Metal–organic frameworks (MOFs) for the efficient removal of contaminants from water: Underlying mechanisms, recent advances, challenges, and future prospects

Reconstruction of Electronic Structure of MOF-525 via Metalloporphyrin for Enhanced Photoelectro-Fenton Process

“…The peaks at 1453 and 1493 cm −1 in MOF-525-Fe/Zr spectra are assigned to the vibration duality of C=O, indicating the enhanced symmetry of the inward and outward tensile vibration of the carboxylic acid group, which can also prove the above viewpoint [27]. Moreover, this π-conjugated structure in carboxylic acid groups also provides a platform to facilitate electron transfer between them in the process of catalytic conversion [45]. In addition, at the high vibration frequency region of MOF-525-Fe/Zr spectrum, the wavelet number shift of the C-N group (817 cm −1 ), C=C group (1326 cm −1 )in the pyrrole ring, and C=C group (1362 cm −1 ), C-C group in the benzene ring (1453 cm −1 ) relative to MOF-525 spectra also provides evidence for the heterogeneity of charge transfer in the porphyrin ring [46].…”

“…Meanwhile, MOF-525-Fe/Zr has a higher degradation efficiency for acidic water in PEF process correspondingly, and the overall degradation efficiency increases and then decreases with the increase of pH. This can be attributed to the fact that when MOF-525-Fe/Zr is suspended in an alkaline solution, the carboxylic acid groups (connector between Zr-oxo SBUs and Fe-TCPP) can be partially polarized [45].…”

Two Cu(i) coordination polymers based on a new benzimidazolyl-tetrazolyl heterotopic ligand for visible-light-driven photocatalytic dye degradation

“…On the other hand, photogenerated holes h + (most likely Cu( ii ) in the current system) may be involved in a Fenton-like Cu I /Cu II redox reaction, which can also efficiently generate ˙OH. 26 ˙OH may promote the degradation reaction of MLB. This mechanism was further confirmed by XPS.…”

“…20,21 Recently, much attention has been given to the use of coordination polymers as visible-light-driven photocatalysts, mainly because their electronic structure can be easily regulated by metal ions and ligands. [22][23][24][25][26][27][28] Previous reports indicate that copper-based CPs usually have rich photophysical properties and exhibit photocatalytic functions towards organic and inorganic contaminants. [29][30][31][32][33] Inspired by this and our continuous studies on heterotopic triangular ligands, 15,16,[34][35][36]…”

Loosely Sandwich-Structured Membranes Decorated with UiO-66-NH2 for Efficient Antibiotic Separation and Organic Solvent Resistance

“…Given the fluoroquinolone antibiotics (FQs) have been extensively detected in the natural water system and secondary-treated wastewater plants, − it is imperative to adequately remove them because of their teratogenic, carcinogenic, and mutagenic effects . The membrane-based wastewater reclamation technique is promising energy conservation and environmental protection, in accordance with the requirement of society’s sustainable development and the goal of emission peaks and carbon neutrality, , like other advanced technologies (e.g., photocatalysis, , electrodialysis, and biocatalysis). Thereinto, nanofiltration (NF) has great advantages of a continuous operation process, customary interception efficiency, and inferior power consumption. − It is expected to be applied in modern wastewater reclamation plants to remove trace and refractory FQs.…”