scholarly journals Nickel tungstate–graphene nanocomposite for simultaneous electrochemical detection of heavy metal ions with application to complex aqueous media

RSC Advances ◽  
2017 ◽  
Vol 7 (67) ◽  
pp. 42146-42158 ◽  
Author(s):  
Rudra Kumar ◽  
Thiruvelu Bhuvana ◽  
Ashutosh Sharma
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Transition Metal ◽  
Metal Ions ◽  
Electrochemical Detection ◽  
Heavy Metal Ions ◽  
Aqueous Media ◽  
Reduced Graphene ◽  
Graphene Nanocomposite ◽  
First Time

We show for the first time, a composite of carbon and binary transition metal oxide, in the form of reduced graphene oxide and nickel tungstate (RGO/NiWO4) nanocomposite, is an effective material for electrochemical detection of heavy metal ions.

Graphene oxide-based electrochemical sensor: a platform for ultrasensitive detection of heavy metal ions

RSC Advances ◽  
2014 ◽  
Vol 4 (47) ◽  
pp. 24653-24657 ◽  
Author(s):  
Xuezhong Gong ◽  
Yunlong Bi ◽  
Yihua Zhao ◽  
Guozhen Liu ◽  
Wey Yang Teoh
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Metal Ions ◽  
Electrochemical Sensor ◽  
Electrochemical Detection ◽  
Heavy Metal Ions ◽  
Gold Surface ◽  
Ultrasensitive Detection ◽  
Control Electrode ◽  
Graphene Oxide Sheets

Facile functionalization of graphene oxide sheets on gold surface results in complexation-enhanced electrochemical detection of heavy metal ions, shown here for Pb2+, Cu2+ and Hg2+, with improved detection limits by two orders of magnitude relative to the control electrode.

A new functionalized reduced graphene oxide adsorbent for removing heavy metal ions in water via coordination and ion exchange

2018 ◽  
Vol 53 (18) ◽  
pp. 2896-2905 ◽  
Author(s):  
Chao-Zhi Zhang ◽  
Bin Chen ◽  
Yuan Bai ◽  
Jing Xie
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Ion Exchange ◽  
Metal Ions ◽  
Reduced Graphene Oxide ◽  
Heavy Metal Ions ◽  
Reduced Graphene

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.

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

Application of Graphene-Based Nanocomposites in Electrochemical Detection of Heavy Metal Ions

2020 ◽  
Vol 12 (3) ◽  
pp. 435-440 ◽  
Author(s):  
Xue Chen ◽  
Yongcun Pei
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Electrochemical Detection ◽  
Heavy Metal Ions ◽  
Electrochemical Sensors ◽  
Graphene Oxides ◽  
Experimental Conditions ◽  
Reduced Graphene ◽  
Reduced Graphene Oxides ◽  
Interference Tests

The purpose of this study was to explore the application of graphene-based nanocomposites in electrochemical detection of heavy metal ions. In this study, Graphene oxide (GO) was synthesized with improved Hummers method, and flower-like MoS2/rGO nanocomposite was synthesized with hydrothermal method and used as electrode modification material. In addition, scanning electron microscopy (SEM) and X-ray images were used to observe the characterization of the prepared samples and to detect the sensitivity of four heavy metal ions under optimal experimental conditions. The results showed that the reduced graphene oxides were coated with a large number of flower-like MoS2 and laid on the reduced graphene oxides. And in electrochemical experiments, adsorption experiments and interference tests, MoS2/rGO nanocomposites showed satisfactory performance for Pb(II). Therefore, this study provided a new strategy for the development of new nanocomposites composites as electrochemical sensors to detect the heavy metal ions in the aquatic environment.

Ternary hybrid of polyaniline-alanine-reduced graphene oxide for electrochemical sensing of heavy metal ions

2020 ◽  
Vol 265 ◽  
pp. 116410 ◽  
Author(s):  
Mehwish Akhtar ◽  
Amiza Tahir ◽  
Sonia Zulfiqar ◽  
Farzana Hanif ◽  
Muhammad Farooq Warsi ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Metal Ions ◽  
Reduced Graphene Oxide ◽  
Heavy Metal Ions ◽  
Electrochemical Sensing ◽  
Reduced Graphene

Simple and Robust Green Synthesis of Au NPs on Reduced Graphene Oxide for the Simultaneous Detection of Toxic Heavy Metal Ions and Bioremediation Using Bacterium as the Scavenger

2016 ◽  
Vol 28 (8) ◽  
pp. 1885-1893 ◽  
Author(s):  
Periyasami Gnanaprakasam ◽  
Soban Easow Jeena ◽  
Dhanaraj Premnath ◽  
Thangavelu Selvaraju
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Metal Ions ◽  
Green Synthesis ◽  
Reduced Graphene Oxide ◽  
Heavy Metal Ions ◽  
Simultaneous Detection ◽  
Toxic Heavy Metal ◽  
Au Nps ◽  
Reduced Graphene

scholarly journals A Ca2+ MOF combining highly efficient sorption and capability for voltammetric determination of heavy metal ions in aqueous media

2019 ◽  
Vol 7 (25) ◽  
pp. 15432-15443 ◽  
Author(s):  
Anastasia D. Pournara ◽  
Antigoni Margariti ◽  
Georgios D. Tarlas ◽  
Andreas Kourtelaris ◽  
Valeri Petkov ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Electrochemical Sensor ◽  
Heavy Metal Ions ◽  
Aqueous Media ◽  
Voltammetric Determination ◽  
Dual Function ◽  
Two Dimensional ◽  
First Time

The two-dimensional Ca-MOF shows a dual function as a sorbent and an electrochemical sensor for heavy metal ions, which is reported for the first time for a MOF material.

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