مجله آب و فاضلاب

مجله آب و فاضلاب

سنتز تک‌ مرحله‌ای کامپوزیت نیترات بیسموت و فلز بیسموت برای افزایش تخریب فتوکاتالیستی رنگ‌زای رودامین B

نوع مقاله : مقاله پژوهشی

نویسندگان
صغری یعقوبی رهنی 1
حبیب ا... یونسی 2
1 مربی، گروه محیط‌زیست، دانشکده مهندسی، دانشگاه ولایت، ایرانشهر، سیستان و بلوچستان، ایران
2 استاد، گروه محیط‌زیست، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس، تهران، ایران
10.22093/wwj.2025.524151.3494
چکیده
نمک‌های بازی بیسموت به‌دلیل ارزان بودن و بی‌ضرر بودن کاربردهای گسترده‌ای دارند و امروزه به‌عنوان فتوکاتالیست مورد توجه هستند. این پژوهش به سنتز تک‌ مرحله‌ای کامپوزیت نیترات بیسموت بازی (BBN) و عنصر بیسموت (Bi) با استفاده از کاهنده NaBH4 طی سنتز گرمابی پرداخت تا کارایی فتوکاتالیستی آن در تخریب رنگ‌زای رودامین B بهبود یابد. نتایج نشان داد که افزودن NaBH4 منجر به بهبود ساختار سه‌بعدی دندانه‌ای متشکل از ورقه‌های دوبعدی و ایجاد بیسموت فلزی روی سطح و نقص‌های ساختاری می‌شود که به بهبود کارایی فتوکاتالیستی BBN منجر می‌شود. آنالیزهای FTIR و DRS ، UV-Vis حضور گروه‌های نیترات و کاهش نوار گپ از 33/3 به ev09/3 را نشان دادند. نمونه سنتز شده با مقدار g0075/0 از NaBH4، بیشترین فعالیت فتوکاتالیستی در تخریب رودامین B را داشت و بیش از 95درصد محلول رنگ‌زای رودامین B طی 30 دقیقه با لامپ UV با توان 6 وات حذف شد که می‌تواند ناشی از اثر پلاسمون سطحی بیسموت فلزی و استحصال مؤثر نور در ساختار لایه‌ای سنتز شده باشد.
کلیدواژه‌ها
نیترات بیسموت بازی
سنتز گرمابی
فتوکاتالیست
ساختار سه‌بعدی
رودامین B

موضوعات

عنوان مقاله English

One-Step Synthesis of Basic Bismuth Nitrate and Bismuth Metal Composite (Bi/BBN) to Enhance Photocatalytic Degradation of Rhodamine B Dye

نویسندگان English

Soghra Yaghoobi Rahni 1
Habibollah Younesi 2
1 Instructor, Dept. of Environmental Engineering, Faculty of Engineering, Velayat University, Iranshahr, Sistan and Baluchestan, Iran
2 Prof., Dept. of Environmental Engineering, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Tehran, Iran
چکیده English

Bismuth basic salts have wide applications due to their low cost and non-toxicity, and are at present being studied as photocatalysts. This research focuses on the one-step synthesis of a basic bismuth nitrate and bismuth metal (Bi) composite using sodium borohydride (NaBH4) as a reducing agent in the hydrothermal synthesis to enhance its photocatalytic efficiency in degrading the Rhodamine B dye. Results showed that adding NaBH4 leads to the improvement of the three-dimensional meshing-tooth structure composed of 2D sheets and the formation of metallic bismuth on the BBN surface, and the creation of structural defects. These modifications result in enhanced photocatalytic efficiency of BBN. FTIR and UV-Vis DRS analyses revealed the presence of nitrate groups and a reduction in bandgap from 3.33 to 3.09 eV. The sample synthesized with 0.0075 g of NaBH4 demonstrated the highest photocatalytic activity in Rhodamine B degradation, with more than 95% of the Rhodamine B dye solution removed by UV-C 6W during 30 min. This is attributed to the surface plasmonic effect of metallic bismuth and efficient light harvesting by the layered structure.

کلیدواژه‌ها English

Basic Bismuth Nitrate
Hydrothermal Synthesis
Photocatalyst
3D Structure
Rhodamine B
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مجله آب و فاضلاب
دوره 36، شماره 1 - شماره پیاپی 156
فروردین و اردیبهشت 1404
صفحه 43-57