Phenol electrooxidation on Fe-Co3O4 thin film electrodes in alkaline medium
Identifieur interne : 000032 ( Maroc/Analysis ); précédent : 000031; suivant : 000033Phenol electrooxidation on Fe-Co3O4 thin film electrodes in alkaline medium
Auteurs : M. A. M. Cartaxo [Portugal] ; K. Ablad [Maroc] ; J. Douch [Maroc] ; Y. Berghoute [Maroc] ; M. Hamdani [Maroc] ; M. H. Mendonca [Portugal] ; J. M. F. Nogueira [Portugal] ; M. I. S. Pereira [Portugal]Source :
- Chemosphere : (Oxford) [ 0045-6535 ] ; 2012.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Fer.
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Abstract
Fe-CO3O4 thin film with different amounts of Fe have been used for the electro-oxidation of phenol in alkaline medium at room temperature. The electrodes were prepared by coating stainless steel supports with successive layers of the oxides, obtained by thermal decomposition at 673 K. The electrolysis was carried out at constant potential and the phenol disappearance, during the electrolysis, was monitored by UV-Vis absorbance measurements between 250 and 500 nm. After 3 h of electrolysis, the intermediates were identified by comparing the HPLC data and UV-Vis spectra to those from pure standards. The results indicate that the same oxidation products are formed on the different prepared electrodes, namely the decomposition products of phenol such as benzoquinone, hydroquinone and cathecol in basic medium. Simulated results show clearly the decrease of the amount of phenolic species with the electrolysis time. An enhancement of the phenol removal is observed with the presence of iron in the oxide. Under the operating conditions, around 30% of the initial phenol has been removed at ca. 3 h and the complete degradation is obtained after 54 h of electrolysis, when Fe-Co3O4 thin film with 10% of Fe is used as anode.
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A. M." last="Cartaxo">M. A. M. Cartaxo</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Deportamento de Engenharia Química e do Ambiente, Escola Superior de Tecnologia do Instituto Politécnico de Tomar, Estrada do Serra</s1><s2>2300-313 Tomar</s2><s3>PRT</s3><sZ>1 aut.</sZ></inist:fA14><country>Portugal</country><wicri:noRegion>2300-313 Tomar</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Centro de Ciências Moleculares e Materials, Faculdade de Ciencias da Universidade de Lisboa</s1><s3>PRT</s3><sZ>1 aut.</sZ><sZ>6 aut.</sZ><sZ>8 aut.</sZ></inist:fA14><country>Portugal</country><wicri:noRegion>Centro de Ciências Moleculares e Materials, Faculdade de Ciencias da Universidade de Lisboa</wicri:noRegion></affiliation></author><author><name sortKey="Ablad, K" sort="Ablad, K" uniqKey="Ablad K" first="K." last="Ablad">K. Ablad</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Loboratoire de Chimie Physique, Faculté des Sciences, Université Ibn Zohr, B.P. 8106/S Cité Dakhla</s1><s2>Agadir</s2><s3>MAR</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Maroc</country><wicri:noRegion>Agadir</wicri:noRegion></affiliation></author><author><name sortKey="Douch, J" sort="Douch, J" uniqKey="Douch J" first="J." last="Douch">J. Douch</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Loboratoire de Chimie Physique, Faculté des Sciences, Université Ibn Zohr, B.P. 8106/S Cité Dakhla</s1><s2>Agadir</s2><s3>MAR</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Maroc</country><wicri:noRegion>Agadir</wicri:noRegion></affiliation></author><author><name sortKey="Berghoute, Y" sort="Berghoute, Y" uniqKey="Berghoute Y" first="Y." last="Berghoute">Y. Berghoute</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Loboratoire de Chimie Physique, Faculté des Sciences, Université Ibn Zohr, B.P. 8106/S Cité Dakhla</s1><s2>Agadir</s2><s3>MAR</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Maroc</country><wicri:noRegion>Agadir</wicri:noRegion></affiliation></author><author><name sortKey="Hamdani, M" sort="Hamdani, M" uniqKey="Hamdani M" first="M." last="Hamdani">M. Hamdani</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Loboratoire de Chimie Physique, Faculté des Sciences, Université Ibn Zohr, B.P. 8106/S Cité Dakhla</s1><s2>Agadir</s2><s3>MAR</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Maroc</country><wicri:noRegion>Agadir</wicri:noRegion></affiliation></author><author><name sortKey="Mendonca, M H" sort="Mendonca, M H" uniqKey="Mendonca M" first="M. H." last="Mendonca">M. H. Mendonca</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Centro de Ciências Moleculares e Materials, Faculdade de Ciencias da Universidade de Lisboa</s1><s3>PRT</s3><sZ>1 aut.</sZ><sZ>6 aut.</sZ><sZ>8 aut.</sZ></inist:fA14><country>Portugal</country><wicri:noRegion>Centro de Ciências Moleculares e Materials, Faculdade de Ciencias da Universidade de Lisboa</wicri:noRegion></affiliation></author><author><name sortKey="Nogueira, J M F" sort="Nogueira, J M F" uniqKey="Nogueira J" first="J. M. F." last="Nogueira">J. M. F. Nogueira</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Centro de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa</s1><s3>PRT</s3><sZ>7 aut.