Functionalized UiO-66(Ce) for photocatalytic organic transformation: the role of active sites modulated by ligand functionalization

Abstract

Ligand functionalization has been considered as an efficient strategy to modulate the property of metal-organic frameworks (MOFs). In this work, a series of functionalized UiO-66(Ce)-X (X=H, CH3, Br, NO2) have...

Oxygen-powered flower-like FeMo6@CeO2 self-cascade nanozymes: a turn-on enhancement fluorescence sensor

“…22 Both FC-66 and FMC-1 exhibit typical peaks at 1556 and 1434 cm À1 for the stretching vibrations V assy (-COO-) and V sym (-COO-) of carboxylate in H 2 BDC, respectively. 23 With increasing calcination time, the characteristic peaks of the carboxylate for FMC-2 and FMC-3 disappear, and is consistent with the XRD results. Since specific surface area (SSA) is one of the important factors to influence the mimetic enzyme performance, N 2 adsorption measurements at 77 K were used to characterize the pore size distribution and Brunauer-Emmett-Teller specific surface area (S BET ) values of FMC-n. As shown in Fig.…”

“…22 Both FC-66 and FMC-1 exhibit typical peaks at 1556 and 1434 cm −1 for the stretching vibrations V assy (–COO–) and V sym (–COO–) of carboxylate in H 2 BDC, respectively. 23 With increasing calcination time, the characteristic peaks of the carboxylate for FMC-2 and FMC-3 disappear, and is consistent with the XRD results.…”

Metal–organic-framework-based photocatalysts for microorganism inactivation: a review

“…They found that UiO-66(Ce) modified by CH 3 possesses stronger Lewis acid sites, which can generate more free radicals to degrade pollutants. 35 Integration with semiconductors is another effective strategy to build functional MOFs for sterilization. On the one hand, the high surface area ratio of MOFs is conducive to producing more catalytic sites and forming better contact between the reactors and the active sites.…”

“…They found that UiO-66(Ce) modified by CH 3 possesses stronger Lewis acid sites, which can generate more free radicals to degrade pollutants. 35…”

“…In addition, pure MOFs often suffer from rapid recombination of photogenerated electron-hole pairs, resulting in suboptimal photocatalytic performance. In order to solve the above problems and obtain better photocatalytic performance, functionalized MOF-based composites can be constructed by modifying pure MOFs, such as the decoration of linkers or metal centers, 35 metal nanoparticle (NP) doping, 36 construction of core-shell materials, 26 and bonding with semiconductors 37 and conductive materials. 38 These are very promising strategies to realize the visible light response of MOFs and enhance the photocatalytic performance of MOFs.…”