تأثیر تلفیق میدان‌ مغناطیسی و پاشش الکتریکی بر جهت‌گیری نانولوله‌های‌کربنی در ذرات جاذب کامپوزیتی هسته-پوسته آلژینات و جذب متیلن‌بلو

نوع مقاله : مقاله پژوهشی

نویسندگان

1 نانوفناوری، دانشکده مهندسی شهید نیکبخت، دانشگاه سیستان و بلوچستان، زاهدان

2 1- مهندسی شیمی، دانشکده مهندسی شهید نیکبخت، دانشگاه سیستان و بلوچستان، زاهدان 2- مرکز نوآوری فناوری غشایی (ICMT)، دانشگاه سیستان و بلوچستان، زاهدان

3 مهندسی مواد، دانشکده مهندسی شهید نیکبخت، دانشگاه سیستان و بلوچستان، زاهدان

4 1- مرکز نوآوری فناوری غشایی (ICMT)، دانشگاه سیستان و بلوچستان، زاهدان 2- مهندسی شیمی، گروه مهندسی شیمی، دانشکده مهندسی، دانشگاه اردکان، اردکان

چکیده

در تحقیق حاضر، اثرات میدان‌ مغناطیسی و پاشش الکتریکی بر جهت‌گیری نانولوله‌های‌کربنی پایدارشده با عامل‌ سطحی کربوکسیل در زمینه جاذب آلژینات-نانولوله‌های‌کربنی و هچنین بر جذب متیلن‌بلو مورد بررسی قرار گرفت. ویژگی‌های جاذب و عملکرد آن‌ها با استفاده از میکروسکوپ الکترونی روبشی نشر میدانی و طیف‌سنج مرئی- فرابنفش بررسی شدند. تصاویر میکروسکوپی نشان داد که به واسطه دو ساعت قرارگرفتن کلوئید آلژینات-نانولوله‌های کربنی در میدان مغناطیسی، با متوسط قدرت 318 میلی‌تسلا، نانولوله‌ها به‌طور قابل توجهی در زمینه پلیمری جهت‌گیری پیدا کردند. این در حالی است که پاشش قطرات کلوئیدی تحت میدان الکتریکی تأثیر ناچیزی در همراستا‌سازی آن‌ها داشته و اساساً منجر به ریزسازی قطرات و افزایش نسبت سطح به حجم ذرات شده است. با تلفیق میدان‌های مغناطیسی و الکتریکی در حضور نانولوله‌ها، به میزان 92/2 درصد جذب متیلن‌بلو، در مقایسه با حالت صرفا پاشش الکتریکی (71 درصد) و صرفاً پاشش الکتریکی بدون حضور نانولوله‌ها (59 درصد) به‌دست آمد. این تحقیق نشان داد که جهت‌گیری نانولوله‌های کربنی تحت میدان‌های مغناطیسی و الکتریکی در افزایش راندمان جذب آلاینده‌های زیست محیطی مؤثر بوده و می‌تواند منجر به تولید جاذب‌های اقتصادی‌تر شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of Magnetic Field and Electrospray Combination on the Orientation of Carbon Nanotubes in Alginate Core-Shell Composite Adsorbent and Methylene Blue Adsorption

نویسندگان [English]

  • Y. Moayedfard 1
  • A.R. Samimi 2
  • H. Khosravi 3
  • R. Beigmoradi 4
1 Department of Nanotechnology, University of Sistan and Baluchestan, Zahedan, Iran
2 1- Department of Chemical Engineering, University of Sistan and Baluchestan, Zahedan, Iran 2- Innovation Center of Membrane Technology (ICMT), University of Sistan and Baluchestan, Zahedan, Iran
3 Department of Materials Engineering, University of Sistan and Baluchestan, Zahedan, Iran
4 1- Innovation Center of Membrane Technology (ICMT), University of Sistan and Baluchestan, Zahedan, Iran 2- Department of Chemical Engineering, University of Ardakan, Ardakan, Iran
چکیده [English]

In the present study, the effect of magnetic field and electrospray on the orientation of carbon nanotubes (CNT), stabilized with COOH, in the obtained alginate/CNT adsorbent’s matrix, as well as the adsorption of methylene blue, were investigated. FE-SEM and UV-visible spectroscopy were used to determine the characteristics and performance of absorbents. The images showed that the CNTs were significantly oriented in the polymer matrix by placing alginate-CNTs colloid in a magnetic field with an average strength of 318 mT for 2 h. While the spraying of colloidal droplets under the electric field had a negligible effect on the alignment of CNTs, it led to the size reduction of the droplets and an increase in the specific surface area of particles. By combining magnetic and electric fields in the presence of CNT, 92.2% of the methylene blue adsorption was obtained, which was higher than electrospray only (71%), and electrospray only without CNTs (59%). This research revealed that the orientation of carbon nanotubes under magnetic and electric fields was effective in increasing the adsorption efficiency of environmental pollutants and can lead to the production of more economical adsorbents.

کلیدواژه‌ها [English]

  • Alginate
  • Carbon nanotubes
  • Methylene blue
  • Orientation of carbon nanotubes
  • Surface adsorption

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مواد پیشرفته در مهندسی
دوره 42، شماره 1
خرداد 1402
صفحه 17-32

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