Synthesis of molecularly imprinted photocatalysts containing low TiO2 loading: Evaluation for the degradation of pharmaceuticals
•Molecularly imprinted photocatalyst (MIP) containing low TiO2 loading were prepared by acid-catalyzed sol–gel process.•Seven pharmaceutical compounds were evaluated as a template.•Comparing to the P25, MIP has shown an increase of adsorption up to 752%.•Comparing to the P25, MIP has shown an increa...
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| Veröffentlicht in: | Journal of hazardous materials 2016-04, Vol.306, p.359-366 |
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| creator | de Escobar, Cícero Coelho Lansarin, Marla Azário Zimnoch dos Santos, João Henrique |
| description | •Molecularly imprinted photocatalyst (MIP) containing low TiO2 loading were prepared by acid-catalyzed sol–gel process.•Seven pharmaceutical compounds were evaluated as a template.•Comparing to the P25, MIP has shown an increase of adsorption up to 752%.•Comparing to the P25, MIP has shown an increase of degradation up to 427%.•The presence of specific cavities on the silica domain could explain the better results for MIP.
A molecularly imprinted (MI) photocatalyst containing a low TiO2 loading (7.00–16.60mgL−1 of TiO2) was prepared via an acid-catalyzed sol–gel route using different classes of pharmaceutical compounds (i.e., Atorvastatin, Diclofenac, Ibuprofen, Tioconazole, Valsartan, Ketoconazole and Gentamicine) as the template. Herein, our main goal was to test the hypothesis that photocatalysts based on molecular imprinting may improve the degradation performance of pharmaceutical compounds compared to that of a commercial sample (Degussa P25) due to presence of specific cavities in the silica domain. To elucidate certain trends between the performance of photocatalysts and their structural and textural properties, as well the effect of the structure of the drugs on molecular imprinting, the data were analyzed in terms of pore diameter, pore volume, surface area, zeta potential and six-membered ring percentage of silica. In comparison to the commercial sample (P25), we have shown that adsorption and degradation were enhanced from 48 to 752% and from 5 to 427%, respectively. A comparison with the control system (non-imprinted) indicates that the increased performance of the MI systems was due to the presence of specific cavities on the silica domain, and the textural and structural aspects also support this conclusion. The MI photocatalyst was reusable for seven cycles of reuse in which approximately 60% of its photocatalytic efficiency was preserved for the system containing Diclofenac as the template. |
| doi_str_mv | 10.1016/j.jhazmat.2015.11.035 |
| format | Article |
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A molecularly imprinted (MI) photocatalyst containing a low TiO2 loading (7.00–16.60mgL−1 of TiO2) was prepared via an acid-catalyzed sol–gel route using different classes of pharmaceutical compounds (i.e., Atorvastatin, Diclofenac, Ibuprofen, Tioconazole, Valsartan, Ketoconazole and Gentamicine) as the template. Herein, our main goal was to test the hypothesis that photocatalysts based on molecular imprinting may improve the degradation performance of pharmaceutical compounds compared to that of a commercial sample (Degussa P25) due to presence of specific cavities in the silica domain. To elucidate certain trends between the performance of photocatalysts and their structural and textural properties, as well the effect of the structure of the drugs on molecular imprinting, the data were analyzed in terms of pore diameter, pore volume, surface area, zeta potential and six-membered ring percentage of silica. In comparison to the commercial sample (P25), we have shown that adsorption and degradation were enhanced from 48 to 752% and from 5 to 427%, respectively. A comparison with the control system (non-imprinted) indicates that the increased performance of the MI systems was due to the presence of specific cavities on the silica domain, and the textural and structural aspects also support this conclusion. The MI photocatalyst was reusable for seven cycles of reuse in which approximately 60% of its photocatalytic efficiency was preserved for the system containing Diclofenac as the template.</description><identifier>ISSN: 0304-3894</identifier><identifier>EISSN: 1873-3336</identifier><identifier>DOI: 10.1016/j.jhazmat.2015.11.035</identifier><identifier>PMID: 26800507</identifier><language>eng</language><publisher>Netherlands: Elsevier B.V</publisher><subject>Adsorption ; Catalysis ; Degradation ; Diclofenac ; Holes ; Molecular Imprinting ; Pharmaceutical Preparations - chemistry ; Pharmaceuticals ; Photocatalysis ; Photocatalysts ; Photolysis ; Silicon dioxide ; Silicon Dioxide - chemistry ; Titanium - chemistry ; Titanium - radiation effects ; Titanium dioxide ; Ultraviolet Rays</subject><ispartof>Journal of hazardous materials, 2016-04, Vol.306, p.359-366</ispartof><rights>2015 Elsevier B.V.</rights><rights>Copyright © 2015 Elsevier B.V. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jhazmat.2015.11.035$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/26800507$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>de Escobar, Cícero Coelho</creatorcontrib><creatorcontrib>Lansarin, Marla Azário</creatorcontrib><creatorcontrib>Zimnoch dos Santos, João Henrique</creatorcontrib><title>Synthesis of molecularly imprinted photocatalysts containing low TiO2 loading: Evaluation for the degradation of pharmaceuticals</title><title>Journal of hazardous materials</title><addtitle>J Hazard Mater</addtitle><description>•Molecularly imprinted photocatalyst (MIP) containing low TiO2 loading were prepared by acid-catalyzed sol–gel process.•Seven pharmaceutical compounds were evaluated as a template.•Comparing to the P25, MIP has shown an increase of adsorption up to 752%.•Comparing to the P25, MIP has shown an increase of degradation up to 427%.•The presence of specific cavities on the silica domain could explain the better results for MIP.
