Nanosized N-doped TiO2 and gold modified semiconductors - photocatalysts for combined UV-visible light destruction of oxalic acid in aqueous solution
The photooxidation of oxalic acid, catalyzed by nanosized TiO2, Au/TiO2, N-doped TiO2 and Au/N-doped TiO2 has been studied upon irradiation with UV, visible and combined UV-visible light. The average size of the synthesized by sol-gel method TiO2 and N-doped TiO2 nanoparticles is 20nm. The average s...
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| Veröffentlicht in: | Desalination 2010-09, Vol.260 (1-3), p.101-106 |
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| creator | ILIEV, V TOMOVA, D RAKOVSKY, S |
| description | The photooxidation of oxalic acid, catalyzed by nanosized TiO2, Au/TiO2, N-doped TiO2 and Au/N-doped TiO2 has been studied upon irradiation with UV, visible and combined UV-visible light. The average size of the synthesized by sol-gel method TiO2 and N-doped TiO2 nanoparticles is 20nm. The average size of the Au nanoparticles in Au/TiO2 and Au/N-TiO2 is 5nm. The XPS measurements confirm the replacing of oxygen atoms with nitrogen in the crystal lattice of TiO2. The rate constants of oxalic acid visible light photooxidation catalyzed by the studied samples follow the order: Au/N-doped TiO2>N-doped TiO2Au/TiO2>TiO2. The rate constants of oxalic acid photocatalytic degradation upon irradiation with visible light are much lower compared to the rate constants upon UV irradiation. In the case of combined UV-visible light photooxidation of oxalic acid catalyzed by N-doped TiO2 and Au/N-doped TiO2 the rate constants are equal to these registered upon UV light irradiation. This is due to the fact that the photon energy of the UV irradiation, EhI band gap energies of the N-doped TiO2 and Au/N-doped TiO2 semiconductors and they can be excited under UV illumination. |
| doi_str_mv | 10.1016/j.desal.2010.04.058 |
| format | Article |
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The average size of the synthesized by sol-gel method TiO2 and N-doped TiO2 nanoparticles is 20nm. The average size of the Au nanoparticles in Au/TiO2 and Au/N-TiO2 is 5nm. The XPS measurements confirm the replacing of oxygen atoms with nitrogen in the crystal lattice of TiO2. The rate constants of oxalic acid visible light photooxidation catalyzed by the studied samples follow the order: Au/N-doped TiO2>N-doped TiO2Au/TiO2>TiO2. The rate constants of oxalic acid photocatalytic degradation upon irradiation with visible light are much lower compared to the rate constants upon UV irradiation. In the case of combined UV-visible light photooxidation of oxalic acid catalyzed by N-doped TiO2 and Au/N-doped TiO2 the rate constants are equal to these registered upon UV light irradiation. This is due to the fact that the photon energy of the UV irradiation, EhI band gap energies of the N-doped TiO2 and Au/N-doped TiO2 semiconductors and they can be excited under UV illumination.</description><identifier>ISSN: 0011-9164</identifier><identifier>EISSN: 1873-4464</identifier><identifier>DOI: 10.1016/j.desal.2010.04.058</identifier><identifier>CODEN: DSLNAH</identifier><language>eng</language><publisher>Amsterdam: Elsevier</publisher><subject>Applied sciences ; Catalysis ; Catalytic reactions ; Chemical engineering ; Chemistry ; Exact sciences and technology ; General and physical chemistry ; Gold ; Irradiation ; Nanomaterials ; Nanostructure ; Oxalic acid ; Photooxidation ; Pollution ; Rate constants ; Reactors ; Semiconductors ; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry ; Titanium dioxide</subject><ispartof>Desalination, 2010-09, Vol.260 (1-3), p.101-106</ispartof><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c381t-f216311a875c22d752e5c84cfdb01719fb47f0b1728857c778c1cec764439e143</citedby><cites>FETCH-LOGICAL-c381t-f216311a875c22d752e5c84cfdb01719fb47f0b1728857c778c1cec764439e143</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,777,781,27905,27906</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=23014246$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>ILIEV, V</creatorcontrib><creatorcontrib>TOMOVA, D</creatorcontrib><creatorcontrib>RAKOVSKY, S</creatorcontrib><title>Nanosized N-doped TiO2 and gold modified semiconductors - photocatalysts for combined UV-visible light destruction of oxalic acid in aqueous solution</title><title>Desalination</title><description>The photooxidation of oxalic acid, catalyzed by nanosized TiO2, Au/TiO2, N-doped TiO2 and Au/N-doped TiO2 has been studied upon irradiation with UV, visible and combined UV-visible light. The average size of the synthesized by sol-gel method TiO2 and N-doped TiO2 nanoparticles is 20nm. The average size of the Au nanoparticles in Au/TiO2 and Au/N-TiO2 is 5nm. The XPS measurements confirm the replacing of oxygen atoms with nitrogen in the crystal lattice of TiO2. The rate constants of oxalic acid visible light photooxidation catalyzed by the studied samples follow the order: Au/N-doped TiO2>N-doped TiO2Au/TiO2>TiO2. The rate constants of oxalic acid photocatalytic degradation upon irradiation with visible light are much lower compared to the rate constants upon UV irradiation. In the case of combined UV-visible light photooxidation of oxalic acid catalyzed by N-doped TiO2 and Au/N-doped TiO2 the rate constants are equal to these registered upon UV light irradiation. This is due to the fact that the photon energy of the UV irradiation, EhI band gap energies of the N-doped TiO2 and Au/N-doped TiO2 semiconductors and they can be excited under UV illumination.