Aqueous degradation of diclofenac by heterogeneous photocatalysis using nanostructured materials
[Display omitted] ► A detailed mechanism is proposed for the photocatalytic degradation of diclofenac. ► The efficacy of nanostructured materials, including composites MWCNT–TiO2 is discussed. ► The mechanism of action of MWCNT–TiO2 composites is analyzed. ► The effects of the variables affecting th...
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| Veröffentlicht in: | Applied catalysis. B, Environmental Environmental, 2011-08, Vol.107 (1-2), p.110-118 |
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| container_title | Applied catalysis. B, Environmental |
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| creator | Martínez, C. Canle L., M. Fernández, M.I. Santaballa, J.A. Faria, J. |
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► A detailed mechanism is proposed for the photocatalytic degradation of diclofenac. ► The efficacy of nanostructured materials, including composites MWCNT–TiO2 is discussed. ► The mechanism of action of MWCNT–TiO2 composites is analyzed. ► The effects of the variables affecting the process are discussed.
The photocatalytic degradation of diclofenac (DIC), 2-[2′, 6′-(dichlorophenyl)amino]phenylacetic acid is investigated under near UV–Vis and UV irradiation, using commercial TiO2 P25, synthesized TiO2 (anatase and rutile) and functionalized multi-walled carbon nanotube (MWCNTox): anatase (10-MWCNTox–TiO2) suspensions as catalysts. Factors affecting the kinetics of the process, such as the type and load of photocatalyst, and the presence of dissolved O2, or addition of H2O2 as co-oxidant have been compared. The degradation under UV irradiation is more effective than under near UV–Vis. Optimal conditions for a complete removal were obtained using synthesized anatase (0.5gL−1) and 50% O2 (v/v) under UV irradiation, with rate constants ca. 0.9min−1 (half-life time ca. 0.8min). Eight photoproducts were observed from DIC photodegradation, mainly corresponding to photocyclisation (2-(8-chloro-9H-carbazol-1-yl)acetic acid, 1-chloro-8-methyl-9H-carbazole), decarboxylation (2,6-dichloro-N-o-tolylbenzenamine) and dehalogenation. |
| doi_str_mv | 10.1016/j.apcatb.2011.07.003 |
| format | Article |
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► A detailed mechanism is proposed for the photocatalytic degradation of diclofenac. ► The efficacy of nanostructured materials, including composites MWCNT–TiO2 is discussed. ► The mechanism of action of MWCNT–TiO2 composites is analyzed. ► The effects of the variables affecting the process are discussed.
The photocatalytic degradation of diclofenac (DIC), 2-[2′, 6′-(dichlorophenyl)amino]phenylacetic acid is investigated under near UV–Vis and UV irradiation, using commercial TiO2 P25, synthesized TiO2 (anatase and rutile) and functionalized multi-walled carbon nanotube (MWCNTox): anatase (10-MWCNTox–TiO2) suspensions as catalysts. Factors affecting the kinetics of the process, such as the type and load of photocatalyst, and the presence of dissolved O2, or addition of H2O2 as co-oxidant have been compared. The degradation under UV irradiation is more effective than under near UV–Vis. Optimal conditions for a complete removal were obtained using synthesized anatase (0.5gL−1) and 50% O2 (v/v) under UV irradiation, with rate constants ca. 0.9min−1 (half-life time ca. 0.8min). Eight photoproducts were observed from DIC photodegradation, mainly corresponding to photocyclisation (2-(8-chloro-9H-carbazol-1-yl)acetic acid, 1-chloro-8-methyl-9H-carbazole), decarboxylation (2,6-dichloro-N-o-tolylbenzenamine) and dehalogenation.</description><identifier>ISSN: 0926-3373</identifier><identifier>EISSN: 1873-3883</identifier><identifier>DOI: 10.1016/j.apcatb.2011.07.003</identifier><language>eng</language><publisher>Kidlington: Elsevier B.V</publisher><subject>Anatase ; Carbon nanotubes ; Catalysis ; Chemistry ; Decarboxylation ; Degradation ; Diclofenac ; Exact sciences and technology ; General and physical chemistry ; Heterogeneous photocatalysis ; Irradiation ; Persistent organic pollutants (POPs) ; Pharmaceuticals and personal care products (PPCPs) ; Photocatalysis ; Photochemistry ; Physical chemistry of induced reactions (with radiations, particles and ultrasonics) ; Reaction mechanisms ; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry ; Titanium dioxide</subject><ispartof>Applied catalysis. B, Environmental, 2011-08, Vol.107 (1-2), p.110-118</ispartof><rights>2011 Elsevier B.V.</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c467t-b89a7c1f681e7790c15888c98d1b432be1d44130bd1b8dd1f4a5eb93c8cc33933</citedby><cites>FETCH-LOGICAL-c467t-b89a7c1f681e7790c15888c98d1b432be1d44130bd1b8dd1f4a5eb93c8cc33933</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.apcatb.2011.07.003$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3536,27903,27904,45974</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=24524389$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Martínez, C.</creatorcontrib><creatorcontrib>Canle L., M.</creatorcontrib><creatorcontrib>Fernández, M.I.</creatorcontrib><creatorcontrib>Santaballa, J.A.</creatorcontrib><creatorcontrib>Faria, J.</creatorcontrib><title>Aqueous degradation of diclofenac by heterogeneous photocatalysis using nanostructured materials</title><title>Applied catalysis. B, Environmental</title><description>[Display omitted]
► A detailed mechanism is proposed for the photocatalytic degradation of diclofenac. ► The efficacy of nanostructured materials, including composites MWCNT–TiO2 is discussed. ► The mechanism of action of MWCNT–TiO2 composites is analyzed. ► The effects of the variables affecting the process are discussed.
