Electrocatalytic determination of free glycerol in biodiesel at nano nickel modified graphite electrode
محل انتشار: مجله بین المللی ابعاد نانو، دوره: 3، شماره: 3
سال انتشار: 1392
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 114
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شناسه ملی سند علمی:
JR_IJND-3-3_010
تاریخ نمایه سازی: 24 تیر 1401
چکیده مقاله:
For the first time this study reported the success of using nanocrystalline hexagonal close-packed (hcp) nickel (Ni) modified composite graphite (CG) electrode (hcp-nano Ni/CG) for the electrocatalytic oxidation of glycerol in alkaline medium (۰.۱ M KOH). The hcp-nano Ni/CG electrode had an improve response and specificity on the electrocatalytic oxidation of glycerol over the bare CG. The electrocatalysis was the result of the formation of NiOOH during the oxidation process. The process was influenced by scan rate and concentration of glycerol. A linear relationship of concentration with current was obtained over concentration range of ۰.۵ – ۱۲.۰ mM glycerol with limit of detection (S/N = ۳) at ۰.۰۳۳ mM glycerol. The hcp nano Ni modified CG electrode was applied for direct determination of free glycerol in biodiesel samples. As a glycerol sensor the hcp nano Ni modified CG is quite stable.
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نویسندگان
R. M. A. Tehrani
Department of Chemistry, Shahre Rey Branch, Islamic Azad University, ۱۸۱۵۵-۱۴۴, Tehran, Iran.
M.R. Allahgholi Ghasri
Department of Chemistry, Shahre Rey Branch, Islamic Azad University, ۱۸۱۵۵-۱۴۴, Tehran, Iran.
F. Bakhtiarzadeh
Department of Chemistry, Shahre Rey Branch, Islamic Azad University, ۱۸۱۵۵-۱۴۴, Tehran, Iran.
N. Tafreshi
Department of Chemistry, Shahre Rey Branch, Islamic Azad University, ۱۸۱۵۵-۱۴۴, Tehran, Iran.
S. Ab Ghani
Pusat Pengajian Sains Kimia, Universiti Sains Malaysia, ۱۱۸۰۰ USM, Pulau Pinang, Malaysia.