银负载TiO_2纳米线/石墨烯的制备及光催化应用

Ag modification of TiO_2 nanowire-graphene for photocatalysis applications

采用二步水热法和光照还原法制备了银负载TiO2纳米线/石墨烯(GR/TiO2NW/Ag)复合材料,并对其进行了表征,结果表明:Ag纳米颗粒修饰的TiO2NW分布于石墨烯表面,TiO2NW为锐钛矿晶型,光生电子和空穴复合效率降低。并研究了GR/TiO2NW/Ag复合材料在紫外光下降解双酚A废水的光催化性能,实验结果表明,GR/TiO2NW/Ag对双酚A的降解效果明显优于TiO2。40min内,GR/TiO2NW/Ag在紫外光照下对双酚A降解率达到100%。

Ag modification of TiO2nanowire-graphene（GR/TiO2NW/Ag）was prepared using hydrothermal and photocatalytic reduction method.Characterization revealed that Ag modified anatase TiO2 distributed on GR and the electron-hole recombination rate decreased compared with pure TiO2.The photocatalytic activity of the as-prepared nanocomposites for bisphenol A degradation were investigated under UV light irradiation.The results showed that the nanocomposites had photocatalytic activity significantly higher than pure TiO2.After irradiation for 40 min,the degradation rate of GR/TiO2NW/Ag for bisphenol A reached 100% under UV light.