کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6470955 1424110 2017 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A preparation of homogeneous distribution of palladium nanoparticle on poly (acrylic acid)-functionalized graphene oxide modified electrode for formalin oxidation
ترجمه فارسی عنوان
آماده سازی توزیع همگن از نانوذرات پالادیوم بر روی الکترودهای اصلاح شده اکسید گرافین پلی اتیلن اسید (اکریلیک اسید) برای اکسیداسیون فرمالین
کلمات کلیدی
نانوذرات پالادیوم، پلی (اسید اکریلیک)، گرافین اکسید، فعالیت الکتریکی کاتالیستی، فرمالین اکسیداسیون، جریان تزریق آمپر متر،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی

An excellent electrocatalytic activity, repeatability and stability of electrochemical sensor for formalin detection was fabricated based on a homogeneous distribution of ellipsoidal palladium nanoparticle (PdNPs) on poly (acrylic acid)-functionalized graphene oxide (PAA-GO) modified on a glassy carbon electrode (GCE) (PdNPs-PAA-GO/GCE) with incorporated flow injection amperometry (FI-Amp). Homogeneous distribution of ellipsoidal palladium nanoparticles (PdNPs) were dispersed on PAA-GO via an electroless deposition method. The surface morphology and electrochemical behavior of the PdNPs-PAA-GO/GCE were characterized by transmission electron microscopy, fourier transform infrared spectroscopy, cyclic voltammetry and amperometry. The PdNPs-PAA-GO/GCE exhibited excellent electrocatalytic activity toward formalin oxidation. Then this modified electrode was incorporated with FI-Amp for formalin sensor development. In order to obtain good analytical performances, many parameters such as the amount of PdNPs-PAA-GO, applied potential, flow rate and sample volume were optimized. Under optimal conditions, this sensor provided a wide linear range, 50-50,000 μmol L−1, with high sensitivity (320 μA mmol L−1 cm−2). The limit of detection and limit of quantitation were 16 μmol L−1 and 53 μmol L−1, respectively. This proposed sensor exhibited good repeatability (RSD < 3.5%), excellence stability (RSD = 1.5%, n = 500) and high sample throughput (60 samples h−1). This method was applied to the determination of formalin in soaked fresh food samples with satisfactory recovery.

140

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 247, 1 September 2017, Pages 229-240
نویسندگان
, , , ,