A molecularly imprinted (MI) photocatalyst containing a low TiO2 loading (7.00–16.60mgL−1 of TiO2) was prepared via an acid-catalyzed sol–gel route using different classes of pharmaceutical compounds (i.e., Atorvastatin, Diclofenac, Ibuprofen, Tioconazole, Valsartan, Ketoconazole and Gentamicine) as the template. Herein, our main goal was to test the hypothesis that photocatalysts based on molecular imprinting may improve the degradation performance of pharmaceutical compounds compared to that of a commercial sample (Degussa P25) due to presence of specific cavities in the silica domain. To elucidate certain trends between the performance of photocatalysts and their structural and textural properties, as well the effect of the structure of the drugs on molecular imprinting, the data were analyzed in terms of pore diameter, pore volume, surface area, zeta potential and six-membered ring percentage of silica. In comparison to the commercial sample (P25), we have shown that adsorption and degradation were enhanced from 48 to 752% and from 5 to 427%, respectively. A comparison with the control system (non-imprinted) indicates that the increased performance of the MI systems was due to the presence of specific cavities on the silica domain, and the textural and structural aspects also support this conclusion. The MI photocatalyst was reusable for seven cycles of reuse in which approximately 60% of its photocatalytic efficiency was preserved for the system containing Diclofenac as the template.</description><subject>Adsorption</subject><subject>Catalysis</subject><subject>Degradation</subject><subject>Diclofenac</subject><subject>Holes</subject><subject>Molecular Imprinting</subject><subject>Pharmaceutical Preparations - chemistry</subject><subject>Pharmaceuticals</subject><subject>Photocatalysis</subject><subject>Photocatalysts</subject><subject>Photolysis</subject><subject>Silicon dioxide</subject><subject>Silicon Dioxide - chemistry</subject><subject>Titanium - chemistry</subject><subject>Titanium - radiation effects</subject><subject>Titanium dioxide</subject><subject>Ultraviolet Rays</subject><issn>0304-3894</issn><issn>1873-3336</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkU9v1DAQxS0EokvhI4B85JIwjp3YywWhqvyRKvVAOVuOPel65cSL7bRaTnx0XO1y5_RGo5_eaN4j5C2DlgEbPuzb_c78nk1pO2B9y1gLvH9GNkxJ3nDOh-dkAxxEw9VWXJBXOe8BgMlevCQX3aAAepAb8ufHcSk7zD7TONE5BrRrMCkcqZ8PyS8FHT3sYonWFBOOuWRq41KMX_xyT0N8pHf-tquDcXXxkV4_mLCa4uNCp5hotaYO75Nxp129cdiZNBuLa_HWhPyavJiq4JuzXpKfX67vrr41N7dfv199vmmQc1kahQJdz6WCQU1CwWiFUoYDd1y6SaAUox3kIEfFzIB27Awo1VmrFLCtZR2_JO9PvocUf62Yi559thiCWTCuWTOp-q7ngqv_QOVWKSmAV_TdGV3HGZ2ukc0mHfW_gCvw6QRg_e3BY9LZelwsOp_QFu2i1wz0U6V6r8-V6qdKNWO6Vsr_AlUhl0w</recordid><startdate>20160405</startdate><enddate>20160405</enddate><creator>de Escobar, Cícero Coelho</creator><creator>Lansarin, Marla Azário</creator><creator>Zimnoch dos Santos, João Henrique</creator><general>Elsevier B.V</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>7X8</scope><scope>7QQ</scope><scope>7SR</scope><scope>7SU</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope></search><sort><creationdate>20160405</creationdate><title>Synthesis of molecularly imprinted photocatalysts containing low TiO2 loading: Evaluation for the degradation of pharmaceuticals</title><author>de Escobar, Cícero Coelho ; Lansarin, Marla Azário ; Zimnoch dos Santos, João Henrique</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-e337t-8e4ed5378068f480bc488a303d37df4e74bc6767b81a6ecb2a0882cc88019c123</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Adsorption</topic><topic>Catalysis</topic><topic>Degradation</topic><topic>Diclofenac</topic><topic>Holes</topic><topic>Molecular Imprinting</topic><topic>Pharmaceutical Preparations - chemistry</topic><topic>Pharmaceuticals</topic><topic>Photocatalysis</topic><topic>Photocatalysts</topic><topic>Photolysis</topic><topic>Silicon