Efficient photocatalytic activity with carbon-doped SiO2 nanoparticles
KAUST DepartmentWater Desalination and Reuse Research Center (WDRC)
Permanent link to this recordhttp://hdl.handle.net/10754/600251
MetadataShow full item record
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.
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.
SponsorsThis work is supported by Hong Kong GRC grants 604710 and 605411.
PublisherRoyal Society of Chemistry (RSC)
- Rose-like monodisperse bismuth subcarbonate hierarchical hollow microspheres: one-pot template-free fabrication and excellent visible light photocatalytic activity and photochemical stability for NO removal in indoor air.
- Authors: Dong F, Lee SC, Wu Z, Huang Y, Fu M, Ho WK, Zou S, Wang B
- Issue date: 2011 Nov 15
- High photocatalytic activity of hierarchical SiO(2)@C-doped TiO(2) hollow spheres in UV and visible light towards degradation of rhodamine B.
- Authors: Zhang Y, Chen J, Hua L, Li S, Zhang X, Sheng W, Cao S
- Issue date: 2017 Oct 15
- N-doped SiO2/TiO2 mesoporous nanoparticles with enhanced photocatalytic activity under visible-light irradiation.
- Authors: Hou YD, Wang XC, Wu L, Chen XF, Ding ZX, Wang XX, Fu XZ
- Issue date: 2008 Jun
- Room-temperature synthesis of Zn(0.80)Cd(0.20)S solid solution with a high visible-light photocatalytic activity for hydrogen evolution.
- Authors: Wang DH, Wang L, Xu AW
- Issue date: 2012 Mar 21
- Fabrication of photocatalyst based on Eu3+-doped ZnS-SiO2 and sodium alginate core shell nanocomposite.
- Authors: Agorku ES, Mittal H, Mamba BB, Pandey AC, Mishra AK
- Issue date: 2014 Sep