Insights into the effect of inner polarization and multiple Ag-O units on high-efficient Ag-based photocatalyst

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• 作者：Mengmeng Li ; Ying Dai ; ^{daiy60@sina.com} ; Xiangchao Ma ; Tao Jing ; Baibiao Huang
• 关键词：Built-in electric field ; Multiple Ag-O units ; Carriers transfer ; Ag-based photocatalyst
• 刊名：Applied Catalysis B: Environmental
• 出版年：2017
• 出版时间：15 May 2017
• 年：2017
• 卷：205
• 期：Complete
• 页码：211-218
• 全文大小：3178 K
• 卷排序：205

文摘

Compared with Ag2O and Ag3PO4, the advantageous transfer of carriers in Ag6Si2O7 is found responsible for its high photocatalytic activity. The multiple Ag-O units in Ag6Si2O7 result in the separated distribution of holes and electrons. Built-in electric field promotes the transfer of electrons and holes in different regions then reduces the recombination of carriers. The most stable (100) surface of Ag6Si2O7 with holes trapped at surface layers is also beneficial to the photo-oxidation reaction.