همنهشت و مشخصه‌یابی نانوساختار چارچوب فلز آلی UiO-66

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی شیمی، نفت و گاز، دانشگاه سمنان- سمنان- ایران

2 دانشکده مهندسی شیمی-نفت و گاز- دانشگاه سمنان- سمنان- ایران

3 دانشکده مهندسی شیمی، دانشگاه تهران- -تهران-ایران

چکیده

هدف از مقالۀ حاضر، همنهشت و مشخصه‌یابی نانوساختار چارچوب فلز آلیUiO-66  است؛ این همنهشت با استفاده از زیرکونیوم ‌تتراکلراید، ترفتالیک ‌اسید، ان‌و‌ان- دی ‌متیل ‌فرمامید و کلروفرم انجام شد. UiO-66  همنهشت‌شده با تجزیه‌های  XRD، FT-IR، FESEM  وBET مشخصه‌یابی شد. در منحنی XRD، پیک‌های مشخصه در زوایایθ 2 برابر 4/7، 5/8 و 8/25 درجه مشاهده شد که همنهشت موفق نانوذرات بلورین UiO-66 را تأیید می‌کند. تجزیۀ
 FT-IR، تشکیل گروه‌های عاملی مشخصۀ OH در cm-1 3428  کشش نامتقارن O-C-O
در cm-1 1566، کشش متقارن O-C-O در cm-1 1399 و ارتعاش کششی پیوندZr-O چارچوب در cm-1 1082 را در ساختار UiO-66 نشان داد. نتایج تجزیۀFESEM، تشکیل بلور‌های منفرد مکعبی UiO-66 با ریخت‌شناسی هشت‌ضلعی را نشان داد و نانوذرات در محدودۀ 30 تا 60 نانومتر مشاهده شد. منحنی جذب- واجذب نیتروژن UiO-66 از نوع I بود و مساحت سطح ویژۀ  BET، حجم حفرۀ کل و میانگین قطر حفره‌ها به‌ترتیب برابر با
m2/g 1130/9، cm3/g 1129/1 و nm 0425/4 حساب شد که مساحت سطح بزرگ و حجم حفرۀ زیاد UiO-66 را تأیید می‌کند.

کلیدواژه‌ها


عنوان مقاله [English]

Synthesis and Characterization of UiO-66 Metal Organic Framework Nanostructure

چکیده [English]

The purpose of the present work is to synthesize and characterize of the nanostructure of the metal organic framework of UiO-66. Synthesis was performed using zirconium tetrachloride, terephthalic acid,
N, N-dimethylformamide and chloroform. The synthesized UiO-66 was characterized by XRD, FT-IR, FESEM and BET analysis. In the XRD curve, characteristic peaks were observed at 2θ angles of 7.4°, 8.5° and 25.8°, which confirm the successful synthesis of UiO-66 crystalline nanoparticles. The FT-IR analysis showed the formation of functional groups of OH at 3428 cm-1, O-C-O asymmetric stretch at 1566 cm-1, O-C-O symmetric stretch at 1399 cm-1 and Zr-O bond stretching vibration of the framework at 1082 cm-1 in UiO-66 structure. The results of FESEM analysis showed the formation of single cubic crystals of UiO-66 with octagonal morphology and nanoparticles were observed in the range of 30 to 60 nm. Nitrogen adsorption-desorption curve of UiO-66 was from type I and the specific surface area of ​​BET, total pore volume and average pore diameter were
1130.9 m2/g, 1.1429 cm3/g and 4.425 nm, respectively, which confirm the large surface area and high pore volume of UiO-66.

کلیدواژه‌ها [English]

  • Crystalline Nanoparticles
  • Metal organic framework
  • Octagonal Morphology
  • UiO-66

 

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