Au/TiO_2纳米片异质结薄膜的制备及其光催化性能研究

Preparation of Heterostructured Au/TiO_2 Nanosheet Film and Its Photocatalytic Property

采用微波辅助化学还原法制备Au/TiO_2纳米片异质结薄膜(Au/TiO_2NSF)光催化剂,通过XRD、SEM、UVVis、PL和光电流响应对其进行表征,并考察了其在模拟太阳光下降解水相中有机染料亚甲基蓝(MB)和清除气相中氮氧化物(NO_x)的性能。结果表明,Au/TiO_2NSF光催化剂对光的吸收利用好、光生电子-空穴对复合几率小,其光催化降解MB和清除NO_x的活性比TiO_2NSF高,其中1.0Au/TiO_2NSF的效果最好。

We prepared a heterostructured Au/TiO 2 nanosheet film（Au/TiO 2NSF） photocatalyst by a microwave assisted chemical reduction method,and characterized its structure by XRD,SEM,UV Vis,PL,and photocurrent response.Moreover,we investigated the performance of the Au/TiO 2NSF photocatalyst in degrading methylene blue（MB） in aqueous media under simulated sunlight and the performance of the Au/TiO 2NSF photocatalyst in removing nitrogen oxide（NO x ） in gas phase.The results show that the Au/TiO 2NSF photocatalyst can effectively absorb and make use of light,and has a small recombination rate of photoelectron hole pair.The Au/TiO 2NSF photocatalyst has higher photocatalytic activities of degrading MB and removing NO x than those of TiO 2NSF,and 1.0 Au/TiO 2NSF has the best performance.