Optimizing graphene oxide membranes for effective removal of dyes by modulating the reduction degree and doped nitrogen.

ABSTRACT: The excellent mechanical and chemical characteristics of graphene oxide (GO) enable their potential application in the realm of membrane separation. However, the expansion and instability of GO nanosheets in water limit its application. In this work, nitrogen-doped GO (NGO) was obtained by a harmless hydrothermal reduction method. The obtained NGO films were attached to a polyvinylidene fluoride support membrane by vacuum filtration. By changing the hydrothermal reaction temperature, the reduction degree of GO and doping amount of nitrogen was adjusted to control the inter-layer structure and permeability of NGO. The defect of NGO nanosheets and the reduction of oxygen-containing functional groups could accelerate the transportation of water molecules through the inter-layer space of the h

SUBMITTER: Bai J 

PROVIDER: S-EPMC9041406 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature