Effective photocatalytic degradation of methylene blue by Cu2O/MgAl layered double hydroxides

被引：0
作者：
Yangmeihui Zhou
Wenjihao Hu
Jingang Yu
Feipeng Jiao
机构：
[1] Central South University,College of Chemistry and Chemical Engineering
来源：
Reaction Kinetics, Mechanisms and Catalysis | 2015年 / 115卷
关键词：
Layered double hydroxides; Cu; O; Photocatalysis mechanism;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A series of Cu2O/MgAl layered double hydroxides (Cu2O/LDHs) were first synthesized by an in situ method. X-ray diffraction analysis confirmed that Cu2O/LDH calcined at 773 K calcination temperature (Cu2O/CLDH-773) had a better crystal structure. N2-adsorption/desorption isotherms and scanning electron microscopy images indicated that the resulting Cu2O/CLDH-773 composite possesses high crystallinity, hierarchical structure as well as a large specific surface area. Energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy were used to investigate the type and content of the elements in Cu2O/CLDH-773. UV–Vis diffuse reflectance spectra confirmed that Cu2O/CLDH-773 has an absorption band whose maximum falls in the visible region. The as-prepared Cu2O/CLDH-773 displayed significant photocatalytic activity for the degradation of methylene blue (MB) under visible light irradiation. Factors that may affect the photodegradation of MB such as calcination temperature, LDHs content were studied. The stability of the photocatalysts was confirmed using reclaimed Cu2O/CLDH-773 in four successive runs, and the results indicated that Cu2O/CLDH-773 has a potential application in the field of photocatalysis. From the results of characterization and photodegradation, a possible mechanism for the photocatalytic dye degradation over Cu2O/CLDH-773 was proposed.
引用
收藏
页码：581 / 596
页数：15
相关论文
共 144 条
[11]  
Wang X(2013)/Cu Appl Catal B 134–135 293-301
[12]  
Zhu N(2012)O nanoflowers by hydrothermal method and its photocatalytic activity enhancement under simulated sunlight Chem Eng J 211–212 421-431
[13]  
Dang Z(2013)Catalytic activity of Cu Catal Commun 42 109-112
[14]  
Chong MN(2014)O micro-particles with different morphologies in the thermal decomposition of ammonium perchlorate J Solid State Chem 212 1-6
[15]  
Jin B(2009)Binary [Cu J Am Chem Soc 131 13833-13839
[16]  
Chow ChWK(2010)O/MWCNT] and ternary [Cu J Hazard Mater 177 150-158
[17]  
Saint C(2010)O/ZnO/MWCNT] nanocomposites: formation, characterization and catalytic performance in partial ethanol oxidation Catal Today 150 353-357
[18]  
Lu R(2013)Visible-light photocatalytic decolorization of reactive brilliant red X-3B on Cu Chem Eng J 222 60-66
[19]  
Xu X(2008)O/crosslinked-chitosan nanocomposites prepared via one step process Catal Surv Asia 12 253-265
[20]  
Chang J(2012)Preparation of p–n junction Cu Dalton T 41 1173-1178
12345678910