Preparation and Visible-light Catalytic Property of Ag+/Ag/ZnOPorous Nano-structured Fiber Materials†

doi:10.7503/cjcu20140065

Chem. J. Chinese Universities ›› 2014, Vol. 35 ›› Issue (7): 1523.doi: 10.7503/cjcu20140065

• Physical Chemistry • Previous Articles Next Articles

Preparation and Visible-light Catalytic Property of Ag⁺/Ag/ZnOPorous Nano-structured Fiber Materials^†

SHAO Kerang¹, LI Jianjiao¹, AN Xingcai², LEI Ziqiang¹, SU Bitao^1,^*()

1. Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
2. Gansu Natural Energy Research Institute, Gansu Acaderny of Science, Lanzhou 730046, China

Received:2014-01-20 Online:2014-07-10 Published:2014-04-29
Contact: SU Bitao E-mail:subt0608@gmail.com
Supported by:
Supported by the National Natural Science Foundation of China(No.21174114), the Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China(No IRT1177), the Scientific and Technical Plan Project of Gansu Province, China(No.1204GKCA006), the Natural Science Foundation of Gansu Province, China(No.1010RJZA024) and the Scientific and Technical Innovation Project of Northwest Normal University, China(No nwnu-kjcxgc-03-63)

Abstract

Abstract:

Ag⁺/Ag/ZnO porous nano-structured fiber materials were prepared by the template-assisted two-steps method and characterized by thermogravimetric analysis(TG), X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), scanning electron microscopy(SEM) and UV-Vis spectroscopy(UV-Vis) techniques. The effect of modified silver amount(molar fraction, 0—1.5%) on the photocatalytic property of ZnO materials was studied by the degradation of methylene blue(MB) as the model reaction. The results show that the Ag⁺-Ag co-modified ZnO porous nano-structured fiber materials are successfully prepared via the template-assisted two-steps method and the Ag⁺-Ag co-modifification affects the photocatalytic performance of ZnO materials by affecting its cell structure and light adsorption property and morphology. Under the irradiation of visible light, the Ag⁺/Ag/ZnO porous nano-structured fiber materials showed better catalytic performance than pure ZnO and the catalytic perfrmace of Ag⁺/Ag/ZnO is related to the modified amount of Ag⁺-Ag. In this paper, the way of Ag⁺ and Ag for improving photocatalytic performance of the ZnO materials was discussed. And the obtained results are helpful to understand the photocatalytic phenomena and mechanisms on the multi-structured material.

Key words: Ag+/Ag/ZnO, Porous nano-structured fiber material, Template-assisted two-steps method, Photocatalytic property

CLC Number:

O643.3

TrendMD:

SHAO Kerang, LI Jianjiao, AN Xingcai, LEI Ziqiang, SU Bitao. Preparation and Visible-light Catalytic Property of Ag⁺/Ag/ZnOPorous Nano-structured Fiber Materials^†[J]. Chem. J. Chinese Universities, 2014, 35(7): 1523.

Figures/Tables 8

Fig.1 XRD patterns of samples D-0(a), D-3(b) and D-5(c)

Fig.2 XPS spectra of sample D-3 (A) Survey spectrum; (B) O1s spectrum; (C) Ag3d spectrum.

Fig.3 Low-magnified SEM images of CF(A) and D-3(B)

Fig.4 High-magnified SEM images of samples D-0(A), D-3(B) and D-5(C)

Fig.5 UV-Vis spectra of samples D-0(a), D-3(b) and D-5(c)

Fig.6 Photocatalytic property of samples D-0—D-5 The inset shows the relationship between D2.0(t=2.0 h) and Ag content.

Fig.7 Reused property of samples D-0 and D-3 irradiating time: 2.5 h)

Fig.8 High efficient absorption of the light and separation of photogenerated charges(e-h+ pairs) in Ag+/Ag/ZnO porous nano-structured fiber material (A) High-magnified SEM image of sample D-3; (B) high efficient absorption of the light in Ag+/Ag/ZnO porous nano-stractured fiber material; (C) separation of photogenerated charges(e-h+ pairs) in Ag+/Ag/ZnO porous nano-structared fiber material.

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Preparation and Visible-light Catalytic Property of Ag⁺/Ag/ZnOPorous Nano-structured Fiber Materials^†

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