تاثیر pH الکترولیت بر مغناطش نانوکامپوزیت گرافن- کبالت سنتز شده به روش رسوب‌دهی الکتروشیمیایی

نویسندگان

دانشکده فیزیک-شیمی، دانشگاه الزهرا، تهران، ایران.

10.30501/jamt.2019.99511

چکیده

نانوکامپوزیت‌های مغناطیسی گرافن به علت قابلیت کنترل با میدان مغناطیسی خارجی و رسانندگی الکتریکی بالا در فناوری‌ جدید کاربرد‌های فراوانی دارند. روش رسوب­دهی الکتروشیمیایی برای تولید نانوکامپوزیت‌های گرافن- فلز به علت سادگی، تک­مرحله بودن و مقرون به­صرفه بودن روش بسیار مناسبی می‌باشد. در این مقاله، تاثیر pH الکترولیت بر مغناطش نانوکامپوزیت گرافن- کبالت به روش رسوب‌دهی الکتروشیمیایی، بررسی می‌شود. نمونه‌های تولید شده در محیط‌های بازی و خنثی، غیر­مغناطیسی و نمونه‌های تولید شده در محیط‌های اسیدی، مغناطیسی می‌باشند. در محیط اسیدی با 5= pH، نانوکامپوزیت گرافن- کبالت با بیش‌ترین میزان جرم با مغناطش بالا تولید شده است. نمونه‌ مغناطیسی 5= pH، با آنالیز فازی با الگوی پراش پرتو ایکس (XRD)، پراش انرژی پرتو ایکس (EDX)، طیف­سنجی مادون قرمز(FTIR) و خاصیت مغناطیسی با بررسی منحنی پسماند حاصل از VSM مشخصه­یابی شده است. برای بررسی مورفولوژی این نانوکامپوزیت­ها، از میکروسکوپ الکترونی (MSE) استفاده شده ­است. کامپوزیت تولید شده متشکل از پوسته‌های گرافن و بلور‌های کبالت با مغناطش اشباع بالا در حدود 119 emu/g می‌باشد که قابلیت کاربرد در دارورسانی هدفمند، پاک­کنندگی آب، حسگرهای زیستی و مغناطیسی را دارد.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of Solution pH on Magnetization of Graphene-Cobalt Nanocomposite Synthesized by Electrochemical Deposition Technique

نویسندگان [English]

  • Seyedeh Fatemeh t Aghaie Doost
  • Narges Ansari
Department of Physics-chemistry, Alzahra University, Tehran, Iran.
چکیده [English]

magnetic graphene nanocomposites are suggested for application in modern technology because of their controllability via external magnetic field and their electrical conductivity. Electrochemical deposition method has found great advantageous to manufacture graphene/metal nanocomposite because of being simple, one –step and cost-effective method. In this research, the effect of electrolyte pH on magnetic response of graphene/cobalt nanocomposite synthesized by electrochemical deposition technique is studied. Synthesized samples in neutral and basic environment are nonmagnetic. Whereas, synthesized samples in acidic solutions are magnetic. In an acidic environment with pH=5, graphene-cobalt nanocomposites are produced with high output mass of synthesized materials and high magnetization. Optimum magnetic sample produced with pH=5 is characterized via X-ray diffraction (XRD), energy-dispersive X-ray (EDX) spectroscopy, Fourier transform infrared spectroscopy (FTIR) and magnetic properties is determined with vibration sample magnetometer (VSM). Morphology of samples is probed by electron microscopy (SEM). The composite consists of graphene sheets and cobalt crystals with a high saturation magnetization of about 119 emu/g which has a potential for application in targeted drug delivery, water remediation, magnetic bio sensors, etc.
 

کلیدواژه‌ها [English]

  • Magnetic Graphene
  • Cobalt
  • Nanocomposite
  • Electrochemical deposition
  • Effect of pH
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