Gadolinium oxide decorated multiwalled carbon nanotube/tridoped titania nanocomposites for improved dye degradation under simulated solar light irradiation

被引：12
作者：
Mamba, Gcina [1 ,2 ]
Mbianda, Xavier Yangkou [1 ]
Mishra, Ajay Kumar [2 ]
机构：
[1] Univ Johannesburg, Fac Sci, Dept Appl Chem, ZA-2028 Doornfontein, South Africa
[2] Univ S Africa, Coll Engn Sci & Technol, Nanotechnol & Water Sustainabil Res Unit, ZA-1709 Florida, South Africa
来源：
MATERIALS RESEARCH BULLETIN | 2016年 / 75卷
关键词：
semiconductors; nanostructures; sol-gel chemistry; optical properties; S-CODOPED TIO2; ENHANCED PHOTOCATALYTIC ACTIVITY; DOPED TIO2; NITROGEN; WATER; BLUE; COMPOSITES; NANOTUBES; REMOVAL; DIOXIDE;
D O I：
10.1016/j.materresbull.2015.11.030
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Neodymium/gadolinium/europium, nitrogen and sulphur tridoped titania (Nd/Gd/Eu, N,S-TiO2) was hybridised with pre-synthesised gadolinium oxide decorated multiwalled carbon nanotubes (MWCNT-Gd) using a sol-gel method. Subsequent to drying and calcination, composite photocatalysts: MWCNT-Gd/Nd,N,S-TiO2, MWCNT-Gd/Gd,N,S-TiO2 and MWCNT-Gd/Eu,N,S-TiO2, were obtained and characterised using TEM, SEM-EDX, UV-vis, XPS, XRD and FT-IR. Acid blue 74 (AB74) was used as a model dye to investigate the photocatalytic degradation properties of the prepared materials under simulated solar light irradiation. Coupling the different tridoped titania with MWCNT-Gd enhanced their activity compared to MWCNT/TiO2, MWCNT-Gd/TiO2 and MWCNT/Gd,N,S-TiO2. MWCNT-Gd/Gd,N,S-TiO2 showed the highest activity towards AB74 degradation reaching 100% decolourisation after 150 min of irradiation. Total organic carbon analysis revealed that over 50% of the AB74 molecules were completely mineralised after 180 min of irradiation in the presence of MWCNT-Gd/Gd,N,S-TiO2. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：59 / 70
页数：12
相关论文
共 42 条
[1]   Visible light photo-induced antibacterial activity of CNT-doped TiO2 thin films with various CNT contents [J].
Akhavan, O. ;
Azimirad, R. ;
Safa, S. ;
Larijani, M. M. .
JOURNAL OF MATERIALS CHEMISTRY, 2010, 20 (35) :7386-7392
[2]   Combined effects of molasses sucrose and reactive dye on the growth and dye bioaccumulation properties of Candida tropicalis [J].
Aksu, Z ;
Dönmez, G .
PROCESS BIOCHEMISTRY, 2005, 40 (07) :2443-2454
[3]   Nanostructured, gd-doped ceria promoted by Pt or Pd: Investigation of the electronic and surface structures and relations to chemical properties [J].
Borchert, H ;
Borchert, Y ;
Kaichev, VV ;
Prosvirin, IP ;
Alikina, GM ;
Lukashevich, AI ;
Zaikovskii, VI ;
Moroz, EM ;
Paukshtis, EA ;
Bukhtiyarov, VI ;
Sadykov, VA .
JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (43) :20077-20086
[4]   Effect of Ce, N and S multi-doping on the photocatalytic activity of TiO2 [J].
Charanpahari, A. ;
Umare, S. S. ;
Sasikala, R. .
APPLIED SURFACE SCIENCE, 2013, 282 :408-414
[5]   Enhanced photocatalytic activity of multi-doped TiO2 for the degradation of methyl orange [J].
Charanpahari, A. ;
Umare, S. S. ;
Gokhale, S. P. ;
Sudarsan, V. ;
Sreedhar, B. ;
Sasikala, R. .
APPLIED CATALYSIS A-GENERAL, 2012, 443 :96-102
[6]   Carbon-doped TiO2 coating on multiwalled carbon nanotubes with higher visible light photocatalytic activity [J].
Cong, Ye ;
Li, Xuanke ;
Qin, Yun ;
Dong, Zhijun ;
Yuan, Guanming ;
Cui, Zhengwei ;
Lai, Xiaojun .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2011, 107 (1-2) :128-134
[7]   A review on non metal ion doped titania for the photocatalytic degradation of organic pollutants under UV/solar light: Role of photogenerated charge carrier dynamics in enhancing the activity [J].
Devi, L. Gomathi ;
Kavitha, R. .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2013, 140 :559-587
[8]   Visible-light-driven N-F-codoped TiO2 powders derived from different ammonium oxofluorotitanate precursors [J].
Hojamberdiev, Mirabbos ;
Zhu, Gangqiang ;
Sujaridworakun, Pornapa ;
Jinawath, Supatra ;
Liu, Peng ;
Zhou, Jian-Ping .
POWDER TECHNOLOGY, 2012, 218 :140-148
[9]   Enhanced Photocatalytic Activity of Chemically Bonded TiO2/Graphene Composites Based on the Effective Interfacial Charge Transfer through the C-Ti Bond [J].
Huang, Qingwu ;
Tian, Shouqin ;
Zeng, Dawen ;
Wang, Xiaoxia ;
Song, Wulin ;
Li, Yingying ;
Xiao, Wei ;
Xie, Changsheng .
ACS CATALYSIS, 2013, 3 (07) :1477-1485
[10]   Effect of carbon doping on the mesoporous structure of nanocrystalline titanium dioxide and its solar-light-driven photocatalytic degradation of NOx [J].
Huang, Yu ;
Ho, Wingkei ;
Lee, Shuncheng ;
Zhang, Lizhi ;
Li, Guisheng ;
Yu, Jimmy C. .
LANGMUIR, 2008, 24 (07) :3510-3516
12345