Ultrasonic fabrication of N-doped TiO2 nanocrystals with mesoporous structure and enhanced visible light photocatalytic activity
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AbstractAn 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.
All Author(s) ListZhou Wq, Yu CL, Fan QZ, Wei LF, Chen JC, Yu JC
Journal nameChinese Journal of Catalysis
Year2013
Month6
Day1
Volume Number34
Issue Number6
PublisherSCIENCE PRESS
Pages1250 - 1255
ISSN0253-9837
eISSN1872-2067
LanguagesEnglish-United Kingdom
KeywordsDimethyl phthalate; Ethylene diamine; Nitrogen doping; Titania nanocrystal; Ultrasound
Web of Science Subject CategoriesChemistry; Chemistry, Applied; CHEMISTRY, APPLIED; Chemistry, Physical; CHEMISTRY, PHYSICAL; Engineering; Engineering, Chemical; ENGINEERING, CHEMICAL

Last updated on 2020-24-10 at 02:19