Preparation and Characterization of Zinc and Cerium Co-doped Titania Nano-materials with Antibacterial Activity

doi:10.3724/SP.J.1077.2013.12337

Abstract

Abstract:

Zinc and cerium co-doped titania (Zn/Ce-TiO₂) nano-materials were synthesized by a Sol-Gel method at different calcination temperatures. Zn/Ce-TiO₂ nano-materials were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), X-ray photoelectron spectroscope (XPS) and UV-Vis diffuse reflectance spectra (DRS). With the test of bacterial inhibition zone, the antibacterial properties of Zn/Ce-TiO₂ nano-materials on E. coli. were investigated. The results show that crystallinity and the crystal phase of nano-materials are closely dependent on the calcination temperature. Zinc ions and cerium ions exist in the form of Zn₂Ti₃O₈ and CeO₂ phase, respectively. The Zn/Ce-TiO₂ nano-materials synthesized exhibit enhanced antibacterial activity under visible light irradiation compared with it in the dark. Ultimately, the action mechanism of Zn/Ce co-doping is discussed.

Key words: zinc and cerium co-doping, titania, antibacterial activity, visible light

CLC Number:

TB321

WANG Yu-Zheng, XUE Xiang-Xin, YANG He. Preparation and Characterization of Zinc and Cerium Co-doped Titania Nano-materials with Antibacterial Activity[J]. Journal of Inorganic Materials, 2013, 28(1): 117-122.

Figures/Tables 6

Fig. 1 XRD patterns of Zn/Ce-TiO2 calcined at different temperatures

Table 1 Lattice parameters of TiO2 nano-materials

Materials	a (b) /nm	c / nm	V / nm³
TiO₂-550	0.37820	0.95076	0.13599
Zn-Ce/TiO₂-550	0.37846	0.92187	0.13204
Zn-Ce/TiO₂-600	0.37826	0.93116	0.13323
Zn-Ce/TiO₂-650	0.37867	0.92702	0.13338
Zn-Ce/TiO₂-700	0.37861	0.95734	0.13723
Zn-Ce/TiO₂-750	0.37885	0.95971	0.13774
Zn-Ce/TiO₂-800	0.37851	0.94746	0.13574

Fig. 2 TEM image of Zn-Ce/TiO2-600 (a) and SAED pattern of Zn-Ce/TiO2-600 (b)

Fig. 3 XPS spectra for Zn/Ce-TiO2 materials

Fig. 4 UV-Vis diffuse reflection spectra for Zn/Ce-TiO2 materials calcined at different temperatures

Fig. 5 Antibacterial results of Zn/Ce co-doped TiO2 at different calcination temperatures

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