</description><subject>Applied sciences</subject><subject>Catalysis</subject><subject>Catalytic reactions</subject><subject>Chemical engineering</subject><subject>Chemistry</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Gold</subject><subject>Irradiation</subject><subject>Nanomaterials</subject><subject>Nanostructure</subject><subject>Oxalic acid</subject><subject>Photooxidation</subject><subject>Pollution</subject><subject>Rate constants</subject><subject>Reactors</subject><subject>Semiconductors</subject><subject>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><subject>Titanium dioxide</subject><issn>0011-9164</issn><issn>1873-4464</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNp9kc1uFDEQhC0EEkvIE-TiC4LLLG7bY3uOKOJPipJLkqvladuJV57xMp5FhPfgfeMlEUdOpW591V1SEXIGbAsM1Mfd1ofq8paztmFyy3rzgmzAaNFJqeRLsmEMoBtAydfkTa27NvJBiA35c-nmUtPv4Oll58u-6XW64tTNnt6V7OlUfIqprWuYEpbZH3AtS6Ud3d-XtaBbXX6oa6WxLBTLNKa5wTe33c9U05gDzenufqUt37o0ayozLZGWXy4npA6Tp2mm7schlEOlteTDEXlLXkWXazh91hNy8-Xz9fm37uLq6_fzTxcdCgNrFzkoAeCM7pFzr3seejQSox8ZaBjiKHVkI2huTK9Ra4OAAbWSUgwBpDgh75_u7pfSItTVTqliyNnNxzxWK85Vr7hp5If_kqC1ZoMSvWqoeEJxKbUuIdr9kia3PFhg9liX3dm_ddljXZZJ2-pqrnfPD1xFl-PiZkz1n5ULBpJLJR4BmPqYxg</recordid><startdate>20100930</startdate><enddate>20100930</enddate><creator>ILIEV, V</creator><creator>TOMOVA, D</creator><creator>RAKOVSKY, S</creator><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SU</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope><scope>7QH</scope><scope>7ST</scope><scope>7UA</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope><scope>SOI</scope></search><sort><creationdate>20100930</creationdate><title>Nanosized N-doped TiO2 and gold modified semiconductors - photocatalysts for combined UV-visible light destruction of oxalic acid in aqueous solution</title><author>ILIEV, V ; TOMOVA, D ; RAKOVSKY, S</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c381t-f216311a875c22d752e5c84cfdb01719fb47f0b1728857c778c1cec764439e143</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Applied sciences</topic><topic>Catalysis</topic><topic>Catalytic reactions</topic><topic>Chemical engineering</topic><topic>Chemistry</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>Gold</topic><topic>Irradiation</topic><topic>Nanomaterials</topic><topic>Nanostructure</topic><topic>Oxalic acid</topic><topic>Photooxidation</topic><topic>Pollution</topic><topic>Rate constants</topic><topic>Reactors</topic><topic>Semiconductors</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>ILIEV, V</creatorcontrib><creatorcontrib>TOMOVA, D</creatorcontrib><creatorcontrib>RAKOVSKY, S</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Environmental Engineering Abstracts</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>Aqualine</collection><collection>Environment Abstracts</collection><collection>Water Resources Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Environment Abstracts</collection><jtitle>Desalination</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>ILIEV, V</au><au>TOMOVA, D</au><au>RAKOVSKY, S</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Nanosized N-doped TiO2 and gold modified semiconductors - photocatalysts for combined UV-visible light destruction of oxalic acid in aqueous solution</atitle><jtitle>Desalination</jtitle><date>2010-09-30</date><risdate>2010</risdate><volume>260</volume><issue>1-3</issue><spage>101</spage><epage>106</epage><pages>101-106</pages><issn>0011-9164</issn><eissn>1873-4464</eissn><coden>DSLNAH</coden><abstract>The photooxidation of oxalic acid, catalyzed by nanosized TiO2, Au/TiO2, N-doped TiO2 and Au/N-doped TiO2 has been studied upon irradiation with UV, visible and combined UV-visible light. The average size of the synthesized by sol-gel method TiO2 and N-doped TiO2 nanoparticles is 20nm. The average size of the Au nanoparticles in Au/TiO2 and Au/N-TiO2 is 5nm. The XPS measurements confirm the replacing of oxygen atoms with nitrogen in the crystal lattice of TiO2. The rate constants of oxalic acid visible light photooxidation catalyzed by the studied samples follow the order: Au/N-doped TiO2>N-doped TiO2Au/TiO2>TiO2. The rate constants of oxalic acid photocatalytic degradation upon irradiation with visible light are much lower compared to the rate constants upon UV irradiation. In the case of combined UV-visible light photooxidation of oxalic acid catalyzed by N-doped TiO2 and Au/N-doped TiO2 the rate constants are equal to these registered upon UV light irradiation. This is due to the fact that the photon energy of the UV irradiation, EhI band gap energies of the N-doped TiO2 and Au/N-doped TiO2 semiconductors and they can be excited under UV illumination.</abstract><cop>Amsterdam</cop><pub>Elsevier</pub><doi>10.1016/j.desal.2010.04.058</doi><tpages>6</tpages></addata></record> |
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| source | Elsevier ScienceDirect Journals |
| subjects | Applied sciences Catalysis Catalytic reactions Chemical engineering Chemistry Exact sciences and technology General and physical chemistry Gold Irradiation Nanomaterials Nanostructure Oxalic acid Photooxidation Pollution Rate constants Reactors Semiconductors Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry Titanium dioxide |
| title | Nanosized N-doped TiO2 and gold modified semiconductors - photocatalysts for combined UV-visible light destruction of oxalic acid in aqueous solution |
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