Quick removal of metronidazole from aqueous solutions using metal–organic frameworks

Abstract

A growing release of antibiotics to the environment has motivated extensive studies on the elimination of these harmful substances and the development of advanced adsorbents. Metronidazole is a major example...

Postsynthetic Modification of NU-1000 for Designing a Polyoxometalate-Containing Nanocomposite with Enhanced Third-Order Nonlinear Optical Performance

“…As a prominent class of crystalline compounds, metal–organic frameworks (MOFs) feature porous structures constructed from metal cations or clusters and organic linking ligands. − This class of materials has attracted a colossal attention in many fields, owing to their structural and chemical tunability, high surface area, controllable morphologies, multiple active sites, adjustable porous structures, and variable chemical functionalities. − Because MOFs can feature π bonding in their structures, the electron transfer between the organic ligands and metals can significantly enhance the NLO effect. − To further improve the NLO performance of these materials, the charge transfer can be tuned by the introduction of strong electron-acceptor/donor groups so that the energy gap can decline by reinforcing the resulting conjugated systems. − Among a variety of MOFs, NU-1000 ([Zr 6 (μ 3 -OH) 4 (μ 3 -O) 4 (OH) 4 (H 2 O) 4 (μ 8 -TBAPy) 2 ], Scheme ) has been regarded as an ideal NLO material because of a diversity of features, which include good stability, high size of pores for postsynthetic modifications, tunable electronic structure with π-conjugated organic linkers, large NLO coefficient, and narrow linear adsorption. − The application of MOFs in the NLO field is, however, accompanied by several limitations such as insufficient thermostability and optical transparency, which can potentially be overcome by blending MOFs with other materials to generate hybrid composites. , …”

Interfacial charge transfer weakens hydrogen bonds between water molecules to accelerate solar water evaporation

“…5g). 40–74 In addition, rGOFpl foam was used to purify the aqueous solution containing the artificial dye Rhodamine B. It was found that the UV vis characteristic peak of Rhodamine B in condensed and collected water at 570 nm disappeared after purification, and the purification efficiency was close to 100% with the color of the solution changing from pink to colorless, as shown in Fig.…”

Current trends in the synthesis, characterization and application of metal-organic frameworks

“…an excellent MNZ adsorption and removal efficiency (above 90%) which was attributed to its unsaturated metal sites, superior specific surface area, hydrogen bonding, and robust host-guest π-π interactions. 156 These studies show a growing trend in the application of MOFs for effective adsorption of antibiotics. 5.1.5 MOFs for water collection and wastewater treatment.…”