光谱学与光谱分析 |
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Spectral Analysis of CdZnSe Ternary Quantum Dots Sensitized TiO2 Tubes and Its Application in Visible-Light Photocatalysis |
HAN Zhi-zhong1, 2, REN Li-li2, PAN Hai-bo2*, LI Chun-yan1, CHEN Jing-hua1, CHEN Jian-zhong2 |
1. School of Pharmacy, Fujian Medical University, Fuzhou 350108, China 2. College of Chemistry, Fuzhou University, Fuzhou 350108, China |
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Abstract In this work, cadmium nitrate hexahydrate [Cd(NO3)2·6H2O] is as a source of cadmium, zinc nitrate [Zn(NO3)2] as a source of zinc source, and NaHSe as a source of selenium which was prepared through reducing the elemental selenium with sodium borohydride (NaBH4). Then water-soluble Cd1-xZnxSe ternary quantum dots with different component were prepared by colloid chemistry. The as-prepared Cd1-xZnxSe ternary quantum dots exhibit stable fluorescent property in aqueous solution, and can still maintain good dispersivity at room temperature for four months. Powder X-ray diffraction (XRD) and high resolution transmission electron microscope (HRTEM) were used to analyze crystal structure and morphology of the prepared Cd1-xZnxSe. It is found that the as-prepared ternary quantum dots are cubic phase, show as sphere, and the average of particle size is approximate 4 nm. The spectral properties and energy band structure of the as-prepared ternary quantum dots were modulated through changing the atom ratio of elements Zn and Cd. Compared with binary quantum dots CdSe and ZnSe, the ultraviolet-visible (UV-Visible) absorption spectrum and fluorescence (FL) emission spectrum of ternary quantum dots are both red-shift. The composites (Cd0.5Zn0.5Se@TNTs) of Cd0.5Zn0.5Se ternary quantum dots and TiO2 nanotubes (TNTs) were prepared by directly immerging TNTs into quantum dots dispersive solution for 5 hours. TEM image shows that the Cd0.5Zn0.5Se ternary quantum dots were closely combined to nanotube surface. The infrared spectra show that the Ti-Se bond was formed between Cd0.5Zn0.5Se ternary quantum dots and TiO2 nanotubes, which improve the stability of the composite. Compared to pristine TNTs, UV-Visible absorption spectrum of the composites is significantly enhanced in the visible region of light. And the absorption band edge of Cd0.5Zn0.5Se@TNTs red-shift from 400 to 700 nm. The recombination of the photogenerated electron-hole pairs was restrained with the as-prepared ternary quantum dots. Therefore, the visible-light photocatalytic efficiency was greatly improved. After visible-light irradiation for 60 min, the degradation of Cd0.5Zn0.5Se@TNTs photocatalysts for RhB is nearly 100%, which is about 3.3 times of that of pristine TNTs and 2.5 times of that of pure Cd0.5Zn0.5Se ternary quantum dots, respectively.
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Received: 2014-11-12
Accepted: 2015-02-25
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Corresponding Authors:
PAN Hai-bo
E-mail: hbpan@fzu.edu.cn
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[1] Wu Y K, Jin S Q, Ye Y, et al. J. Phys. Chem. C, 2014, 118: 30269. [2] Wang M, Jiang J G, Liu G J, et al. Appl. Catal. B, 2013, 138-139: 304. [3] Zhao J J, Jiang B T, Zhang S Y, et al. Sci. China Ser. B, 2009, 52: 2213. [4] Zhong X, Han M, Dong Z, et al. J. Am. Chem. Soc., 2003, 125: 8589. [5] Cameron P J, Zhong X, Knoll W. J. Phys. Chem. C, 2009, 113: 6003. [6] Zhen Y g, Yang Z, Ying J Y. Adv. Mater., 2007, 19: 1475. [7] Sheng Y, Wei J, Liu B, et al. Mater. Res. Bull., 2014, 57: 67. [8] Zheng K, ídek K, Abdellah M, et al. J. Am. Chem. Soc., 2014, 136: 6259. [9] Talapin D V, Mekis I, Go1tzinger S, et al. J. Phys. Chem. B, 2004, 108: 18826. [10] Lim J, Jun S, Jang E, et al. Adv. Mater., 2007, 19: 1927. [11] Murali K R, Balasubramanian M. Curr. Appl. Phys., 2010, 10: 734. [12] Chavhan S D, Mane R S, Ganesh T, et al. J. Alloys Compd., 2009, 474: 210. [13] Jana S, Srivastava B B, Jana S, et al. J. Phys. Chem. Lett., 2012, 3: 2535. |
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