Unveiling the role of peroxo groups in Nb2O5 photocatalytic efficiency under visible light
•Peroxo-Nb2O5 photocatalysts were prepared by a one-pot hydrothermal oxygen peroxide method.•The materials showed visible-light photoactivity for the oxidation of a phenolic model compound (caffeic acid).•Peroxo groups acted as charge mediators in the photooxidative process. Peroxo-Nb2O5 photocataly...
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| Veröffentlicht in: | Materials letters 2020-08, Vol.273, p.127915, Article 127915 |
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| container_title | Materials letters |
| container_volume | 273 |
| creator | Silva, Roberta R.M. Oliveira, Jéssica A. Ruotolo, Luís A.M. Faria, Ana L.A. Ribeiro, Cauê Nogueira, Francisco G.E. |
| description | •Peroxo-Nb2O5 photocatalysts were prepared by a one-pot hydrothermal oxygen peroxide method.•The materials showed visible-light photoactivity for the oxidation of a phenolic model compound (caffeic acid).•Peroxo groups acted as charge mediators in the photooxidative process.
Peroxo-Nb2O5 photocatalyst with visible-light activity was fabricated via a one-pot hydrothermal oxygen peroxide method for the first time. The one-pot synthesis employing different H2O2 concentrations promoted simultaneous crystallization and surface groups formation that impacted the photocatalytic efficiency. It was demonstrated that the presence of peroxo groups acted as charge mediators in a photooxidative process since the samples did not present any band gap shift to visible. The catalyst reutilization indicated that the photocatalytic effect is not temporary, reinforcing the chemical role of peroxo groups as charge mediators. |
| doi_str_mv | 10.1016/j.matlet.2020.127915 |
| format | Article |
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Peroxo-Nb2O5 photocatalyst with visible-light activity was fabricated via a one-pot hydrothermal oxygen peroxide method for the first time. The one-pot synthesis employing different H2O2 concentrations promoted simultaneous crystallization and surface groups formation that impacted the photocatalytic efficiency. It was demonstrated that the presence of peroxo groups acted as charge mediators in a photooxidative process since the samples did not present any band gap shift to visible. The catalyst reutilization indicated that the photocatalytic effect is not temporary, reinforcing the chemical role of peroxo groups as charge mediators.</description><identifier>ISSN: 0167-577X</identifier><identifier>EISSN: 1873-4979</identifier><identifier>DOI: 10.1016/j.matlet.2020.127915</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Crystallization ; Heterogeneous photocatalysis ; Hydrogen peroxide ; Materials science ; Niobium oxides ; Niobium pentoxide ; Phenolic compounds photooxidation ; Photocatalysis ; Visible light</subject><ispartof>Materials letters, 2020-08, Vol.273, p.127915, Article 127915</ispartof><rights>2020 Elsevier B.V.</rights><rights>Copyright Elsevier BV Aug 15, 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c334t-e09287a36b06888db0d3e591510dd877294adbb171842acb0832403c8c7c90143</citedby><cites>FETCH-LOGICAL-c334t-e09287a36b06888db0d3e591510dd877294adbb171842acb0832403c8c7c90143</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.matlet.2020.127915$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3536,27903,27904,45974</link.rule.ids></links><search><creatorcontrib>Silva, Roberta R.M.</creatorcontrib><creatorcontrib>Oliveira, Jéssica A.</creatorcontrib><creatorcontrib>Ruotolo, Luís A.M.</creatorcontrib><creatorcontrib>Faria, Ana L.A.</creatorcontrib><creatorcontrib>Ribeiro, Cauê</creatorcontrib><creatorcontrib>Nogueira, Francisco G.E.</creatorcontrib><title>Unveiling the role of peroxo groups in Nb2O5 photocatalytic efficiency under visible light</title><title>Materials letters</title><description>•Peroxo-Nb2O5 photocatalysts were prepared by a one-pot hydrothermal oxygen peroxide method.•The materials showed visible-light photoactivity for the oxidation of a phenolic model compound (caffeic acid).•Peroxo groups acted as charge mediators in the photooxidative process.
