سنتز، شناسایی و بررسی ویژگی مغناطیسی نانوکامپوزیت Co3O4/CoFe2O4 با استفاده از کلسینه‌کردن نمک کمپلکس‌های دوتایی Co(Salen)(PPh3)(H2O) 4Fe(CN)6 و Co(Salophen)(PPh3)(H2O) 4Fe(CN)6

نویسندگان

دانشکده شیمی، دانشگاه صنعتی اصفهان.

چکیده

در این پژوهش سنتز کمپلکس‌های باز شیف [Co(Salen)(PPh3)}4{Fe(CN)6}}] و [Co(Salophen)(PPh3)}4{Fe(CN)6}}] گزارش شده است. آنگاه نانوذره‌های مغناطیسی CoFe2O4/Co3O4 از کلسینه‌کردن این کمپلکس‌ها در دماهای 500، 550 و 600 درجه سانتی‌گراد به‌دست آمدند. کمپلکس‌ها توسط طیف‌سنجی مادون قرمز تبدیل فوریه (FT-IR) و طیف‌سنجی مرئی- فرابنفش (UV-Vis) شناسایی شدند. نمونه‌ها با پراش پرتو ایکس (XRD) ، میکروسکوپ الکترونی روبشی (SEM)  و طیف‌سنجی مادون قرمز با تبدیل فوریه (FT-IR) مشخص شدند. رفتار مغناطیسی این نانو‌ذره‌ها به‌وسیله دستگاه مغناطیس‌سنج نمونه مرتعش، مطالعه و بررسی شد. پارامترهای مغناطیسی مانند مغناطش اشباع، پسماند مغناطیسی، میدان بازدارنده و نسبت مربعی پسماند در دمای اتاق اندازه‌گیری شدند. استوکیومتری و ترکیب نسبی نمونه تهیه شده با استفاده از طیف‌سنجی توزیع انرژی پرتو ایکس (EDX) بررسی شد. نانو‌کامپوزیت‌های آماده شده ویژگی‌هایی مانند آهنربایی بالا، پایداری شیمیایی خوب و پراکندگی را نشان می‌دهد که در برخی از کاربردهای عملی مفید است.

 

کلیدواژه‌ها

عنوان مقاله [English]

Synthesis, Characterization and Investigation of Magnetic Properties of Co3O4/CoFe2O4 Nanocomposite Prepared by Calcination of [CO(SALEN)(PPH3)(H2O)]4[Fe(CN)6] and [Co(Salophen)(PPH3)(H2O)]4[Fe(CN)6] Binary Complex Salts

نویسندگان [English]

  • A. H. Kianfar
  • N. Eskandari
  • M. A. Arayesh
Department of Chemistry, Isfahan University of Technology, Isfahan, 84156/83111, Iran.
چکیده [English]

In this research the synthesis of [Co(Salen)(PPh3)(H2O)]4[Fe(CN)6] and [Co(Salophen)(PPh3)(H2O)]4[Fe(CN)6] schiff base complexes was reported. Co3O4/CoFe2O4 magnetic nanoparticles were prepared by calcination of these complexes at 500, 550 and 600°C. Precursor complexes were identified by FT-IR and UV-Vis spectroscopy and their thermal behavior was studied via TG/DTA. Nanomagnetic samples were characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), and Fourier Transform Infrared Spectroscopy (FT-IR). Magnetic properties of the synthesized nanoparticles were studied using Vibrating Sample Magnetometer (VSM). Magnetic parameters such as saturation magnetization (Ms), remanent magnetization (Mr), coercive field (Hc) and squareness ratio (SQ = Mr/Ms) were determined at room temperature. Stoichiometry and approximate composition of the prepared samples were studied by Electron Diffraction X-ray spectroscopy (EDX). The prepared nanocomposites could be useful in some practical applications due to their high magnetization, good chemical stability and dispersion.

کلیدواژه‌ها [English]

  • Cobalt schiff base complexes
  • magnetic nanoparticles
  • remanent magnetization

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مواد پیشرفته در مهندسی
دوره 39، شماره 2
شهریور 1399
صفحه 81-101

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