Convenient fabrication of BiOBr ultrathin nanosheets with rich oxygen vacancies for photocatalytic selective oxidation of secondary amines
Photocatalytic oxidation has been widely employed in organic synthesis, by virtue of the green, mild and simple reaction conditions as well as high selectivity. Introducing oxygen vacancies (OVs) with proper concentrations into the photocatalysts has been proven as an effective strategy to boost the...
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| Veröffentlicht in: | Nano research 2019-07, Vol.12 (7), p.1625-1630 |
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| container_title | Nano research |
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| creator | Tong, Xuanjue Cao, Xing Han, Tong Cheong, Weng-Chon Lin, Rui Chen, Zheng Wang, Dingsheng Chen, Chen Peng, Qing Li, Yadong |
| description | Photocatalytic oxidation has been widely employed in organic synthesis, by virtue of the green, mild and simple reaction conditions as well as high selectivity. Introducing oxygen vacancies (OVs) with proper concentrations into the photocatalysts has been proven as an effective strategy to boost the catalytic performances. However, the currently used treatment method under high temperature at reducing atmosphere inevitably introduces a large number of OVs at the interior of the catalyst and serving as the recombination centers of carriers. To address this issue, here we develop a facile solvothermal process to prepare ultrathin BiOBr nanosheets with rich surface OVs. This method effectively decreases the bulk of the material and the ratio of interior OVs, rendering most of the OVs exposed on the surfaces which act as exposed catalytic sites and enhance the separation of carriers, therefore significantly elevates the photocatalytic performances. For the photo-oxidation reaction of secondary amines, under the conditions of visible light, ambient temperature and atmosphere, the BiOBr nanosheets featuring rich surface OVs deliver a doubled conversion compared to those with low OV concentrations, and a high selectivity of 99%, a high stability as the performance shows no reduction after 5 times of circular reaction. |
| doi_str_mv | 10.1007/s12274-018-2404-x |
| format | Article |
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Introducing oxygen vacancies (OVs) with proper concentrations into the photocatalysts has been proven as an effective strategy to boost the catalytic performances. However, the currently used treatment method under high temperature at reducing atmosphere inevitably introduces a large number of OVs at the interior of the catalyst and serving as the recombination centers of carriers. To address this issue, here we develop a facile solvothermal process to prepare ultrathin BiOBr nanosheets with rich surface OVs. This method effectively decreases the bulk of the material and the ratio of interior OVs, rendering most of the OVs exposed on the surfaces which act as exposed catalytic sites and enhance the separation of carriers, therefore significantly elevates the photocatalytic performances. For the photo-oxidation reaction of secondary amines, under the conditions of visible light, ambient temperature and atmosphere, the BiOBr nanosheets featuring rich surface OVs deliver a doubled conversion compared to those with low OV concentrations, and a high selectivity of 99%, a high stability as the performance shows no reduction after 5 times of circular reaction.</description><identifier>ISSN: 1998-0124</identifier><identifier>EISSN: 1998-0000</identifier><identifier>DOI: 10.1007/s12274-018-2404-x</identifier><language>eng</language><publisher>Beijing: Tsinghua University Press</publisher><subject>Active sites ; Ambient temperature ; Amines ; Atmosphere ; Atomic/Molecular Structure and Spectra ; Biomedicine ; Biotechnology ; Catalysis ; Catalysts ; Chemistry and Materials Science ; Condensed Matter Physics ; Fabrication ; High temperature ; Materials Science ; Nanosheets ; Nanotechnology ; Oxidation ; Oxygen ; Photocatalysis ; Photooxidation ; Recombination ; Research Article ; Selectivity ; Vacancies</subject><ispartof>Nano research, 2019-07, Vol.12 (7), p.1625-1630</ispartof><rights>Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019</rights><rights>Nano Research is a copyright of Springer, (2019). All Rights Reserved.