Selective Determination of Copper (II) Based on Aluminum Silicon Carbide Nanoparticles Modified Glassy Carbon Electrode by Square Wave Stripping Voltammetry

Abstract

The morphology and structure of as‐prepared aluminum silicon carbide (Al4SiC4) were characterized using X‐ray diffraction (XRD) patterns, scanning electron microscope (SEM), transmission electron microscopy (TEM) and UV‐vis spectra. The Al4SiC4 nanoparticles modified glassy carbon electrode (GCE) was further investigated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Based on this, this kind of new electrode was used for the detection of trace Cu2+ by square wave anodic stripping voltammetry (SWASV) for the first time. The electrochemical parameters influencing on deposition and stripping of metal ions, such as supporting electrolytes, pH value, deposition potential and deposition time, were also optimized. The results showed that the Al4SiC4 modified GCE exhibited excellent stripping response of Cu2+ and the stripping peaks response increased linearly with increasing concentration of Cu2+ in the ranges of 400 to 2200 nM. Under the optimized conditions the favorable sensitivity of the Al4SiC4 modified GCE toward trace Cu2+ was 1.49 μA μM−1 and the limit of detection (S/N=3) was estimated to be 2.76 nM. More importantly, Al4SiC4 modified GCE had an excellent stability and negligible interference from other coexisting metal ions in the electrochemical determination of Cu2+.

Fabrication of Screen-Printed Electrodes Modified by Hydrothermal MnO2 Microflowers and Carbon for Electrochemical Sensors in Copper Ions Detection

“…To date, various electrode active materials have been investigated for electrochemical sensors to detect copper (II). Te materials include novel metals (nanosilver and nanogold) [11,12], silica-based materials [13], carbon-based materials (graphite, carbon nanotube, graphene) [13][14][15][16][17], and metal oxides (Sb 2 O 3 , MnO 2 , SnO 2 , and Fe 3 O 4 ) [18][19][20][21]. Among them, manganese dioxide (MnO 2 ) has gained great attraction due to its merits such as cheap cost, simple synthesis, low toxicity, and environmental friendliness.…”

Voltammetric Determination of Serine Using L‐Cysteine Modified Platinum Electrode and Brief Exploration from the Theoretical Perspective

“…Electrochemical analysis has received much attention as an alternative to the above mentioned methods with the merits such as cheap instrument, fast response, simple operation and low cost . However, there are some difficulties in detecting amino acid because their electrical activity was internally embedded and can not be readily oxidized or reduced at conventional electrodes .…”