Improving charge separation, photocurrent and photocatalytic activities of Dy-doped TiO2 by surface modification with salicylic acid
Salicylic acid-modified Dy-TiO 2 (Dy-TiO 2 /SA), novel visible light-sensitive material was synthesized via a sol–gel followed by impregnation method. Salicylic acid (SA) molecules are mixed with the TiO 2 and Dy-TiO 2 samples in hexane which promotes their direct adsorption. SA-modified TiO 2 parti...
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| Veröffentlicht in: | Journal of materials science. Materials in electronics 2020-12, Vol.31 (23), p.20919-20931 |
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| creator | Ouled Amor, Chaima Elghniji, Kais Elaloui, Elimame |
| description | Salicylic acid-modified Dy-TiO
2
(Dy-TiO
2
/SA), novel visible light-sensitive material was synthesized via a sol–gel followed by impregnation method. Salicylic acid (SA) molecules are mixed with the TiO
2
and Dy-TiO
2
samples in hexane which promotes their direct adsorption. SA-modified TiO
2
particles (TiO
2
/SA and Dy-TiO
2
/SA) were finally obtained after drying at 120 °C. FTIR spectroscopy shows the formation of a fairly stable complex between Ti
4+
surface ions and salicylic acid. In Dy-TiO
2
/SA complex, a ligand-to-metal charge transfer (LMCT) is active giving light absorption in the visible region (500–600 nm) indicating a bandgap of ~ 2.24 eV, lower than unmodified TiO
2
samples. Electron paramagnetic resonance (EPR) and photoluminescence analyses demonstrate that LMCT process stabilizes the defect states within TiO
2
bandgap, suppressing the electron–hole recombination process. The charge separation of SA-modified TiO
2
complexes was evaluated through the photocurrent and the photocatalytic performances of Dy-TiO
2
/SA under visible light irradiation. |
| doi_str_mv | 10.1007/s10854-020-04606-x |
| format | Article |
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2
(Dy-TiO
2
/SA), novel visible light-sensitive material was synthesized via a sol–gel followed by impregnation method. Salicylic acid (SA) molecules are mixed with the TiO
2
and Dy-TiO
2
samples in hexane which promotes their direct adsorption. SA-modified TiO
2
particles (TiO
2
/SA and Dy-TiO
2
/SA) were finally obtained after drying at 120 °C. FTIR spectroscopy shows the formation of a fairly stable complex between Ti
4+
surface ions and salicylic acid. In Dy-TiO
2
/SA complex, a ligand-to-metal charge transfer (LMCT) is active giving light absorption in the visible region (500–600 nm) indicating a bandgap of ~ 2.24 eV, lower than unmodified TiO
2
samples. Electron paramagnetic resonance (EPR) and photoluminescence analyses demonstrate that LMCT process stabilizes the defect states within TiO
2
bandgap, suppressing the electron–hole recombination process. The charge separation of SA-modified TiO
2
complexes was evaluated through the photocurrent and the photocatalytic performances of Dy-TiO
2
/SA under visible light irradiation.</description><identifier>ISSN: 0957-4522</identifier><identifier>EISSN: 1573-482X</identifier><identifier>DOI: 10.1007/s10854-020-04606-x</identifier><language>eng</language><publisher>New York: Springer US</publisher><subject>Acids ; Characterization and Evaluation of Materials ; Charge transfer ; Chemistry and Materials Science ; Coordination compounds ; Dysprosium ; Electromagnetic absorption ; Electron paramagnetic resonance ; Energy gap ; Hexanes ; Light irradiation ; Materials Science ; Optical and Electronic Materials ; Photocatalysis ; Photoelectric effect ; Photoelectric emission ; Photoluminescence ; Salicylic acid ; Separation ; Sol-gel processes ; Titanium dioxide</subject><ispartof>Journal of materials science. Materials in electronics, 2020-12, Vol.31 (23), p.20919-20931</ispartof><rights>Springer Science+Business Media, LLC, part of Springer Nature 2020</rights><rights>Springer Science+Business Media, LLC, part of Springer Nature 2020.