تاثیر شرایط سنتز بر خواص فیزیکی چارچوب زئولیت ایمیدازولات ZIF-8

نوع مقاله : مقاله پژوهشی

نویسنده

دانشکده فیزیک، دانشگاه سمنان، سمنان، ایران

چکیده

در این مقاله تاثیر نحوه اضافه کردن پیش‌ماده ها بر خواص فیزیکی ترکیب ZIF-8 تهیه شده به روش همرسوبی، بررسی شده است. خواص فیزیکی شامل ویژگی‌های ساختاری و پیوندهای شکل گرفته در ترکیبات سنتز شده، بررسی شد. همچنین، با توجه به اهمیت میزان تخلخل در ترکیب ZIF-8 ، مساحت سطح ویژه، حجم حفرات و سایر پارامترهای مرتبط با تخلخل بررسی گردید. نتایجXRD سنتز ساختار ZIF-8 را تائید کرد. همچنین آنالیز FTIR نشان داد که در هر دو نمونه پیوندها به خوبی شکل گرفته است. تصاویر میکروسکوپ الکترونی روبشی (SEM) نشان داد که نانوذراتی با ابعاد بین 80 تا 110 نانومتر شکل گرفته است. همچنین مشخص شد که اگر پیش ماده ها به صورت آهسته و قطره قطره به همدیگر افزوده شوند، نانو ساختارهایی با قطر ذرات کوچکتر، مساحت سطح ویژه بیشتر و تخلخل بالاتر شکل می‌گیرد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

The effect of preparation conditions on physical properties of ZIF-8

نویسنده [English]

  • Nafiseh Memarian
faculty of physics/ Semnan university
چکیده [English]

Abstract: In this article, the effect of adding precursors condition on the physical properties of ZIF-8 compound prepared by co-precipitation method has been investigated. The physical properties, including structural properties as well as bonds formation in the synthesized compounds were studied. Also, considering the importance of porosity in ZIF-8, specific surface area, total pore volume, and other parameters related to porosity were investigated. The XRD results confirmed the synthesis of ZIF-8 structure. Also, FTIR analysis showed that the bonds were well formed in both samples. Scanning electron microscope (SEM) images showed that nanoparticles with dimensions between 80 and 110 nm were formed. It was also found that if the precursors are added slowly and drop by drop, the nanostructures with smaller particle diameter, higher specific surface area with more porosity are formed.

Abstract: In this article, the effect of adding precursors condition on the physical properties of ZIF-8 compound prepared by co-precipitation method has been investigated.

کلیدواژه‌ها [English]

  • metal-organic frameworks؛ ZIF-8
  • preparation condition
  • specific surface area
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