期刊
ARABIAN JOURNAL OF CHEMISTRY
卷 13, 期 11, 页码 8347-8360出版社
ELSEVIER
DOI: 10.1016/j.arabjc.2020.05.019
关键词
Fe-N co-doped TiO2; Acid Orange 7 Azo Dye; Photocatalysis; Visible Light; Discoloration; Mineralization; Electric Energy Consumption
Fe-N -co-doped TiO(2 )photocatalysts are prepared by sol-gel method using titanium tetraisopropoxide, urea and iron(II) acetylacetonate as precursors of titania, nitrogen and iron, respectively. The prepared samples are analysed from chemical-physical point of view by X-ray diffraction (XRD), Raman spectroscopy, UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), specific surface area measurements and scanning electron microscopy (FESEM). UV-Vis DRS spectra evidence that the co-doping of TiO2 with N and Fe leads to the narrowing of the band gap value (2.7 eV) with respect to Fe-doped TiO2 (2.8 eV) and N-doped TiO2 (2.9-3 eV). XRD patterns show that photocatalysts are mainly in anatase phase and Fe and N ions are successfully incorporated into the TiO2 lattice. The average crystallite size of Fe-N co-doped TiO2 is slightly lower than the other samples and equal to about 7 nm and the specific surface area of the co-doped sample results to be 117 m(2) g(-1). Photocatalytic performances of all prepared samples are evaluated by analysing the degradation of Acid Orange 7 azo dye under visible light irradiation. Photocatalytic efficiency obtained using Fe-N co-doped TiO2 strongly increases compared to undoped TiO2 , N-doped TiO2 and Fe-doped TiO2 photocatalysts. In detail, using the co-doped photocatalyst, dye discoloration and mineralization result equal to about 90 and 83% after 60 min of LEDs visible light irradiation, underlining the best performances of the Fe-N co-doped TiO2 photocatalyst both in terms of treatment time and electric energy consumption. (C) 2020 The Author(s). Published by Elsevier B.V. on behalf of King Saud University.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据