Photocatalytic activity under visible light of Fe-doped CeO2 nanoparticles synthesized by flame spray pyrolysis

被引：93

作者：

Channei, D. ^{[1
,4
]}

Inceesungvorn, B. ^{[1
]}

Wetchakun, N. ^{[2
]}

Phanichphant, S. ^{[3
]}

Nakaruk, A. ^{[4
]}

Koshy, P. ^{[4
]}

Sorrell, C. C. ^{[4
]}

机构：

[1] Chiang Mai Univ, Fac Sci, Dept Chem, Chiang Mai 50200, Thailand

[2] Chiang Mai Univ, Fac Sci, Dept Phys & Mat Sci, Chiang Mai 50200, Thailand

[3] Chiang Mai Univ, Fac Sci, Mat Sci Res Ctr, Chiang Mai 50200, Thailand

[4] Univ New S Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia

来源：

CERAMICS INTERNATIONAL | 2013年 / 39卷 / 03期

关键词：

CeO2; Nanoparticles; Flame Spray Pyrolysis; Photocatalytic Activity; MAGNETIC-PROPERTIES; DEGRADATION; SIZE; ADSORPTION; PARTICLE; TIO2; ACID; ZNO;

D O I：

10.1016/j.ceramint.2012.09.093

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：

CeO2 nanoparticles (undoped and Fe-doped) were synthesised using flame spray pyrolysis with varying Fe-dopant concentrations. X-ray diffraction analysis revealed the absence of any impurity phases in all samples. BET (Brunauer, Emmett and Teller) tests showed that the average sizes of undoped and Fe-doped CeO2 particles were 6.39 and 5.94 nm, respectively. Specific surface area of the particles increased with increasing Fe-dopant concentration. High resolution transmission electron microscopy (HRTEM) revealed that the nanoparticles were either spherical or equiaxed in shape. UV-vis spectroscopy showed a shift of the adsorption edge towards longer wavelengths along with a decrease in the optical indirect band gap from 3.18 to 2.90 eV for undoped particles and 2 mol% Fe-doped particles. In terms of photocatalytic performance, Fe-doped CeO2 nanoparticles were responsible for an increased degradation of the carbpn from formic and oxalic acids. Furthermore, the photocatalytic efficiency was similar to 100% when 2 mol% Fe-doped CeO2 particles were used for testing. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：3129 / 3134

页数：6

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