed matter and materials physics,2007(4):5416-1-5416-5-0. |
| [27] | Li Bassi A;Cattaneo D;Russo V;Bottani CE;Barborini E;Mazza T;Piseri P;Milani P;Ernst FO;Wegner K .Raman spectroscopy characterization of titania nanoparticles produced by flame pyrolysis: The influence of size and stoichiometry[J].Journal of Applied Physics,2005(7):4305-1-4305-9-0. |
| [28] | Bersani D.;Ding XZ.;Lottici PP. .Phonon confinement effects in the Raman scattering by TiO2 nanocrystals[J].Applied physics letters,1998(1):73-75. |
| [29] | Akira Fujishima;Tata N. Rao;Donald A. Tryk .Titanium dioxide photocatalysis[J].Journal of photochemistry and photobiology, C. Photochemistry reviews,2000(1):1-21. |
| [30] | Kronik L;Shapira Y .Surface photovoltage phenomena:Theory,experiment,and applications[J].Surface Science Reports,1999,37(1-5):1. |
| [31] | 张清林,曹尚操,夏明霞,王小件,万强,潘安练.利用拉曼和表面光电压谱对一维TiO2@CdS核壳结构界面电荷行为研究[J].化学学报,2013(04):634-638. |
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%