dioxide</topic><topic>Silicon Dioxide - chemistry</topic><topic>Titanium - chemistry</topic><topic>Titanium - radiation effects</topic><topic>Titanium dioxide</topic><topic>Ultraviolet Rays</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>de Escobar, Cícero Coelho</creatorcontrib><creatorcontrib>Lansarin, Marla Azário</creatorcontrib><creatorcontrib>Zimnoch dos Santos, João Henrique</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>MEDLINE - Academic</collection><collection>Ceramic Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Environmental Engineering 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><jtitle>Journal of hazardous materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>de Escobar, Cícero Coelho</au><au>Lansarin, Marla Azário</au><au>Zimnoch dos Santos, João Henrique</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Synthesis of molecularly imprinted photocatalysts containing low TiO2 loading: Evaluation for the degradation of pharmaceuticals</atitle><jtitle>Journal of hazardous materials</jtitle><addtitle>J Hazard Mater</addtitle><date>2016-04-05</date><risdate>2016</risdate><volume>306</volume><spage>359</spage><epage>366</epage><pages>359-366</pages><issn>0304-3894</issn><eissn>1873-3336</eissn><abstract>•Molecularly imprinted photocatalyst (MIP) containing low TiO2 loading were prepared by acid-catalyzed sol–gel process.•Seven pharmaceutical compounds were evaluated as a template.•Comparing to the P25, MIP has shown an increase of adsorption up to 752%.•Comparing to the P25, MIP has shown an increase of degradation up to 427%.•The presence of specific cavities on the silica domain could explain the better results for MIP.
A molecularly imprinted (MI) photocatalyst containing a low TiO2 loading (7.00–16.60mgL−1 of TiO2) was prepared via an acid-catalyzed sol–gel route using different classes of pharmaceutical compounds (i.e., Atorvastatin, Diclofenac, Ibuprofen, Tioconazole, Valsartan, Ketoconazole and Gentamicine) as the template. Herein, our main goal was to test the hypothesis that photocatalysts based on molecular imprinting may improve the degradation performance of pharmaceutical compounds compared to that of a commercial sample (Degussa P25) due to presence of specific cavities in the silica domain. To elucidate certain trends between the performance of photocatalysts and their structural and textural properties, as well the effect of the structure of the drugs on molecular imprinting, the data were analyzed in terms of pore diameter, pore volume, surface area, zeta potential and six-membered ring percentage of silica. In comparison to the commercial sample (P25), we have shown that adsorption and degradation were enhanced from 48 to 752% and from 5 to 427%, respectively. A comparison with the control system (non-imprinted) indicates that the increased performance of the MI systems was due to the presence of specific cavities on the silica domain, and the textural and structural aspects also support this conclusion. The MI photocatalyst was reusable for seven cycles of reuse in which approximately 60% of its photocatalytic efficiency was preserved for the system containing Diclofenac as the template.</abstract><cop>Netherlands</cop><pub>Elsevier B.V</pub><pmid>26800507</pmid><doi>10.1016/j.jhazmat.2015.11.035</doi><tpages>8</tpages></addata></record> |
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| subjects | Adsorption Catalysis Degradation Diclofenac Holes Molecular Imprinting Pharmaceutical Preparations - chemistry Pharmaceuticals Photocatalysis Photocatalysts Photolysis Silicon dioxide Silicon Dioxide - chemistry Titanium - chemistry Titanium - radiation effects Titanium dioxide Ultraviolet Rays |
| title | Synthesis of molecularly imprinted photocatalysts containing low TiO2 loading: Evaluation for the degradation of pharmaceuticals |
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