Efficient photocatalytic activity with carbon-doped SiO2 nanoparticles

Handle URI:
http://hdl.handle.net/10754/600251
Title:
Efficient photocatalytic activity with carbon-doped SiO2 nanoparticles
Authors:
Zhang, Dongen; Wu, Jinbo; Zhou, Bingpu; Hong, Yaying; Li, Shunbo; Wen, Weijia
Abstract:
Photocatalysis provides a 'green' approach to completely eliminate various kinds of contaminants that are fatal for current environmental and energy issues. Semiconductors are one of the most frequently used photocatalysts as they can absorb light over a wide spectral range. However, it is also well known that naked SiO2 is not an efficient photocatalyst due to its relatively large band gap, which could only absorb shortwave ultraviolet light. In this report, nanoscale particles of carbon-doped silicon dioxide (C-doped SiO2) for use in photocatalysis were successfully prepared by a facile one-pot thermal process using tetraethylorthosilicate (TEOS) as the source of both silicon and carbon. These particles were subsequently characterized by thermogravimetric analysis, X-ray diffraction, standard and high resolution transmission electron microscopy and X-ray photoelectron spectroscopy. The C-doped SiO2 displayed outstanding photocatalytic properties, as evidenced by its catalysis of Rhodamine B degradation under near-UV irradiation. We propose that carbon doping of the SiO2 lattice creates new energy states between the bottom of the conduction band and the top of the valence band, which narrows the band gap of the material. As a result, the C-doped SiO2 nanoparticles exhibit excellent photocatalytic activities in a neutral environment. The novel synthesis reported herein for this material is both energy efficient and environmentally friendly and as such shows promise as a technique for low-cost, readily scalable industrial production. © 2013 The Royal Society of Chemistry.
Citation:
Zhang D, Wu J, Zhou B, Hong Y, Li S, et al. (2013) Efficient photocatalytic activity with carbon-doped SiO2 nanoparticles. Nanoscale 5: 6167. Available: http://dx.doi.org/10.1039/c3nr01314f.
Publisher:
Royal Society of Chemistry (RSC)
Journal:
Nanoscale
Issue Date:
2013
DOI:
10.1039/c3nr01314f
PubMed ID:
23727825
Type:
Article
ISSN:
2040-3364; 2040-3372
Sponsors:
This work is supported by Hong Kong GRC grants 604710 and 605411.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorZhang, Dongenen
dc.contributor.authorWu, Jinboen
dc.contributor.authorZhou, Bingpuen
dc.contributor.authorHong, Yayingen
dc.contributor.authorLi, Shunboen
dc.contributor.authorWen, Weijiaen
dc.date.accessioned2016-02-28T08:00:01Zen
dc.date.available2016-02-28T08:00:01Zen
dc.date.issued2013en
dc.identifier.citationZhang D, Wu J, Zhou B, Hong Y, Li S, et al. (2013) Efficient photocatalytic activity with carbon-doped SiO2 nanoparticles. Nanoscale 5: 6167. Available: http://dx.doi.org/10.1039/c3nr01314f.en
dc.identifier.issn2040-3364en
dc.identifier.issn2040-3372en
dc.identifier.pmid23727825en
dc.identifier.doi10.1039/c3nr01314fen
dc.identifier.urihttp://hdl.handle.net/10754/600251en
dc.description.abstractPhotocatalysis provides a 'green' approach to completely eliminate various kinds of contaminants that are fatal for current environmental and energy issues. Semiconductors are one of the most frequently used photocatalysts as they can absorb light over a wide spectral range. However, it is also well known that naked SiO2 is not an efficient photocatalyst due to its relatively large band gap, which could only absorb shortwave ultraviolet light. In this report, nanoscale particles of carbon-doped silicon dioxide (C-doped SiO2) for use in photocatalysis were successfully prepared by a facile one-pot thermal process using tetraethylorthosilicate (TEOS) as the source of both silicon and carbon. These particles were subsequently characterized by thermogravimetric analysis, X-ray diffraction, standard and high resolution transmission electron microscopy and X-ray photoelectron spectroscopy. The C-doped SiO2 displayed outstanding photocatalytic properties, as evidenced by its catalysis of Rhodamine B degradation under near-UV irradiation. We propose that carbon doping of the SiO2 lattice creates new energy states between the bottom of the conduction band and the top of the valence band, which narrows the band gap of the material. As a result, the C-doped SiO2 nanoparticles exhibit excellent photocatalytic activities in a neutral environment. The novel synthesis reported herein for this material is both energy efficient and environmentally friendly and as such shows promise as a technique for low-cost, readily scalable industrial production. © 2013 The Royal Society of Chemistry.en
dc.description.sponsorshipThis work is supported by Hong Kong GRC grants 604710 and 605411.en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.titleEfficient photocatalytic activity with carbon-doped SiO2 nanoparticlesen
dc.typeArticleen
dc.identifier.journalNanoscaleen
dc.contributor.institutionNano Science and Technology Program, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kongen
dc.contributor.institutionDepartment of Chemical Engineering, Huaihai Institute of Technology, No.59 Cangwu Road, Lianyungang 222005, Chinaen
kaust.authorZhang, Dongenen
kaust.authorWu, Jinboen
kaust.authorHong, Yayingen
kaust.authorLi, Shunboen
kaust.authorWen, Weijiaen
kaust.grant.fundedcenterKAUST-HKUST Micro/Nanofluidic Joint Laboratoryen
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