Solvothermal-Assisted, Reduced-Graphene-Oxide-Modified Bismuth Electrode for an Electrochemical Heavy-Metal-Ion Sensor

2016 ◽  
Vol 16 (11) ◽  
pp. 11421-11424 ◽  
Author(s):  
Xing Xuan ◽  
M. D. Faruk Hossain ◽  
Jae Yeong Park
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Metal Ion ◽  
Heavy Metal Ion ◽  
Ion Sensor ◽  
Reduced Graphene

Fabrication & Characterization of Simple Structure Self-Assembled Graphene Oxide Based Heavy Metal Ion Sensor

2019 ◽  
pp. 1-10
Author(s):  
Khi Khim Beh ◽  
Asrulnizam Abd Manaf ◽  
Khi Poay Beh ◽  
Fong Kwong Yam ◽  
Hwee San Lim ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Metal Ion ◽  
Simple Structure ◽  
Heavy Metal Ion ◽  
Ion Sensor ◽  
Self Assembled

scholarly journals Self-Supported Reduced Graphene Oxide Membrane and Its Cu2+ Adsorption Capability

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 146
Author(s):  
Yangjinghua Yu ◽  
Zhong Wang ◽  
Runjun Sun ◽  
Zhihua Chen ◽  
Meicheng Liu ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Metal Ion ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Ion Concentration ◽  
Order Kinetic ◽  
Supported Membrane ◽  
Reduced Graphene

Graphene stratiform membrane materials have been recently applied to heavy metal removal in aqueous systems via adsorption due to their high mechanical strength, chemical stability, and other properties. We applied reduced graphene oxide (rGO) alone as an adsorbent to remove heavy metal ions from wastewater. Self-supported rGO membrane was prepared using a green reduction method with sodium hydrosulfite. We used the Raman spectra to observe the structure of the rGO membrane. The morphology of the self-supported membrane was measured by a scanning electron microscope. The Cu2+ adsorption performance was measured in terms of pH, reaction time, metal ion concentration, and temperature. The maximum Cu2+ adsorption capacity of the rGO membrane was found to be 149.25 mg/g. The adsorption process followed a pseudo-second-order kinetic model, and adsorption isotherms were simulated by the Freundlich model.

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.

scholarly journals Facile synthesis of MoS2/reduced graphene oxide composites for efficient removal of Cr(vi) from aqueous solutions

RSC Advances ◽  
2017 ◽  
Vol 7 (39) ◽  
pp. 24149-24156 ◽  
Author(s):  
Xiaolu Jiang ◽  
Hanjin Luo ◽  
Yuwei Yin ◽  
Weijia Zhou
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Aqueous Solutions ◽  
Reduced Graphene Oxide ◽  
High Toxicity ◽  
Efficient Removal ◽  
Facile Synthesis ◽  
Reduced Graphene ◽  
Metal Contaminate ◽  
Oxide Composites

Cr(vi) as a common heavy metal contaminate has attracted much attention for its high toxicity and bioaccumulation.

Microfabricated heavy metal ion sensor

1995 ◽  
Vol 23 (1) ◽  
pp. 41-47 ◽  
Author(s):  
Gregory T.A. Kovacs ◽  
Christopher W. Storment ◽  
Samuel P. Kounaves
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Heavy Metal Ion ◽  
Ion Sensor
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