Synthesis and characterization of Fe-doped CeO2 nanoparticles and their photocatalytic activities

In this research, cerium oxide (CeO2) nanoparticles were synthesized by the homogeneous precipitation. Cerium nitrate hexahydrate and ammonia solution were used as precursors. A mixture of water and ethylene glycol was used as solvent. The ratio of ethylene glycol /water mixed solvent was 80% by vol...

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Main Authors: Duangdao Channei, Natda Wetchakun, Chawarat Siriwong, Sukon Phanichphant
Format: Conference Proceeding
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/50787
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-507872018-09-04T04:45:37Z Synthesis and characterization of Fe-doped CeO2 nanoparticles and their photocatalytic activities Duangdao Channei Natda Wetchakun Chawarat Siriwong Sukon Phanichphant Engineering In this research, cerium oxide (CeO2) nanoparticles were synthesized by the homogeneous precipitation. Cerium nitrate hexahydrate and ammonia solution were used as precursors. A mixture of water and ethylene glycol was used as solvent. The ratio of ethylene glycol /water mixed solvent was 80% by volume of ethylene glycol. Pure CeO2 nanoparticles were yellow powder. Particle size was found to be in the range of 5-6 nm with BET specific surface area of 140.62 m2/g. TGA/DSC was used to find the appropriate temperature for calcination. X-ray diffraction analysis showed that the particles exhibited cubic fluorite structure. Then, cerium oxide nanoparticles were impregnated with ferric nitrate at 0.25, 0.50, 0.75, 1.00, 1.50 and 2.00 mol.% of CeO2 by calcining the mixture at 400 C°. Color of Fe-doped CeO2 became deeper yellow when mol.% Fe increased. Cerium oxide nanoparticles and the doped samples were characterized by using X-ray diffraction (XRD), the Brunauer, Emmett and Teller (BET), Transmission electron microscopy (TEM), Scanning electron microscopy (SEM) and Energy dispersive X-ray spectroscopy analysis (EDS). The photocatalytic activity of pure CeO 2 and Fe-doped CeO2 were investigated for the degradation of oxalic acid and formic acid under visible irradiation using photocatalytic reactor. The effect of Fe on photocatalytic activity of CeO2 nanoparticles was verified. It was found that Fe-doped CeO2 was more effective than pure CeO2. The photocatalytic activity of Fe-doped CeO2 for mineralization of formic acid was better than that of oxalic acid (the mineralization time to degrade formic acid was less than that of oxalic acid). The best result of photocatalytic activity for the degradation of oxalic was obtained from 2.00 mol.% Fe-doped CeO2 nanoparticles. 1.00 mol.% Fe-doped CeO2 demonstated the highest photocatalytic activity for the degradation of formic acid under visible irradiation. The enhanced performance observed for the Fe-doped CeO2 system was likely due to the formation of ferrioxalate and ferriformate complexes which could generate hydroxyl radical. ©2010 IEEE. 2018-09-04T04:45:37Z 2018-09-04T04:45:37Z 2010-11-29 Conference Proceeding 2-s2.0-78649241673 10.1109/NEMS.2010.5592142 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=78649241673&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/50787
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Engineering
spellingShingle Engineering
Duangdao Channei
Natda Wetchakun
Chawarat Siriwong
Sukon Phanichphant
Synthesis and characterization of Fe-doped CeO2 nanoparticles and their photocatalytic activities
description In this research, cerium oxide (CeO2) nanoparticles were synthesized by the homogeneous precipitation. Cerium nitrate hexahydrate and ammonia solution were used as precursors. A mixture of water and ethylene glycol was used as solvent. The ratio of ethylene glycol /water mixed solvent was 80% by volume of ethylene glycol. Pure CeO2 nanoparticles were yellow powder. Particle size was found to be in the range of 5-6 nm with BET specific surface area of 140.62 m2/g. TGA/DSC was used to find the appropriate temperature for calcination. X-ray diffraction analysis showed that the particles exhibited cubic fluorite structure. Then, cerium oxide nanoparticles were impregnated with ferric nitrate at 0.25, 0.50, 0.75, 1.00, 1.50 and 2.00 mol.% of CeO2 by calcining the mixture at 400 C°. Color of Fe-doped CeO2 became deeper yellow when mol.% Fe increased. Cerium oxide nanoparticles and the doped samples were characterized by using X-ray diffraction (XRD), the Brunauer, Emmett and Teller (BET), Transmission electron microscopy (TEM), Scanning electron microscopy (SEM) and Energy dispersive X-ray spectroscopy analysis (EDS). The photocatalytic activity of pure CeO 2 and Fe-doped CeO2 were investigated for the degradation of oxalic acid and formic acid under visible irradiation using photocatalytic reactor. The effect of Fe on photocatalytic activity of CeO2 nanoparticles was verified. It was found that Fe-doped CeO2 was more effective than pure CeO2. The photocatalytic activity of Fe-doped CeO2 for mineralization of formic acid was better than that of oxalic acid (the mineralization time to degrade formic acid was less than that of oxalic acid). The best result of photocatalytic activity for the degradation of oxalic was obtained from 2.00 mol.% Fe-doped CeO2 nanoparticles. 1.00 mol.% Fe-doped CeO2 demonstated the highest photocatalytic activity for the degradation of formic acid under visible irradiation. The enhanced performance observed for the Fe-doped CeO2 system was likely due to the formation of ferrioxalate and ferriformate complexes which could generate hydroxyl radical. ©2010 IEEE.
format Conference Proceeding
author Duangdao Channei
Natda Wetchakun
Chawarat Siriwong
Sukon Phanichphant
author_facet Duangdao Channei
Natda Wetchakun
Chawarat Siriwong
Sukon Phanichphant
author_sort Duangdao Channei
title Synthesis and characterization of Fe-doped CeO2 nanoparticles and their photocatalytic activities
title_short Synthesis and characterization of Fe-doped CeO2 nanoparticles and their photocatalytic activities
title_full Synthesis and characterization of Fe-doped CeO2 nanoparticles and their photocatalytic activities
title_fullStr Synthesis and characterization of Fe-doped CeO2 nanoparticles and their photocatalytic activities
title_full_unstemmed Synthesis and characterization of Fe-doped CeO2 nanoparticles and their photocatalytic activities
title_sort synthesis and characterization of fe-doped ceo2 nanoparticles and their photocatalytic activities
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=78649241673&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/50787
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