High-efficiently visible light-responsive photocatalysts: Ag3PO4 tetrahedral microcrystals with exposed {111} facets of high surface energy

作者：Zheng, Binjie^*; Wang, Xue; Liu, Chang; Tan, Kai; Xie, Zhaoxiong; Zheng, Lansun

来源：Journal of Materials Chemistry A, 2013, 1(40): 12635-12640.

DOI：10.1039/c3ta12946b

• GAS-SENSING PROPERTIES
• FACILE SYNTHESIS
• TITANIUM-DIOXIDE
• HYDROGEN-PRODUCTION
• SUB-MICROCRYSTALS
• WATER
• SEMICONDUCTOR
• NANOPARTICLES
• IRRADIATION
• PERCENTAGE

In this article, single-crystalline tetrahedral Ag3PO4 microcrystals with exposed {111} facets was successfully synthesized via a facile wet chemical method. The tetrahedral Ag3PO4 with exposed {111} facets showed the highest photocatalytic activity in visible light irradiation among the {111}, {110} and {100} facets. By DFT calculations, it is demonstrated that the surface energy of the {111} facets is higher than that of the {110} and {100} facets. It was found that the largest band gap of the Ag3PO4 {111} surface is likely to suppress the recombination of electron-hole pairs by exploring the electronic structures of the different surfaces of Ag3PO4. Meanwhile, the dispersion between the valence bands and conduction bands of the {111} surface is beneficial for the separation of photogenerated electrons and holes on the {111} surface, which further improves the photocatalytic activity of the {111} surface.

• 出版日期2013
• 单位厦门大学