Facile synthesis, structure and visible light photocatalytic activity of recyclable ZnFe2O4/TiO2

被引：70

作者：

Zhu, Xiaodi ^{[1
]}

Zhang, Fan ^{[1
]}

Wang, Mengjiao ^{[2
]}

Ding, Jianjun ^{[1
,2
]}

Sun, Song ^{[1
,2
]}

Bao, Jun ^{[1
,2
]}

Gao, Chen ^{[1
,2
]}

机构：

[1] Univ Sci & Technol China, Collaborat Innovat Ctr Chem Energy Mat, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China

[2] Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Anhui, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2014年 / 319卷

基金：

中国国家自然科学基金;

关键词：

Photocatalysis; Solution combustion; ZnFe2O4; TiO2; TIO2; DEGRADATION; NANOPARTICLES; CARBON; WATER; ZNO;

D O I：

10.1016/j.apsusc.2014.07.051

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A kind of sponge-like ZnFe2O4/TiO2 composite was facilely synthesized by a solution combustion method. The physicochemical properties, including the crystalline phase, surface morphology, spectral response, photogenerated charge carriers' separation and transfer efficiency, were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, N-2 adsorption/desorption isotherms, X-ray photoelectron spectroscopy, UV-vis absorption spectroscopy and photoluminescence spectroscopy techniques and analyzed to interpret the relationship between the structure and photocatalytic activity. The sponge-like morphology promotes the adsorption of reaction species as well as functions as a good light harvesting structure for the enhancement of spectral utilization. The hetero-junction effectively inhibited the recombination of photogenerated charge carriers. With these synergistic effects, the degradation rate of methylene blue on ZnFe2O4/TiO2 was up to 93.2% under visible light irradiation and remained stable even after five consecutive reaction runs. Moreover, owing to the magnetic property, ZnFe2O4/TiO2 can be recycled easily. Additionally, a photocatalytic mechanism of ZnFe2O4/TiO2 was proposed. (C) 2014 Elsevier B. V. All rights reserved.

引用

页码：83 / 89

页数：7

共 39 条

[1] Visible-Light-Induced Water Splitting Based on Two-Step Photoexcitation between Dye-Sensitized Layered Niobate and Tungsten Oxide Photocatalysts in the Presence of a Triiodide/Iodide Shuttle Redox Mediator [J].