Synthesis and Structure of a Copper-Based Functional Network for Efficient Organic Dye Adsorption

Abstract

In the work, by incorporating polyoxometalates (POMs) into a copper(II)-based network, a novel three-dimensional (3D) porous framework, [Cu 17 Cl 3 (trz) 12 ]H 3 [GaW 12 O 40 ]•9H 2 O (Cu-GaW-TRZ), was successfully prepared and explored for the adsorption of dyes. The adsorption capacity of Cu-GaW-TRZ was calculated as 13.11 mg/g, and the dye adsorption rate equaled 96.2% for the adsorption of methylene blue (MB). Furthermore, this recyclable adsorbent is stable enough without obvious loss of adsorption capacity for at least five runs. Meanwhile, the structure of the macropores is suitable for the entry of large molecular dyes, and [GaW 12 O 40 ] 5− also can achieve efficient adsorption for cationic dyes. The results displayed a pseudo-second-order kinetic model and were well matched for MB adsorption onto Cu-GaW-TRZ. The free energy, entropy, and enthalpy of the thermodynamic parameters for the adsorption of MB were calculated, which revealed that the adsorption process was befitting for the adsorption of MB.

Four octamolybdate compounds with properties of organic dye adsorption and photocatalytic reduction of Cr(vi)

“…With the development of industry, environmental pollution caused by organic dyes and different heavy metals has aroused widespread concern. Nowadays, there are many related research methods to separate organic dyes from water, including adsorption, 19,20 photocatalysis, 21,22 membrane filtration, 23,24 oxidation, 25 chemical coagulation 26,27 and so on. Among the above methods, adsorption is widely investigated because of its high efficiency, easy operation and economy.…”

Anticancer Drug Extraction from Plasma Samples Using Three-Dimensional Polyoxometalate-Based Supramolecular Frameworks as Sorbents

“…Materials and General Procedures. Without any additional purification, all chemical reagents were used after being purchased commercially except for H 2 PDA and K 5 [BW 12 O 40 ] which were synthesized according to reported procedures. 34,35 Epirubicin-and doxorubicin-hydrochloride were purchased from Sigma-Aldrich.…”

“…Currently, one promising approach for designing such functionalized materials has been proposed, wherein the coordination properties of POMs are combined with various metal–organic coordination compounds to produce crystalline inorganic–organic hybrid structures based on POMs. , In the resulting high-dimensional supramolecular networks or metal–organic frameworks (MOF), POMs are either coordinated to oxophilic metal centers through metal–oxygen coordination bonds or connected as an anionic template via noncovalent interactions. POMs made from inorganic–organic hybrid materials combine the advantages of inorganic POMs with the capabilities of metal–organic elements which make them more valuable for many promising potential applications. − In fact, during the synthesis of these hybrids, it was difficult to control and predict the nuclearity and dimensionality of the resultant architectures. In this regard, the reactants (POMs, metal ions, and organic ligands) must be carefully chosen when constructing inorganic–organic hybrids based on POMs.…”

Structure-induced selective adsorption of diverse dyes and Cr(vi) photoreduction using two new polyoxometalate-based metal–viologen complexes

“…Some POMOCs have been explored and used for the adsorption of dyes by several research groups. [22][23][24][25] Most of the POMOCs rely on pore adsorption or chemical adsorption, and their adsorption efficiency is not excellent. Some POMOCs also possess semiconductor properties, which give them photocatalytic capabilities with adjustable energy levels and electronic characteristics.…”