کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5350962 | 1503556 | 2017 | 43 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fabrication of Ni-doped BiVO4 semiconductors with enhanced visible-light photocatalytic performances for wastewater treatment
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
A visible-light-driven Ni-doped BiVO4 photocatalyst was synthesized using a microwave hydrothermal method. The nominal Ni doping amount of 1Â wt% provided excellent photoactivity for a variety of water pollutants, such as ibuprofen (pharmaceutical), Escherichia coli (bacteria), and green tides (phytoplankton). Each Ni-doped BiVO4 sample exhibits better performance than pure BiVO4. The degradation of ibuprofen reaches 80% within 90Â min, the deactivation of Escherichia coli reaches around 92% within 5Â h, and the inactivation of green tide (Chlamydomonas pulsatilla) reaches 70% upon 60Â min of the visible light irradiation. The first principle calculation and thermodynamic modeling revealed that Ni doping in the vanadium site gives the most stable configuration of the synthesized samples with the formation of an in-gap energy state and oxygen vacancies. The in-gap energy state and the oxygen vacancies serve as an electron-trapping center that decreases the migration time of the photogenerated carrier and increases the separation efficiency of electron-hole pairs, which are responsible for the observed efficient photocatalytic, anti-bacterial and anti-algal activity of the samples. These properties thus suggest potential applications of Ni-doped BiVO4 as a multifunctional material in the field of wastewater treatment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 413, 15 August 2017, Pages 253-265
Journal: Applied Surface Science - Volume 413, 15 August 2017, Pages 253-265
نویسندگان
Chhabilal Regmi, Yuwaraj K. Kshetri, Tae-Ho Kim, Ramesh Prasad Pandey, Schindra Kumar Ray, Soo Wohn Lee,