Photocatalytic Degradation and Bleaching of Au/N-TiO2 Composite Nanofibers
Using electrospinning and deposition techniques,Au/N-TiO2 photocatalysts with excellent visible-light response had been successfully synthesized by prepared by deposited Au NPs on the surface of N-doped TiO2 nanofibers,and the catalysts were characterized.The results show that the degradation rate of rhodamine B and methylene blue for Au/N-TiO2 nano fibers is higher than that of original TiO2 and N-TiO2 nanofibers.After the dark reaction,the degradation rate of methylene blue catalyzed by Au/N-TiO2 can reach 98％,and rhodamine B reaches 96％within 10 minutes in the light reaction.Au/N-TiO2 is used to produce hydrogen peroxide for synchronous bleaching of cotton fabrics firstly.The hydrogen peroxide production reaches 288 p.mol/L and whiteness of cotton fabrics could be improved by using Au/N-TiO2.The mechanism analysis shows that N doped and the plasma resonance effect(SPR)of Au NPs can widen the visible light response range of the composite nanofiber catalyst,thus enhancing the photocatalytic activity.
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