Graphene oxide modified graphitic carbon nitride as a modifier for thin film composite forward osmosis membrane

Abstract Reduced graphene oxide (rGO) modified graphitic carbon nitride (g-C 3 N 4 ), CN/rGO, was synthesized as a modifier for porous polyethersulfone (PES) substrate for the preparation of thin film composite (TFC) polyamide forward osmosis (FO) membrane. The effect of CN/rGO addition on the PES substrate formation was investigated using viscosity and light transmittance measurements, and the PES–CN/rGO substrates and the FO membranes were characterized by SEM, TEM, AFM, XPS and contact angle measurements. The results indicated that the addition of CN/rGO had a significant effect on the membrane properties. The FO membrane with an appropriate amount of CN/rGO in the PES substrate exhibited excellent FO performance. The osmotic water flux with 0.5 wt% CN/rGO in the substrate of TFC membrane reached 41.4 LMH using 2 M NaCl as draw solution and deionized water as feed, which was around 20% greater than with the control membrane without CN/rGO. The FO performance improvement should be attributed to the modified structure of the PES substrate, and thus lower structure parameter and the reduction of ICP. This study suggests that CN/rGO is an effective additive for modifying the porous substrate for the development of FO membranes.

[1]  P. Ajayan,et al.  Exfoliated Graphitic Carbon Nitride Nanosheets as Efficient Catalysts for Hydrogen Evolution Under Visible Light , 2013, Advanced materials.

[2]  Chuyang Y. Tang,et al.  Nanocomposite substrates for controlling internal concentration polarization in forward osmosis membranes , 2013 .

[3]  B. Bruggen,et al.  Improved membrane structures for seawater desalination by studying the influence of sublayers , 2012 .

[4]  M. Elimelech,et al.  The Future of Seawater Desalination: Energy, Technology, and the Environment , 2011, Science.

[5]  R. Schlögl,et al.  Graphitic carbon nitride materials: variation of structure and morphology and their use as metal-free catalysts , 2008 .

[6]  L. Niu,et al.  Non-covalent doping of graphitic carbon nitride polymer with graphene: controlled electronic structure and enhanced optoelectronic conversion , 2011 .

[7]  Thomas J. Hamlin,et al.  Novel hydrophilic nylon 6,6 microfiltration membrane supported thin film composite membranes for engineered osmosis , 2013 .

[8]  Chuan Yi Tang,et al.  A 2.|E|-Bit Distributed Algorithm for the Directed Euler Trail Problem , 1993, Inf. Process. Lett..

[9]  Nhu-Ngoc Bui,et al.  Hydrophilic nanofibers as new supports for thin film composite membranes for engineered osmosis. , 2013, Environmental science & technology.

[10]  Bicai Pan,et al.  Enhanced photoresponsive ultrathin graphitic-phase C3N4 nanosheets for bioimaging. , 2013, Journal of the American Chemical Society.

[11]  M. Jaroniec,et al.  Preparation and Enhanced Visible-Light Photocatalytic H2-Production Activity of Graphene/C3N4 Composites , 2011 .

[12]  Jincai Su,et al.  Sublayer structure and reflection coefficient and their effects on concentration polarization and me , 2011 .

[13]  Jessica D. Schiffman,et al.  Nanofibers in thin-film composite membrane support layers: Enabling expanded application of forward and pressure retarded osmosis , 2013 .

[14]  Menachem Elimelech,et al.  High performance thin-film composite forward osmosis membrane. , 2010, Environmental science & technology.

[15]  Tom Depuydt,et al.  Forward and pressure retarded osmosis: potential solutions for global challenges in energy and water supply. , 2013, Chemical Society reviews.

[16]  Kai Yu Wang,et al.  Developing thin‐film‐composite forward osmosis membranes on the PES/SPSf substrate through interfacial polymerization , 2012 .

[17]  N. Widjojo,et al.  A sulfonated polyphenylenesulfone (sPPSU) as the supporting substrate in thin film composite (TFC) membranes with enhanced performance for forward osmosis (FO) , 2013 .

[18]  Menachem Elimelech,et al.  Reverse draw solute permeation in forward osmosis: modeling and experiments. , 2010, Environmental science & technology.

[19]  Menachem Elimelech,et al.  A method for the simultaneous determination of transport and structural parameters of forward osmosis membranes , 2013 .

[20]  Junhong Chen,et al.  Constructing 2D Porous Graphitic C3N4 Nanosheets/Nitrogen‐Doped Graphene/Layered MoS2 Ternary Nanojunction with Enhanced Photoelectrochemical Activity , 2013, Advanced materials.

[21]  Leyuan Shi,et al.  Effect of substrate structure on the performance of thin-film composite forward osmosis hollow fiber membranes , 2011 .

[22]  Linda Zou,et al.  Recent developments in forward osmosis : opportunities and challenges. , 2012 .

[23]  Rong Wang,et al.  Synthesis and characterization of flat-sheet thin film composite forward osmosis membranes , 2011 .

[24]  P. Sukitpaneenit,et al.  High performance thin-film composite forward osmosis hollow fiber membranes with macrovoid-free and highly porous structure for sustainable water production. , 2012, Environmental science & technology.

[25]  Tai-Shung Chung,et al.  Forward osmosis processes: Yesterday, today and tomorrow , 2012 .

[26]  B. Bruggen,et al.  Effect of the Manufacturing Conditions on the Structure and Performance of Thin-Film Composite Membranes , 2012 .

[27]  Mohsen Jahanshahi,et al.  Synthesis of novel thin film nanocomposite (TFN) forward osmosis membranes using functionalized multi-walled carbon nanotubes , 2013 .

[28]  Klaus Müllen,et al.  Graphene-based carbon nitride nanosheets as efficient metal-free electrocatalysts for oxygen reduction reactions. , 2011, Angewandte Chemie.

[29]  Menachem Elimelech,et al.  Relating performance of thin-film composite forward osmosis membranes to support layer formation and , 2011 .

[30]  Martin Weber,et al.  Development of thin-film composite forward osmosis hollow fiber membranes using direct sulfonated polyphenylenesulfone (sPPSU) as membrane substrates. , 2013, Environmental science & technology.

[31]  Xiaoxiao Song,et al.  Nano Gives the Answer: Breaking the Bottleneck of Internal Concentration Polarization with a Nanofiber Composite Forward Osmosis Membrane for a High Water Production Rate , 2011, Advanced materials.

[32]  Hui‐Ming Cheng,et al.  Graphene‐Like Carbon Nitride Nanosheets for Improved Photocatalytic Activities , 2012 .

[33]  M. Antonietti,et al.  Synthesis of g‐C3N4 Nanoparticles in Mesoporous Silica Host Matrices , 2005 .

[34]  Tongwen Xu,et al.  Preparation of polyethersulfone/carbon nanotube substrate for high-performance forward osmosis membrane , 2013 .

[35]  Li Xu,et al.  Exfoliated graphene-like carbon nitride in organic solvents: enhanced photocatalytic activity and highly selective and sensitive sensor for the detection of trace amounts of Cu2+ , 2014 .