Ag修饰TiO<sub>2</sub>纳米管紫外探测器的构筑及性能研究

以液相沉积法在FTO衬底上制备了TiO2纳米管阵列, 在室温下利用光沉积法在TiO2纳米管表面修饰金属纳米Ag颗粒, 并采用SEM、EDS、XRD对样品的形貌、成分、结构等进行表征.实验结果表明, 制备的TiO2纳米管分布均匀, 由锐钛矿相组成, 并在管壁有明显的纳米Ag颗粒附着.以Pt为对电极制备了Ag/TiO2纳米管紫外探测器, 光响应测试结果表明, Ag/TiO2纳米管紫外探测器具有可见光盲特性, 可以实现对紫外光的探测.与TiO2纳米管紫外探测器相比, Ag修饰TiO2纳米管紫外探测器光电流密度提高至91 μA/cm2, 开关比可达2 251, 紫外探测性能显著提高.

Abstract

TiO2 nanotubes were synthesized on FTO substrate by liquid phase deposition method. Subsequently Ag particles were photodeposited on the surface of TiO2 nanotubes. Moreover the obtained array was investigated by SEM, EDS and XRD. As a result, TiO2 nanotubes exhite anatase phase, and there are obvious Ag particles attached on the surface of the tube wall. Under UV irradiation, the ultraviolet detector based on Ag/TiO2 nanotubes shown the excellent visible-blind characteristic. After a deposition of Ag, the ultraviolet detector based on Ag/TiO2 nanotubes exhibited a high on/off ratio of 2 251, together with the photocurrent density of 91μA/cm2.

参考文献

[1] DU Xing, LI Wei-xin, ZHAO Lei, et al. Electron transport improvement in CdSe-quantum dot solar cells using ZnO nanowires in nanoporous TiO2 formed by foam template［J］. Journal of Photochemistry & Photobiology A: Chemistry, 2019,371: 144-150.

[2] 刘开贤, 蔺吉虹, 史建华, 等. GaAs纳米线阵列太阳能电池的设计与优化［J］. 光子学报, 2016, 45(4): 0425002.

LIU Kai-xian, LIN Ji-hong, SHI Jian-hua, et al. Design and optimization of GaAs nanowire array solar cells［J］. Acta Photonica Sinica. 2016, 45(4): 0425002.

[3] CHEN Y P, ZHENG C H, HU L Q, et al. Improved performance of a back-illuminated GaN-based metal-semiconductor-metal ultraviolet photodetector by in-situ modification of one-dimensional ZnO nanorods on its screw dislocations［J］. Journal of Alloys and Compounds, 2019,775: 1213-1220.

[4] 苗竟, 曾凡哲, 管磊, 等. 基于二氧化钛-介孔硅复合材料的光催化毒气过滤器［J］.光子学报,2018, 47(7): 0712001.

MIAO Jing, ZENG Fan-zhe, GUAN Lei, et al. Photocatalytical poison gas filter based on nano-TiO2 mesoporous silica composite［J］. Acta Photonica Sinica, 2018, 47(7): 0712001.

[5] UMALE S, SUDHAKAR V, SONTAKKE S M, et al. Improved efficiency of DSSC using combustion synthesized TiO2［J］. Materials Research Bulletin, 2019, 109: 222-226.

[6] SELMAN A M, HASSAN Z. Fabrication and characterization of metal-semiconductor-metal ultraviolet photodetector based on rutile TiO2 nanorod［J］. Materials Research Bulletin, 2016, 73: 29-37.

[7] LIU Guo-hua, HOIVIK N, WANG Xiao-ming, et al. Photoconductive free-standing crystallized TiO2 nanotube membranes［J］. Electrochimica Acta, 2013, 93: 80-86.

[8] SHANKAR K, TEP K C, MOR G K, et al. An electrochemical strategy to incorporate nitrogen in nanostructured TiO2 thin films: modification of bandgap and photoelectrochemical properties［J］. Journal of Physics D: Applied Physics, 2006, 39(11): 2361.