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c356t-d1b5bb9db5bd7a4d67a2f2eae9e4e46b4bddcc73616f70a5ad84f97685d4bb313</citedby><cites>FETCH-LOGICAL-c356t-d1b5bb9db5bd7a4d67a2f2eae9e4e46b4bddcc73616f70a5ad84f97685d4bb313</cites><orcidid>0000-0001-7367-3095</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10854-020-04606-x$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10854-020-04606-x$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Ouled Amor, Chaima</creatorcontrib><creatorcontrib>Elghniji, Kais</creatorcontrib><creatorcontrib>Elaloui, Elimame</creatorcontrib><title>Improving charge separation, photocurrent and photocatalytic activities of Dy-doped TiO2 by surface modification with salicylic acid</title><title>Journal of materials science. Materials in electronics</title><addtitle>J Mater Sci: Mater Electron</addtitle><description>Salicylic acid-modified Dy-TiO
2
(Dy-TiO
2
/SA), novel visible light-sensitive material was synthesized via a sol–gel followed by impregnation method. Salicylic acid (SA) molecules are mixed with the TiO
2
and Dy-TiO
2
samples in hexane which promotes their direct adsorption. SA-modified TiO
2
particles (TiO
2
/SA and Dy-TiO
2
/SA) were finally obtained after drying at 120 °C. FTIR spectroscopy shows the formation of a fairly stable complex between Ti
4+
surface ions and salicylic acid. In Dy-TiO
2
/SA complex, a ligand-to-metal charge transfer (LMCT) is active giving light absorption in the visible region (500–600 nm) indicating a bandgap of ~ 2.24 eV, lower than unmodified TiO
2
samples. Electron paramagnetic resonance (EPR) and photoluminescence analyses demonstrate that LMCT process stabilizes the defect states within TiO
2
bandgap, suppressing the electron–hole recombination process. The charge separation of SA-modified TiO
2
complexes was evaluated through the photocurrent and the photocatalytic performances of Dy-TiO
2
/SA under visible light irradiation.</description><subject>Acids</subject><subject>Characterization and Evaluation of Materials</subject><subject>Charge transfer</subject><subject>Chemistry and Materials Science</subject><subject>Coordination compounds</subject><subject>Dysprosium</subject><subject>Electromagnetic absorption</subject><subject>Electron paramagnetic resonance</subject><subject>Energy gap</subject><subject>Hexanes</subject><subject>Light irradiation</subject><subject>Materials Science</subject><subject>Optical and Electronic Materials</subject><subject>Photocatalysis</subject><subject>Photoelectric effect</subject><subject>Photoelectric emission</subject><subject>Photoluminescence</subject><subject>Salicylic acid</subject><subject>Separation</subject><subject>Sol-gel processes</subject><subject>Titanium dioxide</subject><issn>0957-4522</issn><issn>1573-482X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNp9kE9LwzAYh4MoOKdfwFPAq9E0SZPuKPPfYLDLBG8hTdIto2tqkul694Nb14E3L3kh_H7Py_sAcJ3huwxjcR8zXOQMYYIRZhxztD8BoywXFLGCvJ-CEZ7kArGckHNwEeMGY8wZLUbge7Ztg_90zQrqtQorC6NtVVDJ-eYWtmufvN6FYJsEVWOOHyqpuktOQ6WT-3TJ2Qh9BR87ZHxrDVy6BYFlB-MuVEpbuPXGVU4foPDLpTWMqna6qw8IZy7BWaXqaK-Ocwzenp-W01c0X7zMpg9zpGnOEzJZmZflxPSvEYoZLhSpiFV2YpllvGSlMVoLyjNeCaxyZQpWTQQvcsPKkmZ0DG4Gbn_yx87GJDd-F5p-pSRMUEoELWifIkNKBx9jsJVsg9uq0MkMy1_bcrAte9vyYFvu-xIdSrEPNysb_tD_tH4ADbiHEA</recordid><startdate>20201201</startdate><enddate>20201201</enddate><creator>Ouled Amor, Chaima</creator><creator>Elghniji, Kais</creator><creator>Elaloui, Elimame</creator><general>Springer US</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>F28</scope><scope>FR3</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>L7M</scope><scope>P5Z</scope><scope>P62</scope><scope>PDBOC</scope><scope>PHGZM</scope><scope>PHGZT</scope><scope>PKEHL</scope><scope>PQEST</scope><scope>PQGLB</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>S0W</scope><orcidid>https://orcid.org/0000-0001-7367-3095</orcidid></search><sort><creationdate>20201201</creationdate><title>Improving charge separation, photocurrent and photocatalytic activities of Dy-doped TiO2 by surface modification with salicylic acid</title><author>Ouled Amor, Chaima ; Elghniji, Kais ; Elaloui, Elimame</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c356t-d1b5bb9db5bd7a4d67a2f2eae9e4e46b4bddcc73616f70a5ad84f97685d4bb313</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Acids</topic><topic>Characterization and Evaluation