Sonochemical synthesis and characterization of Cl-doped TiO₂ and its application in the photodegradation of phthalate ester under visible light irradiation

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• 作者：Xi-Kui Wang^a ; ^b ; ^{xk_wang@spu.edu.cn} ; ^{xk_wang@sdili.edu.cn} ; Chen Wang^a ; ^b ; Wen-Qiang Jiang^a ; ^b ; Wei-Lin Guo^c ; Jing-Gang Wang^c
• 关键词：Chlorine-doped TiO2 ; Sonochemical synthesis ; Photodegradation ; Butyl benzyl phthalate
• 刊名：Chemical Engineering Journal
• 出版年：2012
• 期刊代码：16_13858947
• 类别：ce
• 出版时间：1 May, 2012
• 卷：189-190
• 期：Complete
• 页码：288-294
• 文件大小：878 K

摘要

Chlorine-doped anatase titanium dioxide (TiO₂) nanocrystallites were prepared via a simple single-step method by sonicating a solution of tetraisopropyl titanate and sodium chloride in water/ethanol at 70 掳C. The as-prepared sample was characterized using X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and ultraviolet-visible spectroscopy. The presence of the chloride dopant is confirmed by the Cl 2p XPS peak with a binding energy of 198.2 eV, which is assigned to the anionic Cl incorporated into TiO₂. Cl-doping of TiO₂ shifts the absorption edge toward a higher wavelength. The as-prepared samples were successfully used in the photodegradation of aqueous butyl benzyl phthalate (BBP) under visible light irradiation. The photodegradation rates of BBP reached 92%under visible light irradiation for 240 min. BBP mineralization was also realized by further increasing the irradiation time.