High performance of electrochemical sensors based on LbL films of gold nanoparticles, polyaniline and sodium montmorillonite clay mineral for simultaneous detection of metal ions

Abstract: Heavy metal ions have great hazard to human beings. The development of low-cost, mass-produced electrochemical sensors based on screen-printing technology has attracted considerable attention in recent years. In this paper we fabricated the Screen-printed carbon electrodes(SPCE) and realized the simultaneous detection of heavy metal ions(Cu,Pb,Zn) complied with the use of differential pulse anodic stripping voltammeter(DPASV) and optimized the detection conditions. The electrodes had satisfying sensitivity and precision, the detectable concentration reached ppb level

Download Full-text

Simultaneous detection of 8 monoamine neurotransmitters in the different sections of mouse brains by high performance liquid chromatography with fluorescence detection

Chinese Journal of Chromatography ◽

10.3724/sp.j.1123.2011.00146 ◽

2011 ◽

Vol 29 (2) ◽

pp. 146-151 ◽

Cited By ~ 9

Author(s):

Yanyan ZHAO ◽

Liyan LIU ◽

Yuanyuan HAN ◽

Jie BAI ◽

Guangling DU ◽

...

Keyword(s):

High Performance Liquid Chromatography ◽

Liquid Chromatography ◽

Fluorescence Detection ◽

High Performance ◽

Simultaneous Detection ◽

Monoamine Neurotransmitters

Download Full-text

Novel nanoscale Yb-MOF used as highly efficient electrode for simultaneous detection of heavy metal ions

Journal of Materials Science ◽

10.1007/s10853-021-05815-3 ◽

2021 ◽

Vol 56 (13) ◽

pp. 8172-8185

Author(s):

Manh B. Nguyen ◽

Dau Thi Ngoc Nga ◽

Vu Thi Thu ◽

Benoît Piro ◽

Thuan Nguyen Pham Truong ◽

...

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Heavy Metal Ions ◽

Simultaneous Detection ◽

Highly Efficient

Download Full-text

Zn/Fe nanocomposite based efficient electrochemical sensor for the simultaneous detection of metal ions

Physica E Low-dimensional Systems and Nanostructures ◽

10.1016/j.physe.2021.114671 ◽

2021 ◽

Vol 130 ◽

pp. 114671

Author(s):

Esraa M. Bakhsh ◽

Sher Bahadar Khan ◽

Abdullah M. Asiri ◽

Afzal Shah

Keyword(s):

Metal Ions ◽

Electrochemical Sensor ◽

Simultaneous Detection

Download Full-text

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 ◽

10.3390/membranes11070517 ◽

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.

Download Full-text

Carbon nanomaterial hybrids via laser writing for high-performance non-enzymatic electrochemical sensors: a critical review

Analytical and Bioanalytical Chemistry ◽

10.1007/s00216-021-03382-9 ◽

2021 ◽

Author(s):

Marcel Simsek ◽

Nongnoot Wongkaew

Keyword(s):

Noble Metal ◽

Critical Review ◽

High Performance ◽

Carbon Nanomaterials ◽

Electrochemical Sensors ◽

Low Cost ◽

Three Dimensional ◽

Laser Writing ◽

Enzyme Mimicking ◽

Natural Enzyme

AbstractNon-enzymatic electrochemical sensors possess superior stability and affordability in comparison to natural enzyme-based counterparts. A large variety of nanomaterials have been introduced as enzyme mimicking with appreciable sensitivity and detection limit for various analytes of which glucose and H2O2 have been mostly investigated. The nanomaterials made from noble metal, non-noble metal, and metal composites, as well as carbon and their derivatives in various architectures, have been extensively proposed over the past years. Three-dimensional (3D) transducers especially realized from the hybrids of carbon nanomaterials either with metal-based nanocatalysts or heteroatom dopants are favorable owing to low cost, good electrical conductivity, and stability. In this critical review, we evaluate the current strategies to create such nanomaterials to serve as non-enzymatic transducers. Laser writing has emerged as a powerful tool for the next generation of devices owing to their low cost and resultant remarkable performance that are highly attractive to non-enzymatic transducers. So far, only few works have been reported, but in the coming years, more and more research on this topic is foreseeable. Graphical abstract

Download Full-text