scholarly journals A Novel Generation of Polysulfone/Crown Ether-Functionalized Reduced Graphene Oxide Membranes with Potential Applications in Hemodialysis

Polymers ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 148
Author(s):  
Andreea Madalina Pandele ◽  
Madalina Oprea ◽  
Andreea Aura Dutu ◽  
Florin Miculescu ◽  
Stefan Ioan Voicu
Keyword(s):  
Graphene Oxide ◽  
Crown Ether ◽  
Metal Ions ◽  
Reduced Graphene Oxide ◽  
Soft Tissues ◽  
Toxic Metal ◽  
Composite Membranes ◽  
Feed Solution ◽  
Membrane Thickness ◽  
Reduced Graphene

Heavy metal poisoning is a rare health condition caused by the accumulation of toxic metal ions in the soft tissues of the human body that can be life threatening if left untreated. In the case of severe intoxications, hemodialysis is the most effective method for a rapid clearance of the metal ions from the bloodstream, therefore, the development of hemodialysis membranes with superior metal ions retention ability is of great research interest. In the present study, synthetic polysulfone membranes were modified with reduced graphene oxide functionalized with crown ether, an organic compound with high metal ions complexation capacity. The physico-chemical characteristics of the composite membranes were determined by FT-IR, Raman, XPS and SEM analysis while their efficiency in retaining metal ions was evaluated via ICP-MS analysis. The obtained results showed that the thermal stability of reduced graphene oxide was improved after functionalization with crown ether and that the presence of the carbonaceous filler influenced the membranes morphology in terms of pore dimensions and membrane thickness. Moreover, the ability of Cu2+ ions retention from synthetic feed solution was up to three times higher in the case of the composite membranes compared to the neat ones.

Stripping voltammetric detection of copper ions using carbon paste electrode modified with aza-crown ether capped gold nanoparticles and reduced graphene oxide

RSC Advances ◽  
2016 ◽  
Vol 6 (92) ◽  
pp. 89167-89175 ◽  
Author(s):  
M. Ghanei-Motlagh ◽  
Ch. Karami ◽  
M. A. Taher ◽  
S. J. Hosseini-Nasab
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Crown Ether ◽  
Reduced Graphene Oxide ◽  
Copper Ions ◽  
Carbon Paste ◽  
Reduced Graphene ◽  
Voltammetric Detection ◽  
Paste Electrode ◽  
Kryptofix 21

A novel electrochemical sensor based on reduced graphene oxide (RGO) and kryptofix 21-capped gold nanoparticles (GNPs) has been proposed.

Simultaneous Electrochemical Detection of Multiple Heavy-Metal Ions Based on Furfural/Reduced Graphene Oxide Composites

2021 ◽  
Author(s):  
Xiaoyun Xu ◽  
Xiaoyi Lv ◽  
Fei Tan ◽  
Yanping Li ◽  
Chao Geng ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Metal Ions ◽  
Reduced Graphene Oxide ◽  
Heavy Metal Ions ◽  
Simultaneous Detection ◽  
Reduced Graphene ◽  
The Matrix ◽  
One Step ◽  
Oxide Composites

Abstract An efficient and sensitive electrochemical sensor for simultaneous detection of heavy metal ions was developed based on furfural/reduced graphene oxide composites (FF/RGO). The preparation of FF/RGO were performed through a one-step high-pressure assisted hydrothermal treatment, which is recommended as a green, convenient, and efficient way for the reduction of graphene oxide and the production of FF/RGO composites. RGO not only serves as the skeleton for furfural loading but also improves the conductivity of the composites in the matrix. FF/RGO with large specific surface area and abundant oxygen-containing functional groups was used to provide more binding sites for the effificient adsorption of heavy-metal ions due to the interaction between hydrophilic groups (-COOH, -OH, and -CHO) and metal cations. The developed sensor showed identifiable electrochemical response toward the heavy metal ions separately and simultaneously, exhibiting superior stability, outstanding sensitivity, selectivity and excellent analytical performance. Impressively, the sensor developed in this experiment has been successfully applied to the simultaneous determination of various heavy metal ions in actual samples, which has definitely exhibited a promising prospect in practical application.

Alcohol dehydration performance of pervaporation composite membranes with reduced graphene oxide and graphene quantum dots homostructured filler

Carbon ◽  
2020 ◽  
Vol 162 ◽  
pp. 318-327 ◽  
Author(s):  
Rumwald Leo G. Lecaros ◽  
Ma. Elizabeth Bismonte ◽  
Bonifacio T. Doma ◽  
Wei-Song Hung ◽  
Chien-Chieh Hu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Graphene Quantum Dots ◽  
Composite Membranes ◽  
Alcohol Dehydration ◽  
Reduced Graphene

scholarly journals Reduced graphene oxide–metal nanoparticle composite membranes for environmental separation and chloro-organic remediation

RSC Advances ◽  
2019 ◽  
Vol 9 (66) ◽  
pp. 38547-38557 ◽  
Author(s):  
Ashish Aher ◽  
Samuel Thompson ◽  
Trisha Nickerson ◽  
Lindell Ormsbee ◽  
Dibakar Bhattacharyya
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Organic Contaminants ◽  
Composite Membranes ◽  
Metal Nanoparticle ◽  
Separation Performance ◽  
Oxidation Reactions ◽  
Heterogeneous Oxidation ◽  
Reduced Graphene

This study explores the integration of separation performance was achieved in a loose nanofiltration regime with heterogeneous oxidation reactions for remediation of organic contaminants from water.

3D MnO2 nanotubes@reduced graphene oxide hydrogel as reusable adsorbent for the removal of heavy metal ions

2019 ◽  
Vol 231 ◽  
pp. 105-108 ◽  
Author(s):  
Tianqin Zeng ◽  
Yong Yu ◽  
Zefan Li ◽  
Jiangtao Zuo ◽  
Zeyuan Kuai ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Metal Ions ◽  
Reduced Graphene Oxide ◽  
Heavy Metal Ions ◽  
Reduced Graphene
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