Peroxo-Nb2O5 photocatalyst with visible-light activity was fabricated via a one-pot hydrothermal oxygen peroxide method for the first time. The one-pot synthesis employing different H2O2 concentrations promoted simultaneous crystallization and surface groups formation that impacted the photocatalytic efficiency. It was demonstrated that the presence of peroxo groups acted as charge mediators in a photooxidative process since the samples did not present any band gap shift to visible. The catalyst reutilization indicated that the photocatalytic effect is not temporary, reinforcing the chemical role of peroxo groups as charge mediators.</description><subject>Crystallization</subject><subject>Heterogeneous photocatalysis</subject><subject>Hydrogen peroxide</subject><subject>Materials science</subject><subject>Niobium oxides</subject><subject>Niobium pentoxide</subject><subject>Phenolic compounds photooxidation</subject><subject>Photocatalysis</subject><subject>Visible light</subject><issn>0167-577X</issn><issn>1873-4979</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp9kEtLxDAUhYMoOD7-gYuA6455tUk3ggy-YHA2Doib0Ka3Mymdpibp4Px7O9a1qwuHc87lfAjdUDKnhGZ3zXxXxBbinBE2SkzmND1BM6okT0Qu81M0G20ySaX8OEcXITSEEJETMUOf624PtrXdBsctYO9awK7GPXj37fDGu6EP2Hb4rWSrFPdbF50pYtEeojUY6toaC5054KGrwOO9DbYcG1q72cYrdFYXbYDrv3uJ1k-P74uXZLl6fl08LBPDuYgJkJwpWfCsJJlSqipJxSEdF1BSVUpKlouiKksqqRKsMCVRnAnCjTLS5IQKfolup97eu68BQtSNG3w3vtRMCJrKnLFsdInJZbwLwUOte293hT9oSvSRom70RFEfKeqJ4hi7n2IwLthb8Dr8LobKejBRV87-X_ADOuF8XQ</recordid><startdate>20200815</startdate><enddate>20200815</enddate><creator>Silva, Roberta R.M.</creator><creator>Oliveira, Jéssica A.</creator><creator>Ruotolo, Luís A.M.</creator><creator>Faria, Ana L.A.</creator><creator>Ribeiro, Cauê</creator><creator>Nogueira, Francisco G.E.</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20200815</creationdate><title>Unveiling the role of peroxo groups in Nb2O5 photocatalytic efficiency under visible light</title><author>Silva, Roberta R.M. ; Oliveira, Jéssica A. ; Ruotolo, Luís A.M. ; Faria, Ana L.A. ; Ribeiro, Cauê ; Nogueira, Francisco G.E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c334t-e09287a36b06888db0d3e591510dd877294adbb171842acb0832403c8c7c90143</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Crystallization</topic><topic>Heterogeneous photocatalysis</topic><topic>Hydrogen peroxide</topic><topic>Materials science</topic><topic>Niobium oxides</topic><topic>Niobium pentoxide</topic><topic>Phenolic compounds photooxidation</topic><topic>Photocatalysis</topic><topic>Visible light</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Silva, Roberta R.M.</creatorcontrib><creatorcontrib>Oliveira, Jéssica A.</creatorcontrib><creatorcontrib>Ruotolo, Luís A.M.</creatorcontrib><creatorcontrib>Faria, Ana L.A.</creatorcontrib><creatorcontrib>Ribeiro, Cauê</creatorcontrib><creatorcontrib>Nogueira, Francisco G.E.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Materials letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Silva, Roberta R.M.</au><au>Oliveira, Jéssica A.</au><au>Ruotolo, Luís A.M.</au><au>Faria, Ana L.A.</au><au>Ribeiro, Cauê</au><au>Nogueira, Francisco G.E.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Unveiling the role of peroxo groups in Nb2O5 photocatalytic efficiency under visible light</atitle><jtitle>Materials letters</jtitle><date>2020-08-15</date><risdate>2020</risdate><volume>273</volume><spage>127915</spage><pages>127915-</pages><artnum>127915</artnum><issn>0167-577X</issn><eissn>1873-4979</eissn><abstract>•Peroxo-Nb2O5 photocatalysts were prepared by a one-pot hydrothermal oxygen peroxide method.•The materials showed visible-light photoactivity for the oxidation of a phenolic model compound (caffeic acid).•Peroxo groups acted as charge mediators in the photooxidative process.
Peroxo-Nb2O5 photocatalyst with visible-light activity was fabricated via a one-pot hydrothermal oxygen peroxide method for the first time. The one-pot synthesis employing different H2O2 concentrations promoted simultaneous crystallization and surface groups formation that impacted the photocatalytic efficiency. It was demonstrated that the presence of peroxo groups acted as charge mediators in a photooxidative process since the samples did not present any band gap shift to visible. The catalyst reutilization indicated that the photocatalytic effect is not temporary, reinforcing the chemical role of peroxo groups as charge mediators.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.matlet.2020.127915</doi></addata></record> |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Crystallization Heterogeneous photocatalysis Hydrogen peroxide Materials science Niobium oxides Niobium pentoxide Phenolic compounds photooxidation Photocatalysis Visible light |
| title | Unveiling the role of peroxo groups in Nb2O5 photocatalytic efficiency under visible light |
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