Study on dispersion of SiO2/g-C3N4 on polyvinylidene fluoride substrate and photocatalytic activity in decomposing RhB solution in aqueous environment
Abstract
SiO 2 /g-C 3 N 4 material was dispersed onto polyvinylidene fluoride (PVDF) membrane by the phase inversion method to obtain a photocatalytic membrane for decomposing organic dye rhodamine B (RhB) in aqueous medium under visible light. The morphology, structure, and photocatalytic activity of single and composite materials deposited on PVDF membranes were evaluated. With SiO 2 /g-C 3 N 4 composite material having more porous properties and more defect locations than single SiO 2 or g-C 3 N 4 materials when dispersed onto the membrane, the photocatalytic efficiency of the material is significantly improved. Specifically, the degradation efficiency of RhB from SiO 2 /g-C 3 N 4 /PVDF composite membrane under the influence of visible light reached 81.35%, which was superior to g-C 3 N 4 /PVDF (46.07%) and SiO 2 /PVDF (14.79%). Therefore, this study is expected to expand the prospects in the field of membrane filtration technology .