شیمى کاربردى روز

شیمى کاربردى روز

سنتز و شناسایی پالادیوم تثبیت شده بربستر سیلیسیم کاربید به عنوان یک فتوکاتالیست ناهمگن در واکنش جفت شدن هک تحت تابش نور مرئی

نوع مقاله : مقاله علمی پژوهشی

نویسندگان
1 گروه شیمی، دانشکده علوم پایه، دانشگاه صنعتی خاتم الانبیاء (ص) بهبهان، بهبهان،6361663973 ایران
2 شرکت ملی گاز ایران، مجتمع گاز پارس جنوبی، عسلویه، ایران
چکیده
واکنش هک به عنوان یک روش مؤثر در سنتز ترکیبات آلی با اهمیت بالا شناخته می‌شود و استفاده از فتوکاتالیست‌ها به ویژه نانوذرات پالادیوم می‌تواند بازده و انتخاب‌پذیری این واکنش‌ها را به طور قابل توجهی افزایش دهد. در این تحقیق کاتالیست هتروژن پالادیوم / سیلیسیم کاربید ((Pd/SiC به عنوان فتوکاتالیستی موثر و مفید در واکنش جفت شدن هک بین استایرن و آریل هالیدهای مختلف تحت شرایط فتوشیمیایی و ملایم استفاده شد. تأثیر پارامترهای مختلف از جمله نوع حلال، دما و مقدار کاتالیست بر روی کارایی فتوکاتالیستی نانوذرات پالادیوم بررسی شد. این فرآیند تحت شرایط بهینه واکنش، بازده خوب تا عالی را ارائه می‌دهد. نانوکاتالیست سنتزی با تکنیک های پراش اشعه ایکس (XRD)، میکروسکوپ الکترونی عبوری (TEM)، میکروسکوپ الکترونی روبشی نشر میدانی (FE-SEM)، طیف سنجی مادون قرمزFT-IR))، آزمونهای تخلخل سنجی و سطح (BET)، جذب و واجذب گاز نیتروژن، پلاسمای جفت شده القایی(ICP) و طیف‌ سنجی مرئی-فرابنفش (UV-vis) مورد شناسایی قرار گرفت. ارزان بودن بستر کاتالیستی, سطح فعال مطلوب، بازیافت ساده کاتالیست و سنتز ترکیبات متنوع از مشتقات الکنی با بهره خوب در زمان کم، دما و فشار محیط تحت نور مرئی از مزایای این نانوکاتالیست می باشد.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Synthesis and Characterization of Palladium Stabilized Silicon Carbide as a Heterogeneous Photocatalyst in Heck Coupling Reaction under Visible Light Irradiation

نویسندگان English

Zahra Bazyar 1
neda baluchi 1
mohammad zarei 2
1 Department of Chemistry, Faculty of Basic Sciences, Behbahan Khatam Alanbia University of Technology, Behbahan, 63616-63973, I. R. Iran
2 National Iranian Gas Company (NIGC), South Pars Gas Complex (SPGC), Asaluyeh, Iran
چکیده English

The Heck reaction is recognized as an effective method for the synthesis of high-value organic compounds, and the use of photocatalysts, particularly palladium nanoparticles, can significantly enhance the yield and selectivity of these reactions. In this study, the heterogeneous catalyst palladium/silicon carbide (Pd/SiC) was employed as an effective and useful photocatalyst in the Heck coupling reaction between styrene and various aryl halides under mild photochemical conditions. The impact of various parameters, including solvent type, temperature, and catalyst amount, on the photocatalytic efficiency of palladium nanoparticles was investigated. Under optimized reaction conditions, this process yields well to excellent results. The synthesized nanocatalyst was characterized using techniques such as X-ray diffraction (XRD), Fouriertransform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), porosimetry and surface area analysis (BET), nitrogen adsorption and desorption, ICP methods, and UV-Vis spectroscopy. The advantages of this nanocatalyst include the low cost of the catalytic support, desirable active surface, simple catalyst recovery, and the synthesis of diverse alkenyl derivatives with good yields in a short time at ambient temperature and pressure under visible light

کلیدواژه‌ها English

Heck Coupling Reaction
Photocatalysts
Palladium
Heterogeneous
Recycling
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