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Synthesis of an inorganic‐framework molecularly imprinted Fe‐doped TiO 2 composite and its selective photo‐Fenton‐like degradation of acid orange II
Author(s) -
Song Yanqun,
Rong Chuan,
Shang Jiaobo,
Wang Yinghui,
Zhang Yuanyuan,
Yu Kefu
Publication year - 2017
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.5199
Subject(s) - catalysis , anatase , methyl orange , adsorption , chemical engineering , photocatalysis , materials science , chemistry , nuclear chemistry , organic chemistry , engineering
BACKGROUND The heterogeneous photo‐Fenton‐like process is emerging as a promising treatment of dye‐containing wastewater because of its economic feasibility and high efficiency. However, it is still required to develop photo‐Fenton‐like catalysts with highly selective degradation ability and reusability. RESULTS Inorganic‐framework molecularly imprinted Fe‐doped TiO 2 composites ( MIP /Fe– TiO 2 ) were successfully prepared by the sol–gel method, with acid orange II as the template and TiO 2 as the matrix material. The photo‐Fenton‐like catalysts were characterized using FESEM , EDS , BET , X‐ray diffraction, FT‐IR spectroscopy and UV –vis diffuse reflectance spectroscopy. These methods revealed the well‐crystallized anatase phase and good nanometer‐level particle sizes. The adsorption property and photo‐Fenton‐like activity of the catalysts were also studied in single and binary systems, respectively. CONCLUSIONS Compared with non‐imprinted Fe– TiO 2 composites ( NIP /Fe– TiO 2 ), MIP /Fe– TiO 2 showed higher adsorption capacity and selectivity toward the template molecule. In addition, it was found that the molecular recognition ability of MIP /Fe– TiO 2 provided the catalysts with rapidly selective photo‐Fenton‐like degradation of low target pollutant levels (20 mg L −1 ) in the presence of high levels of interferential pollutant sodium dodecyl benzene sulfonate (100 mg L −1 ). Moreover, because of the stable physicochemical properties of the inorganic framework, the new photo‐Fenton‐like catalysts were resistant to photochemical attack and showed favorable reusability. © 2017 Society of Chemical Industry