Postsynthesis of Titanium Incorporated With Amino-Functionalization Uio-66 for Enhancing Co2 Uptake

Abstract

Metal-organic frameworks (MOFs) are promising nanomaterials with unprecedented capacity to store small molecules. Titanium cooperated with NH 2-UiO-66 were prepared via post synthesis modifications approach and their structures and properties were characterized by X-raydiffraction,Fourier transform infrared spectroscopy, thermogravimetric analysis, nitrogen adsorption isotherms, and scanning electron microscopy. The resultant titanium cooperated with NH 2-UiO-66 showed excellent performance for CO 2 adsorption via the formation of oxo-bridged hetero-Zr-Ti clusters. This result clearly demonstrates that the smaller Ti ions exchanged with the Zr ions of NH 2-UiO-66 may decrease the pore sizes within the framework to be closer to the ideal pore sizes for CO 2 adsorption.

Defect-Tailoring and Titanium Substitution in Metal–Organic Framework UiO-66-NH2 for the Photocatalytic Degradation of Cr(VI) to Cr(III)

“…All samples show similar peaks in general, and the incorporation of Ti into UiO-66-NH 2 cannot be observed from the FTIR spectrum. The double peaks at 3490 and 3346 cm –1 are assigned to the stretching vibration adsorption of the amine groups, whereas the peaks in the region of 1250–1580 cm –1 are associated with the CC, C–O, and OCO groups in organic linkers. , The peaks between 480 and 680 cm –1 are ascribed to Zr-μ 3 -O and Zr-μ 3 -OH in Zr 6 clusters, and the peaks between 660 and 970 cm –1 indicate the bending and twisting of the Zr nodes. , …”

“…35,36 The peaks between 480 and 680 cm −1 are ascribed to Zr-μ 3 -O and Zr-μ 3 -OH in Zr 6 clusters, and the peaks between 660 and 970 cm −1 indicate the bending and twisting of the Zr nodes. 36,37 In order to detect the chemical changes in the element surroundings and to prove whether Ti atoms were successfully incorporated into the framework, X-ray photoelectron spectroscopy analyses were performed. From the XPS survey spectra (Figure 2a), peaks indicating Zr 3d, Zr 3p, C 1s, O 1s, and N 1s are shown in all four samples.…”

Surface Modification of UiO-66 on Hollow Fibre Membrane for Membrane Distillation

“…The fitting peaks of F1S spectra appear at 686.4 and 688.7 eV for C–F semi-ionic bond and C–F covalent bond, respectively [ 61 ]. Meanwhile, the deconvolution of Zr3d spectra resulted in four peaks associated to Zr–O–C, Zr–O, Zr 3d 5/2 , and Zr 3d 3/2 located in the range of ~181.0 to ~185.0 eV [ 63 , 64 ]. The spectra showed that Zr element exists in the form of Zr 4+ based on the Zr 3d 3/2 and 3d 5/2 peak analysis [ 65 , 66 ].…”

Bimetallic UiO‐66(Zr/Ti)‐Ionic Liquid Grafted Fillers with Intensified Lewis Acidity for High‐Performance Composite Solid Electrolytes

“…[ 36 ] The Ti 2p signals are observed at 458.7 and 464.5 eV, corresponding to Ti 2p 3/2 and Ti 2p 1/2 , respectively. [ 37 ] The N 1s spectrum exhibits deconvolution peaks at 399.3, 400.9, and 401.6 eV, which can be attributed to N─S, C─N, and C═N, respectively. [ 38 ] Additionally, Fourier transform infrared spectroscopy (FT‐IR) spectra and 1H‐nuclear magnetic resonance (1H‐NMR) provide further evidence of the ionic liquid grafting onto BUIL (Figures S5 and S6, Supporting Information).…”