نانوچندسازه منیزیم فریت/گرافن اکسید کاهیده و کاربرد فتوکاتالیستی آن در تخریب آلاینده و تولید سوخت

الموضوعات :

مجید غنیمتی ¹ (پژوهشگر پسادکتری دانشکده شیمی، دانشگاه تحصیلات تکمیلی علوم پایه زنجان، ایران)
محسن لشگری ² (دانشیار گروه شیمی فیزیک، دانشکده شیمی، دانشگاه تحصیلات تکمیلی علوم پایه زنجان، ایران)
واسیلیوس بیناس ³ (پژوهشگرموسسه ساختار الکترونیکی و لیزر هراکلیون، بنیاد تحقیقات و فناوری–هلاس، یونان)

تاريخ الإرسال : 20 الأربعاء , شوال, 1444 تاريخ التأكيد : 02 الخميس , محرم, 1445 تاريخ الإصدار : 07 الأربعاء , صفر, 1445

الکلمات المفتاحية: تولید هیدروژن, هیدروژن سولفید, تخریب فتوکاتالیستی آلاینده‌ها, نانوچندسازه نیم‌‌رسانا, منیزیم فریت, گرافن اکسید کاهیده, حذف رنگ متیل اورانژ,

ملخص المقالة :

تهیه مواد نانوچندسازه کارآمد با استفاده از عناصر فراوان زمین و ترکیب های دوستدار محیط زیست و کاربرد آن ها با هدف تخریب نور کاتالیستی مواد خطرناک و تولید سوخت، یک راهبرد پایدار برای حذف آلاینده و تامین هیدروژن به عنوان سوخت سبز (فاقد کربن) در دنیای مدرن است. در این پژوهش، نیم رسانای نانوساختار منیزیم فریت (MgFe2O4) سنتز و برای تولید گاز هیدروژن از راه شکافت نوری محلول قلیایی سیر شده از H2S و تخریب فتوکاتالیستی آلاینده مقاوم رنگ آزو (متیل اورانژ) استفاده شد. بررسی ها مشخص کرد فتوکاتالیست سنتزی، از توانایی لازم برای تخریب آلاینده و تولید هیدروژن برخوردار است. برای بهبود فعالیت فتوکاتالیست، پیش ساز گرافن اکسید به روش هامرز اصلاح شده تهیه و از آن به شکل مستقیم در سنتز آب گرمایی نانوچندسازه منیزیم فریت/گرافن اکسید کاهیده استفاده شد. شواهد نشان داد وجود گرافن اکسید کاهیده و تشکیل نانوچندسازه قادر است توانایی رنگ زدایی و تولید هیدروژن را از راه افزایش مساحت سطح فتوکاتالیست، کاهش بازترکیب الکترون-حفره و تقویت جذب فوتون، به مقدار قابل توجهی افزایش دهد. بازده تخریب پس از یک ساعت کار فتوواکنشگاه برابر با 84 درصد و سرعت آزادسازی هیدروژن برابر با 5567 میکرومول بر ساعت بر گرم فتوکاتالیست به دست آمد که بیانگر عملکرد خوب فتوکاتالیست نانوچندسازه برای حذف آلاینده و تولید سوخت است.

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