The layered double hydroxide route to Bi-Zn co-doped TiO2 with high photocatalytic activity under visible light

被引:61
作者
Benalioua, Bahia [1 ]
Mansour, Meriem [1 ]
Bentouami, Abdelhadi [1 ]
Boury, Bruno [2 ]
Elandaloussi, El Hadj [1 ]
机构
[1] Univ Mostaganem, Lab Valorisat Mat, Mostaganem 27000, Algeria
[2] Univ Montpellier 2, ICG CMOS UMR 5253, F-34095 Montpellier 05, France
关键词
Photocatalyst; LDH; Bi-Zn-TiO2; Visible Light; Indigo Carmine; EFFICIENT PHOTOCATALYSTS; NANOCRYSTALLINE TIO2; TITANIUM-DIOXIDE; AZO DYES; DEGRADATION; BISMUTH; WATER; PHOTODEGRADATION; NANOFIBERS; PLATINUM;
D O I
10.1016/j.jhazmat.2015.02.013
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this work, a co-doped Bi-Zn-TiO2 photocatalist is synthesized by an original synthesis route of layered double hydroxide followed by heat treatment at 670 degrees C. After characterization the photocatalyst efficiency is estimated by the photo-discoloration of an anionic dye (indigo carmine) under visible light and compare to TiO2-P25 as reference material. In this new photocatalyst, anatase and ZnO wurtzite are the only identified crystalline phase, rutile and Bi2O3 being undetected. Moreover, the binding energy of Bi determined (XPS analysis) is different from the one of Bi in Bi2O3. Compared to TiO2-P25, the absorption is red shifted (UV-vis DRS) and the Bi-Zn-TiO2 photocatalyst showed sorption capacity toward indigo carmine higher than that TiO2-P25. The kinetics of the photo-discoloration is faster with Bi-Zn-TiO2 than with TiO2-P25. Indeed, a complete discoloration is obtained after 70 min and 120 min in the presence of Bi-Zn-TiO2 and TiO2-P25 respectively. The identification of the responsible species on photo-discoloration was carried out in the presence of different scavengers. The study showed that the first responsible is h(+) specie with a moderate contribution of superoxide anion radical and a minor contribution of the hydroxyl radical. The material showed high stability after five uses with the same rate of photo-discoloration. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:158 / 167
页数:10
相关论文
共 66 条
[1]   The advancements in sol-gel method of doped-TiO2 photocatalysts [J].
Akpan, U. G. ;
Hameed, B. H. .
APPLIED CATALYSIS A-GENERAL, 2010, 375 (01) :1-11
[2]   Advanced oxidation of a reactive dyebath effluent:: comparison of O3, H2O2/UV-C and TiO2/UV-A processes [J].
Alaton, IA ;
Balcioglu, IA ;
Bahnemann, DW .
WATER RESEARCH, 2002, 36 (05) :1143-1154
[3]   Dye decolorization test for the activity assessment of visible light photocatalysts: Realities and limitations [J].
Bae, Sugyeong ;
Kim, Sujeong ;
Lee, Seockheon ;
Choi, Wonyong .
CATALYSIS TODAY, 2014, 224 :21-28
[4]   Synthesis, characterization and application of bismuth and boron Co-doped TiO2: A visible light active photocatalyst [J].
Bagwasi, Segomotso ;
Tian, Baozhu ;
Zhang, Jinlong ;
Nasir, Muhammad .
CHEMICAL ENGINEERING JOURNAL, 2013, 217 :108-118
[5]   The study of visible light active bismuth modified nitrogen doped titanium dioxide photocatlysts: Role of bismuth [J].
Bagwasi, Segomotso ;
Niu, Yuxiao ;
Nasir, Muhammad ;
Tian, Baozhu ;
Zhang, Jinlong .
APPLIED SURFACE SCIENCE, 2013, 264 :139-147
[6]   Influence of microwave radiation on the textural properties of layered double hydroxides [J].
Benito, P. ;
LabajoS, F. M. ;
Rocha, J. ;
Rives, V. .
MICROPOROUS AND MESOPOROUS MATERIALS, 2006, 94 (1-3) :148-158
[7]   Photocatalytic decolourization of indigo carmine on 1,10-phenanthrolinium intercalated bentonite under UV-B and solar irradiation [J].
Bentouami, Abdelhadi ;
Ouali, Mohand Said ;
De Menorval, Louis-Charles .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2010, 212 (2-3) :101-106
[8]   Influence of calcination on the adsorptive removal of phosphate by Zn-Al layered double hydroxides from excess sludge liquor [J].
Cheng, Xiang ;
Huang, Xinrui ;
Wang, Xingzu ;
Sun, Dezhi .
JOURNAL OF HAZARDOUS MATERIALS, 2010, 177 (1-3) :516-523
[9]  
Chowdhury P.R., 2013, CHEM SCI T, V2, P865
[10]   Band structure and visible light photocatalytic activity of multi-type nitrogen doped TiO2 nanoparticles prepared by thermal decomposition [J].
Dong, Fan ;
Zhao, Weirong ;
Wu, Zhongbiao ;
Guo, Sen .
JOURNAL OF HAZARDOUS MATERIALS, 2009, 162 (2-3) :763-770