Preparation and characterization of CeO2/TiO2 nanoparticles by flame spray pyrolysis

被引：44

作者：

Chaisuk, Choowong ^{[1
]}

Wehatoranawee, Anusara ^{[1
]}

Preampiyawat, Sirichai ^{[1
]}

Netiphat, Sirirat ^{[1
]}

Shotipruk, Artiwan ^{[2
]}

Panpranot, Joongjai ^{[2
]}

Jongsomjit, Banjerd ^{[2
]}

Mekasuwandumrong, Okorn ^{[1
]}

机构：

[1] Silpakorn Univ, Dept Chem Engn, Fac Engn & Ind Technol, Nakhon Pathom 73000, Thailand

[2] Chulalongkorn Univ, Ctr Excellence Catalysis & Catalyt React Engn, Dept Chem Engn, Fac Engn, Bangkok 10330, Thailand

来源：

CERAMICS INTERNATIONAL | 2011年 / 37卷 / 05期

关键词：

Flame spray pyrolysis; CeO2/TiO2; Nanoparticles; Band-gap; PHOTOCATALYTIC ACTIVITIES; TIO2; PHOTOCATALYSTS; HYDROGENATION; PHENOL; NB;

D O I：

10.1016/j.ceramint.2010.11.018

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nanocrystalline TiO2, CeO2 and CeO2-doped TiO2 have been successfully prepared by one-step flame spray pyrolysis (FSP). Resulting powders were characterized with X-ray diffraction (XRD), N-2-physisorption, Transmission Electron Microscopy (TEM) and UV-Vis spectrophotometry. The TiO2 and CeO2-doped TiO2 nanopowders were composed of single-crystalline spherical particles with as-prepared primary particle size of 10-13 nm for Ce doping concentrations of 5-50 at%, while square-shape particles with average size around 9 nm were only observed from flame-made CeO2. The adsorption edge of resulting powder was shifted from 388 to 467 nm as the Ce content increased from 0 to 30 at% and there was an optimal Ce content in association with the maximum absorbance. This effect is due to the insertion of Ce3+/4+ in the TiO2 matrix, which generated an n-type impurity band. (C) 2010 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：1459 / 1463

页数：5

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