In this section, you can access to the latest technical information related to the FUTURE project topic.

Two novel Zn (II)?-based metal?organic frameworks for rapidly selective adsorption and efficient photocatalytic degradation of hazardous aromatic dyes in aqueous phase

Two novel Zn-MOFs constructed from 5-hydroxy-2-nitroisophthalic acid (H2DIPA) and 5-(4-carboxy-2-nitrophenoxy)-2-nitroisophthalic acid (H3BPPA), namely: {[Zn2(DIPA)2(bimp)5]?DMF?2H2O}n (Zn-MOF 1), {[Zn2(HBPPA)2(bibp)2]?2H2O}n (Zn-MOF 2) (bimp?=?1,4-di(1H-imidazol-1-yl)butane, bibp?=?4,4?-bis(imidazolyl) biphenyl), have been synthesized under solvothermal conditions and characterized by single crystal X-ray diffraction, elemental analysis, IR spectra, powder X-ray diffraction (PXRD) and thermogravimetric analysis (TG). The single-crystal X-ray diffraction analysis indicates that Zn-MOF 1 exhibits an uncommon 3-nodal framework with a (4?6?8)(4?63?82)(66) topology, whereas Zn-MOF 1 exhibits an uninodal 4-connected framework with a (44?62) topology. Moreover, both of the two Zn-MOFs exhibit exceptional dye adsorption capacities towards the organic dyes with high adsorption rates and excellent adsorption amounts. Particularly, Zn-MOF 1 can selectively adsorb the cationic dye malachite green (MG) whereas Zn-MOF 2 adsorb the anionic dye methyl orange (MO) when there exists another kind of dye in the system. The adsorption process can be illustrated by pseudo-second order kinetic and Langmuir isotherm, and the feasible adsorption mechanism could be the electrostatical interactions, hydrogen bonding between the MOFs and the dyes. Meanwhile, the two Zn-MOFs also show good photocatalytic degradation capabilities toward MB/MV dyes under UV irradiation, and the mechanism studies demonstrate that the main active species are ?OH radicals. Therefore, this functional MOF materials can be treated as a convenient and cost-efficient solution for the sewage handling and environmental protection.

» Author: Ruixue Wu, Xia Zhang, Jinmiao Wang, Lulu Wang, Bin Zhu, Cungang Xu, Guanning Cui, Dongmei Zhang, Yuhua Fan

» More Information

« Go to Technological Watch



AIMPLAS Instituto Tecnológico del Plástico

C/ Gustave Eiffel, 4
(València Parc Tecnològic) - 46980
PATERNA (Valencia) - SPAIN

PHONE

(+34) 96 136 60 40

EMAIL

Project Management department - Sustainability and Industrial Recovery
life-future-project@aimplas.es