مروری بر تاثیر جایگزینی کاتیون ها بر خواص اسپینل های ترکیبی بر پایه ی کبالت، روی و منیزیم

نوع مقاله: مقاله پژوهشی

نویسندگان

گروه مهندسی شیمی، دانشکده مهندسی شیمی، دانشگاه صنعتی ارومیه، ارومیه، ایران

چکیده

امروزه استفاده از نانوذرات CoAl2O4 و، MgAl2O4 و ZnAl2O4 به عنوان پرکاربردترین
ساختارهای اسپینلی در صنعت کاتالیست، پایه ی کاتالیست و رنگدانه ی معدنی رایج شده است.
مطالعات انجام گرفته نشان می دهد که استفاده ی جداگانه از اسپینل ها کارایی لازم را نداشته
و در سال های اخیر استفاده ی ترکیبی و همزمان از آن ها مورد توجه قرارگرفته است. در
تحقیق حاضر، ضمن بررسی خصوصیات و دلایل عدم کارایی مناسب نانوذرات مذکور، تاثیر
جایگزینی کاتیون های M = Zn, Mg, Mn, Ba, Sr در ساختار CoxM1-xAl2O4 به عنوان
یکی از روش های نوین بهبود عملکرد اسپینل ها مطالعه شده است. نتایج حاصل، نشان می دهد که
استفاده از کاتیون های مذکور به طور قابل توجهی موجب بهبود خواص کامپوزیت شده است که از
جمله ی آن می توان به کنترل پدیده ی تبادل یون بین دو جایگاه تتراهدرال و اکتاهدرال کبالت
آلومینات، کاهش هزینه ی تولید و سمیت این ماده با جایگزینی Zn اشاره نمود.

کلیدواژه‌ها

موضوعات


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