u-TiO2复合材料的酸性制备及其光催化性能研究

u-TiO2 composites with different Au nanoparticle (Au NP) loadings have been successfully synthesized under an acid condition. The optical characterizations indicate that both absorption performance and carrier separation rate monotonically improved with the increasing of the Au NP loading in the composite due to the plasmon-exciton coupling. However, instead of monotonically changing, the highest photocatalytic activity had been achieved when the loading was 1wt.%, and the degradation rate exposuring to visible light about 5h of such composite is 82.1% higher than that of RhB.The following decreasing of the degradation rate with the increasing of the loading coulde be due to the the aggregation of Au NPs and thus formed electron traps.