سنتز و مشخصه‌یابی نانوکامپوزیت ZnO/CeO2/SiO2 به روش‌ سل- ژل برای ذخیره‌سازی الکتروشیمیایی هیدروژن

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده نانوفناوری، پردیس علوم و فناوری‌های نوین، دانشگاه سمنان، سمنان، ایران

2 گروه نانوشیمی، دانشکده نانوفناوری، پردیس علوم و فناوری‌های نوین، دانشگاه سمنان، سمنان، ایران

چکیده

در این مطالعه، نانوساختارهای SiO2، CeO2/SiO2، ZnO/SiO2 و ZnO/CeO2/SiO2 با روش سل- ژل به دو شکل با استفاده از پیش‌ماده‌های تترااتیل اورتوسیلیکات (TEOS)، سریم نیترات و روی نیترات سنتز شدند. در روش اول، نمک‌ها پس از اضافه شدن TEOS و در روش دوم پیش از اضافه شدن TEOS اضافه شدند. با تفاوت در ترتیب اضافه شدن مواد، پراکندگی مواد در کامپوزیت‌ها و اندازه‌ی ذرات تغییر محسوسی داشتند. بهترین شرایط از نظر ترکیب مواد و اندازه‌ی ذرات برای نانوکامپوزیت ZnO/CeO2/SiO2 سنتز شده به روش دوم بود. آنالیز‌های EDS، XRD، FT-IR، FESEM و BET برای نمونه‌ها جهت صحت تشکیل نانوساختار مورد انتظار انجام شد. در نهایت، نانوکامپوزیت ZnO/CeO2/SiO2 سنتز شده به روش دوم برای تعیین ظرفیت ذخیره‌سازی الکتروشیمیایی هیدروژن مورد ارزیابی قرار گرفت. با روش کرونوپتانسیومتری ظرفیت ذخیره‌سازی هیدروژن آن mAh/g 75/708 به ثبت رسید که نسبت به ظرفیت‌های گزارش شده‌ مقدار قابل توجهی است. مقایسه‌ی این عدد با میزان ظرفیت ذخیره‌سازی نانوساختار‌های سیلیکا و سریا نیز نشان دهنده‌ی تأثیر‌ سازنده‌ی این مواد بر روی هم است. مطابق با نتایج، روش دوم سنتز روشی مناسب‌تر برای ساخت این نانومواد جهت ذخیره‌سازی الکتروشیمیایی هیدروژن می‌باشد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Synthesis and characterization of ZnO/CeO2/SiO2 nanostructures by sol-gel method for electrochemical hydrogen storage

نویسندگان [English]

  • Mehdi Mousavi-Kamazani 1
  • Amir Hossein Reihani 2
1 Department of Nanotechnology, Faculty of New Sciences and Technologies, Semnan University, Semnan, Iran
2 Department of Nanotechnology, Faculty of New Sciences and Technologies, Semnan University, Semnan, Iran
چکیده [English]

In this study, SiO2, CeO2/SiO2, ZnO/SiO2, and ZnO/CeO2/SiO2 nanostructures were synthesized by sol-gel method in two ways using TEOS, cerium nitrate, and zinc nitrate as precursors. In the first method, salts were added at the end, but in the second method, TEOS was added at the end. With the difference in the order of adding materials, the distribution of materials in the composites and the size of the particles changed significantly. The best conditions in terms of material composition and particle size were for the ZnO/CeO2/SiO2 nanocomposite synthesized by the second method. EDS, FT-IR, FESEM, BET, and XRD analyzes were performed for the samples to confirm the formation of the expected nanostructure. Finally, the ZnO/CeO2/SiO2 nanocomposite synthesized by the second method was evaluated to determine the electrochemical hydrogen storage capacity. With the chronopotentiometric method, its hydrogen storage capacity was recorded as 708.75 mAh/g, which is a significant amount compared to the reported capacities. The comparison of this number with the storage capacity of silica and ceria nanostructures also shows the constructive effect of these materials on each other. According to the results, the second synthesis method is a more suitable method for making these nanomaterials for electrochemical hydrogen storage.

کلیدواژه‌ها [English]

  • Nanostructure
  • Sol-gel
  • Zinc/Ceria/Silica
  • Hydrogen storage
  • Chronopotentiometry

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نانومقیاس
دوره 10، شماره 3
مهر 1402
صفحه 51-64

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  • تاریخ دریافت: 02 اردیبهشت 1402
  • تاریخ بازنگری: 17 تیر 1402
  • تاریخ پذیرش: 13 شهریور 1402

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