</rights><rights>Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c344t-26954a3c4d5e4c909bdcbd5c161453c3556a7bf7a98d0c12e090197237c3d5903</citedby><cites>FETCH-LOGICAL-c344t-26954a3c4d5e4c909bdcbd5c161453c3556a7bf7a98d0c12e090197237c3d5903</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s12274-018-2404-x$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s12274-018-2404-x$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,41488,42557,51319</link.rule.ids></links><search><creatorcontrib>Tong, Xuanjue</creatorcontrib><creatorcontrib>Cao, Xing</creatorcontrib><creatorcontrib>Han, Tong</creatorcontrib><creatorcontrib>Cheong, Weng-Chon</creatorcontrib><creatorcontrib>Lin, Rui</creatorcontrib><creatorcontrib>Chen, Zheng</creatorcontrib><creatorcontrib>Wang, Dingsheng</creatorcontrib><creatorcontrib>Chen, Chen</creatorcontrib><creatorcontrib>Peng, Qing</creatorcontrib><creatorcontrib>Li, Yadong</creatorcontrib><title>Convenient fabrication of BiOBr ultrathin nanosheets with rich oxygen vacancies for photocatalytic selective oxidation of secondary amines</title><title>Nano research</title><addtitle>Nano Res</addtitle><description>Photocatalytic oxidation has been widely employed in organic synthesis, by virtue of the green, mild and simple reaction conditions as well as high selectivity. Introducing oxygen vacancies (OVs) with proper concentrations into the photocatalysts has been proven as an effective strategy to boost the catalytic performances. However, the currently used treatment method under high temperature at reducing atmosphere inevitably introduces a large number of OVs at the interior of the catalyst and serving as the recombination centers of carriers. To address this issue, here we develop a facile solvothermal process to prepare ultrathin BiOBr nanosheets with rich surface OVs. This method effectively decreases the bulk of the material and the ratio of interior OVs, rendering most of the OVs exposed on the surfaces which act as exposed catalytic sites and enhance the separation of carriers, therefore significantly elevates the photocatalytic performances. For the photo-oxidation reaction of secondary amines, under the conditions of visible light, ambient temperature and atmosphere, the BiOBr nanosheets featuring rich surface OVs deliver a doubled conversion compared to those with low OV concentrations, and a high selectivity of 99%, a high stability as the performance shows no reduction after 5 times of circular reaction.</description><subject>Active sites</subject><subject>Ambient temperature</subject><subject>Amines</subject><subject>Atmosphere</subject><subject>Atomic/Molecular Structure and Spectra</subject><subject>Biomedicine</subject><subject>Biotechnology</subject><subject>Catalysis</subject><subject>Catalysts</subject><subject>Chemistry and Materials Science</subject><subject>Condensed Matter Physics</subject><subject>Fabrication</subject><subject>High temperature</subject><subject>Materials Science</subject><subject>Nanosheets</subject><subject>Nanotechnology</subject><subject>Oxidation</subject><subject>Oxygen</subject><subject>Photocatalysis</subject><subject>Photooxidation</subject><subject>Recombination</subject><subject>Research