The photocatalytic degradation of diclofenac (DIC), 2-[2′, 6′-(dichlorophenyl)amino]phenylacetic acid is investigated under near UV–Vis and UV irradiation, using commercial TiO2 P25, synthesized TiO2 (anatase and rutile) and functionalized multi-walled carbon nanotube (MWCNTox): anatase (10-MWCNTox–TiO2) suspensions as catalysts. Factors affecting the kinetics of the process, such as the type and load of photocatalyst, and the presence of dissolved O2, or addition of H2O2 as co-oxidant have been compared. The degradation under UV irradiation is more effective than under near UV–Vis. Optimal conditions for a complete removal were obtained using synthesized anatase (0.5gL−1) and 50% O2 (v/v) under UV irradiation, with rate constants ca. 0.9min−1 (half-life time ca. 0.8min). Eight photoproducts were observed from DIC photodegradation, mainly corresponding to photocyclisation (2-(8-chloro-9H-carbazol-1-yl)acetic acid, 1-chloro-8-methyl-9H-carbazole), decarboxylation (2,6-dichloro-N-o-tolylbenzenamine) and dehalogenation.</description><subject>Anatase</subject><subject>Carbon nanotubes</subject><subject>Catalysis</subject><subject>Chemistry</subject><subject>Decarboxylation</subject><subject>Degradation</subject><subject>Diclofenac</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Heterogeneous photocatalysis</subject><subject>Irradiation</subject><subject>Persistent organic pollutants (POPs)</subject><subject>Pharmaceuticals and personal care products (PPCPs)</subject><subject>Photocatalysis</subject><subject>Photochemistry</subject><subject>Physical chemistry of induced reactions (with radiations, particles and ultrasonics)</subject><subject>Reaction mechanisms</subject><subject>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><subject>Titanium dioxide</subject><issn>0926-3373</issn><issn>1873-3883</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNp9kMFqGzEQhkVpoa7bN-hhLyG97Ga0ki3tJRBCmwQCuTRnRTuadWTWK0fSFvz2leOQY06D4Pv1z3yM_eTQcODri21j92hz37TAeQOqARCf2IJrJWqhtfjMFtC161oIJb6ybyltAaAVrV6wp6uXmcKcKkebaJ3NPkxVGCrncQwDTRar_lA9U6YYNjS9ovvnkEPps-Mh-VTNyU-barJTSDnOmOdIrtrZkvB2TN_Zl6EM-vE2l-zxz--_17f1_cPN3fXVfY1yrXLd684q5MNac1KqA-QrrTV22vFeirYn7qTkAvry1s7xQdoV9Z1AjShEJ8SSnZ_-3cdQTkrZ7HxCGkf7urTRheEA8kj--pDkSineKqWhoPKEYgwpRRrMPvqdjQfDwRzVm605qTdH9QaUKepL7OytwSa04xDthD69Z1u5aqUoCy3Z5YmjIuafp2gSepqQnI-E2bjgPy76DxKynWU</recordid><startdate>20110831</startdate><enddate>20110831</enddate><creator>Martínez, C.</creator><creator>Canle L., M.</creator><creator>Fernández, M.I.</creator><creator>Santaballa, J.A.</creator><creator>Faria, J.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7SU</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope><scope>L7M</scope><scope>7ST</scope><scope>7TV</scope><scope>SOI</scope></search><sort><creationdate>20110831</creationdate><title>Aqueous degradation of diclofenac by heterogeneous photocatalysis using nanostructured materials</title><author>Martínez, C. ; Canle L., M. ; Fernández, M.I. ; Santaballa, J.A. ; Faria, J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c467t-b89a7c1f681e7790c15888c98d1b432be1d44130bd1b8dd1f4a5eb93c8cc33933</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Anatase</topic><topic>Carbon nanotubes</topic><topic>Catalysis</topic><topic>Chemistry</topic><topic>Decarboxylation</topic><topic>Degradation</topic><topic>Diclofenac</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>Heterogeneous photocatalysis</topic><topic>Irradiation</topic><topic>Persistent organic pollutants (POPs)</topic><topic>Pharmaceuticals and personal care products (PPCPs)</topic><topic>Photocatalysis</topic><topic>Photochemistry</topic><topic>Physical chemistry of induced reactions (with radiations, particles and ultrasonics)</topic><topic>Reaction mechanisms</topic><topic>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</topic><topic>Titanium dioxide</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Martínez, C.