حذف فوتوکاتالیزوری رنگزای رودامین ب توسط SnIn4S8 : بهینه‌سازی فرآیند به روش سطح پاسخ
محورهای موضوعی : مطالعات آزمایشگاهی و میدانی در مورد اصلاح/کاهش آلودگی محیطی از طریق تکنیک های نوظهور
علی مهریزاد
1
(گروه شیمی، واحد تبریز، دانشگاه آزاد اسلامی، تبریز، ایران)
کلید واژه: قلع ایندیوم سولفید, رودامین ب, فرآیند فوتوکاتالیزوری, روش سطح پاسخ, سینتیک,
چکیده مقاله :
در این مطالعه، عملکرد قلع ایندیوم سولفید (SnIn4S8) در حذف فوتوکاتالیزوری رنگزای رودامین ب (RhB) به عنوان یک نمونه از آلاینده‌های محیط زیست، مورد بررسی قرار گرفت. از طراحی آزمایش به روش سطح پاسخ (RSM) جهت بهینه‌سازی متغیرهای عملیاتی (غلظت اولیه RhB، مقدار SnIn4S8، pH محلول و زمان تابش نور) استفاده شد. بر اساس نتایج، حداکثر راندمان حذف RhB به مقدار %15/81 در شرایط بهینه حاصل شد. راندمان تئوری حاصل از طراحی آزمایش به روش تجربی نیز تأیید شد (%96/78) و از این طریق، دقت و صحت مدل پیشنهادی مورد تأیید واقع شد. مطالعه سینتیک حذف فوتوکاتالیزوری رنگزای RhB توسط SnIn4S8 نشان داد که فرآیند مذکور از مدل سینتیکی شبه درجه اول با ثابت سرعت min-1 0/047 تبعیت می‌کند. در واقع، فعالیت فوتوکاتالیزوری چشمگیر SnIn4S8 ناشی از ساختار گل مانند آن است که باعث افزایش جذب فوتون‌های نور و جذب سطحی بیشتری از گونه آلاینده می‌شود.
In this study, the performance of stannum indium sulfide (SnIn4S8) was evaluated for photocatalytic degradation of Rhodamine B dye (RhB) as an environmental pollutant. Response surface methodology (RSM) was utilized to optimize the effective operating variables (initial RhB concentration, SnIn4S8 amount, solution pH, and irradiation time). Maximum removal efficiency of 81.15% was achieved under optimum conditions. This predicted result was confirmed experimentally (78.96%). The kinetics study of photocatalytic RhB removal by SnIn4S8 showed adherence to the pseudo-first-order kinetic model with a rate constant of 0.047 min-1. The outstanding performance of SnIn4S8 originated from its flowerlike hierarchical structure, which enhances light photon absorption, and increases pollutant adsorption.
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