Iranian Research Organization for Science and Technology Advances in Environmental Technology 2476-6674 4 1 2018 01 01 Cu decorated multiwalled carbon nanotubes: Application to electrocatalytic oxidation and determination of 4-nitrophenol in river water samples by square-wave voltammetry 51 60 664 10.22104/aet.2018.2441.1122 EN Fahimmeh Jalali Department of Chemistry, Razi University, Kermanshah, Iran Ali Taher AbdAli Depatment of Chemistry, Razi University, Kermanshah, Iran Zahra Hasanvand Departmen of Chemistry, Razi University, Kermanshah, Iran Journal Article 2017 09 04 A simple and fast electrochemical method was described and evaluated for the determination of hazardous compound, 4-nitrophenol. In this work, trace amounts of 4- nitrophenol were determined by square – wave voltammetry. A glassy carbon electrode was modified with multi-walled carbon nanotubes and copper nanoparticles. A synergistic effect was observed between Cu nanoparticles and carbon nanotubes which resulted in enhanced oxidation peak current of 4-nitrophenol. The modified electrode showed more sensitivity towards 4-nitrophenol compared to unmodified one. A wide linear concentration range from 0.2 to 298.0 μM was obtained for 4-nitrophenol with a detection limit of 0.06 μM. Reproducibility and repeatability of the method were evaluated for determination of 4-nitrophenol (0.1 mM) as 3.47% and 2.30%, respectively (relative standard deviation, RSD %), which are acceptable. The method was applied to the analysis of 4- nitrophenol (22.2 μM) in spiked river water samples, successfully. Simplicity, sensitivity, selectivity and high efficiency of the proposed method can be used in routine analysis of trace amounts of 4-nitrophenol in polluted waters. https://aet.irost.ir/article_664_835e247a1c7e66d0913f0c34db5cf7d0.pdf