A porous Ti-based metal–organic framework for CO₂photoreduction and imidazole-dependent anhydrous proton conduction

Abstract

Anhydrous proton conductivity of Im@IEF-11 resulting from the integration of imidazole and porous IEF-11 has been investigated, and the highest proton conductive value can reach up to 7.64 × 10-2...

Construction of Zr-Metal–Organic Frameworks-Based Composite Materials toward Anhydrous Proton Conduction and Photocatalytic CO2 Reduction

“…The characteristic absorption peaks of Im@ZrSQU (Figure S1b) and Cu@ZrSQU (Figure S2b) at 641 and 761 cm –1 originate from the stretching vibration of the Zr–O bond, which is the characteristic structure of ZrSQU. The characteristic peaks in the spectra of Im@ZrSQU at 1062 and 1323 cm –1 are from the stretching vibration of C–N in Im, and the absorption peak at 1602 cm –1 is from the stretching vibration of CN in Im . The results indicate that the Im molecules have been successfully loaded into the pores of ZrSQU.…”

“…The XPS spectra of Im@ZrSQU-200 (Figure S8a) and Cu@ZrSQU-90 (Figure S8b) confirmed that Im@ZrSQU-200 contains C, O, Zr, and N elements, and Cu@ZrSQU-90 contains C, O, Zr, and Cu elements, respectively. In Im@ZrSQU-200, the high-resolution C 1s XPS spectra (Figure S9a) showed three main peaks, which are characteristic signals of square ligands in ZrSQU with characteristic peaks at binding energies of 283.2, 284.6, and 287.1 eV, corresponding to the presence of C–C, C–O, and CO, respectively . The signal at 530.1 eV in the high-resolution O 1s XPS spectrum (Figure S9b) corresponds to the Zr–O bond in ZrSQU, and the other two signals are from the C–O and CO bonds .…”

“…The characteristic peaks in the spectra of Im@ZrSQU at 1062 and 1323 cm −1 are from the stretching vibration of C− N in Im, and the absorption peak at 1602 cm −1 is from the stretching vibration of C�N in Im. 31 The results indicate that the Im molecules have been successfully loaded into the pores of ZrSQU. The spectrum of Cu@ZrSQU shows a broadband of 1923−2017 cm −1 compared to the curve of the parent ZrSQU, which is due to the introduction of Cu.…”

“…In Im@ZrSQU-200, the high-resolution C 1s XPS spectra (Figure S9a) showed three main peaks, which are characteristic signals of square ligands in ZrSQU with characteristic peaks at binding energies of 283.2, 284.6, and 287.1 eV, corresponding to the presence of C−C, C−O, and C�O, respectively. 31 The signal at 530.1 eV in the high-resolution O 1s XPS spectrum (Figure S9b) corresponds to the Zr−O bond in ZrSQU, and the other two signals are from the C−O and C�O bonds. 33 According to the high-resolution XPS of Zr 3d (Figure S9c), the two peaks at 181 and 183.4 eV should belong to Zr 3d 5/2 and Zr 3d 3/2 , respectively, which are representative structures of ZrSQU.…”

“…31 In Cu@ZrSQU-90, the high-resolution C 1s XPS spectrum (Figure S10a) shows three main peaks corresponding to the characteristic signals of the square ligands, namely C−C (283.7 eV), C−O (285.5 eV), and C�O (287.8 eV). 31 The high-resolution O 1s XPS spectrum (Figure S10b) shows the signal of Zr−O (530.7 eV). 33 High-resolution Zr 3d XPS (Figure S10c) shows representative structures of ZrSQU, Zr 3d 5/2 (181.7 eV), and Zr 3d 3/2 (184.1 eV).…”