A novel sulfur-assisted annealing method of g-C3N4 nanosheet compensates for the loss of light absorption with further promoted charge transfer for photocatalytic production of H2 and H2O2

[Display omitted] •A novel co-annealing method was developed for the preparation of sulfur doped g-C3N4.•The prepared SS-CN exhibits enhanced optical absorption, charge separation and surface charge transfer.•DFT calculations revealed the mechanism by which S-doping regulates band structure and char...

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Veröffentlicht in:Applied catalysis. B, Environmental Environmental, 2021-02, Vol.281, p.119539, Article 119539
Hauptverfasser: Feng, Chengyang, Tang, Lin, Deng, Yaocheng, Wang, Jiajia, Liu, Yani, Ouyang, Xilian, Yang, Haoran, Yu, Jiangfang, Wang, Jingjing
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container_start_page 119539
container_title Applied catalysis. B, Environmental
container_volume 281
creator Feng, Chengyang
Tang, Lin
Deng, Yaocheng
Wang, Jiajia
Liu, Yani
Ouyang, Xilian
Yang, Haoran
Yu, Jiangfang
Wang, Jingjing
description [Display omitted] •A novel co-annealing method was developed for the preparation of sulfur doped g-C3N4.•The prepared SS-CN exhibits enhanced optical absorption, charge separation and surface charge transfer.•DFT calculations revealed the mechanism by which S-doping regulates band structure and charge distribution.•The SS-CN photocatalyst has highly enhanced capacity of H2 evolution and H2O2 production. Exfoliating g-C3N4 into 2D nanosheet to minimize the stacking layer for the improvement of charge transfer and separation is considered to be the effective measure to enhance its photocatalytic performance. However, no matter what method is used, the exfoliated g-C3N4 nanosheet shows decreased optical absorption compared to the pristine bulk-like one. In this work, a simple one-step sulfur doping method is proposed on the basis of exfoliated g-C3N4 nanosheet, which can directly regulate the band structure of g-C3N4 and enhance its optical absorption ability. The proposed sulfur doping method redshift the light absorption edge of g-C3N4 nanosheet to the level of pristine bulk-like g-C3N4, and even induce the generation of a new n→π* absorption band. In addition, the introduced sulfur doping site can form a local electron accumulation point, so that to further improve the charge separation efficiency and surface charge transfer ability of g-C3N4 nanosheets.
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Exfoliating g-C3N4 into 2D nanosheet to minimize the stacking layer for the improvement of charge transfer and separation is considered to be the effective measure to enhance its photocatalytic performance. However, no matter what method is used, the exfoliated g-C3N4 nanosheet shows decreased optical absorption compared to the pristine bulk-like one. In this work, a simple one-step sulfur doping method is proposed on the basis of exfoliated g-C3N4 nanosheet, which can directly regulate the band structure of g-C3N4 and enhance its optical absorption ability. The proposed sulfur doping method redshift the light absorption edge of g-C3N4 nanosheet to the level of pristine bulk-like g-C3N4, and even induce the generation of a new n→π* absorption band. In addition, the introduced sulfur doping site can form a local electron accumulation point, so that to further improve the charge separation efficiency and surface charge transfer ability of g-C3N4 nanosheets.</description><identifier>ISSN: 0926-3373</identifier><identifier>EISSN: 1873-3883</identifier><identifier>DOI: 10.1016/j.apcatb.2020.119539</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Absorption ; Absorption spectra ; Band structure regulation ; Carbon nitride ; Charge efficiency ; Charge separation ; Charge transfer ; Doping ; Electromagnetic absorption ; Exfoliation ; g-C3N4 ; Hydrogen peroxide ; Nanosheets ; Photocatalysis ; Red shift ; Separation ; Sulfur ; sulfur doping ; Surface charge ; Surface charge transfer</subject><ispartof>Applied catalysis. 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B, Environmental</title><description>[Display omitted] •A novel co-annealing method was developed for the preparation of sulfur doped g-C3N4.•The prepared SS-CN exhibits enhanced optical absorption, charge separation and surface charge transfer.•DFT calculations revealed the mechanism by which S-doping regulates band structure and charge distribution.•The SS-CN photocatalyst has highly enhanced capacity of H2 evolution and H2O2 production. Exfoliating g-C3N4 into 2D nanosheet to minimize the stacking layer for the improvement of charge transfer and separation is considered to be the effective measure to enhance its photocatalytic performance. However, no matter what method is used, the exfoliated g-C3N4 nanosheet shows decreased optical absorption compared to the pristine bulk-like one. In this work, a simple one-step sulfur doping method is proposed on the basis of exfoliated g-C3N4 nanosheet, which can directly regulate the band structure of g-C3N4 and enhance its optical absorption ability. The proposed sulfur doping method redshift the light absorption edge of g-C3N4 nanosheet to the level of pristine bulk-like g-C3N4, and even induce the generation of a new n→π* absorption band. In addition, the introduced sulfur doping site can form a local electron accumulation point, so that to further improve the charge separation efficiency and surface charge transfer ability of g-C3N4 nanosheets.