Synthesis and Characterization of g-C 3 N 4 /Ag 3 PO 4 /TiO 2 /PVDF Membrane with Remarkable Self-Cleaning Properties for Rhodamine B Removal

Renguo Liu, Xue Li (), Jinhui Huang (), Haoliang Pang, Qiongfang Wan, Kun Luo, Ya Pang and Lingyu Wang
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Renguo Liu: Hunan Key Laboratory of Applied Environmental Photocatalysis, Changsha University, Changsha 410022, China
Xue Li: Hunan Key Laboratory of Applied Environmental Photocatalysis, Changsha University, Changsha 410022, China
Jinhui Huang: College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
Haoliang Pang: College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
Qiongfang Wan: College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
Kun Luo: Hunan Key Laboratory of Applied Environmental Photocatalysis, Changsha University, Changsha 410022, China
Ya Pang: Hunan Key Laboratory of Applied Environmental Photocatalysis, Changsha University, Changsha 410022, China
Lingyu Wang: Hunan Key Laboratory of Applied Environmental Photocatalysis, Changsha University, Changsha 410022, China

IJERPH, 2022, vol. 19, issue 23, 1-16

Abstract: g-C 3 N 4 /Ag 3 PO 4 /TiO 2 nanocomposite materials were loaded onto a polyvinylidene fluoride (PVDF) membrane using a phase inversion method to obtain a photocatalytic flat membrane for dye removal. The morphology, structure, and photocatalytic activity of the g-C 3 N 4 /Ag 3 PO 4 /TiO 2 nanoparticles and composite membrane were evaluated. The g-C 3 N 4 /Ag 3 PO 4 /TiO 2 /PVDF membrane exhibited superior morphology, hydrophilic properties, and antifouling performance compared with the raw PVDF membrane. Four-stage filtration was performed to evaluate the self-cleaning and antifouling capacity of the g-C 3 N 4 /Ag 3 PO 4 /TiO 2 /PVDF membrane. Upon irradiating the composite membrane with visible light for 30 min, its irreversible fouling resistance (Rir) was low (9%), and its flux recovery rate (FRR) was high (71.0%) after five filtration cycles. The removal rate of rhodamine B (RhB) from the composite membrane under visible light irradiation reached 98.1% owing to the high photocatalytic activity of the membrane, which was superior to that of raw PVDF membrane (42.5%). A mechanism of photocatalytic composite membranes for RhB degradation was proposed. Therefore, this study is expected to broaden prospects in the field of membrane filtration technology.

Keywords: g-C 3 N 4 /Ag 3 PO 4 /TiO 2 nanocomposite; photocatalytic membrane; self-cleaning; membrane fouling; dye (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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