AgI/beta-Ag2MoO4 heterojunctions with enhanced visible-light-driven catalytic activity

作者：Zhang, Junlei; Ma, Zhen^*

来源：Journal of the Taiwan Institute of Chemical Engineers, 2017, 81: 225-231.

DOI：10.1016/j.jtice.2017.10.018

• AgI beta-Ag2MoO4
• Heterojunctions
• Photocatalysis
• Dyes
• Tetracycline hydrochloride

Visible-light-driven photocatalysis for removing industrial dyes and antibiotics in waste water has attracted much interest. New catalysts with enhanced photocatalytic performance have been actively sought. Herein, via a simple sequential precipitation method, AgI nanoparticles were anchored onto micron-sized beta-Ag2MoO4 particles to form AgI/beta-Ag2MoO4 p-n heterojunctions. These heterojunctions exhibited remarkably upgraded activities in the visible-light-driven photocatalytic degradation of rhodamine B, methyl orange, and tetracycline hydrochloride compared with pristine AgI and beta-Ag2MoO4. The enhanced photocatalytic activity can be mainly attributed to the tight heterojunction structure and well matched energy band that may facilitate the separation and transfer of photogenerated electron hole pairs. Photogenerated holes (h(+)) and superoxide radical anions (center dot O-2(-)) were found to be the main active species. A possible photocatalytic mechanism was proposed.

• 出版日期2017-12
• 单位复旦大学