Multiwalled Carbon Nanotubes/4,4′‐Dihydroxybiphenyl Nanolayered Composite for Voltammetric Detection of Phenol

Abstract

This paper reports the preparation of multiwalled carbon nanotubes/4,4′‐dihydroxybiphenyl (MWCNTs‐DHB) nanolayered composite as a new modifier for modification of carbon paste electrode (CPE/MWCNTs‐DHB). CPE/MWCNTs‐DHB shows linear responses for phenol in the concentrations range of 0.04–220 μM with a current sensitivity of 0.67 μA μM−1 and a detection limit of 8.0 nM (S/N=3). The electrode shows high selectivity, good repeatability (RSD=4.1 %), excellent reproducibility (RSD=3.5 %), and acceptable stability (91.2 % over one‐month storage). Moreover, the modified CPE exhibits appreciable recoveries (93.0–104.0 %) indicating its acceptable performance for determination of phenol in tap and river water samples.

Eco-friendly spectrophotometric methods for concurrent analysis of phenol, 2-aminophenol, and 4-aminophenol in ternary mixtures and water samples: assessment of environmental sustainability

“…Several analytical techniques have been developed for the determination and characterization of phenolic pollutants, such as HPLC/GC, HPLC/MS, capillary electrophoresis, [18][19][20][21][22][23][24] and electrochemical approaches. [25][26][27][28] UV-spectrophotometry stands out as one of the easiest and most convenient methods of analysis. However, a primary challenge in spectrophotometric multicomponent analysis is identifying the presence of multiple compounds in a mixture with overlapping spectra, without prior separation.…”

Development of a novel vinylene‐linked covalent organic framework decorated with multi‐walled carbon nanotubes for electrochemical detection of tryptophan, uric acid, and 8‐hydroxy‐2′‐deoxyguanosine

“…Electrochemical detection can be considered as an alternative approach for the detection of Trp, UA, and 8‐OHdG due to its advantageous characteristics, such as low cost, simple operation, and high sensitivity. Modified electrodes such as multi‐walled carbon nanotubes (MWCNTs) [ 8 ] and strontium phen‐dione complex [ 9 ] have been applied for the determination of Trp, UA, and 8‐OHdG.…”