Facile fabrication of 3D ferrous ion crosslinked graphene oxide hydrogel membranes for excellent water purification

2019 ◽  
Vol 6 (10) ◽  
pp. 3060-3071 ◽  
Author(s):  
Zhangjingzhi Chen ◽  
Jun Wang ◽  
Xiaoguang Duan ◽  
Yuanyuan Chu ◽  
Xiaoyao Tan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Water Purification ◽  
High Surface ◽  
Ferrous Ion ◽  
Porous Structures ◽  
Water Pollutants ◽  
3D Graphene ◽  
Surface Areas ◽  
Hydrogel Membranes ◽  
Facile Fabrication

3D graphene-based macrostructures have been recognized as promising candidates for adsorption and separation of water pollutants due to their well-defined porous structures and high surface areas.

Facile fabrication of carboxymethyl cellulose sodium/graphene oxide hydrogel microparticles for water purification

RSC Advances ◽  
2016 ◽  
Vol 6 (55) ◽  
pp. 50061-50069 ◽  
Author(s):  
Jingjing Liu ◽  
Huijuan Chu ◽  
Hongliang Wei ◽  
Hongzheng Zhu ◽  
Gang Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Spray Drying ◽  
Water Purification ◽  
Carboxymethyl Cellulose ◽  
Hydrogel Microparticles ◽  
Carboxymethyl Cellulose Sodium ◽  
Facile Fabrication

Carboxymethyl cellulose sodium (CMCNa)/graphene oxide (GO) hydrogel microparticles (CGs) with the diameter of 2.2–3.6 μm were prepared facilely via spray drying and used as adsorbents for water purification.

scholarly journals Design of 3D Graphene-Oxide Spheres and Their Derived Hierarchical Porous Structures for High Performance Supercapacitors

Small ◽  
2017 ◽  
Vol 13 (44) ◽  
pp. 1702474 ◽  
Author(s):  
Zhuangnan Li ◽  
Srinivas Gadipelli ◽  
Yuchen Yang ◽  
Zhengxiao Guo
Keyword(s):  
Graphene Oxide ◽  
High Performance ◽  
Porous Structures ◽  
3D Graphene ◽  
Hierarchical Porous

scholarly journals Nanoporous Crystalline Composite Aerogels with Reduced Graphene Oxide

Molecules ◽  
2020 ◽  
Vol 25 (22) ◽  
pp. 5241
Author(s):  
Christophe Daniel ◽  
Baku Nagendra ◽  
Maria Rosaria Acocella ◽  
Esther Cascone ◽  
Gaetano Guerra
Keyword(s):  
Graphene Oxide ◽  
Benzyl Alcohol ◽  
Reduced Graphene Oxide ◽  
High Surface ◽  
High Porosity ◽  
Surface Areas ◽  
Reduced Graphene ◽  
Fibrillar Morphology ◽  
Composite Aerogels

High-porosity monolithic composite aerogels of syndiotactic polystyrene (sPS) and poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) containing reduced graphene oxide (r-GO) were prepared and characterized. The composite aerogels obtained by supercritical carbon dioxide (scCO2) extraction of sPS/r-GO and PPO/r-GO gels were characterized by a fibrillar morphology, which ensured good handling properties. The polymer nanoporous crystalline phases obtained within the aerogels led to high surface areas with values up to 440 m2 g−1. The role of r-GO in aerogels was studied in terms of catalytic activity by exploring the oxidation capacity of composite PPO and sPS aerogels toward benzyl alcohol in diluted aqueous solutions. The results showed that, unlike sPS/r-GO aerogels, PPO/r-GO aerogels were capable of absorbing benzyl alcohol from the diluted solutions, and that oxidation of c.a. 50% of the sorbed benzyl alcohol molecules into benzoic acid occurred.

scholarly journals Designing Dual-Function Nanostructures for Water Purification in Sunlight

2020 ◽  
Vol 10 (5) ◽  
pp. 1786 ◽  
Author(s):  
Osama Saber ◽  
Hicham Mahfoz Kotb
Keyword(s):  
Graphene Oxide ◽  
Photocatalytic Degradation ◽  
Water Purification ◽  
High Surface ◽  
High Surface Area ◽  
Building Blocks ◽  
Band Gap Energy ◽  
Dual Process ◽  
Dual Function ◽  
Photoactive Materials

The current study aims at combining two building blocks together into well-designed nanostructures to act as dual-function materials; active photocatalysts in sunlight and effective adsorbents for increasing the efficiency of water purification. By these nanostructures, we could avoid the drawbacks of the existing technologies for water purification and remove the industrial pollutants by a dual process; adsorption and photocatalytic degradation. In this trend, Zn-Al layered double hydroxides (LDHs) are combined with graphene oxide to produce a series of nanolayered structures. These nanolayered structures are effective for converting Zn-Al LDHs to be photo-active in sunlight through decreasing its band gap energy from 5.5 eV to 2.5 eV. In addition, these nanolayered structures caused complete decolorization and mineralization of green dyes in sunlight through accelerating the reaction rate of the photocatalytic degradation of dyes seven times higher than that of the pure Zn-Al LDHs. In the same time, they improved the adsorption process of green dyes through creating new micro- and meso-porous structures and high surface area for Zn-Al LDHs. Finally, the well-designed nanostructures between Zn-Al LDHs and graphene oxide led to converting non-photoactive materials to be active in the visible light in addition to a complete and fast removal for organic pollutants.

