Citation: WANG Zhao-Hua, CAI Qiong-Yao, YE Ting-Ming, GUO Ying-Na, GENG Zhi, YANG Xia, YU Hong-Bin. BiPO₄/Ag₃PO₄ p-n Heterojunction with Enhanced Photocatalytic Activity under Simulated Sunlight Irradiation[J]. Chinese Journal of Inorganic Chemistry, ;2017, 33(7): 1196-1204. doi: 10.11862/CJIC.2017.140 shu

BiPO₄/Ag₃PO₄ p-n Heterojunction with Enhanced Photocatalytic Activity under Simulated Sunlight Irradiation

1.
School of Environment, Northeast Normal University, Changchun 130117, China
2.
School of Chemistry, Northeast Normal University, Changchun 130024, China

Corresponding author: YANG Xia, yangx881@nenu.edu.cn; YU Hong-Bin, yuhb108@nenu.edu.cn
Received Date: 4 January 2017
Revised Date: 9 May 2017

Figures(10)

BiPO₄, Ag₃PO₄ and BiPO₄/Ag₃PO₄ heterostructure photocatalysts were synthesized by one-step hydro-thermal method.X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS) techniques were used to characterize morphology, crystal structure, and absorption spectrum.The SEM results showed that the BiPO₄/Ag₃PO₄ sample was in blocky structure and BiPO₄ distributed on the surface of Ag₃PO₄.The XRD of BiPO₄/Ag₃PO₄ sample displayed monoclinic and cubic crystal structure.The UV-Vis DRS spectra results indicated that the BiPO₄/Ag₃PO₄ sample displayed obviously red shifts compared to BiPO₄ and the light absorption range broaden to 571 nm.Moreover, the photocatalytic activity was evaluated by photodegradation of methyl orange (MO) and gatifloxacin solution under simulated sunlight irradiation.BiPO₄/Ag₃PO₄ exhibits higher degradation and mineralized activities and the better stability on degradation of methyl orange and gatifloxacin than the single BiPO₄ and Ag₃PO₄.Moreover, the test of active radical showed that the h⁺ was the main active radical in the degradation process, ·O₂^- was weaker.The enhanced photocatalytic activity and stability of BiPO₄/Ag₃PO₄ was mainly attributes to the formation of p-n heterojunction interface in BiPO₄/Ag₃PO₄ which facilitated the transfer and separation of photogenerated electron-hole pairs confirmed by the results of transient photocurrent response and electrochemical impedance spectroscopy measurement.Based on the above results, the photocatalytic mechanism for organics degradation over BiPO₄/Ag₃PO₄ was proposed.
- BiPO₄/Ag₃PO₄,
- photocatalytic,
- simulated sunlight,
- methyl orange,
- gatifloxacin
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沈阳化工大学材料科学与工程学院沈阳 110142

BiPO4/Ag3PO4 p-n Heterojunction with Enhanced Photocatalytic Activity under Simulated Sunlight Irradiation

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BiPO₄/Ag₃PO₄ p-n Heterojunction with Enhanced Photocatalytic Activity under Simulated Sunlight Irradiation