Processable graphene oxide-embedded titanate nanofiber membranes with improved filtration performance

Abstract

Processable graphene oxide-embedded titanate nanofiber membranes with improved filtration performance, Journal of Hazardous Materials http://dx.doi.org/10.1016/j.jhazmat. 2016.11.077 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Highlights Graphene oxide embedded titanate fiber films with good processability are prepared  The content of graphene oxide sheets and thickness of films can be adjusted easily  Embedded graphene oxide sheets improve the filtration property of fibrous films  Such composite films also exhibit enhanced selectivity performance. Abstract 3Graphene oxide (GO)-embedded titanate nanofiber (TNF) membranes with improved filtration performance are prepared successfully by a two-step method including electrostatic assembly of GO and TNFs into hybrids and subsequent processing of them into membranes by vacuum filtration. The embedded contents of GO sheets in films and thickness of as-assembled films can be adjusted facilely, endowing such composite films with good processability. Owing to the skilful introduction of GO sheets, the pore and/or channel structures in these hybrid membranes are modified. By treating different dye solutions (Direct Yellow and Direct Red), the filtration properties of these membranesshow that the introduction of certain amount of GO sheets efficiently improve the separation performance of the membranes. Interestingly, these GO-embedded TNF membranes also display superior selective separation performance on filtrating the mixture solutions of such two dyes, making these hierarchical membranes more flexible and versatile in water treatment areas.

Bioinspired gradient-structured wood interfaces achieving efficient ion diffusion to generate electricity from natural evaporation

“…This is because the GO akes increase the distances between nanobers, leading to increased interber voids. 43,44 As expected, this high SSA and porous structure facilitates water evaporation and has been shown to be conducive to mass transport, [45][46][47] providing significant advantages for power output (Fig. S10 †).…”

Graphene Oxide and Carbon Nanotubes-Based Polyvinylidene Fluoride Membrane for Highly Increased Water Treatment

“…Wu et al [ 12 ] achieved 97% filtration rate for 1,1,1-trichloroethane (TCA) in PVDF membrane using LiCl-H2O as an additive. In addition, Xu et al [ 29 ] used titanate nanofiber membranes (TNF) for the separation of direct yellow (DY) dye solution and the removal rate was 55.8%, while the maximum removal rate for chromaticity was 90.28% for our prepared membrane. The removal of magnesium from water was experimented by Malakootian et al [ 13 ] using a commercial nano-filtration membrane and the removal rate of magnesium was 62.26% and on the other hand, in the case of our experiment, it reached 70.74%.…”

“…In the case of GO, various oxygen functional groups, such as carbonyl groups (C=O), carboxyl groups (–COOH), and hydroxyl groups (–OH), are combined so that the dispersion is stable in aqueous solutions and organic solvents. Additionally, since it is possible to develop a variety of properties that polymer materials do not have when used with other polymer materials, such studies are ongoing [ 29 , 30 , 31 ].…”

High-performance multifunctional electrospun fibrous air filter for personal protection: A review

“…In addition, inorganic matters containing ionizable ions and groups represented by metal organic frameworks (MOFs) and graphene oxide (GO) are another way to realize functional group interaction [66] , [117] , [118] , [119] , [120] , [121] . MOF is composed of metal containing nodes (ions or clusters) and organic connectors, which contain a large number of ionizable metal ions for electrostatic adsorption [122] .…”