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

doi:10.1016/S1872-2067(12)60578-6

Chinese Journal of Catalysis ›› 2013, Vol. 34 ›› Issue (6): 1250-1255.DOI: 10.1016/S1872-2067(12)60578-6

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

ZHOU Wanqin^a, YU Changlin^b, FAN Qizhe^b, WEI Longfu^b, CHEN Jianchai^b, YU Jimmy C^c

a School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China;
b School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China;
c Department of Chemistry, The Chinese University of Hong Kong, Hong Kong, China

Received:2013-01-18 Revised:2013-03-15 Online:2013-06-07 Published:2013-06-09
Supported by:
This work was supported by the National Natural Science Foundation of China (21067004, 21263005), the Science and Technology Project of the Education Department of Jiangxi Province (GJJ12344), the Young Scientists Cultivating Program of Jiangxi Province (20122BCB23015), and the China Scholarship Council (2011836054).

Abstract

Abstract:

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 N₂ 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.

Key words: Nitrogen doping, Ethylene diamine, Titania nanocrystal, Ultrasound, Dimethyl phthalate

ZHOU Wanqin, YU Changlin, FAN Qizhe, WEI Longfu, CHEN Jianchai, YU Jimmy C. Ultrasonic fabrication of N-doped TiO₂ nanocrystals with mesoporous structure and enhanced visible light photocatalytic activity[J]. Chinese Journal of Catalysis, 2013, 34(6): 1250-1255.

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

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