Details

Autor(en) / Beteiligte

• Zhu, Jianying
• Fan, Hai
• Sun, Jianchao
• Ai, Shiyun

Titel

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

Ist Teil von

• Separation and purification technology, 2013-12, Vol.120, p.134-140

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2013

Quelle

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Beschreibungen/Notizen

• •α-Ag2WO4/Zn–Cr LDHs was prepared by an anion-exchange precipitation method.•α-Ag2WO4 particles were highly dispersed on the surface of Zn–Cr LDHs materials.•α-Ag2WO4/Zn–Cr LDHs shows much higher activity in the photodegradation of RhB.•The photocatalytic mechanism was proposed. In this paper, we report the obtention of α-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 α-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 α-Ag2WO4/Zn–Cr LDHs composite shows a higher visible-light-driven photocatalytic activity for degradation of organic pollutants than α-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.