Anion-exchange precipitation synthesis of alpha-Ag2WO4/Zn-Cr layered double hydroxides composite with enhanced visible-light-driven photocatalytic activity

作者：Zhu, Jianying; Fan, Hai^*; Sun, Jianchao; Ai, Shiyun

来源：Separation and Purification Technology, 2013, 120: 134-140.

DOI：10.1016/j.seppur.2013.09.043

• alpha-Ag2WO4
• Layered double hydroxides
• Composite
• Photocatalysts
• Rhodamine B

In this paper, we report the obtention of alpha-Ag2WO4/Zn-Cr Layered Double Hydroxides (LDHs) composite via a facile anion-exchange precipitation reaction method by adding AgNO3 solution into WO42- anions intercalated Zn-Cr LDHs suspensions. X-ray diffraction, field emission scanning electronic microscope, X-ray photoelectron spectroscopy, and Fourier Transform Infrared Spectrum were used to characterize the products. It was found that alpha-Ag2WO4 crystals were dispersed on the surface of Zn-Cr LDHs materials on a large scale. The photocatalytic degradation studies on Rhodamine B indicate that alpha-Ag2WO4/Zn-Cr LDHs composite shows a higher visible-light-driven photocatalytic activity for degradation of organic pollutants than alpha-Ag2WO4 crystals and Zn-Cr LDHs. The possible photocatalytic mechanism is also discussed. Finally, a facile approach to fabricate novel types of visible-light-induced photocatalysts for environment treatment was discovered.

• 出版日期2013-12-13
• 单位山东农业大学