scholarly journals Preparation of a graphene/silver hybrid membrane as a new nanofiltration membrane

RSC Advances ◽  
2017 ◽  
Vol 7 (77) ◽  
pp. 49159-49165 ◽  
Author(s):  
Gui-fei Liu ◽  
Lin-jun Huang ◽  
Yan-xin Wang ◽  
Jian-guo Tang ◽  
Yao Wang ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Composite Membrane ◽  
Reduction Method ◽  
Water Flux ◽  
Thermal Reduction ◽  
Hybrid Membrane ◽  
Nanofiltration Membrane ◽  
Reduced Graphene

In this study, we describe the preparation, characterization, water flux and rejection performance of a composite membrane formed from reduced graphene oxide (RGO) and silver nanoparticles (AgNP) via a rapid thermal reduction method.

Reduced Graphene Oxide Paper: Fabrication by a Green Thermal Reduction Method and Preliminary Study of its In Vitro Cytotoxicity

2017 ◽  
Vol 45 ◽  
pp. 199-207 ◽  
Author(s):  
Xin Wang ◽  
Peng Li ◽  
Claudia Luedecke ◽  
Qiang Zhang ◽  
Zan Wang ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Mammalian Cells ◽  
Reduction Method ◽  
Heating Temperature ◽  
Synthesis Method ◽  
Thermal Reduction ◽  
Graphene Films ◽  
Reduced Graphene

Graphene films have been intensively explored because of their unique mechanical and physicochemical properties for potential applications in field of tissue engineering and implants. However, for biomedical applications, it is necessary to fully understand the toxicity and biocompatibility of the prepared graphene films since different synthesis method might lead to different biological properties. Here we report a step-by-step thermal reduction method of preparing reduced graphene oxide (rGO) film directly on various substrates at low heating temperature (below about 200 °C) without requiring any chemical reduction agent like hydrazine or other reductants (therefore we call it green method). Slowly heating GO hydrosol that was coated on the surface of a glass cell-culture dish or inside of a polypropylene tube from room temperature to 60, 100, and 160 °C for 12 h, respectively, a shiny and flat surface without crumpled structure or tiny pores was formed. We peeled it off from the substrate to explore its cytotoxicity. The results exhibited that the rGO film was biocompatible with Cal-72 cell but against Escherichia coli bacteria. Our work confirmed that rGO film produced by the green reduction method is cytocompatible with mammalian cells, which makes this rGO film a promising material for tissue engineering scaffold or as a surface-modification coating of an implant.

Facile synthesis of thermally reduced graphene oxide-sepiolite nanohybrid via intercalation and thermal reduction method

2017 ◽  
Vol 135 ◽  
pp. 510-515 ◽  
Author(s):  
M.R. Vengatesan ◽  
S. Singh ◽  
S. Stephen ◽  
K. Prasanna ◽  
C.W. Lee ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Reduction Method ◽  
Thermal Reduction ◽  
Facile Synthesis ◽  
Reduced Graphene

Fabrication and biocompatibility of reduced graphene oxide/poly(vinylidene fluoride) composite membranes

RSC Advances ◽  
2015 ◽  
Vol 5 (121) ◽  
pp. 99841-99847 ◽  
Author(s):  
Supeng Pei ◽  
Fei Ai ◽  
Song Qu
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Reduction Method ◽  
Vinylidene Fluoride ◽  
Composite Membranes ◽  
Thermal Reduction ◽  
Reduced Graphene ◽  
Poly Vinylidene Fluoride ◽  
Good Biocompatibility

RGO/PVDF composite membranes with different RGO loadings were prepared by a convenient in situ thermal reduction method and the structural study reveals the good dispersion of RGO in the PVDF, moreover, RGO/PVDF membranes show good biocompatibility.

