نوع مقاله : مقاله کامل پژوهشی
نویسندگان
1 استادیار، پژوهشکده انرژی، پژوهشگاه مواد و انرژی، مشکین دشت، البرز، ایران
2 استاد، دانشکده شیمی، پردیس علوم، دانشگاه تهران، تهران، تهران، ایران
3 استاد، پژوهشکده نیمه هادی‌ها، پژوهشگاه مواد و انرژی، مشکین دشت، البرز، ایران
چکیده
در این پژوهش، نانوساختارهای خالص گارنت ایتریوم آلومینیوم YAG, Y3Al5O12)) طی فرایند دو مرحله‌ای و با استفاده از پیش‌‌ماده‌های کلریدی در محلول الکترولیت آب–اتانول با نسبت مشخص سنتز شدند و تأثیر سورفکتانت کاتیونی CTAB بر اندازه ذرات و ریخت‌شناسی نانوساختارهای تولیدشده مورد بررسی قرار گرفت. برای سنتز YAG، لایهای از فیلم هیدروکسید به روش ترسیب الکتروشیمیایی کاتدی در سطح کاتد نشانده شد و سپس طی عملیات حرارتی، به فرآورده اکسید نهایی تبدیل شد. از آنالیز پراش پرتو ایکس (XRD)، طیف‌سنجی تبدیل فوریه فروسرخ (FTIR)، گرماسنجی تفاضلی و وزن‌سنجی حرارتی (DTA-TGA) و میکروسکوپ الکترونی روبشی (SEM)، به‌ترتیب برای شناسایی فاز و ساختار بلوری ماده به‌دست‌آمده، شناسایی باندهای جذبی آن، بررسی رفتار حرارتی رسوب هیدروکسید در هنگام عملیات حرارتی و تعیین ریخت‌شناسی و اندازه ذرات پودر حاصل استفاده شد. نتایج مطالعات نشان داد که ترسیب الکتروشیمیایی کاتدی، روشی عملی و بسیار کارآمد برای تهیه نانوساختارهای YAG است و افزودن سورفکتانت کاتیونی CTAB به الکترولیت به هنگام ترسیب الکتروشیمیایی می‌تواند سبب تشکیل ذرات ریزتر شود و همچنین تأثیر چشمگیری در یکنواختی و توزیع باریک‌تر اندازه ذرات دارد.
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
Electrochemical Synthesis of Yttrium Aluminum Garnet Nanostructures in the Presence of Cationic Surfactant: CTAB
نویسندگان [English]
- Mojtaba Hosseinifard 1
- Hassan Goldooz 2
- Alireza Badiei 2
- Asghar Kazemzadeh 3
- Kamran Aََhmadi 3
1 Assistant Professor, Department of Energy, Materials and Energy Research Center (MERC), Meshkindasht, Alborz, Iran
2 Professor, School of Chemistry, College of Science, University of Tehran, Tehran, Tehran, Iran
3 Professor, Department of Semiconductors, Materials and Energy Research Center (MERC), Meshkindasht, Alborz, Iran
چکیده [English]
In this research, pure Yttrium Aluminum Garnet (YAG, Y3Al5O12) nanostructures were synthesized through a two-step process by using chloride precursors in a solution of water–ethanol electrolyte with specific ratio. Also, the effect of cationic surfactant CTAB, on the size and the morphology of the prepared nanostructures were investigated. For the synthesis of YAG, a layer of hydroxide film was deposited on the surface of cathode via cathodic electrodeposition method and then, it was transformed to the final oxide product in the course of a thermal operation. X-Ray Diffraction (XRD) analysis was used for characterization of phase and crystal structure of prepared materials and also Fourier Transform Infra-Red spectroscopy (FTIR) was used for characterization of absorption bonds. Thermal behavior of deposited hydroxide during the thermal operation was studied by Differential Thermal Analysis and Thermal Gravimetric Analysis (DTA-TGA) technique. The morphology and particle size of obtained powder was determined by Scanning Electron Microscopy (SEM). The results of our studies showed that the cathodic electrodeposition method is a practical and very efficient method for preparation of YAG nanostructures and addition of a cationic surfactant like CTAB into the electrolyte during the electrochemical deposition can lead to the formation of smaller particles and also has an impressive effect on the homogeneity and narrower particles size distribution.
کلیدواژه‌ها [English]
- Nanostructures
- Cathodic Electrodeposition
- Electrolyte
- Hydroxide Film
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