Ultrasonic fabrication of N-doped TiO2 nanocrystals with mesoporous structure and enhanced visible light photocatalytic activity
Publication in refereed journal

香港中文大學研究人員

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摘要An ultrasonic method was developed to fabricate novel mesoporous TiO2 nanocrystals doped with a high concentration of N (N/TiO2). The nanocrystals were characterized by physicochemical methods including N-2 physical adsorption/desorption, X-ray diffraction, X-ray photoelectron spectroscopy, photoluminescence spectroscopy, transmission electron microscopy, and UV-Vis diffuse reflectance spectroscopy. The photocatalytic degradation of dimethyl phthalate, a hazardous chemical in water, by the prepared N/TiO2 nanocrystals under visible light irradiation (400-660 nm) was investigated. The results show that N-doping efficiency under ultrasonic irradiation is 3.2 times higher than under typical conditions, and the produced TiO2 nanocrystals have mesoporous structure. N/TiO2 fabricated under ultrasound exhibited much higher efficiency for the degradation of dimethyl phthalate than that prepared under typical conditions. The high photocatalytic degradation activity of N/TiO2 fabricated under ultrasound is mainly attributed to its high N content effectively increasing its ability to absorb visible light. (c) 2013, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
著者Zhou Wq, Yu CL, Fan QZ, Wei LF, Chen JC, Yu JC
期刊名稱Chinese Journal of Catalysis
出版年份2013
月份6
日期1
卷號34
期次6
出版社SCIENCE PRESS
頁次1250 - 1255
國際標準期刊號0253-9837
電子國際標準期刊號1872-2067
語言英式英語
關鍵詞Dimethyl phthalate; Ethylene diamine; Nitrogen doping; Titania nanocrystal; Ultrasound
Web of Science 學科類別Chemistry; Chemistry, Applied; CHEMISTRY, APPLIED; Chemistry, Physical; CHEMISTRY, PHYSICAL; Engineering; Engineering, Chemical; ENGINEERING, CHEMICAL

上次更新時間 2020-11-09 於 02:14