TY - JOUR
T1 - A study on the synergistic adsorptive and photocatalytic activities of TiO2-xNx/Beta composite catalysts under visible light irradiation
AU - Shen, Qun
AU - Zhang, Wei
AU - Hao, Zhengping
AU - Zou, Linda
N1 - Funding Information:
The authors acknowledge strategic research funding from University of South Australia . Thanks are also for the help in instrumental analysis conducted by Dr Andrew Michelmore at Mawson Institute, University of South Australia. The support from National Natural Science Foundation of China (20725723, 20703057) and National Basic Research Program of China (2004CB719500) are also appreciated.
PY - 2010/11/15
Y1 - 2010/11/15
N2 - A series of TiO2-xNx/Beta composite samples were prepared by coating the nitrogen-doped titania on the Beta zeolite using a simple sol-gel method. Samples were characterized by nitrogen adsorption-desorption, XRD, TEM, UV-vis, XPS and FTIR techniques. The photocatalytic activities were evaluated by the degradation of methylene blue under visible light irradiation. The synergistic effect between absorption and photocatalysis of the TiO2-xNx/Beta composite materials was found in terms of methylene blue removal efficiency under visible light irradiation, since the assisting adsorption ability from H-Beta zeolite could supply a concentrated pollutant environment around titania active sites. The highest photocatalytic efficiency was obtained on the 10% TiO2-xNx-coated composite sample, which was probably due to the better dispersion of titania on the support. Furthermore, the TiO2-xNx/Beta-10% catalyst was consistent to be the most efficient composite material tested for the photocatalytic degradation of methylene blue even in different pH environment.
AB - A series of TiO2-xNx/Beta composite samples were prepared by coating the nitrogen-doped titania on the Beta zeolite using a simple sol-gel method. Samples were characterized by nitrogen adsorption-desorption, XRD, TEM, UV-vis, XPS and FTIR techniques. The photocatalytic activities were evaluated by the degradation of methylene blue under visible light irradiation. The synergistic effect between absorption and photocatalysis of the TiO2-xNx/Beta composite materials was found in terms of methylene blue removal efficiency under visible light irradiation, since the assisting adsorption ability from H-Beta zeolite could supply a concentrated pollutant environment around titania active sites. The highest photocatalytic efficiency was obtained on the 10% TiO2-xNx-coated composite sample, which was probably due to the better dispersion of titania on the support. Furthermore, the TiO2-xNx/Beta-10% catalyst was consistent to be the most efficient composite material tested for the photocatalytic degradation of methylene blue even in different pH environment.
KW - Beta zeolite
KW - Composite
KW - Nitrogen-doped titania
KW - Photodegradation
KW - Visible light irradiation
UR - http://www.scopus.com/inward/record.url?scp=78149498204&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2010.08.057
DO - 10.1016/j.cej.2010.08.057
M3 - Article
AN - SCOPUS:78149498204
SN - 1385-8947
VL - 165
SP - 301
EP - 309
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
IS - 1
ER -