Effect of incorporating different ZIF-8 crystal sizes in the polymer of intrinsic microporosity, PIM-1, for CO2/CH4 separation

Ultrafast Poly(sodium methacrylate)-Grafted UiO-66-Incorporated Nanocomposite Membranes Enable Excellent Active Pharmaceutical Ingredient Concentration

“…The Fourier transform infrared (FTIR) spectroscopy was applied to investigate the chemical composition of the nanoparticles to prove the successful grafting of SPA chains on the nanoparticles. The peaks at 1652, 1443, and 1392 cm –1 correspond to the N–H bending vibration, C–H bending vibration, and C–N stretching vibration, respectively (Figure b), indicating that UiO-66-NH 2 is successfully synthesized. − The peak around 1652 cm –1 of UiO-66-NH 2 that belongs to the CO vibration shifted to 1692 cm –1 after the reaction between UiO-66-NH 2 and BiBB, confirming the formation of UiO-66-Br. , After grafting with the SPA chains, the peak intensities of the nanoparticles at 1567 and 1392 cm –1 were significantly reduced, which may be due to the fact that SPA chains do not contain N element. Notably, the grafting of SPA chains did not damage the chemical structure of UiO-66, which was proved by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) characterizations in our previous work …”

“…41−43 The peak around 1652 cm −1 of UiO-66-NH 2 that belongs to the CO vibration shifted to 1692 cm −1 after the reaction between UiO-66-NH 2 and BiBB, confirming the formation of UiO-66-Br. 44,45 After grafting with the SPA chains, the peak intensities of the nanoparticles at 1567 and 1392 cm −1 were significantly reduced, which may be due to the fact that SPA chains do not contain N element. Notably, the grafting of SPA chains did not damage the chemical structure of UiO-66, which was proved by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) characterizations in our previous work.…”

A Highly Permeable Mixed Matrix Membrane Containing a Vertically Aligned Metal–Organic Framework for CO2 Separation

“…The C−N stretching and bending are observed at 993 and 1146 cm −1 , respectively. 45 When the V-ZIF-8 was covered by PSF, the characteristic peaks of PSF are present at 1101cm −1 (SO 2 stretching), 1146 cm −1 (O−C stretching), 1486 cm −1 (CC stretching), and 1583 cm −1 (CC stretching). 46 In addition, the characteristic peak of ZIF-8 can be observed in the spectra of the V-ZIF-8/PSF membrane.…”

“…The absorption spectra at 758 and 688 cm –1 belong to the aromatic sp 2 C–H bending. The C–N stretching and bending are observed at 993 and 1146 cm –1 , respectively . When the V-ZIF-8 was covered by PSF, the characteristic peaks of PSF are present at 1101cm –1 (SO 2 stretching), 1146 cm –1 (O–C stretching), 1486 cm –1 (CC stretching), and 1583 cm –1 (CC stretching) .…”

Novel Mixed Matrix Membranes Based on Polymer of Intrinsic Microporosity PIM-1 Modified with Metal-Organic Frameworks for Removal of Heavy Metal Ions and Food Dyes by Nanofiltration

“…The characteristic peaks are presented in the IR spectra of PIM-1. The peak at 2240 cm −1 indicates the stretching of the nitrile group, the peak at 2800-2900 cm −1 corresponds to -C-H [72], the peak at 1702 cm −1 corresponds to C=N [73], the peak at 1446 cm -1 corresponds to -CH bonds from the C-CH 3 and -CH 2 groups [53], and the group of peaks at 1250-1350 cm −1 corresponds to the stretching of the -C-O-bond [72]. The introduction of MOFs into the PIM-1 matrix leads to small changes in the IR spectra: insignificant displacements of the peaks and changes in their intensity occur, which may indicate an overlapping of the characteristic MOFs peaks with the peaks for PIM-1.…”