کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11001520 460076 2018 35 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sensitive determination of fenitrothion in water samples based on an electrochemical sensor layered reduced graphene oxide, molybdenum sulfide (MoS2)-Au and zirconia films
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Sensitive determination of fenitrothion in water samples based on an electrochemical sensor layered reduced graphene oxide, molybdenum sulfide (MoS2)-Au and zirconia films
چکیده انگلیسی
An efficient, highly sensitive and selective electrochemical sensor was developed for determination of fenitrothion in tap water, cropland water and canal water samples. The synthesized reduced graphene oxide (RGO) and molybdenum sulfide (MoS2)-Au were introduced using their synergetic enhancement effect to improve the sensor sensitivity. Zirconia (ZrO2) nanoparticles were electro-deposited onto modified gold electrode to selectively adsorb fenitrothion, which can be further captured by cyclic voltammetry or square wave voltammetry on the basis of its redox behavior of nitrobenzene group. The immobilization process was characterized by electrochemical impedance spectroscopy, illustrating the enhancement of RGO/MoS2-Au composite and the successful electro-deposition of ZrO2. Systematical method validation was performed including linearity, sensitivity, selectivity, reproducibility, regeneration and stability. The current is linearly correlated with the fenitrothion concentration from 5.0 to 600 ng mL−1 with the limit of detection of 2.2 ng mL−1. The developed electrochemical sensor displayed satisfactory performance in real water samples analysis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 292, 1 December 2018, Pages 667-675
نویسندگان
, , , , , , , , ,