Co-electrodeposited rGO/MnO2 nanohybrid for arsenite detection in water by stripping voltammetry

Add time:08/12/2019    Source:sciencedirect.com

Herein, we report noble metal free, cathodically co-electroreduced rGO/MnO2 nanohybrid (NH) on glassy carbon electrodes for arsenite (As (III)) detection in water by square wave anodic stripping voltammetry (SWASV). Cyclic voltammetry, scaning electron microscopy, X-ray diffraction, trasnsmission electron microsocpy and Fourier transform infra-red (FT-IR) spectroscopy were used to probe the rGO/MnO2/GCE surface, revealing the formation of NHs. The arsenite sensing parameters such as deposition potential and time was optimized allowing a detection range of 0.1 ppb to 50 ppb in 0.1 M acetate buffer. This in-situ fabricated NHs electrodes exhibit favourable sensitivity of 0.175 μA/ppb with a theoritical limit of detection of 0.05 ppb for arsenite, which is well below the levels set by World Health Organization. Moreover, the fabricated electrode exhibited good selectivity, stability and reproducibility, in near alkaline condition without using any noble metal as sensing electrode component, desirable for practical application. These findings suggest the possibility of a cost effective electrochemical sensing electrode for a portable embedded system to determine As (III) in water.

We also recommend Trading Suppliers and Manufacturers of Copper acetate arsenite (cas 1299-88-3). Pls Click Website Link as below: cas 1299-88-3 suppliers

Prev:Arsenic trioxide encapsulated liposomes prepared via copper acetate gradient loading method and its antitumor efficiency
Next:NF-kB-regulated exosomal miR-155 promotes the inflammation associated with arsenite carcinogenesis)