</sZ></inist:fA14><country>Portugal</country><wicri:noRegion>Centro de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa</wicri:noRegion></affiliation></author><author><name sortKey="Pereira, M I S" sort="Pereira, M I S" uniqKey="Pereira M" first="M. I. S." last="Pereira">M. I. S. Pereira</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Centro de Ciências Moleculares e Materials, Faculdade de Ciencias da Universidade de Lisboa</s1><s3>PRT</s3><sZ>1 aut.</sZ><sZ>6 aut.</sZ><sZ>8 aut.</sZ></inist:fA14><country>Portugal</country><wicri:noRegion>Centro de Ciências Moleculares e Materials, Faculdade de Ciencias da Universidade de Lisboa</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Chemosphere : (Oxford)</title><title level="j" type="abbreviated">Chemosphere : (Oxf.)</title><idno type="ISSN">0045-6535</idno><imprint><date when="2012">2012</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Chemosphere : (Oxford)</title><title level="j" type="abbreviated">Chemosphere : (Oxf.)</title><idno type="ISSN">0045-6535</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Cobalt oxide</term><term>Decontamination</term><term>Electrochemical reaction</term><term>Electrochemical treatment</term><term>Electrode material</term><term>Electrolysis</term><term>Industrial waste water</term><term>Iron</term><term>Oxidation</term><term>Phenols</term><term>Physicochemical purification</term><term>Thin layer electrode</term><term>Waste water purification</term><term>Water pollution</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Phénols</term><term>Oxydation</term><term>Réaction électrochimique</term><term>Oxyde de cobalt</term><term>Fer</term><term>Pollution eau</term><term>Décontamination</term><term>Eau usée industrielle</term><term>Epuration eau usée</term><term>Epuration physicochimique</term><term>Matériau électrode</term><term>Electrode couche mince</term><term>Electrolyse</term><term>Traitement électrochimique</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Fer</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Fe-CO3O4 thin film with different amounts of Fe have been used for the electro-oxidation of phenol in alkaline medium at room temperature. The electrodes were prepared by coating stainless steel supports with successive layers of the oxides, obtained by thermal decomposition at 673 K. The electrolysis was carried out at constant potential and the phenol disappearance, during the electrolysis, was monitored by UV-Vis absorbance measurements between 250 and 500 nm. After 3 h of electrolysis, the intermediates were identified by comparing the HPLC data and UV-Vis spectra to those from pure standards. The results indicate that the same oxidation products are formed on the different prepared electrodes, namely the decomposition products of phenol such as benzoquinone, hydroquinone and cathecol in basic medium. Simulated results show clearly the decrease of the amount of phenolic species with the electrolysis time. An enhancement of the phenol removal is observed with the presence of iron in the oxide. Under the operating conditions, around 30% of the initial phenol has been removed at ca. 3 h and the complete degradation is obtained after 54 h of electrolysis, when Fe-Co<sub>3</sub>O<sub>4</sub> thin film with 10% of Fe is used as anode.</div></front></TEI><affiliations><list><country><li>Maroc</li><li>Portugal</li></country></list><tree><country name="Portugal"><noRegion><name sortKey="Cartaxo, M A M" sort="Cartaxo, M A M" uniqKey="Cartaxo M" first="M. A. M." last="Cartaxo">M. A. M. Cartaxo</name></noRegion><name sortKey="Cartaxo, M A M" sort="Cartaxo, M A M" uniqKey="Cartaxo M" first="M. A. M." last="Cartaxo">M. A. M. Cartaxo</name><name sortKey="Mendonca, M H" sort="Mendonca, M H" uniqKey="Mendonca M" first="M. H." last="Mendonca">M. H. Mendonca</name><name sortKey="Nogueira, J M F" sort="Nogueira, J M F" uniqKey="Nogueira J" first="J. M. F." last="Nogueira">J. M. F. Nogueira</name><name sortKey="Pereira, M I S" sort="Pereira, M I S" uniqKey="Pereira M" first="M. I. S." last="Pereira">M. I. S. Pereira</name></country><country name="Maroc"><noRegion><name sortKey="Ablad, K" sort="Ablad, K" uniqKey="Ablad K" first="K." last="Ablad">K. Ablad</name></noRegion><name sortKey="Berghoute, Y" sort="Berghoute, Y" uniqKey="Berghoute Y" first="Y." last="Berghoute">Y. Berghoute</name><name sortKey="Douch, J" sort="Douch, J" uniqKey="Douch J" first="J." last="Douch">J. Douch</name><name sortKey="Hamdani, M" sort="Hamdani, M" uniqKey="Hamdani M" first="M." last="Hamdani">M. Hamdani</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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