</creatorcontrib><creatorcontrib>Canle L., M.</creatorcontrib><creatorcontrib>Fernández, M.I.</creatorcontrib><creatorcontrib>Santaballa, J.A.</creatorcontrib><creatorcontrib>Faria, J.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Environmental Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Environment Abstracts</collection><collection>Pollution Abstracts</collection><collection>Environment Abstracts</collection><jtitle>Applied catalysis. B, Environmental</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Martínez, C.</au><au>Canle L., M.</au><au>Fernández, M.I.</au><au>Santaballa, J.A.</au><au>Faria, J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Aqueous degradation of diclofenac by heterogeneous photocatalysis using nanostructured materials</atitle><jtitle>Applied catalysis. B, Environmental</jtitle><date>2011-08-31</date><risdate>2011</risdate><volume>107</volume><issue>1-2</issue><spage>110</spage><epage>118</epage><pages>110-118</pages><issn>0926-3373</issn><eissn>1873-3883</eissn><abstract>[Display omitted]
► A detailed mechanism is proposed for the photocatalytic degradation of diclofenac. ► The efficacy of nanostructured materials, including composites MWCNT–TiO2 is discussed. ► The mechanism of action of MWCNT–TiO2 composites is analyzed. ► The effects of the variables affecting the process are discussed.
The photocatalytic degradation of diclofenac (DIC), 2-[2′, 6′-(dichlorophenyl)amino]phenylacetic acid is investigated under near UV–Vis and UV irradiation, using commercial TiO2 P25, synthesized TiO2 (anatase and rutile) and functionalized multi-walled carbon nanotube (MWCNTox): anatase (10-MWCNTox–TiO2) suspensions as catalysts. Factors affecting the kinetics of the process, such as the type and load of photocatalyst, and the presence of dissolved O2, or addition of H2O2 as co-oxidant have been compared. The degradation under UV irradiation is more effective than under near UV–Vis. Optimal conditions for a complete removal were obtained using synthesized anatase (0.5gL−1) and 50% O2 (v/v) under UV irradiation, with rate constants ca. 0.9min−1 (half-life time ca. 0.8min). Eight photoproducts were observed from DIC photodegradation, mainly corresponding to photocyclisation (2-(8-chloro-9H-carbazol-1-yl)acetic acid, 1-chloro-8-methyl-9H-carbazole), decarboxylation (2,6-dichloro-N-o-tolylbenzenamine) and dehalogenation.</abstract><cop>Kidlington</cop><pub>Elsevier B.V</pub><doi>10.1016/j.apcatb.2011.07.003</doi><tpages>9</tpages></addata></record> |
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| subjects | Anatase Carbon nanotubes Catalysis Chemistry Decarboxylation Degradation Diclofenac Exact sciences and technology General and physical chemistry Heterogeneous photocatalysis Irradiation Persistent organic pollutants (POPs) Pharmaceuticals and personal care products (PPCPs) Photocatalysis Photochemistry Physical chemistry of induced reactions (with radiations, particles and ultrasonics) Reaction mechanisms Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry Titanium dioxide |
| title | Aqueous degradation of diclofenac by heterogeneous photocatalysis using nanostructured materials |
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