scholarly journals Three-dimensional graphene networks: synthesis, properties and applications

2014 ◽  
Vol 2 (1) ◽  
pp. 40-53 ◽  
Author(s):  
Yanfeng Ma ◽  
Yongsheng Chen
Keyword(s):  
Graphene Oxide ◽  
Three Dimensional ◽  
Porous Structures ◽  
Intrinsic Properties ◽  
Surface Areas ◽  
Synthesis Properties ◽  
Potential Applications ◽  
Specific Surface Areas ◽  
Graphene Foams ◽  
Mechanical Strengths

Abstract Recently, three-dimensional graphene/graphene oxide (GO) networks (3DGNs) in the form of foams, sponges and aerogels have attracted much attention. 3D structures provide graphene materials with high specific surface areas, large pore volumes, strong mechanical strengths and fast mass and electron transport, owing to the combination of the 3D porous structures and the excellent intrinsic properties of graphene. This review focuses on the latest advances in the preparation, properties and potential applications of 3D micro-/nano-architectures made of graphene/GO-based networks, with emphasis on graphene foams and sponges.

A Highly Crystalline Anthracene-Based MOF-74 Series Featuring Electrical Conductivity and Luminescence

2019 ◽  
Author(s):  
Patricia Scheurle ◽  
Andre Mähringer ◽  
Andreas Jakowetz ◽  
Pouya Hosseini ◽  
Alexander Richter ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Metal Ions ◽  
Light Emission ◽  
Block Design ◽  
High Surface ◽  
Visible Spectrum ◽  
Building Blocks ◽  
Divalent Metal Ions ◽  
Conductivity Enhancement ◽  
Surface Areas

Recently, a small group of metal-organic frameworks (MOFs) has been discovered featuring substantial charge transport properties and electrical conductivity, hence promising to broaden the scope of potential MOF applications in fields such as batteries, fuel cells and supercapacitors. In combination with light emission, electroactive MOFs are intriguing candidates for chemical sensing and optoelectronic applications. Here, we incorporated anthracene-based building blocks into the MOF-74 topology with five different divalent metal ions, that is, Zn2+, Mg2+, Ni2+, Co2+ and Mn2+, resulting in a series of highly crystalline MOFs, coined ANMOF-74(M). This series of MOFs features substantial photoluminescence, with ANMOF-74(Zn) emitting across the whole visible spectrum. The materials moreover combine this photoluminescence with high surface areas and electrical conductivity. Compared to the original MOF-74 materials constructed from 2,5-dihydroxy terephthalic acid and the same metal ions Zn2+, Mg2+, Ni2+, Co2+ and Mn2+, we observed a conductivity enhancement of up to six orders of magnitude. Our results point towards the importance of building block design and the careful choice of the embedded MOF topology for obtaining materials with desired properties such as photoluminescence and electrical conductivity.

Functionalized Nano-graphene Oxide as Multi-modal Clinic for Effective Drug Delivery

2017 ◽  
Vol 10 (4) ◽  
pp. 3768-3771
Author(s):  
Soumitra Satapathi ◽  
Rutusmita Mishra ◽  
Manisha Chatterjee ◽  
Partha Roy ◽  
Somesh Mohapatra
Keyword(s):  
Drug Delivery ◽  
Graphene Oxide ◽  
Cancer Cell ◽  
High Surface ◽  
High Surface Area ◽  
Cancer Cell Line ◽  
Xrd Analysis ◽  
Graphene Derivatives ◽  
Nano Graphene

Nano-materials based drug delivery modalities to specific organs and tissues has become one of the critical endeavors in pharmaceutical research. Recently, two-dimensional graphene has elicited considerable research interest because of its potential application in drug delivery systems. Here we report, the drug delivery applications of PEGylated nano-graphene oxide (nGO-PEG), complexed with a multiphoton active and anti-cancerous diarylheptanoid drug curcumin. Specifically, graphene-derivatives were used as nanovectors for the delivery of the hydrophobic anticancer drug curcumin due to its high surface area and easy surface functionalization. nGO was synthesized by modified Hummer’s method and confirmed by XRD analysis. The formation of nGO, nGO-PEG and nGO-PEG-Curcumin complex were monitored through UV-vis, IR spectroscopy. MTT assay and AO/EB staining found that nGO-PEG-Curcumin complex afforded highly potent cancer cell killing in vitro with a human breast cancer cell line MCF7.

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