Highly permeable and antifouling reverse osmosis membranes with acidified graphitic carbon nitride nanosheets as nanofillers

Gao, Xiang; Li, Yiming; Yang, Xiaolong; Shang, Yanan; Wang, Yong; Gao, Baoyu; Wang, Zhining

doi:10.1039/c7ta06348b

Cited by 107 publications

(32 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The SEM and 3D-AFM images of TFC and TFN membranes are presented in Figure 4 . The base membrane showed a “leaf-like” surface, consistent with the literature [ 27 , 28 , 29 ]. Partial aggregation of NPs could be observed in the membrane impregnated with high concentration of NPs, indicated by red arrow.…”

Section: Resultssupporting

confidence: 90%

TiO2 Polyamide Thin Film Nanocomposite Reverses Osmosis Membrane for Water Desalination

Mayyahi

2018

Membranes

View full text Add to dashboard Cite

In this study, TiO2 nanoparticles were inserted into the polyamide layer of traditional thin film composite membrane. The nanoparticles were dispersed in a trimesoyl chloride-hexane solution before interfacial polymerization with m-phenylenediamine-aqueous solution. Membrane characterization was performed via contact angle measurements, atomic force microscopy (AFM), scanning electron microscopy (SEM), and water flux, salt rejection, and fouling resistance evaluation. The results indicate that TiO2 could effectively improve membrane performance. Water flux increased from 40 to 65 L/m² h by increasing NPs concentration from 0 to 0.1 wt. %, while NaCl rejection was above 96%. Moreover, the modified membrane demonstrated better organic fouling resistance and robust antibacterial efficiency.

show abstract

Section: Resultssupporting

confidence: 90%

TiO2 Polyamide Thin Film Nanocomposite Reverses Osmosis Membrane for Water Desalination

Mayyahi

2018

Membranes

View full text Add to dashboard Cite

show abstract

“…Also in a PA nanofiltration membrane, modification with g-C 3 N 4 nanosheets was shown to improve the permeability, antifouling properties, hydrophilicity, negative charge density, roughness and thermal stability [25]. Similar conclusions were reached for reverse osmosis PA membranes doped with acidified g-C 3 N 4 by Gao et al [26]. Doping g-C 3 N 4 into a sodium alginate matrix or into poly(vinyl alcohol) also improved the performance of hybrid membranes for water/ethanol separation [27,28]; and doping of g-C 3 N 4 co-impregnated with Cu + and Fe 2+ ions into a Pebax ® membrane improved gasoline desulfurization [29].…”

Section: Introductionmentioning

confidence: 74%

Effects of Protonation, Hydroxylamination, and Hydrazination of g-C3N4 on the Performance of Matrimid®/g-C3N4 Membranes

et al. 2018

View full text Add to dashboard Cite

One of the challenges to continue improving polymeric membranes properties involves the development of novel chemically modified fillers, such as nitrogen-rich 2-D nanomaterials. Graphitic carbon nitride (g-C3N4) has attracted significant interest as a new class of these fillers. Protonation is known to afford it desirable functionalities to form unique architectures for various applications. In the work presented herein, doping of Matrimid® with protonated g-C3N4 to yield Matrimid®/g-C3N4 mixed matrix membranes was found to improve gas separation by enhancing the selectivity for CO2/CH4 by up to 36.9% at 0.5 wt % filler doping. With a view to further enhancing the contribution of g-C3N4 to the performance of the composite membrane, oxygen plasma and hydrazine monohydrate treatments were also assayed as alternatives to protonation. Hydroxylamination by oxygen plasma treatment increased the selectivity for CO2/CH4 by up to 52.2% (at 2 wt % doping) and that for O2/N2 by up to 26.3% (at 0.5 wt % doping). Hydrazination led to lower enhancements in CO2/CH4 separation, by up to 11.4%. This study suggests that chemically-modified g-C3N4 may hold promise as an additive for modifying the surface of Matrimid® and other membranes.

show abstract

“…Polyamide based thin-film composites also showed promise for the filtration of water. Various strategies have been employed in the past few decades for improving the performance of polyamide-based thin film composite (TFC) NF membranes (NFM), such as the alteration of the reaction monopolymers, [123] the tuning of chemical and physical structures of the porous substrates, [124] the incorporation of nanomaterials into the porous substrate or polyamide film, [125][126][127][128][129][130][131][132][133] as well as the introduction of a layer in-between the polyamide film and the substrate. Of these, the incorporation of nanomaterials into membranes is more popular for modifying the permeation properties of the polyamide selective layers.…”

Section: Removal Of Saltsmentioning

confidence: 99%

Nanocellulose as a sustainable material for water purification

et al. 2020

View full text Add to dashboard Cite

The demand for purified water has been increasing day by day. More feasible technologies, including membrane filtration, adsorbents, and so forth have emerged out to be more efficient and cheaper over conventional industrial methods. Nanocellulose, being biodegradable, nontoxic, and sustainable nanofiller exhibits excellent mechanical properties, high aspect ratio, high surface area, and more importantly tunable surface chemistry; is a potential candidate to be employed for water purification. Composite membranes and films for water filtration, constituting of biopolymers have gathered immense interest lately. Compared with its unmodified form, the functionalized NC enhances the compatibility with the matrix and readily forming strong network structures; essential for the formation of channels for better adsorption of impurities and higher water flux. This review highlights some of the recent studies dedicated to making and testing of nanofiltration membranes prepared using nanocellulose and its different functionalized derivatives.

show abstract

Highly permeable and antifouling reverse osmosis membranes with acidified graphitic carbon nitride nanosheets as nanofillers

Cited by 107 publications

References 57 publications

TiO2 Polyamide Thin Film Nanocomposite Reverses Osmosis Membrane for Water Desalination

TiO2 Polyamide Thin Film Nanocomposite Reverses Osmosis Membrane for Water Desalination

Effects of Protonation, Hydroxylamination, and Hydrazination of g-C3N4 on the Performance of Matrimid®/g-C3N4 Membranes

Nanocellulose as a sustainable material for water purification

Contact Info

Product

Resources

About