采用阳极氧化法,以金属钛箔为原料制备了TiO2纳米管阵结构染料敏化纳米晶太阳能电池( DSSC)光阳极,并用电沉积、光沉积和真空蒸发法对其表面分别进行金属Ag和Au修饰.对金属修饰前后的光阳极用扫描电子显微镜(SEM)和X射线衍射分析仪(XRD)表征发现:阳极氧化法制备的TiO2纳米管阵列结构规整有序；经过化学沉积后,其表面均覆盖有一层致密的金属粒子薄膜.测量光电流密度-电压(J-V)曲线和电化学阻抗谱(EIS)发现:相比纯TiO2纳米管阵列,经过Ag修饰后的TiO2阵列其短路电流密度和开路电压最大可以分别提高到前者的4.9和1.7倍,并且其电化学阻抗出现显著降低.研究表明:金属Ag修饰改善了TiO2纳米管之间的连通性,提高了TiO2光阳极中电子的传输效率,并通过等离子共振激发出光电子,同时与TiO2相互作用,使其在可见光区域也能够促进电子-空穴对的分离.
参考文献
| [1] | Masakazu A;Masato T .The design and development of highly reactive titanium oxide photocatalysts operating under visible light irradiation[J].Journal of Catalysis,2003,216(1/2):505-516. |
| [2] | Dawei G;Grimes C A;Varghese O K et al.Titanium oxide nanotube arrays prepared by anodic oxidation[J].Journal of Materials Research,2001,16(12):3331-3334. |
| [3] | T. Bak;J. Nowotny;M. Rekas .Photo-electrochemical hydrogen generation from water using solar energy. Materials-related aspects[J].International journal of hydrogen energy,2002(10):991-1022. |
| [4] | Vishal K;Mahajan;Susanta K;Mohapatra;Mano Misra .Stability Of Tio_2 Nanotube Arrays In Photoelectrochemical Studies[J].International journal of hydrogen energy,2008(20):5369-5374. |
| [5] | S.K.Mohapatra;M.Misra;V.K.Mahajan .A novel method for the synthesis of titania nanotubes using sonoelectrochemical method and its application for photoelectrochemical splitting of water[J].Journal of Catalysis,2007(2):362-369. |
| [6] | Paulose M;Mor GK;Varghese OK;Shankar K;Grimes CA .Visible light photoelectrochemical and water-photoelectrolysis properties of titania nanotube arrays[J].Journal of Photochemistry and Photobiology, A. Chemistry,2006(1):8-15. |
| [7] | Mantana Moonsiri;Pramoch Rangsunvigit;Sumaeth Chavadej;Erdogan Gulari .Effects of Pt and Ag on the photocatalytic degradation of 4-chlorophenol and its by-products[J].Chemical Engineering Journal,2004(2/3):241-248. |
| [8] | 李海龙,罗武林,陈涛,田文宇,孙茂,黎春,朱地,刘冉冉,赵宇亮,刘春立.载Ag二氧化钛纳米管的制备及其光催化性能[J].物理化学学报,2008(08):1383-1386. |
| [9] | Chen L C;Chou T C .Photodecolorization of methyl orange using silver ion modified TiO2 as photocatalyst[J].Industrial and Engineering Chemistry Research,1994,33(06):1436-1443. |
| [10] | 包华辉,徐铸德,殷好勇,郑遗凡,陈卫祥.TiO2纳米管负载Ag、Au、Pt纳米粒子的微波合成与表征[J].无机化学学报,2005(03):374-378. |
| [11] | Nishijima Y;Ueno K;Yokota Y.Plasmon-assisted photocurrent generation from visible to near-infrared wavelength using a Au-nanorods/TiO2 electrode[J].The Journal of Physical Chemistry Letters,2010(01):2031-2036. |
| [12] | Qingyun Cai;Maggie Paulose;Oomman K. Varghese .The effect of electrolyte composition on the fabrication of self-organized titanium oxide nanotube arrays by anodic oxidation[J].Journal of Materials Research,2005(1):230-236. |
| [13] | Janne Halme;Anne-Maria Visuri;Kati Miettunen .Two-Dimensional Time-Dependent Numerical Modeling of Edge Effects in Dye Solar Cells[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2011(14):7019-7031. |
| [14] | Ferber J.;Luther J.;Stangl R. .An electrical model of the dye-sensitized solar cell[J].Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion,1998(1/2):29-54. |
| [15] | Byunghong Lee;Dae-Kue Hwang;Peijun Guo .Materials, Interfaces, and Photon Confinement in Dye-Sensitized Solar Cells[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,2010(45):14582-14591. |
| [16] | Hoshikawa T;Yamada M;Kikuchi R;Eguchi K .Impedance analysis for dye-sensitized solar cells with a three-electrode system[J].Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry,2005(2):339-348. |
| [17] | Hoshikawa T;Yamada M;Kikuchi R et al.Impedance analysis of internal resistance affecting the photoelectrochemical performance of dye-sensitized solar cells[J].Journal of the Electrochemical Society,2005,152(02):E68-E73. |
| [18] | Hitzig J;Juttner K;Lorenz W J et al.AC-impedance measurements on corroded porous aluminum oxide films[J].Journal of the Electrochemical Society,1986,133(05):887-892. |
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%