[9] ZHAO Hui-min, CHEN Yue, QUAN Xie, et al. Preparation of Zn-doped TiO2 nanotubes electrode and its application in pentachlorophenol photoelectrocatalytic degradation［J］. Chinese Science Bulletin, 2007, 52(11): 1456-1461.

[10] LI Xia-yang, HE Dong-mei, CAI Qing-yun. Fabrication and catalytic properties of Co-Ag-Pt nanoparticle-decorated titania nanotube arrays［J］. Journal of Physical Chemistry C, 2007, 111(23): 8214-8217.

[11] SANO T, NEGISHI N, MAS D, et al. Photocatalytic decomposition of N2O on highly dispersed Ag+ ions on TiO2 prepared by photodeposition［J］. Journal of Catalysis, 2000, 194(1): 71-79.

[12] LU Qi-peng, LU Zhen-da, LU Yun-zhang, et al. Photocatalytic synthesis and photovoltaic application of Ag-TiO2 nanorod composites［J］. Nano Letters, 2013, 13(11): 5698-5702.

[13] WU Tong-shun, WANG Kai-xue, LI Guo-dong, et al. Montmorillonite-supported Ag/TiO2 nanoparticles: an efficient visible-light bacteria photodegradation material［J］. Acs Applied Materials & Interfaces, 2010, 2(2): 544-550.

[14] MAIVALAGAN T, VISWANNATHAN B, VARADARAJU U V. Fabrication and characterization of uniform TiO2 nanotube arrays by Sol-gel template method［J］. Bulletin of Materials Science, 2006, 29(7): 705-708.

[15] 杨兴华, 王丽莉, 杨晟. Ag微米管阵列修饰的聚合物光子晶体光纤制备工艺研究［J］. 光子学报, 2008, 37(2): 265-268.

YANG Xing-hua, WANG Li-li, YANG Sheng. Research on fabricating of Ag-microtubes modified polymer crystal optical fibres［J］. Acta Optica Sinica, 2008, 37(2): 265-268.

[16] WEN Li-ping, LIU Bao-shun, LIU Chao, et al. Preparation, characterization and photocatalytic property of Ag-loaded TiO2powders using photodeposition method［J］. Journal of Wuhan University of Technology, 2009, 24(2): 258-263.

[17] 祁晓萌, 彭文博, 赵小龙, 等．基于高阻ZnO薄膜的光电导型紫外探测器［J］.物理学报, 2015, 64(19): 198501.

QI Xiao-meng, PENG Wen-bo, ZHAO Xiao-long, et al. Photoconductive UV detector based on high-resistance ZnO thin film［J］. Acta Physica Sinica,2015, 64(19): 198501.

[18] YOO J H, LANGE A, BUDE J, et al. Optical and electrical properties of indium tin oxide films near their laser damage threshold［J］. Optical Materials Express, 2017, 7(3): 817-826.

[19] HOU Xue-bin, STANLEY S L, ZHAO Min, et al. MOF-based C-doped coupled TiO2/ZnO nanofibrous membrane with crossed network connection for enhanced photocatalytic activity［J］. Journal of Alloys and Compounds, 2019, 777: 982-990.

[20] YU Jia-guo, XIONG Jian-feng, CHENG Bei, et al. Fabrication and characterization of Ag-TiO2 multiphase nanocomposite thin films with enhanced photocatalytic activity［J］. Applied Catalysis B: Environmental, 2005, 60(3-4): 211-221.

方向明, 李想, 贾杰, 桑丹丹, 高世勇. Ag修饰TiO₂纳米管紫外探测器的构筑及性能研究[J]. 光子学报, 2019, 48(6): 0604003. FANG Xiang-ming, LI Xiang, JIA Jie, SANG Dan-dan, GAO Shi-yong. Fabrication and Properties of Ultraviolet Detector Based on Ag-modified TiO2 Nanotubes[J]. ACTA PHOTONICA SINICA, 2019, 48(6): 0604003.

Ag修饰TiO₂纳米管紫外探测器的构筑及性能研究

关于本站 Cookie 的使用提示

全站搜索

Ag修饰TiO2纳米管紫外探测器的构筑及性能研究

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索

Ag修饰TiO₂纳米管紫外探测器的构筑及性能研究