کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
71921 49003 2016 9 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
Synthesis of mesoporous La2Zr2O7 with high surface area by combining epoxide-mediated sol-gel process and solvothermal treatment
ترجمه فارسی عنوان
سنتز La2Zr2O7 متخلخل با مساحت سطح بالا با ترکیب فرآیند سل ـ ژل ـ اپوکسید با واسطه و تصفیه solvothermal
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


• Mesoporous La2Zr2O7 was successfully prepared by combining epoxide-mediated sol-gel process and solvothermal treatment.
• Mesoporous La2Zr2O7 showed nanoparticles assembling and mesoporous structure, with a surface area of 302.9 m2/g.
• The structure evolution of mesoporous La2Zr2O7 at high temperature was investigated.

Mesoporous La2Zr2O7 was successfully prepared by combining epoxide-mediated sol-gel process and solvothermal treatment. The gelation was controlled by addition of propylene oxide to the ethanol solutions of nitrates. Solvothermal treatment was adopt to strengthen the mesopore structure and inhibit the collapse of pores during abiment pressure drying, and it obviously increased surface area. The as-synthesized mesoporous La2Zr2O7 showed nanoparticles assembling and mesoporous structure, and the nanoparticles has a surface area of 302.9 m2/g and an average pore size of 22.2 nm. The mesoporous La2Zr2O7 has an amorphous structure with some organic component. After heat treatment, the inorganic transformation occurred and it crystallized into pyrochlore structure. With increase of heat treatment temperature, the particles of mesoporous La2Zr2O7 become larger for the sintering of nanocrystalline La2Zr2O7. The surface area can retain at 92.7 m2/g after 600 °C, and decreased to 12.4 m2/g after 1200 °C for 3 h. This facile route provides a low-cost strategy for the preparation of mesoporous metal oxide with high surface area.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microporous and Mesoporous Materials - Volume 234, 1 November 2016, Pages 137–145
نویسندگان
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