Defective UiO-66-NH2 (Zr/Ce) catalyzes the synthesis of propylene carbonate under mild conditions

Mixed-Valence Bimetallic Ce/Zr MOF-Based Nanoarchitecture: A Visible-Light-Active Photocatalyst for Ciprofloxacin Degradation and Hydrogen Evolution

“…45 Moreover, the insertion of Ce ions into the UNH framework was accompanied by reduction in BET surface area, as shown in Table S2; however, the reduction in surface area does not affect the photocatalytic performance of the material due to the bimetallic synergistic effect. 42,44 Despite this, the bimetallic MOF's isotherm pattern remained quite similar to that of the parent UNH (Zr) MOF, suggesting retention of the framework structure even with Ce ion insertion. The pore size of the prepared MOFs has also been provided in Table S2, which represents the microporosity in all of the prepared samples.…”

“…The BET adsorption/desorption curve of pristine UNH (Zr) and bimetallic UNH (Ce/Zr) has been presented in Figures d and S3, which resembles a Type-I isotherm showing the presence of framework microporosity . Moreover, the insertion of Ce ions into the UNH framework was accompanied by reduction in BET surface area, as shown in Table S2; however, the reduction in surface area does not affect the photocatalytic performance of the material due to the bimetallic synergistic effect. , Despite this, the bimetallic MOF’s isotherm pattern remained quite similar to that of the parent UNH (Zr) MOF, suggesting retention of the framework structure even with Ce ion insertion. The pore size of the prepared MOFs has also been provided in Table S2, which represents the microporosity in all of the prepared samples. , The detailed BJH pore volume plot has been provided in the insets of Figures d and S3.…”

“…39,40 Moreover, the peaks displayed in Figure 1b show a decrease in peak intensity along with peak broadening with respect to pristine UNH (Zr) for the two prominent Zrcluster peaks, suggesting insertion of Ce ions into the MOF grid and eventually causing a decrease in Zr oxy clusters. 41,42 The PXRD analysis suggests the successful insertion of Ce into the UNH (Zr) grid, paving the way for further studies. The crystallite size and lattice strain of the prepared MOFs have been provided in Table S1.…”

“…This shifting may be attributed to the incorporation of Ce ions, which show an expanded unit cell with larger lattice parameters. Typically, the Ce atoms have a higher ionic radius (Ce 3+ : 1.143 Å > Ce 4+ : 0.97 Å > Zr 4+ : 0.84 Å for coordination number 8) and infiltrate the Zr 6+ cluster, leading to an expanded unit cell, thus resulting in larger lattice parameters. , Moreover, the peaks displayed in Figure b show a decrease in peak intensity along with peak broadening with respect to pristine UNH (Zr) for the two prominent Zr-cluster peaks, suggesting insertion of Ce ions into the MOF grid and eventually causing a decrease in Zr oxy clusters. , The PXRD analysis suggests the successful insertion of Ce into the UNH (Zr) grid, paving the way for further studies. The crystallite size and lattice strain of the prepared MOFs have been provided in Table S1.…”

Organophosphorus-Functionalized Zirconium-Based Metal–Organic Framework Nanostructures for Improved Mechanical and Flame Retardant Polymer Nanocomposites

“…The nitrogen sorption isotherms and pore distributions are shown in Figure 4a,b. The curves in Figure 4a are identified as type I isotherms 39 according to the IUPAC classifications, indicating that both as-synthesized MOF and P-MOF are microporous materials. Further, the curves showcase the adsorption and desorption phenomenon, and the low-pressure hysteresis curve shows that the material has an open porous structure.…”