کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6466546 1422965 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical sensing and remediation of 4-nitrophenol using bio-synthesized copper oxide nanoparticles
ترجمه فارسی عنوان
سنجش الکتروشیمیایی و اصلاح 4 نیترو فنول با استفاده از نانوذرات اکسید مس سنتز شده زیستی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


- Biosynthesis of copper oxide (CuO) nanoparticles their characterization.
- Functionalization of screen printed electrodes (SPE) using CuO nanoparticles.
- Detection of 4-nitro phenol (4-NP) using functionalized SPE.
- Used impedance spectroscopy and square wave voltammetry for detection.
- The linear detection range was from 10 nM to 10 mM of 4-NP.

The present work reports impedance based electrochemical sensing and remediation of 4-nitro phenol (4-NP) using biosynthesized (CuO) copper oxide nanoparticles. The synthesis of CuO nanoparticles is achieved using fruit extract of plant Fortunella japonica as reducing and stabilizing agent. The CuO nanoparticles were characterized using various analytical techniques like UV-Visible spectroscopy, Atomic force microscopy (AFM), High resolution transmission electron microscopy (HR-TEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and X-ray diffraction (XRD). For electrochemical sensing of 4-NP, the CuO nanoparticles were drop casted on screen printed electrode (SPE) and electrode is referred at SPE/CuONPs sensor. The mechanism of 4-NP redox reactions was examined using cyclic voltammetry (CV). The electrochemical sensing of 4-NP has been done using square wave voltammetry (SWV) and impedance spectroscopy. In SWV, the oxidation peak current increased with increase in the concentration of 4-NP from 10 nM to 10 mM having regression coefficient of 0.996. In impedometric sensing, change in charge transfer resistance (Rct) with change in 4-NP concentration was used as a signal. The Rct decreased with increase in 4-NP concentration which is in accordance with SWV results. The effect of solution pH on impedometric response of SPE/CuONPs sensor was also evaluated. The SPE/CuONPs sensor exhibited good reproducibility and selectivity towards the analyte and is able to perform real sample analysis. The CuO nanoparticles act as a catalyst and showed good degradation percentage of 4-NP pollutant.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 313, 1 April 2017, Pages 283-292
نویسندگان
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