TY - JOUR
T1 - Sol-hydrothermal synthesis of inorganic-framework molecularly imprinted TiO2/SiO2 nanocomposite and its preferential photocatalytic degradation towards target contaminant
AU - Deng, Fang
AU - Liu, Yin
AU - Luo, Xubiao
AU - Wu, Shaolin
AU - Luo, Shenglian
AU - Au, Chaktong
AU - Qi, Ruoxi
N1 - Funding Information:
This work was financially supported by Natural Science Foundation of China ( 50978132 , 51178213 , 51238002 , 51272099 , 51308278 , 51368045 ), Program for New Century Excellent Talents in University ( NCET-11-1004 ), Cultivating Program for Young Scientists of Jiangxi Province of China ( 20112BCB23016 ) Natural Science Foundation of Jiangxi Province ( 20122BAB213014 ) and Department of Education Fund of Jiangxi Province ( GJJ13506 ).
PY - 2014/8/15
Y1 - 2014/8/15
N2 - Inorganic-framework molecularly imprinted TiO2/SiO2 nanocomposite (MIP-TiO2/SiO2) was successfully prepared by sol-hydrothermal method using 4-nitrophenol as template. The morphology, structure, optical property, zeta-potential and photocurrent of MIP-TiO2/SiO2 were characterized. The adsorption performance and photocatalytic selectivity were also studied. MIP-TiO2/SiO2 shows higher adsorption capacity and selectivity than the non-imprinted TiO2/SiO2 (NIP-TiO2/SiO2). Kinetics results show that the adsorption equilibrium of 4-nitrophenol on MIP-TiO2/SiO2 is established within 20min, and the adsorption process obeys the pseudo-second-order model. Moreover, MIP-TiO2/SiO2 can completely degrade 4-nitrophenol within 30min, while NIP-TiO2/SiO2 takes 110min. It was found that the MIP-TiO2/SiO2 photocatalyst shows molecular recognition ability, leading to selective adsorption and molecular recognitive photocatalytic degradation of 4-nitrophenol. Furthermore, because of its inorganic framework, MIP-TiO2/SiO2 shows excellent reusability.
AB - Inorganic-framework molecularly imprinted TiO2/SiO2 nanocomposite (MIP-TiO2/SiO2) was successfully prepared by sol-hydrothermal method using 4-nitrophenol as template. The morphology, structure, optical property, zeta-potential and photocurrent of MIP-TiO2/SiO2 were characterized. The adsorption performance and photocatalytic selectivity were also studied. MIP-TiO2/SiO2 shows higher adsorption capacity and selectivity than the non-imprinted TiO2/SiO2 (NIP-TiO2/SiO2). Kinetics results show that the adsorption equilibrium of 4-nitrophenol on MIP-TiO2/SiO2 is established within 20min, and the adsorption process obeys the pseudo-second-order model. Moreover, MIP-TiO2/SiO2 can completely degrade 4-nitrophenol within 30min, while NIP-TiO2/SiO2 takes 110min. It was found that the MIP-TiO2/SiO2 photocatalyst shows molecular recognition ability, leading to selective adsorption and molecular recognitive photocatalytic degradation of 4-nitrophenol. Furthermore, because of its inorganic framework, MIP-TiO2/SiO2 shows excellent reusability.
KW - Molecular recognition
KW - Molecularly imprinted photocatalyst
KW - Photocatalytic ability
KW - Sol-hydrothermal method
UR - http://www.scopus.com/inward/record.url?scp=84902655567&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2014.05.088
DO - 10.1016/j.jhazmat.2014.05.088
M3 - Journal article
C2 - 24953942
AN - SCOPUS:84902655567
SN - 0304-3894
VL - 278
SP - 108
EP - 115
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
ER -