Citation: GE Ming, TAN Mian-Mian, CUI Guang-Hua. Synthesis of Ag₃PO₄/BiVO₄ Composite Photocatalyst and Its Photocatalytic Degradation of Dyes under Visible Light Irradiation[J]. Acta Physico-Chimica Sinica, ;2014, 30(11): 2107-2112. doi: 10.3866/PKU.WHXB201409041 shu

Synthesis of Ag₃PO₄/BiVO₄ Composite Photocatalyst and Its Photocatalytic Degradation of Dyes under Visible Light Irradiation

1.
College of Chemical Engineering, Hebei United University, Tangshan 063009, Hebei Province, P. R. China

Received Date: 23 June 2014
Available Online: 4 September 2014
Fund Project: 河北省自然科学基金(B2014209182) (B2014209182)河北省教育厅青年基金(QN2014045)资助项目 (QN2014045)

Silver phosphate/bismuth vanadate (Ag₃PO₄/BiVO₄) composite photocatalysts were successfully synthesized by coupling a reflux method with an in situ precipitation route. X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), UV-Vis diffuse reflectance spectroscopy (DRS), and photoluminescence (PL) spectroscopy were used to characterize the as-prepared products. The XRD and FESEM results showed that Ag₃PO₄/BiVO₄ composite photocatalysts were successfully obtained. An energy-efficient light emitting diode lamp was used as the visible light source, and the photocatalytic performances of the as-synthesized products were evaluated for dye degradation in a low-cost photocatalytic system. The Ag₃PO₄/BiVO₄ composite with a Ag₃PO₄:BiVO₄ molar ratio of 1:3 exhibited much higher photocatalytic activity than pure Ag₃PO₄ catalyst, resulting in decreased use of Ag₃PO₄. The Ag₃PO₄/BiVO₄ composite photocatalyst showed the best photoactivity in neutral solution and had a higher photodegradation rate for cationic dyes than anionic dyes. The superoxide radicals (O₂^-·) and holes (h+) were considered to be the main active species in the Ag₃PO₄/BiVO₄ system. The photocatalytic activity of the Ag₃PO₄/BiVO₄ composite photocatalyst decreased to different degrees after three cycles because of the production of metallic silver.
- Silver phosphate,
- Bismuth vanadate,
- Visible light,
- Photocatalysis,
- Dye,
- Mechanism
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沈阳化工大学材料科学与工程学院沈阳 110142

Synthesis of Ag3PO4/BiVO4 Composite Photocatalyst and Its Photocatalytic Degradation of Dyes under Visible Light Irradiation

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通讯作者: 陈斌, bchen63@163.com

Synthesis of Ag₃PO₄/BiVO₄ Composite Photocatalyst and Its Photocatalytic Degradation of Dyes under Visible Light Irradiation