Preparation of a Series of Pd@UIO-66 by a Double-Solvent Method and Its Catalytic Performance for Toluene Oxidation

Abstract

This paper reports on the preparation, characterization, and catalytic properties of the Pd@UIO-66 for toluene oxidation. The samples are prepared by the double-solvent method to form catalysts with large specific surface area, highly dispersed Pd0 (Elemental palladium) and abundant adsorbed oxygen, which are characterized by X-ray Photoelectron Spectroscopy (XPS), Brunauer-Emmett-Teller (BET) and Transmission Electron Microscopy (TEM). The results show that as the Pd content increases, the adsorbed oxygen content further increases, but at the same time Pd0 will agglomerate and lose some active sites, which will affect its catalytic performance. While 0.2%Pd@UIO-66 has the highest concentration of Pd0, the result shows it has the best catalytic activity and the T90 temperature is 210 °C.

Au Quantum Clusters and Plasmonic Quantum Nanoparticles Synthesized under Femtosecond-Pulse Laser Irradiation in Aqueous Solution and in ZIF-8 for Catalytic Reduction of 4-Nitrophenol

“…40 Moreover, Pd@UiO-66 was also prepared by the double-solvent method. 41 5a exhibits the smooth and uniform hexagonal ZIF-8 with a particle size ranging 80−100 nm, showing good agreement with previous reports. 42 The structure of ZIF-8 after laser treatment did not change from the pristine ZIF-8 (Figure 5b).…”

“…The major corresponding peaks of ZIF-8 were (011), (002), ( 112), ( 022), (013), and (222) planes at the diffraction peaks of 7.39, 10.43, 12.82, 14.77, 16.51, and 18.10°, respectively, which are similar to those reported in the literature. 41 The XRD pattern of Au@ ZIF-8 provided the presence of Au crystal peaks at 2θ of 38.44 and 44.64°assigned to (111) and (200) planes, respectively, besides XRD peaks of ZIF-8. 44 Nitrogen adsorption−desorption isotherms of pristine ZIF-8 and Au@ZIF-8 were investigated by BET measurements.…”

Fabrication of UiO-66/MIL-101(Fe) binary MOF/carboxylated-GO composite for adsorptive removal of methylene blue dye from aqueous solutions

“…2C) shows a peak at 486 cm À1 which is ascribed to the vibration mode of Zr-O, while the peak at 549 cm À1 is assigned to Fe-O vibration. 44 The peaks at 737 and 862 cm À1 are related to the bending vibration of aromatic C-H of benzene ring and the peak at 1120 cm À1 is attributed to C-C bond. Additionally, the symmetric stretching band at 1390 cm À1 and the two asymmetric stretching bands at 1525 and 1691 cm À1 are corresponding to carboxyl group.…”

Abatement of Toluene Using a Sequential Adsorption-Catalytic Oxidation Process: Comparative Study of Potential Adsorbent/Catalytic Materials

“…UiO-66-SO 3 H (UiO: University of Oslo) is a metal organic frameworks (MOF) isostructural with UiO-66 and can be synthesized easily via a direct solvothermal approach [18]. MOFs exhibit tunable structures, large surface areas and multifunctional properties which have attracted increasing attention in various applications such as adsorption [19], catalytic oxidation [20,21], and photocatalysis [22]. MOFs might be considered as a potential alternative to zeolites and active carbons in adsorption technologies.…”