کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
579664 | 1453146 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nitrogen-doped TiO2 modified with NH4F for efficient photocatalytic degradation of formaldehyde under blue light-emitting diodes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A nitrogen-doped TiO2 (N-TiO2) photocatalyst was prepared by calcination of the hydrolysis precipitate of Ti(SO4)2 with aqueous ammonia. The prepared N-TiO2 was treated with NH4F (F-N-TiO2) by an impregnation-calcination method. The photocatalyst (F-N-TiO2) was characterized by X-ray diffraction (XRD), Fourier Transform Infrared (FT-IR), UV-vis diffusive reflectance spectroscopy (DRS), BET and X-ray photoelectron spectroscopy (XPS). With blue light-emitting diode (LED) as the light source, its photocatalytic activity for the degradation of formaldehyde was investigated. NH4F treatment enhances markedly photocatalytic activity of N-TiO2. The treatment increases the visible absorption of N-TiO2, decreases its specific surface area and influences the concentration of oxygen vacancies in N-TiO2. Photocatalytic activity of F-N-TiO2 depends on the visible absorption, the specific surface area, and the concentration of oxygen vacancies. The preparation conditions, such as the calcination temperature and the initial molar ratio of NH4F to N-TiO2, have a significant influence on the photocatalytic activity. The doping mechanism of NH4F was investigated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 182, Issues 1â3, 15 October 2010, Pages 90-96
Journal: Journal of Hazardous Materials - Volume 182, Issues 1â3, 15 October 2010, Pages 90-96
نویسندگان
Yuexiang Li, Yuan Jiang, Shaoqin Peng, Fengyi Jiang,