Band gap engineering of BiOI via oxygen vacancies induced by graphene for improved photocatalysis

2019 ◽  
Vol 43 (3) ◽  
pp. 1523-1530 ◽  
Author(s):  
Xuejun Ren ◽  
Jingwen Yao ◽  
Lei Cai ◽  
Jibiao Li ◽  
Xingzhong Cao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Band Gap ◽  
Reduced Graphene Oxide ◽  
Oxygen Vacancies ◽  
Reduction Method ◽  
Thermal Reduction ◽  
Band Gap Engineering ◽  
Bismuth Iodide ◽  
Reduced Graphene

A reduced graphene oxide–bismuth iodide oxide (rGO–BiOI) composite was prepared by a thermal reduction method.

Fabrication of reduced graphene oxide/metal (Cu, Ni, Co) nanoparticle hybrid composites via a facile thermal reduction method

RSC Advances ◽  
2015 ◽  
Vol 5 (62) ◽  
pp. 49973-49978 ◽  
Author(s):  
Xiubing Huang ◽  
Guixia Zhao ◽  
Xiangke Wang
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Reduction Method ◽  
Hybrid Composites ◽  
Thermal Reduction ◽  
Reduced Graphene

Reduced graphene oxide/metal (e.g., Cu, Ni, Co) nanoparticle hybrid composites were prepared via a facile thermal reduction method at 500 °C under flowing argon without any usage of external reductive gases.

scholarly journals Eco-Friendly Reduced Graphene Oxide Nanofilter Preparation and Application for Iron Removal

Separations ◽  
2021 ◽  
Vol 8 (5) ◽  
pp. 68
Author(s):  
Pankaj Kumar Jha ◽  
Watsa Khongnakorn ◽  
Chamorn Chawenjkigwanich ◽  
Md Shahariar Chowdhury ◽  
Kuaanan Techato
Keyword(s):  
Contact Angle ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Inductively Coupled Plasma ◽  
Membrane Filter ◽  
Water Flux ◽  
Water Filtration ◽  
Dimethyl Formamide ◽  
Reduced Graphene ◽  
Callistemon Viminalis

In this paper, the green synthesis of reduced graphene oxide (r-GO) nanomaterials using Callistemon viminalis leaf extract as a reducing and stabilizing agent is reported for the first time. The synthesized r-GO nanomaterials were characterized using UV–Vis, XRD, FE-SEM, TEM, and energy dispersive X-ray (EDX) analyses. The nanofilter membrane was prepared by varying the amounts of r-GO nanomaterials in a Polysulfone-N,N-dimethyl formamide (DMF) solution. The nanofilter membrane was characterized by the contact angle, atomic force microscopy (AFM), UV–Vis, and FTIR. The results confirm the formation of r-GO nanomaterials. Higher amounts of r-GO nanomaterials in the membrane show a lower contact angle, thus confirming their hydrophilic nature. Iron water filtration was performed with different amounts of r-GO nanomaterials in the membrane filter, and the water flux was smooth over an increased time period. Inductively Coupled Plasma (ICP) analysis showed a higher percentage of iron rejection (95.77%) when higher amounts (0.10 g) of r-GO nanomaterials were used in a mixed membrane (i.e., sample C). In conclusion, the findings illustrate that Callistemon viminalis mediates the synthesis of r-GO nanomaterials, which is useful in water filtration, and can be incorporated into membrane filters, since it removes iron.

Thermal reduction to control the spacing in graphene oxide membranes: effect on ion diffusion and electrical conduction

RSC Advances ◽  
2016 ◽  
Vol 6 (74) ◽  
pp. 70012-70017 ◽  
Author(s):  
A. Alhadhrami ◽  
S. Salgado ◽  
V. Maheshwari
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electrical Conduction ◽  
Thermal Reduction ◽  
Electrochemical Characteristics ◽  
Ion Diffusion ◽  
Layer Spacing ◽  
Reduced Graphene ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes

Inter-layer spacing in reduced graphene-oxide membranes which modulates their ion-diffusion electrical and electrochemical characteristics is controlled by temperature of thermal reduction.

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