Graphene Oxide Quantum Dots Incorporated into a Thin Film Nanocomposite Membrane with High Flux and Antifouling Properties for Low-Pressure Nanofiltration

Zhang, Chunfang; Wei, Kaifang; Zhang, Wen-Hai; Bai, Yunxiang; Sun, Yan; Gu, Junjie

doi:10.1021/acsami.6b12826

Cited by 314 publications

(129 citation statements)

References 53 publications

Supporting

Mentioning

113

Contrasting

Order By: Relevance

“…Through a chemical oxidation process using spent coffee grounds as the carbon source, Xu et al prepared GQDs with a high yield, which were further assembled in membranes with a high degree of oxygenation enabling the efficient removal of a wide range of water pollutants, from organic compounds to heavy metals, with a high flux rate . GQD‐based composite membranes with different polymers have been used for the removal of various industrial dyes, such as Congo red (99.8%), methylene blue (97.6%), methyl orange (99.2%), and rhodamine (99.7%) . They also showed a remarkable desalination efficiency with a water flux of 88.7 L m −2 h −1 bar −1 and highly efficient salt rejection rate of 99%.…”

Section: Environmental Applicationsmentioning

confidence: 99%

Recent Advances in Graphene Quantum Dots: Synthesis, Properties, and Applications

et al. 2018

View full text Add to dashboard Cite

Here, an interesting, new 0D material is presented: graphene quantum dots. The new properties arising from quantum confinement and edge effects after converting 2D graphene into graphene quantum dots have attracted great interest in various disciplines, such as physics, biology, materials, and chemistry. Here, the recent technological advances in the field of graphene quantum dots reported in the literature on both a theoretical and an experimental basis are highlighted. Various synthesis methodologies and physical properties are discussed, along with their implementation in energy (supercapacitors, fuel cells, photovoltaic devices, light-emitting diodes), biomedical (biosensors, drug delivery, bioimaging), and environmental applications.

show abstract

Section: Environmental Applicationsmentioning

confidence: 99%

Recent Advances in Graphene Quantum Dots: Synthesis, Properties, and Applications

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Zhang et al [166] fabricated graphene oxide quantum dots (GOQDs) dispersed within thin film nano-composite membrane via interfacial polymerization for low pressure nano-filtration membranes. Their results demonstrated that GOQDs membranes with smooth surface have more hydrophilicity, more porosity, high antifouling property and good stability during the filtration process.…”

Section: Role Of Graphene Oxide In Polymer Nano-composite Membranesmentioning

confidence: 99%

A Comprehensive Review on Polymeric Nano-Composite Membranes for Water Treatment

Zahid¹,

Rashid²,

Akram³

et al. 2018

J Membr Sci Technol

181

View full text Add to dashboard Cite

During last few decades, membrane technology has emerged as an efficient technique over conventional methods due to its high removal capacity, ease in operation and cost effectiveness for wastewater treatment and production of clean water. Membrane based separations are commonly based on polymeric membranes because of their higher flexibility, easily pore forming mechanism, low cost and smaller space for installation as compared to inorganic membranes. Commonly employed membrane fabrication phase inversion method has been shortly reviewed in this article. Major limitation of membrane based separations is fouling and polymeric membranes being hydrophobic in nature are more prone to fouling. Fouling is a deposition of various colloidal particles, macromolecules (polysaccharides, proteins), salts etc. on membrane surface and within pores thus impedes membrane performance, reduces flux and results in high cost. Modification of polymeric membranes due to its tailoring ability with nanomaterials such as metal based and carbon based results in polymeric nano-composite membranes with high antifouling characteristics. Nanomaterials impart high selectivity, permeability, hydrophilicity, thermal stability, mechanical strength, and antibacterial properties to polymeric membranes via blending, coating etc. modification methods. Characterization techniques has also discussed in later section for studying morphological properties and performance of polymer nano-composite membranes. Graphical Abstract

show abstract

“…In another fabrication approach, g‐C 3 N 4 /rGO was prepared through the in situ polycondensation of cyanamide on the surface of GO sheets . GO quantum dots (GOQDs) have been recently utilized to enhance the performance of membranes . These dots combine the unique properties of both GO and quantum dots and show excellent dispersibility in polymer matrices owing to their particular shape, size, and edge structure.…”

