Study On Oil Water Separation Membrane Material With Photodegradation Function

At present,the oily wastewater produced in the process of crude oil exploitation,processing and industrial production poses a serious threat to the ecological environment and human health,so the purification of oily wastewater has become an important problem to be solved in the scientific and industrial circles.At present,oil-water separation is the main direction of oily wastewater purification,so the oil-water separation material with high separation efficiency and recyclability as a green and feasible environmental treatment material has attracted great attention of researchers.The removal of impurities in water is also one of the contents of water purification,and the common means is photocatalytic degradation.In this work,the oil-water separation materials and photocatalytic degradation materials were combined,and nano particles with photocatalytic activity were introduced into the preparation of oil-water separation membrane to achieve the rapid and effective separation of oil and water and purify the water at the same time.Finally,the oil-water separation membrane materials with photocatalytic degradation function were obtained.The specific work contents are as follows:Functional composite cotton fabric（G-TiO₂/VTMS/Cot）was prepared by spray method.3-MPTMS modified TiO₂ nanoparticles were sprayed on VTMS treated cot surface to obtain superhydrophobic and photocatalytic G-TiO₂/VTMS/Cot with WCA of 150.71°,The degradation rate of Rh B in water is 93%in 45 min,after more than 10 cycles,the degradation rate of fabric is still about 89%,and the WCA is only reduced from 150.71%to 147.43°,the excellent properties of the fabric provide a new idea for the practical application of oily wastewater treatment and environmental remediation.Functional copper meshes（TiO₂@Cu₃（PO₄）₂@COM and g-C₃N₄@Cu₃（PO₄）₂@COM）were prepared by electrochemical deposition and electrophoresis with OCA of 153.67°and153.65°,and oil/water separation efficiency of 97%and 96%,respectively.The degradation rate of Rh B reached 77%and 97%respectively in 120 min under full light irradiation.The water fluxes were 3846 L/m²h and 3791 L/m²h,respectively.After 10 cycles of testing,the oil-water separation efficiency is almost unchanged.This work provides a simple and feasible strategy for the preparation of composite functional materials with photocatalysis and oil-water separation.