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Enhanced photocatalytic activity of TiO?-C hybrid aerogels for methylene blue degradation.

ABSTRACT: Carbon-based TiO? composites have many advantages as photocatalysts. However, they suffer from low light efficiency due to the low contrast of TiO? with carbon. We synthesized a novel type of anatase-type TiO?-C hybrid aerogel by a one-pot sol-gel method, which shows a photocatalytic activity for methylene degradation up to 4.23 times that of P25, a commercial photocatalyst from Degussa Inc. The hybrid aerogels are prepared from TiCl? and resorcinol-furfural, and have a tunable macropore size from 167 to 996 nm. They are formed of submicrometer particles that consist of interwoven anatase and carbon nanoparticles. The anatase nanoparticles have a size of 8-9 nm and a tunable oxygen vacancy from 7.2 to 18.0%. The extremely high activity is ascribed to the large light absorption caused by macropore scattering and oxygen vacancies in the anatase. These findings may open up a new avenue and stimulate further research to improve photocatalytic performance.

SUBMITTER: Shao X

PROVIDER: S-EPMC3804859 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature

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Enhanced photocatalytic activity of TiO₂-C hybrid aerogels for methylene blue degradation.

Shao Xia X Lu Wencong W Zhang Rui R Pan Feng F

Scientific reports 20131022

Carbon-based TiO₂ composites have many advantages as photocatalysts. However, they suffer from low light efficiency due to the low contrast of TiO₂ with carbon. We synthesized a novel type of anatase-type TiO₂-C hybrid aerogel by a one-pot sol-gel method, which shows a photocatalytic activity for methylene degradation up to 4.23 times that of P25, a commercial photocatalyst from Degussa Inc. The hybrid aerogels are prepared from TiCl₄ and resorcinol-furfural, and have a tunable macropore size fr ...[more]

PMID: 24145581

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