文档介绍：Application of N-F-codoped TiO2 for the
Photocatalytic Reduction of Cr(VI) under Visible
Light Irradiation
*†††‡*†
Qi Wang, Zhaohui Wang,ǂ Yi Zhang, Yanqing Cong, Jincai Zhao and Peide Sun
† School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
‡ Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry,
The Chinese Academy of Science, Beijing 100190, China
ǂ College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
Abstract—The visible light responsive N-F-codoped TiO2 materials have been reported to be an innovative treatment
(hereafter denoted as NFT) was prepared by sol-gel method using technologies [12,13]. The standard redox potential of Cr(VI) is
NH4F as precursor. NFT powders were characterized by X-ray + V vs NHE [14], higher than the conduction band
photoelectron spectroscopy (XPS), scanning electron microscopy potential of TiO2, thus it is thermodynamically possible that
(SEM), transmission electron microscopy (TEM) and ultraviolet- Cr(VI) will capture photogenerated electrons in the conduction
visible diffuse reflection spectroscopy (UV-Vis-DRS). The as-
band. For example, when TiO2 were illuminated with UV light,
prepared NFT powders could efficiently reduce Cr(VI) to Cr(III) highl