Ag/ZnO纳米纤维的制备及光催化性能

doi:10.7503/cjcu20160864

高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (6): 907.doi: 10.7503/cjcu20160864

• 中国第四届静电纺丝大会专题研究论文 • 上一篇下一篇

Ag/ZnO纳米纤维的制备及光催化性能

孙连志¹, 赵圣哲², 高志伶³, 程志强²()

1.吉林农业大学信息技术学院, 长春 130118
2. 资源与环境学院, 长春 130118
3. 吉林大学化学学院, 长春 130012

收稿日期:2016-11-30 出版日期:2017-06-10 发布日期:2017-05-24
作者简介:联系人简介: 程志强, 男, 博士, 副教授, 主要从事空气过滤材料的制备及性能研究. E-mail: czq5974@163.com
基金资助:
吉林省科技发展计划项目(批准号: 20140411002XH, 20150411005XH)资助.

Controllable Synthesis of Ag Decorated ZnO Nanofibers for Enhanced Photocatalysis

SUN Lianzhi¹, ZHAO Shengzhe², GAO Zhiling³, CHENG Zhiqiang^2,^*()

1. Information Technology Academy, Changchun 130118, China
2. College of Resources and Environment, Jilin Agriculture University, Changchun 130118, China
3. College of Chemistry, Jilin University, Changchun 130012, China

Received:2016-11-30 Online:2017-06-10 Published:2017-05-24
Contact: CHENG Zhiqiang E-mail:czq5974@163.com
Supported by:
This paper is supported by the Projects of Science Technology of Jilin Province, China(Nos.20140411002, 20150411005XH).

摘要/Abstract

摘要：

采用静电纺丝技术及煅烧法制备了氧化锌纳米纤维, 然后采用水热法将银纳米颗粒负载到了氧化锌纳米纤维表面. 利用X射线衍射(XRD)、 X射线光电子能谱(XPS)、能量色散X射线光谱(EDX)、扫描电子显微镜(SEM)及透射电子显微镜(TEM)等技术对合成的Ag/ZnO纳米纤维的结构和组成进行了表征. SEM结果表明, 直径在5~100 nm之间的银纳米颗粒附着在直径在80~330 nm之间的氧化锌纤维表面形成了异质结构. 以常见的有机污染物甲基橙、亚甲基蓝和罗丹明B等为降解底物, 对Ag/ZnO纳米纤维的光催化性能进行了表征. 结果表明, 负载银纳米颗粒后, 复合催化剂的光催化性能明显提高.

关键词: 静电纺丝, 氧化锌, 纳米颗粒, 异质结构, 水热法

Abstract:

A simple and efficient procedure was developed to fabricate ZnO nanofibers by electrospinning and subsequent calcination. With the hydrothermal method, Ag nanoparticles(AgNPs) were deposited onto the surface of the ZnO nanofibers. Structure, composition and morphology of Ag/ZnO nanofibers were characterized by means of X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), energy dispersive X-ray spectroscopy(EDX), Scanning electron microscopy(SEM) and transmission electron microscopy(TEM). The results reveal that the diameters of ZnO nanofibers are between 80 and 330 nm, and the AgNPs attached to the ZnO nanofibers from the heterostructure are between 5 and 100 nm in size. The photocatalytic properties of Ag/ZnO nanofibers were verified by degradation of model compounds methyl orange, methylene blue and rhodamine B, and the Ag/ZnO samples showed efficient photocatalytic activity for the degradation of simulation pollutants.

Key words: Electrospinning, ZnO, Nanoparticles, Heterostructure, Hydrothermal method

中图分类号:

O614

TrendMD:

孙连志, 赵圣哲, 高志伶, 程志强. Ag/ZnO纳米纤维的制备及光催化性能. 高等学校化学学报, 2017, 38(6): 907.

SUN Lianzhi, ZHAO Shengzhe, GAO Zhiling, CHENG Zhiqiang. Controllable Synthesis of Ag Decorated ZnO Nanofibers for Enhanced Photocatalysis. Chem. J. Chinese Universities, 2017, 38(6): 907.

图/表 9

Table 1 Concentrations of reaction solutions and time used for preparation of Ag/ZnO nanofibers

Ag/ZnO nanofiber	c(AgNO₃)/ (mol·L^-1)	c(HMTA)/ (mol·L^-1)	Soaking time/h
ZA1	0.005	0.005	2
ZA2	0.005	0.005	3
ZA3	0.01	0.01	2

Fig.1 TG-DTA diagram for the precursor composite nanofibers

Fig.2 SEM images of ZnO(A), ZA1(B), ZA2(C) and ZA3(D)

Fig.3 TEM(A) and HRTEM(B) images of ZA1 and EDX spectra of ZnO(C) and ZA1(D)

Fig.4 XRD patterns of ZnO(a) and ZA1(b)

Fig.5 XPS spectra of ZnO(a) and ZA1(b)

Fig.6 UV-Vis DRS of ZA1(a) and ZnO(b)

Fig.7 Photocatalytic degradation rate of MO in the presence of different samples under UV light(A), UV-Vis absorption spectra for the photocatalytic degradation of MO(B), MB(C) and RhB(D) in the presence of ZA1(A) a. No catalyst; b—d. in the presence of ZA1, ZA2 and ZA3, respectirely; (B) and (D) a. before adsorption; b. after adsorption equilibrium; c—g. irradiated for 10, 20, 30, 40 and 50 min, respectirely; (C) a. before adsorption; b. after adsorption equilibrium; c—g. irradiated for 7, 14, 21, 28, 35 min, respectirely.

Fig.8 Schematic of electron-hole separations and energy band matching of Ag/ZnO nanofibers under UV light illumination

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Ag/ZnO纳米纤维的制备及光催化性能

Controllable Synthesis of Ag Decorated ZnO Nanofibers for Enhanced Photocatalysis

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