of Materials</topic><topic>Charge transfer</topic><topic>Chemistry and Materials Science</topic><topic>Coordination compounds</topic><topic>Dysprosium</topic><topic>Electromagnetic absorption</topic><topic>Electron paramagnetic resonance</topic><topic>Energy gap</topic><topic>Hexanes</topic><topic>Light irradiation</topic><topic>Materials Science</topic><topic>Optical and Electronic Materials</topic><topic>Photocatalysis</topic><topic>Photoelectric effect</topic><topic>Photoelectric emission</topic><topic>Photoluminescence</topic><topic>Salicylic acid</topic><topic>Separation</topic><topic>Sol-gel processes</topic><topic>Titanium dioxide</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ouled Amor, Chaima</creatorcontrib><creatorcontrib>Elghniji, Kais</creatorcontrib><creatorcontrib>Elaloui, Elimame</creatorcontrib><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Materials Science Collection</collection><collection>ProQuest Central (New)</collection><collection>ProQuest One Academic (New)</collection><collection>ProQuest One Academic Middle East (New)</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Applied & Life Sciences</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>DELNET Engineering & Technology Collection</collection><jtitle>Journal of materials science. Materials in electronics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ouled Amor, Chaima</au><au>Elghniji, Kais</au><au>Elaloui, Elimame</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Improving charge separation, photocurrent and photocatalytic activities of Dy-doped TiO2 by surface modification with salicylic acid</atitle><jtitle>Journal of materials science. Materials in electronics</jtitle><stitle>J Mater Sci: Mater Electron</stitle><date>2020-12-01</date><risdate>2020</risdate><volume>31</volume><issue>23</issue><spage>20919</spage><epage>20931</epage><pages>20919-20931</pages><issn>0957-4522</issn><eissn>1573-482X</eissn><abstract>Salicylic acid-modified Dy-TiO
2
(Dy-TiO
2
/SA), novel visible light-sensitive material was synthesized via a sol–gel followed by impregnation method. Salicylic acid (SA) molecules are mixed with the TiO
2
and Dy-TiO
2
samples in hexane which promotes their direct adsorption. SA-modified TiO
2
particles (TiO
2
/SA and Dy-TiO
2
/SA) were finally obtained after drying at 120 °C. FTIR spectroscopy shows the formation of a fairly stable complex between Ti
4+
surface ions and salicylic acid. In Dy-TiO
2
/SA complex, a ligand-to-metal charge transfer (LMCT) is active giving light absorption in the visible region (500–600 nm) indicating a bandgap of ~ 2.24 eV, lower than unmodified TiO
2
samples. Electron paramagnetic resonance (EPR) and photoluminescence analyses demonstrate that LMCT process stabilizes the defect states within TiO
2
bandgap, suppressing the electron–hole recombination process. The charge separation of SA-modified TiO
2
complexes was evaluated through the photocurrent and the photocatalytic performances of Dy-TiO
2
/SA under visible light irradiation.</abstract><cop>New York</cop><pub>Springer US</pub><doi>10.1007/s10854-020-04606-x</doi><tpages>13</tpages><orcidid>https://orcid.org/0000-0001-7367-3095</orcidid></addata></record> |
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| ispartof | Journal of materials science. Materials in electronics, 2020-12, Vol.31 (23), p.20919-20931 |
| issn | 0957-4522 1573-482X |
| language | eng |
| recordid | cdi_proquest_journals_2473327383 |
| source | Springer Nature - Complete Springer Journals |
| subjects | Acids Characterization and Evaluation of Materials Charge transfer Chemistry and Materials Science Coordination compounds Dysprosium Electromagnetic absorption Electron paramagnetic resonance Energy gap Hexanes Light irradiation Materials Science Optical and Electronic Materials Photocatalysis Photoelectric effect Photoelectric emission Photoluminescence Salicylic acid Separation Sol-gel processes Titanium dioxide |
| title | Improving charge separation, photocurrent and photocatalytic activities of Dy-doped TiO2 by surface modification with salicylic acid |
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