بررسی کارایی نانوکامپوزیت Sr-Ce-ZnO/Hap در تخریب کاتالیستی نوری آلاینده رودامین B در حضور نور مرئی

نوع مقاله : علمی-پژوهشی

نویسندگان

دانشکده شیمی، گروه شیمی معدنی، دانشگاه صنعتی خواجه نصیر الدین طوسی، تهران

چکیده

در این پژوهش، سنتز و شناسایی نانوکامپوزیت اصلاح شده Sr-Ce-ZnO/Hap  در تخریب آلاینده رودامین B تحت تابش مرئی مورد بررسی قرار گرفت. ساختار نانوکامپوزیت Sr-Ce-ZnO/HAp با استفاده از طیف‌سنجی تبدیل فوریه فروسرخ (FT-IR)، پراش پرتو ایکس (XRD)، میکروسکوپ الکترونی روبشی (SEM)، طیف‌سنجی پراش انرژی پرتو ایکس(EDX) ، دستگاه طیف‌سنجی مرئی ـ فرابنفش (UV-Vis)، طیف بازتاب پخشی (DRS) و اندازه‌گیری تخلخل ­سنجی جذب و واجذب با آنالیز BET تایید شد. ارزیابی­ ها نشان دادند که آلایش با کاتیون ‍های فلزی و حضور هیدروکسی آپاتیت منجر به کاهش شکاف انرژی، افزایش سطح، افزایش جذب و کاهش بازترکیب الکترون ـ روزنه می ­شود. همچنین نتیجه‌ها نشان دادند که مقدار بیش از 91 درصد رودامین B طی مدت زمان 90 دقیقه پس از آغاز واکنش حذف شد. سنتیک واکنش مرتبه اول و ثابت سرعت min-1 023/0 به دست آمد.

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