Article</subject><subject>Selectivity</subject><subject>Vacancies</subject><issn>1998-0124</issn><issn>1998-0000</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp9kctOAjEUhidGExF9AHdNXI_2OjNdCvGWkLjRdVM6Z5gSaLEtCK_gU1uCl5V2c7r4_u_k5C-KS4KvCcb1TSSU1rzEpCkpx7zcHhUDImVT4vyOv_-E8tPiLMY5xhUlvBkUH2PvNuAsuIQ6PQ3W6GS9Q75DI_s8Cmi9SEGn3jrktPOxB0gRvdvUo8z2yG93M3Boo412xkJEnQ9o1fvks0gvdskaFGEBJtkNZNq2P_4IxrtWhx3SS-sgnhcnnV5EuPiaw-L1_u5l_FhOnh-exreT0jDOU0krKbhmhrcCuJFYTlszbYUhFeGCGSZEpetpV2vZtNgQClhiImvKasNaITEbFlcH7yr4tzXEpOZ-HVxeqajATLAaV_xfihIqm5qQJlPkQJngYwzQqVWwy3yTIljti1GHYlQuRu2LUducoYdMzKybQfg1_x36BJ04kxs</recordid><startdate>20190701</startdate><enddate>20190701</enddate><creator>Tong, Xuanjue</creator><creator>Cao, 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fabrication of BiOBr ultrathin nanosheets with rich oxygen vacancies for photocatalytic selective oxidation of secondary amines</title><author>Tong, Xuanjue ; Cao, Xing ; Han, Tong ; Cheong, Weng-Chon ; Lin, Rui ; Chen, Zheng ; Wang, Dingsheng ; Chen, Chen ; Peng, Qing ; Li, Yadong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c344t-26954a3c4d5e4c909bdcbd5c161453c3556a7bf7a98d0c12e090197237c3d5903</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Active sites</topic><topic>Ambient temperature</topic><topic>Amines</topic><topic>Atmosphere</topic><topic>Atomic/Molecular Structure and Spectra</topic><topic>Biomedicine</topic><topic>Biotechnology</topic><topic>Catalysis</topic><topic>Catalysts</topic><topic>Chemistry and Materials Science</topic><topic>Condensed Matter Physics</topic><topic>Fabrication</topic><topic>High temperature</topic><topic>Materials 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vacancies for photocatalytic selective oxidation of secondary amines</atitle><jtitle>Nano research</jtitle><stitle>Nano Res</stitle><date>2019-07-01</date><risdate>2019</risdate><volume>12</volume><issue>7</issue><spage>1625</spage><epage>1630</epage><pages>1625-1630</pages><issn>1998-0124</issn><eissn>1998-0000</eissn><abstract>Photocatalytic oxidation has been widely employed in organic synthesis, by virtue of the green, mild and simple reaction conditions as well as high selectivity. Introducing oxygen vacancies (OVs) with proper concentrations into the photocatalysts has been proven as an effective strategy to boost the catalytic performances. However, the currently used treatment method under high temperature at reducing atmosphere inevitably introduces a large number of OVs at the interior of the catalyst and serving as the recombination centers of carriers. To address this issue, here we develop a facile solvothermal process to prepare ultrathin BiOBr nanosheets with rich surface OVs. This method effectively decreases the bulk of the material and the ratio of interior OVs, rendering most of the OVs exposed on the surfaces which act as exposed catalytic sites and enhance the separation of carriers, therefore significantly elevates the photocatalytic performances. For the photo-oxidation reaction of secondary amines, under the conditions of visible light, ambient temperature and atmosphere, the BiOBr nanosheets featuring rich surface OVs deliver a doubled conversion compared to those with low OV concentrations, and a high selectivity of 99%, a high stability as the performance shows no reduction after 5 times of circular reaction.</abstract><cop>Beijing</cop><pub>Tsinghua University Press</pub><doi>10.1007/s12274-018-2404-x</doi><tpages>6</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1998-0124 |
| ispartof | Nano research, 2019-07, Vol.12 (7), p.1625-1630 |
| issn | 1998-0124 1998-0000 |
| language | eng |
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| source | SpringerNature Journals |
| subjects | Active sites Ambient temperature Amines Atmosphere Atomic/Molecular Structure and Spectra Biomedicine Biotechnology Catalysis Catalysts Chemistry and Materials Science Condensed Matter Physics Fabrication High temperature Materials Science Nanosheets Nanotechnology Oxidation Oxygen Photocatalysis Photooxidation Recombination Research Article Selectivity Vacancies |
| title | Convenient fabrication of BiOBr ultrathin nanosheets with rich oxygen vacancies for photocatalytic selective oxidation of secondary amines |
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