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ChemSusChem ; 9(19): 2759-2764, 2016 Oct 06.
Artigo em Inglês | MEDLINE | ID: mdl-27561212

RESUMO

The preparation of photocatalysts with high activities under visible-light illumination is challenging. We report the rational design and construction of a zirconium-doped anatase catalyst (S-Zr-TiO2 ) with Brønsted acidity and photoactivity as an efficient catalyst for the degradation of phenol under visible light. Electron microscopy images demonstrate that the zirconium sites are uniformly distributed on the sub-10 nm anatase crystals. UV-visible spectrometry indicates that the S-Zr-TiO2 is a visible-light-responsive catalyst with narrower band gap than conventional anatase. Pyridine-adsorption infrared and acetone-adsorption 13 C NMR spectra confirm the presence of Brønsted acidic sites on the S-Zr-TiO2 sample. Interestingly, the S-Zr-TiO2 catalyst exhibits high catalytic activity in the degradation of phenol under visible-light illumination, owing to a synergistic effect of the Brønsted acidity and photoactivity. Importantly, the S-Zr-TiO2 shows good recyclability.


Assuntos
Titânio/química , Zircônio/química , Ácidos/química , Espectroscopia de Ressonância Magnética Nuclear de Carbono-13 , Catálise , Processos Fotoquímicos , Espectrofotometria Ultravioleta
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