期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 346, 期 -, 页码 113-123出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2017.12.032
关键词
Molecular imprinting; Photocatalysis; Thiol-functionalized TiO2; Synthesis; 2, 4-Dinitrophenol
资金
- National Natural Science Foundation of China [51779090, 51408206, 41601272, 51579098, 51709101, 51278176, 51521006]
- Hunan Provincial Science and Technology Plan Project [2017SK2243, 2016RS3026]
- National Program for Support of Top-Notch Young Professionals of China
- Program for Changjiang Scholars and Innovative Research Team in University [IRT-13R17]
- Fundamental Research Funds for the Central Universities [531107050978, 531107051080]
A novel water-compatible surface molecularly imprinted thiol-functionalized titanium dioxide (TiO2) material (CMIP-coated TiO2) was prepared in water, using 2, 4-dinitrophenol (2, 4-DNP) as template molecule and o-phenylenediamine (OPDA) as both functional monomer and cross-linker. The as synthesized materials were characterized by FESEM, FT1R, XRD, BET and UV-vis DRS. Moreover, we have investigated the adsorption capacity, adsorption selectivity and photodegradation activity of the CMIPcoated TiO2 and non-molecular imprinted materials (CNIP-coated TiO2). Additionally, the effects of pH and concentration of 2, 4-DNP on the degradation rate of 2, 4-DNP were also investigated. Results showed that CMIP-coated TiO2 exhibited higher adsorption capacity, greater selectivity and faster photodegradation activity for 2, 4-DNP compared with the CNIP-coated TiO2. Meanwhile, the specific selectivity to 2, 4-DNP over its structural analogue 4-nitrophenol (4-NP) and the enhanced photodegradation capacity were mainly attributed to the imprinted cavities on the surface of CMIP-coated TiO2. Taking advantage of efficient removal capacity, high reusability and no-additional chemicals in imprinted process, the prepared materials can be potentially applied to green removal of 2, 4-DNP in wastewater. (C) 2017 Elsevier B.V. All rights reserved.
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