Flower-like Au/Ag/TiO2 nanocomposites with enhanced photocatalytic efficiency under visible light irradiation

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2017,（4）
• 页码范围: 521-527
• 页数: 7页
• 语种: 英文
• DOI: 10.1007/s11426-016-9027-6

摘要

Uniform flower-like TiO2 coated Au nanostars and core-shell Au@Ag nanostars with different amounts of Ag coating were prepared through a facile method by hydrolysis of TiF4 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 TiO2 nanoparticles.The enhanced photocatalytic activity was ascribed to improved light absorption and hot electron injection from the photo-excited Au@Ag core to the TiO2 shell.