New porous titanium–niobium oxide for photocatalytic degradation of Bromocresol Green (cas 62625-32-5) dye in aqueous solution

Add time:07/19/2019    Source:sciencedirect.com

In this study, high surface area semiconductors, non porous and porous titanium–niobium oxides derived from KTiNbO5 were synthesized, characterized and developed for their utility as photocatalysts for decontamination with sunlight. These materials were then used in the photocatalytic degradation of Bromocresol Green (cas 62625-32-5) dye (BG) in aqueous solution using UV light and their catalytic activities were evaluated at various pHs. For all catalysts, the photocatalytic degradation of BG was most efficient in acidic solutions. Results show that the new porous oxides have large porous and high surface areas and high catalytic activity. A topotactic dehydration treatment greatly improves catalyst performance at various pHs. Stability and long term activity of porous materials (topo and non-topo) in photocatalysis reactions was also tested. These results suggest that the new materials can be used to efficiently purify contaminated water.

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