常压下,采用强碱熔融-水热法,制备了Ag修饰复合TiO2纳米管,并就材料的组织与形貌进行了表征.XRD表征显示复合TiO2纳米管由锐钛矿和金红石相组成.TiO2纳米管形貌清晰,较均匀整齐,管径约为3～5nm,由3～5层单壁组成,管壁壁厚约为0.5nm,其中,Ti和Ag纳米颗粒清晰地附着在纳米管之间以及最外层纳米管壁上.在350nm波长以内,均出现带-带跃迁.表面光电压谱(surface photovoltage spectroscopy,SPS)和场致诱导表面光电压谱(electric field-induced surface photovoltage spectroscopy,FISPS)光伏响应强度随着外电场极性的改变作不对称变化,出现束缚激子亚带隙跃迁的特征.Ag修饰对TiO2纳米管光伏响应影响大.
参考文献
| [1] | Garrett C G B;Brattain W H .Physical theory of semiconductor surfaces[J].Physical Review,1955,99:376-387. |
| [2] | Johnson E O .Measurement of minority carrier lifetimes with the surface photovoltage[J].Journal of Applied Physics,1957,28(11):1349-1353. |
| [3] | Goodman A M .A method for the measurement of short minority carrier diffusion lengths in semiconductors[J].Journal of Applied Physics,1961,32(12):2550-2552. |
| [4] | Gatos H C;Lagowski J .Surface photovoltage spectroscopy a new approach to the study of high-gap semiconductor surfaces[J].Journal of Vacuum Science and Technology,1973,10(01):130-135. |
| [5] | Brillson L J .The structure and properties of metal-semiconductor interfaces[J].Surface Science Reports,1982,2(02):123-326. |
| [6] | Kronik L;Shapira Y .Surface photovoltage phenomena:pheory,experiment and applications[J].Surface Science Reports,1999,37(1-5):1-206. |
| [7] | Lu, Y.;Lin, Y.;Wang, D.;Wang, L.;Xie, T.;Jiang, T. .Surface charge transfer properties of high-performance Ag-decorated ZnO photocatalysts[J].Journal of Physics, D. Applied Physics: A Europhysics Journal,2011(31):315502-1-315502-7. |
| [8] | 张晓茹;林艳红;张健夫 等.催化和表面结构[J].物理化学学报,2010,26(10):2733-2738. |
| [9] | Z. Ding;G. Q. Lu;P. F. Greenfield .Role of the Crystallite Phase of TiO_2 in Heterogeneous Photocatalysis for Phenol Oxidation in Water[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,2000(19):4815-4820. |
| [10] | Hisahiro Einaga;Masafumi Harada;Shigeru Futamura;Takashi Ibusuki .Generation of Active Sites for CO Photooxidation on TiO_2 by Platinum Deposition[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,2003(35):9290-9297. |
| [11] | Hexing Li;Zhenfeng Bian;Jian Zhu;Yuning Huo;Hui Li;Yunfeng Lu .Mesoporous Au/TiO_2 Nanocomposites with Enhanced Photocatalytic Activity[J].Journal of the American Chemical Society,2007(15):4538-4539. |
| [12] | 余威威,张青红,石国英,李耀刚,王宏志.Pt负载型二氧化钦纳米管/纳米晶复合光催化剂的制备及其光催化性能[J].无机材料学报,2011(07):747-752. |
| [13] | Wei-Cheng Lin;Chun-Nan Chen;Tzu-Tsung Tseng;Ming-Hsiung Wei;J.H. Hsieh;Wenjea J. Tseng .Micellar layer-by-layer synthesis of TiO_2/Ag hybrid particles for bactericidal and photocatalytic activities[J].Journal of the European Ceramic Society,2010(14):2849-2857. |
| [14] | Iijima S .Helical microtubules of graphitic carbon[J].Nature,1991,354(6348):56-58. |
| [15] | Yoshikazu Suzuki;Susumu Yoshikawa .Synthesis and thermal analyses of TiO_2-derived nanotubes prepared by the hydrothermal method[J].Journal of Materials Research,2004(4):982-985. |
| [16] | Gong D;Grimes C;Varghese O K et al.Titanium oxide nanotube arrays prepared by anodic oxidation[J].Journal of Materials Research,2001,16(12):3331-3334. |
| [17] | 李静玲,陈文哲,毕晶晶,郭大敬,杨炳灿,周志武.常压下Ag-TiO_2 纳米管制备及光催化反应动力学研究[J].传感技术学报,2010(05):617-620. |
| [18] | 李静玲,陈文哲,吴波,黄世震,林伟,李世平,曹小霞,翁晴,王敏.银掺杂TiO_2纳米管制备与性能研究[J].功能材料,2012(08):953-957. |
| [19] | O'Regan B;Gratzel M .A low-cost,high-efficiency solar cell based on dye-sensitized colloidal TiO2 films[J].Nature,1991,353(6346):737-740. |
| [20] | Manuela Jakob;Haim Levanon;Prashant V. Kamat .Change Distribution between UV-Irradiated TiO_2 and Gold Nanoparticles: Determination of Shift in the Fermi Level[J].Nano letters,2003(3):353-358. |
| [21] | 李子亨,王德军,王平,魏霄,张清林.纳米TiO2的光生电荷迁移特性研究[J].物理化学学报,2005(03):310-314. |
| [22] | Anders Hagfeld;Michael Graetzel .Light-Induced Redox Reactions in Nanocrystalline Systems[J].Chemical Reviews,1995(1):49-68. |
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%