Section: Preparation Of Functionalized Graphenementioning

confidence: 99%

“…The incorporation of GO, rGO/TiO 2 , and GO/ZIF‐8 into the PIP‐/TMC‐based active layer has been reported, and the prepared hybrid membranes showed high Na 2 SO 4 rejection abilities. Zhang et al dispersed GOQD in a TA aqueous solution by means of ultrasonication. The aqueous phase was then reacted with isophorone diisocyanate (IPDI) in organic solution to initiate IP.…”

Section: Preparation Of Functionalized Graphene–polymer Membranesmentioning

confidence: 99%

Graphene Oxide‐Based Polymeric Membranes for Water Treatment

Xiao

Zhao

Tian

et al. 2018

Adv Materials Inter

View full text Add to dashboard Cite

their energy consumption is much lower than that of thermal approaches. [3] Therefore, membrane technologies are regarded as cost-effective candidates and play an increasingly important role in the treatment of natural waters and wastewaters. [4] Membrane processes for water purification and desalination can be generally classified into microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), reverse osmosis (RO), and emerging forward osmosis (FO) according to the pore size of the membrane and the respective rejection mechanism. The materials used to fabricate the membranes cover a wide range of polymers and inorganic materials. By far, polymeric membranes are the most widespread type due to their high processability, high flexibility, and low cost. [5][6][7] Traditional asymmetric membranes that contain only one type of polymer are mainly used for UF and a few NF applications. These membranes exhibit an asymmetric porous structure that consists of a thin nano porous active layer and a microporous underlying layer. MF membranes, however, possess a relatively symmetric micro porous structure. These porous membranes are mainly fabricated by phase inversion. For RO, FO, and most NF membranes that reject nanoscale solutes, an individual nonporous, dense, and thin polyamide (PA) active layer is normally required and is deposited onto a porous support layer to ensure a high selectivity. The active layer is prepared via interfacial polymerization (IP), while the support layer can be fabricated by phase inversion. These membranes are known as thin film composite (TFC) membranes, and the layers are comprised of different polymers. TFC membranes possess superior permeability over that of first-generation cellulose acetate membranes. [8,9] Although polymeric membranes have been widely reported in scientific studies and utilized for industrial applications, they are restricted by the inherent limitations of the material, such as a permeability/selectivity trade-off and a low fouling resistance. The current ability to control the membrane structure in both molecular-level design and fabrication process is not satisfactory. [10] In the last decade, the incorporation of nanomaterials into polymeric membranes has gained considerable attention owing to the potential of the resulting materials for overcoming the above limitations. [11,12] These advanced composite membranes have shown enhanced performance with a low loading of nanoparticles (NPs), including zeolites, [13][14][15] silica, [16][17][18][19][20][21][22] Membrane technologies for water treatment and desalination are increasingly developed and utilized to address the global challenges of water security and supply. Membrane-based separations can produce water with desirable qualities from a wide range of water sources, such as groundwater, seawater, brackish water, and wastewater. However, the membranes, which are typically made from polymers, are still restricted by their inherent limitations, including a permeability/selectivity trade-off and a high fouling prop...

show abstract

Graphene Oxide Quantum Dots Incorporated into a Thin Film Nanocomposite Membrane with High Flux and Antifouling Properties for Low-Pressure Nanofiltration

Cited by 314 publications

References 53 publications

Recent Advances in Graphene Quantum Dots: Synthesis, Properties, and Applications

Recent Advances in Graphene Quantum Dots: Synthesis, Properties, and Applications

A Comprehensive Review on Polymeric Nano-Composite Membranes for Water Treatment

Graphene Oxide‐Based Polymeric Membranes for Water Treatment

Contact Info

Product

Resources

About