Electrosorption-promoted photodegradation of opaque wastewater on a novel TiO(2)/carbon aerogel electrode

Environmental Science & Technology
Meifen WuDongming Li

Abstract

A novel electrosorption-photocatalysis synergistic electrode of TiO(2)/carbon aerogel (TiO(2)/CA) is prepared. The thermal stability and dispersion of the anatase TiO(2) particles are well facilitated by the porous and discontinuous microstructure of CA. The degradation experiments show that the TiO(2)/CA material is not only a good photocatalyst but also an excellent electrosorptive electrode. The TiO(2)/CA is easily molded to an agglomerate electrode. The opaque wastewater with dyestuff is degraded effectively by the electrosorption-promoted photocatalytic process on this electrode. For the simulated methylene blue (MB) wastewater (150 mg L(-1)), the rate constant of MB degradation in the electro-assisted photocatalytic process with the conventional ITO-supported TiO(2) (TiO(2)/ITO) is 0.55 x 10(-3) min(-1) and that the electrosorption-promoted photocatalysis with TiO(2)/CA is 10.27 x 10(-3) min(-1), which is 18 times the former. In the electrosorption-promoted photocatalytic process with TiO(2)/CA, the energy consumption removing per unit TOC is only 15% of that in the electro-assisted photocatalysis with TiO(2)/ITO, because the electrosorption is a nonfaradic process irrelative to any electron transfer and requires very low...Continue Reading

References

Jul 30, 2002·Environmental Science & Technology·Christopher J GabelichI H Mel Suffet
Mar 27, 2003·Chemosphere·Sheng WenPing'an Peng
Jul 1, 2004·Environmental Science & Technology·Maria Valnice B ZanoniMarc A Anderson
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Oct 17, 2007·Environmental Science & Technology·Zhonghai ZhangLitong Jin
Dec 14, 2007·Environmental Science & Technology·Jing ShangJia Li
Oct 24, 2009·Environmental Science & Technology·Fabiana Maria Monteiro PaschoalMarc A Anderson

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Citations

Apr 15, 2014·Environmental Science and Pollution Research International·Baharak Ayoubi-FeizEsmaeel Alipour
Apr 30, 2016·Environmental Science & Technology·Chang LiuHan-Qing Yu
Sep 12, 2016·Environmental Science and Pollution Research International·Liang LiangMinghua Zhou
Jan 25, 2011·Analytical and Bioanalytical Chemistry·Liyuan ZhangYukui Zhang

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