What triggers dye adsorption by metal organic frameworks? The current perspectives

Abstract

<p>The coordination chemistry has always been the most important tool to envisage the material importance of metal-organic systems. The chemistry involved plays a key role in determining structural features which...</p>

Recent Improvement Strategies on Metal-Organic Frameworks as Adsorbent, Catalyst, and Membrane for Wastewater Treatment

“…However, the ideal adsorbents not only have high adsorption capacity, but also high adsorption selectivity of the persistent organic pollutants [34,35]. In this context, MOFs are promising alternative adsorbents due to their extraordinary high surface area (up to 7000 m 2 /g [25]), high adsorption capacity, ability to bind various organic pollutant, and adsorption selectivity [7,55,56]. Haque et al shown that MIL-101(Cr) has higher methyl orange (MO) adsorption capacity (114.0 mg/g) than AC (11.2 mg/g), due to surface area of MIL-101(Cr) (3873 m 2 /g) is significantly higher than AC (1068 m 2 /g) [57].…”

“…Various methods have been extensively employed for the POPs removal in wastewater such as flocculation/coagulation [6], adsorption [5,7], photocatalytic [8,9], Fenton-like catalysts [10,11], membrane separation [12,13], and reverse osmosis [14]. Among these methods, adsorption, catalytic degradation, and membrane separation are promising techniques for eliminating harmful pollutants from wastewater due to their low cost and simple process [13,15,16].…”

Fluorinated Iron(ii) clathrochelate units in metalorganic based copolymers: improved porosity, iodine uptake, and dye adsorption properties

“…The former is an important reagent for various biological and industrial applications whereas the latter is considered to be a primary source of pollution in water resources. 8,[66][67][68][69] The capacity of CCP1-5 to adsorb MB and MEB was investigated by stirring at ambient temperature a 4 mg sample of a target copolymer in a 5 mL of a 5 mg L À1 aqueous solution of either MB or MEB dyes. The adsorption tests were performed by recording the UV-visible absorbance spectra at different time intervals (Fig.…”

Efficient Removal of Chromium(VI) Anionic Species and Dye Anions from Water Using MOF-808 Materials Synthesized with the Assistance of Formic Acid

“…At the same time, some silica-based materials and inorganic composites can capture oxometallates well, but perform poorly in removing organic dyes [12]. Besides, high stability and facile recyclability of the materials in water are also important demands [6,13,14]. Introducing new materials as environmentally friendly and efficient adsorbents to remove oxometallates and anionic dyes from aqueous solutions is therefore highly essential [15].…”

“…Apart from having the common characteristic of the MOF family, such as a large specific surface area and structural and chemical tunability, their outstanding performances derive from the defect positions, which are the open acidic sites (uncoordinated Zr-sites) [18,19]. Along with high hydrolytic stability, these positively charged sites in frameworks provide an ideal platform for capturing anions in water media [3,13,20]. In several recent reports, UiO-66 and its derivatives, which are typically 12-connected Zr-nets (MOFs with coordinatively saturated Zr-clusters), were widely employed to efficiently remove dichromate ions from aqueous media [21][22][23].…”