Development of a printed paper-based origami electrochemical sensor for the detection of heavy metals in water

2019 ◽  
Author(s):  
Phophi Madzivhandila ◽  
Suzanne Smith ◽  
Letta Ntuli ◽  
Kevin Land
Keyword(s):  
Heavy Metals ◽  
Electrochemical Sensor

scholarly journals MnO2@Reduced Graphene Oxide Nanocomposite-Based Electrochemical Sensor for the Simultaneous Determination of Trace Cd(II), Zn(II) and Cu(II) in Water Samples

Membranes ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 517
Author(s):  
Siyamthanda Hope Mnyipika ◽  
Tshimangadzo Saddam Munonde ◽  
Philiswa Nosizo Nomngongo
Keyword(s):  
Heavy Metals ◽  
Electrochemical Sensor ◽  
Simultaneous Determination ◽  
Rapid Detection ◽  
Electrochemical Sensors ◽  
Simultaneous Detection ◽  
Cyclic Voltammograms ◽  
Current Response ◽  
Mno2 Nanoparticles

The rapid detection of trace metals is one of the most important aspect in achieving environmental monitoring and protection. Electrochemical sensors remain a key solution for rapid detection of heavy metals in environmental water matrices. This paper reports the fabrication of an electrochemical sensor obtained by the simultaneous electrodeposition of MnO2 nanoparticles and RGO nanosheets on the surface of a glassy carbon electrode. The successful electrodeposition was confirmed by the enhanced current response on the cyclic voltammograms. The XRD, HR-SEM/EDX, TEM, FTIR, and BET characterization confirmed the successful synthesis of MnO2 nanoparticles, RGO nanosheets, and MnO2@RGO nanocomposite. The electrochemical studies results revealed that MnO2@RGO@GCE nanocomposite considerably improved the current response on the detection of Zn(II), Cd(II) and Cu(II) ions in surface water. These remarkable improvements were due to the interaction between MnO2 nanomaterials and RGO nanosheets. Moreover, the modified sensor electrode portrayed high sensitivity, reproducibility, and stability on the simultaneous determination of Zn(II), Cd(II), and Cu(II) ions. The detection limits of (S/N = 3) ranged from 0.002–0.015 μg L−1 for the simultaneous detection of Zn(II), Cd(II), and Cu(II) ions. The results show that MnO2@RGO nanocomposite can be successfully used for the early detection of heavy metals with higher sensitivity in water sample analysis.

Detection of heavy metals using fully printed three electrode electrochemical sensor

2014 ◽  
Author(s):  
Sai Guruva Reddy Avuthu ◽  
Binu Baby Narakathu ◽  
Ali Eshkeiti ◽  
Sepehr Emamian ◽  
Bradley J. Bazuin ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Electrochemical Sensor

scholarly journals A simple electrochemical sensor based on rGO/MoS2/CS modified GCE for highly sensitive detection of Pb(ii) in tobacco leaves

RSC Advances ◽  
2021 ◽  
Vol 11 (47) ◽  
pp. 29590-29597
Author(s):  
Chuanen Guo ◽  
Chengxiang Wang ◽  
Hongyan Sun ◽  
Dongmei Dai ◽  
Hongtao Gao
Keyword(s):  
Heavy Metals ◽  
Electrochemical Sensor ◽  
Crucial Role ◽  
High Performance ◽  
Electrochemical Determination ◽  
Tobacco Leaves ◽  
Highly Sensitive ◽  
Highly Sensitive Detection ◽  
Sensor Detection

High-performance electrode modification materials play a crucial role in improving the sensitivity of sensor detection in electrochemical determination of heavy metals.

Disposable electrochemical sensor for rapid determination of heavy metals in herbal drugs

2003 ◽  
Vol 32 (2) ◽  
pp. 251-256 ◽  
Author(s):  
I. Palchetti ◽  
M. Mascini ◽  
M. Minunni ◽  
A.R. Bilia ◽  
F.F. Vincieri
Keyword(s):  
Heavy Metals ◽  
Electrochemical Sensor ◽  
Rapid Determination ◽  
Herbal Drugs
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