Methylene Blue Adsorption by POM based ionic liquid encapsulated ZIF-8
کد مقاله : 1110-INZC6
سارا رنجبری *1، علی آیتی2، مهدی نیکنام3
1مهندسی شیمی، دانشکده فنی مهندسی، دانشگاه صنعتی قوچان، قوچان، ایران
2مهندسی شیمی، دانشکده فنی مهندسی، دانشگاه صنعتی قوچان، ایران
3گروه مهندسی شیمی، دانشکده فنی مهندسی، دانشگاه صنعتی قوچان، قوچان، ایران
چکیده مقاله:
In these years, the ionic liquids (ILs), a kind of eco-friendly salts, have received much attention in various research topics. They generally composed of organic cations and (in)organic anions, which possess fascinating properties [1]. On the other hand, MOFs are new advanced porous crystalline complexes, which consist of various metal ion/clusters and organic ligands. They have unique structures possessing large porosity, high surface area [2], that make them have great potential in different applications, particularly in liquid-phase adsorptive separation, water purification and etc.[2]. In particular, ZIF-8 is a most widely used MOFs, due to its low cost, easily synthesis [3].
The aim of this work is to seek the encapsulation of ZIF-8 with a POM based ionic liquid (BmImBr) to a novel adsorbent for dye removal from aqueous solutions. For this aim, an organic–inorganic hybrid material, consisted of inorganic POMs containing Keggin anion and a cation ILs, was synthesized in ZIF-8. The adsorption performance of ZIF-8-[Bmim]3PW12O40 was studied in removal of methylene blue (MB). The prepared ZIF-8-[Bmim]3PW12O40 was characterized by XRD, FTIR, SEM, EDX and BET analyses, which confirmed the successfully insertion of POM-IL onto the surface of ZIF-8 structure.
It was also revealed that the prepared are efficient adsorbent for the removal of MB from aqueous solution with the removal percentage of 95% within 45 min in the wide pH range of 2-11, in which the removal was increased with increasing of sorbent dosage. Furthermore, it was indicated that the adsorption kinetic of MB onto adsorbent well followed pseudo-first-order.
کلیدواژه ها:
ZIF-8; Ionic Liquid; Polyoxometalate; encapsulation; dye adsorption.
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