Sonochemical synthesis and characterization of Cl-doped TiO2 and its application in the photodegradation of phthalate ester under visible light irradiation
Sonochemical synthesis and characterization of Cl-doped TiO2 and its application in the photodegradation of phthalate ester under visible light irradiation
复制标题
DOI：
10.1016/j.cej.2012.02.078
复制
发表时间：
2012-05
影响因子：
15.1
通讯作者：
Xi-kui Wang;Chen Wang;Wen Jiang;Weilin Guo;Jing-Gang Wang
中科院分区：
文献类型：
--
作者：
Xi-kui Wang;Chen Wang;Wen Jiang;Weilin Guo;Jing-Gang Wang
通过在70°C下对钛酸四异丙酯和氯化钠的水/乙醇溶液进行超声处理，通过简单的一步法制备氯掺杂的二氧化钛（TiO 2）纳米晶。采用X射线衍射、透射电子显微镜、X射线光电子能谱和紫外-可见光谱对样品进行了表征。Cl 2 p XPS峰结合能为198.2eV，这被归因于掺入到TiO 2中的阴离子Cl，证实了氯化物掺杂剂的存在。Cl掺杂使TiO 2的吸收边向更高的波长移动。在可见光照射下，成功地将所制备的样品用于邻苯二甲酸丁基苄酯（BBP）水溶液的光降解。可见光照射240 min，BBP的光降解率可达92%。BBP矿化也实现了进一步增加照射时间。
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°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 198.2eV, which is assigned to the anionic Cl incorporated into TiO2. Cl-doping of TiO2shifts 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 240min. BBP mineralization was also realized by further increasing the irradiation time.