Hierarchical Gd-La codoped TiO2 microspheres as robust photocatalysts

被引：33

作者：

Lin, Lin ^{[1
]}

Chai, Yuchao ^{[2
]}

Yang, Yingchao ^{[3
]}

Wang, Xin ^{[4
]}

He, Dannong ^{[1
,2
]}

Tang, Qunwei ^{[4
]}

Ghoshroy, Soumitra ^{[3
]}

机构：

[1] Natl Engn Res Ctr Nanotechnol, Shanghai 200241, Peoples R China

[2] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China

[3] Univ S Carolina, Ctr Electron Microscopy, Columbia, SC 29208 USA

[4] Ocean Univ China, Inst Mat Sci & Engn, Qingdao 266100, Shandong Provin, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2013年 / 38卷 / 06期

关键词：

Photocatalysts; Microspheres; Semiconductors; TiO2; Photodegradation; HOLLOW MICROSPHERES; VISIBLE-LIGHT;

D O I：

10.1016/j.ijhydene.2012.11.100

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：

Robust Gd-La codoped TiO2 microspheres with diameter of 2 similar to 3 mu m were successfully synthesized via a hydrothermal method using poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) as a template. The photocatalytic activity of the Gd-La codoped TiO2 microspheres evaluated by photodegrading methyl orange (MO) has been significantly enhanced compared to that of undoped TiO2 microspheres. Ti4+ may substitute for La3+ and Gd3+ in the lattices of rare earth oxides to create abundant oxygen vacancies and surface defects for electron trapping and dye adsorption, accelerating the separation of photogenerated electron-hole pairs and MO photodegradation. The formation of an exciton energy level below the conduction band of TiO2 from the binding of electrons and oxygen vacancies decreases the excitation energy of Gd-La codoped TiO2 microspheres, resulting in robust photocatalysts. The results suggest that Gd-La codoped TiO2 microspheres calcined at 350 degrees C. are very promising for enhancing the photocatalytic activity of photocatalysts. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：2634 / 2640

页数：7

共 18 条

[1] Synthesis of floriated In2S3 decorated with TiO2 nanoparticles for efficient photocatalytic hydrogen production under visible light [J].

Chai, Bo ;

Peng, Tianyou ;

Zeng, Peng ;

Mao, Jin .

JOURNAL OF MATERIALS CHEMISTRY, 2011, 21 (38) :14587-14593

[2] Synthesis and characterization of TiO2-montmorillonites doped with vanadium and/or carbon and their application for the photodegradation of sulphorhodamine B under UV-vis irradiation [J].

Chen, Ke ;

Li, Jingyi ;

Li, Jie ;

Zhang, Yumin ;

Wang, Wenxi .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2010, 360 (1-3) :47-56

[3] Preparation and Visible Light Photocatalytic Activity of a Graphite-Like Carbonaceous Surface Modified TiO2 Photocatalyst [J].

Chen, Lijing ;

Chen, Feng ;

Shi, Yanfen ;

Zhang, Jinlong .

JOURNAL OF PHYSICAL CHEMISTRY C, 2012, 116 (15) :8579-8586

[4] Directed Synthesis of Mesoporous TiO2 Microspheres: Catalysts and Their Photocatalysis for Bisphenol A Degradation [J].

Guo, Changsheng ;

Ge, Ming ;

Liu, Lu ;

Gao, Guandao ;

Feng, Yinchang ;

Wang, Yuqiu .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2010, 44 (01) :419-425

[5] The preparation and characterization of La doped TiO2 nanoparticles and their photocatalytic activity [J].

Jing, LQ ;

Sun, XJ ;

Xin, BF ;

Wang, BQ ;

Cai, WM ;

Fu, HG .

JOURNAL OF SOLID STATE CHEMISTRY, 2004, 177 (10) :3375-3382

[6] Photocatalytic degradation of 2-mercaptobenzothiazole in aqueous La3+-TiO2 suspension for odor control [J].

Li, FB ;

Li, XZ ;

Hou, MF .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2004, 48 (03) :185-194

[7] Tunable Photocatalytic Selectivity of Hollow TiO2 Microspheres Composed of Anatase Polyhedra with Exposed {001} Facets [J].

Liu, Shengwei ;

Yu, Jiaguo ;

Jaroniec, Mietek .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2010, 132 (34) :11914-11916

[8] Hierarchical N-doped TiO2 hollow microspheres consisting of nanothorns with exposed anatase {101} facets [J].

Pan, Jia Hong ;

Han, Gang ;

Zhou, Rui ;

Zhao, X. S. .

CHEMICAL COMMUNICATIONS, 2011, 47 (24) :6942-6944

[9] Synthesis of nanophase TiO2 by ion beam sputtering and cold condensation technique [J].

Saraf, LV ;

Patil, SI ;

Ogale, SB ;

Sainkar, SR ;

Kshirsager, ST .

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 1998, 12 (25) :2635-2647

[10] SIZE EFFECTS ON THE PHOTOPHYSICAL PROPERTIES OF COLLOIDAL ANATASE TIO2 PARTICLES - SIZE QUANTIZATION OR DIRECT TRANSITIONS IN THIS INDIRECT SEMICONDUCTOR [J].

SERPONE, N ;

LAWLESS, D ;

KHAIRUTDINOV, R .

JOURNAL OF PHYSICAL CHEMISTRY, 1995, 99 (45) :16646-16654

← 1 2 →