Fabrication, characterization and photocatalytic activity of Gd3+-doped titania nanoparticles with mesostructure

被引：46

作者：

Zhao, De ^{[1
]}

Peng, Tianyou ^{[1
,2
]}

Liu, Min ^{[1
]}

Lu, Lanlan ^{[1
]}

Cai, Ping ^{[1
]}

机构：

[1] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China

[2] Peking Univ, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2008年 / 114卷 / 1-3期

关键词：

Gd-doping; mesostructure; nanoparticle; Titania; photocatalysis;

D O I：

10.1016/j.micromeso.2008.01.001

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Gd3+-doped mesoporous TiO2 (m-TiO2) nanoparticles were synthesized via hydrothermal process by using cetyltrimethylammonium bromide (CTAB) as surfactant-directing agent and pore-forming agent. The resulting products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), diffuse reflection spectra (DRS), and linear sweep voltammetry (LSV) etc. Experimental results indicate that different Gd3+-doping levels make great impact on the photocatalytic activity of the obtained m-TiO2 nanoparticles and the 3.5 at.% Gd3+-doped m-TiO2 nanoparticles calcined at 300 degrees C exhibit the optimal photoactivity on the degradation of Rhodamine B (RB), which is as nearly two times as that of the commercial photocatalyst P25. The mesoporosity, anatase wall as well as the cooperativity of 'lattice Gd3+' and 'free Gd3+, in the m-TiO2 nanoparticles can be used to explain the observed high photoactivity of the doped m-TiO2 nanoparticles. (c) 2008 Elsevier Inc. All rights reserved.

引用

页码：166 / 174

页数：9

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