</description><subject>Absorption</subject><subject>Absorption spectra</subject><subject>Band structure regulation</subject><subject>Carbon nitride</subject><subject>Charge efficiency</subject><subject>Charge separation</subject><subject>Charge transfer</subject><subject>Doping</subject><subject>Electromagnetic absorption</subject><subject>Exfoliation</subject><subject>g-C3N4</subject><subject>Hydrogen peroxide</subject><subject>Nanosheets</subject><subject>Photocatalysis</subject><subject>Red shift</subject><subject>Separation</subject><subject>Sulfur</subject><subject>sulfur doping</subject><subject>Surface charge</subject><subject>Surface charge transfer</subject><issn>0926-3373</issn><issn>1873-3883</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNp9kc-O1SAUxonRxOvoG7ggcd0rBVrajcnkRmdMJs5G14Q_h1tueqECHTPv5sNJrWtXJ8B3ft85fAi9b8mxJW3_8XJUi1FFHymh9aodOza-QId2EKxhw8BeogMZad8wJthr9CbnCyGEMjoc0O9bHOITzDivs1tTo3L2uYDFKgRQsw9nfIUyRYujw-fmxL5xHFSIeQIo2MTrAiGrAhm7mHCZAM8x5008-_NUsNI5pqX4GPAvXyZcPaoo4SXFa9x8zKTSGXBJKmRXHzbMMsUS60Jqfi7ebFq7mr-Myr2ndTZbyyN9i145NWd496_eoB9fPn8_3TcPj3dfT7cPjaF8LI3gnA6aayHqUWurKRHMETaKkVplaecGo3WvNRdKGNFTYvqua1tHTKe4GdgN-rBz6yQ_V8hFXuKaQrWUlAshSC_6TcV3lUn1CxI4uSR_VelZtkRuOcmL3HOSW05yz6m2fdrboG7w5CHJbDwEA9YnMEXa6P8P-AOBeqCq</recordid><startdate>202102</startdate><enddate>202102</enddate><creator>Feng, Chengyang</creator><creator>Tang, Lin</creator><creator>Deng, Yaocheng</creator><creator>Wang, Jiajia</creator><creator>Liu, Yani</creator><creator>Ouyang, Xilian</creator><creator>Yang, Haoran</creator><creator>Yu, Jiangfang</creator><creator>Wang, Jingjing</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7ST</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope><scope>L7M</scope><scope>SOI</scope><orcidid>https://orcid.org/0000-0001-6996-7955</orcidid><orcidid>https://orcid.org/0000-0003-4965-3443</orcidid></search><sort><creationdate>202102</creationdate><title>A novel sulfur-assisted annealing method of g-C3N4 nanosheet compensates for the loss of light absorption with further promoted charge transfer for photocatalytic production of H2 and H2O2</title><author>Feng, Chengyang ; Tang, Lin ; Deng, Yaocheng ; Wang, Jiajia ; Liu, Yani ; Ouyang, Xilian ; Yang, Haoran ; Yu, Jiangfang ; Wang, Jingjing</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c249t-74428b4b77249bbdb2073f039792dad25f8cbb6bb47a7c7620c65511f0c5a4c83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Absorption</topic><topic>Absorption spectra</topic><topic>Band structure regulation</topic><topic>Carbon nitride</topic><topic>Charge efficiency</topic><topic>Charge separation</topic><topic>Charge transfer</topic><topic>Doping</topic><topic>Electromagnetic absorption</topic><topic>Exfoliation</topic><topic>g-C3N4</topic><topic>Hydrogen peroxide</topic><topic>Nanosheets</topic><topic>Photocatalysis</topic><topic>Red shift</topic><topic>Separation</topic><topic>Sulfur</topic><topic>sulfur doping</topic><topic>Surface charge</topic><topic>Surface charge transfer</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Feng, Chengyang</creatorcontrib><creatorcontrib>Tang, Lin</creatorcontrib><creatorcontrib>Deng, Yaocheng</creatorcontrib><creatorcontrib>Wang, Jiajia</creatorcontrib><creatorcontrib>Liu, Yani</creatorcontrib><creatorcontrib>Ouyang, Xilian</creatorcontrib><creatorcontrib>Yang, Haoran</creatorcontrib><creatorcontrib>Yu, Jiangfang</creatorcontrib><creatorcontrib>Wang, Jingjing</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Environment Abstracts</collection><collection>Solid State and Superconductivity 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><collection>Advanced Technologies Database with Aerospace</collection><collection>Environment Abstracts</collection><jtitle>Applied catalysis. 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B, Environmental</jtitle><date>2021-02</date><risdate>2021</risdate><volume>281</volume><spage>119539</spage><pages>119539-</pages><artnum>119539</artnum><issn>0926-3373</issn><eissn>1873-3883</eissn><abstract>[Display omitted] •A novel co-annealing method was developed for the preparation of sulfur doped g-C3N4.•The prepared SS-CN exhibits enhanced optical absorption, charge separation and surface charge transfer.•DFT calculations revealed the mechanism by which S-doping regulates band structure and charge distribution.•The SS-CN photocatalyst has highly enhanced capacity of H2 evolution and H2O2 production. Exfoliating g-C3N4 into 2D nanosheet to minimize the stacking layer for the improvement of charge transfer and separation is considered to be the effective measure to enhance its photocatalytic performance. However, no matter what method is used, the exfoliated g-C3N4 nanosheet shows decreased optical absorption compared to the pristine bulk-like one. 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subjects Absorption
Absorption spectra
Band structure regulation
Carbon nitride
Charge efficiency
Charge separation
Charge transfer
Doping
Electromagnetic absorption
Exfoliation
g-C3N4
Hydrogen peroxide
Nanosheets
Photocatalysis
Red shift
Separation
Sulfur
sulfur doping
Surface charge
Surface charge transfer
title A novel sulfur-assisted annealing method of g-C3N4 nanosheet compensates for the loss of light absorption with further promoted charge transfer for photocatalytic production of H2 and H2O2
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