ساخت نانومیله‎های وانادات بیسموت به‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌روش حرارتی و بررسی فعالیت فوتوکاتالیستی آن‌ها در تجزیۀ رنگ قرمز کنگو

محورهای موضوعی : تحقیقات در علوم مهندسی سطح و نانو مواد

نسرین قزکوب ¹

1 - گروه فیزیک، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران.

تاریخ دریافت : 1400/11/12 تاریخ پذیرش : 1401/02/01 تاریخ انتشار : 1401/03/01

کلید واژه: نانومیله, ساختار بلوری, فوتوکاتالیستی, وانادات بیسموت, قرمز کنگو,

چکیده مقاله :

در این مقاله، خواص ساختاری، نوری و فوتوکاتالیستی نانومیله‌های وانادات بیسموت مورد بررسی و مطالعه قرار گرفت. نانومیله‎های وانادات بیسموت (BiVO4) به‌روش حرارتی و در حضور قالب نرم PEG (Polyethylene glycol) ساخته ‌شدند. برای مشخصه یابی نانومیله‎ها از آنالیزهای پراش پرتوی ایکس (XRD)، میکروسکوپ الکترونی روبشی گسیل میدانی (FESEM)، طیف نگاری پراکندگی انرژی (EDS) و طیف سنجی جذبی مرئی- فرابنفش (UV-Vis) استفاده شد. الگوی XRD تأییدکنندۀ تشکیل ساختار تک‌میل برای نانومیله‎ها است و نتایج آنالیز XRDوEDS نشان دادند که در نانومیله‌ها عنصر ناخالصی وجود ندارد. از تصویر FESEM مشخص شد که متوسط اندازۀ قطر و طول نانومیله‎ها به ترتیب برابر 37 و439 نانومتر است. آنالیز UV-Vis نشان داد که شکاف نوری نانومیله‌های وانادات بیسموت برابرeV 22/2 است که در محدوده نورمرئی قرار دارد. فعالیت فوتوکاتالیستی نانومیله‎ها توسط تجزیه فوتوکاتالیستی رنگ قرمز کنگو تحت تابش نور مرئی بررسی شد. طبق نتایج این تحقیق، نانومیله‎های وانادات بیسموت با ساختار تک‌میل، گزینۀ مناسبی جهت تجزیۀ مواد آلی با نور خورشید می‌باشد.

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