کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4407917 1618822 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced UV–visible response of bismuth subcarbonate nanowires for degradation of xanthate and photocatalytic reaction mechanism
ترجمه فارسی عنوان
واکنش نانوسیم های زیر کربنات بیسموت به منظور تخریب واکنش زنجان و واکنش فتوکاتالیتی
کلمات کلیدی
نانوسیمهای کربنات بیسموت، آلاینده زانتیا، تخریب فوتوکاتالیستی، نانوسیمهای هسته پوسته
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


• (BiO)2CO3 nanowires had well photocatalytic activity and recyclability for xanthate.
• Bi2S3@(BiO)2CO3 core–shell structure generated during photocatalytic reaction period.
• Bi2S3@(BiO)2CO3 core–shell structure enhanced photodegradation activity.
• A probable photocatalytic mechanism was proposed.

(BiO)2CO3 nanowires were prepared by simple hydrothermal treatment of commercial Bi2O3 powders and characterized by X-ray diffractometry, scanning electron microscopy, transmission electron microscopy (TEM), high-resolution TEM, and X-ray photoelectron spectroscopy (XPS). The photocatalytic activity of (BiO)2CO3 nanowires was studied through degradation of sodium isopropyl xanthate. Photocatalytic experimental results indicated that the as-prepared (BiO)2CO3 nanowires show high photocatalytic efficiency. Photocatalytic activity increased after two cycles. Time-dependent UV–vis spectra demonstrated that the final degradation products included isopropyl alcohol and carbon disulfide. UV–vis diffuse reflection spectra showed that the band gap of the as-prepared (BiO)2CO3 nanowires and recycled (BiO)2CO3 nanowires were 2.75 eV and 1.15 eV, respectively. XPS results indicated that formation of Bi2S3@(BiO)2CO3 core–shell nanowires occurred after recycled photodegradation of isopropyl xanthate owing to existence of two types of Bi configurations in the recycled (BiO)2CO3 nanowires. A probable degradation mechanism of isopropyl xanthate was also proposed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 149, April 2016, Pages 245–253
نویسندگان
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