(Hollow Au-Ag nanoparticles)-TiO2 composites for improved photocatalytic activity prepared from block copolymer-stabilized bimetallic nanoparticles

作者：Li, Na; Zhang, Xiaoyu; Yuan, Shulong; Zhang, Xiaokai; Yuan, Yuzhen; Li, Xue^*

来源：Physical Chemistry Chemical Physics, 2015, 17(18): 12023-12030.

DOI：10.1039/c4cp06093h

• GALVANIC REPLACEMENT REACTION
• CORE-SHELL NANOPARTICLES
• TITANIUM-DIOXIDE
• SILVER NANOPARTICLES
• TIO2 FILMS
• PHOTOELECTROCHEMICAL PROPERTIES
• METAL NANOSTRUCTURES
• CATALYTIC-ACTIVITY
• GOLD
• FABRICATION

Composite nanoparticles (NPs) containing a TiO2 outer shell and an inner core of hollow AuAg NPs (H-AuAg-NPs) were prepared using hollow AuAg NPs with block copolymer shells as templates, and their photocatalytic activities were investigated by the decomposition of methylene blue dye under UV irradiation. It was found that the H-AuAg-NP-TiO2 composite NPs showed higher photocatalytic activity than AuAg alloy-TiO2 composite NPs, Ag/TiO2 NPs and TiO2 NPs. In addition, the photocatalytic activity first increases with increasing the TiO2 content from 2.5% to 5.0% and then decreases with a further increase in TiO2 content from 10.0% to 15.0%.

• 出版日期2015
• 单位山东师范大学; 济南大学; 山东理工大学