Flower-like Au/Ag/TiO_2 nanocomposites with enhanced photocatalytic efficiency under visible light i

• 作 者: Fei Han Xin Mao Qing-Hua Xu
• 机 构: Department of Chemistry,National University of Singapore,National University of Singapore Nanoscienc
• 出 处: Science China(Chemistry)
• 发表日期: 2017年04期
• 关键词: photocatalytic irradiation visible hydrolysis facile coated flower acidic Unifor

Uniform flower-like TiO_2 coated Au nanostars and core-shell Au@Ag natiostars with different amounts of Ag coating were prepared through a facile method by hydrolysis of TiF_4 under an acidic environment.The photocatalytic capability of these flower-like nanocomposites under visible light irradiation was found to be enhanced by up to 4.7-fold compared to commercial P25 TiO_2 nanoparticles.The enhanced photocatalytic activity was ascribed to improved light absorption and hot electron injection from the photo-excited Au@Ag core to the TiO_2 shell.

Uniform flower-like TiO 2 coated Au nanostars and core-shell Au @ Ag natiostars with different amounts of Ag coating were prepared through a facile method by hydrolysis of TiF_4 under an acidic environment. The photocatalytic capability of these flower-like nanocomposites under visible light irradiation was found to be enhanced by up to 4.7-fold compared to commercial P25 TiO 2 nanoparticles. The enhanced photocatalytic activity was ascribed to improved light absorption and hot electron injection from the photo-excited Au @ Ag core to the TiO 2 shell.