Influence of various Cu/Fe ratios on the surface properties of green synthesized Cu-Fe-BTC and it`s relation to methylene blue adsorption

A novel bimetallic MOFs combined with gold nanoflakes in electrochemical sensor for measuring bisphenol A

“…1C ) were classified as lattice oxygen in the metal–oxygen bond (Fe–O or Cu–O), chemisorbed oxygen species, and oxygen in carboxyl groups, respectively. 44 The binding energies at 712.05 eV and 724.87 eV in the Fe2p-XPS spectra ( Fig. 1D ) were assigned to Fe 2+ , while the peaks at 714.39 and 727.29 eV were attributed to Fe 3+ and two satellites rocking at 719.04 and 731.73 eV (denoted sat.).…”

“…1B) characterized for the bond energies of C]C/C-C, C-O, C= O and O-C]O, respectively 42. Three peaks at 531.51 eV, 532.43 eV and 533.84 eV observed in the highresolution O1s-XPS spectra (Fig.1C) were classied as lattice oxygen in the metal-oxygen bond (Fe-O or Cu-O), chemisorbed oxygen species, and oxygen in carboxyl groups, respectively 44.…”

Synergistic combination: Promising nanoplatform W‐POM NCs@ HKUST‐1 for photothermal and chemodynamic reinforced anti‐tumor therapy

“…Figure 2a shows the IR spectra of H 3 BTC, W‐POM NCs and W‐POM NCs@HKUST‐1, reflecting that HKUST‐1 successfully wrapped W‐POM NCs, where the characteristic peak at 3448 cm −1 is due to the stretching vibration of ‐OH group. By comparison, the peaks due to the antisymmetric stretching vibration and symmetric stretching vibration of ‐COOH group in the IR spectrum of H 3 BTC are at 1615 cm −1 and 1380 cm −1 , while in the spectrum of W‐POM NCs@HKUST‐1, these two sets of peaks appear at 1615 and 1366 cm −1 , indicating that the ‐COOH group in H 3 BTC is coordinated with Cu 2+ successfully, [ 31 ] which proved the generation of the pure phase of W‐POM NCs@HKUST‐1. In addition, the characteristic peaks of W‐POM NCs@HKUST‐1 in the IR spectrum are essentially the same as those of HKUST‐1, except for the C=O group stretching vibration originating from W‐POM NCs at 1716 cm −1 , which indicates the successful embedding of W‐POM NCs into HKUST‐1.…”

Copper(II)-Doped Two-Dimensional Titanium-Based Metal–Organic Frameworks toward Light-Driven CO2Reduction to Value-Added Products

“…Figure a,b shows the FTIR spectra of H 3 BTC (organic ligand), pure TM1, and T1- x Cu. The absorption peak at around 1709 cm –1 (light-blue area in Figure b) was attributed to the vibration absorption of carboxylic acid; the absorption band ranging from 1800 to 1200 cm –1 (light-purple area in Figure b) was assigned to the vibration absorption of −CO 2 – and the benzene ring skeleton of H 3 BTC, and it exhibited characteristic metal–carboxyl coordination vibration, and the absorption signal in the range of 800–600 cm –1 (light-green area in Figure b) belonged to the vibration absorption of Ti–O–Ti. ,− Moreover, compared to H 3 BTC, the intensity of the peak at 1709 cm –1 was obviously weakened and the intensity of the absorption band at 1800–1200 cm –1 was increased for MOF-related samples (TM1 and T1- x Cu), which revealed that H 3 BTC was deprotonated and coordinated with the metal center to form a secondary building unit. , Taking T1-2Cu as an example, the absorption band of 3000–2500 cm –1 (light-orange area in Figure S4) was attributed to the vibration absorption peaks of O–H and C–H. , According to the FTIR characterization results, the FTIR spectra of Cu 2+ -doped samples were consistent with those of pure TM1, and no additional impurity peaks belonged to Cu-based species, suggesting that the additional Cu 2+ ions were not self-nucleated alone in the reaction system but well doped in the crystal structure of TM1. Furthermore, the inference based on FTIR analysis agreed with the conclusion based on the XRD measurement.…”

“…30,36−39 Moreover, compared to H 3 BTC, the intensity of the peak at 1709 cm −1 was obviously weakened and the intensity of the absorption band at 1800−1200 cm −1 was increased for MOF-related samples (TM1 and T1-xCu), which revealed that H 3 BTC was deprotonated and coordinated with the metal center to form a secondary building unit. 38,40 Taking T1-2Cu as an example, the absorption band of 3000−2500 cm −1 (light-orange area in Figure S4) was attributed to the vibration absorption peaks of O−H and C−H. 37,39 According to the FTIR characterization results, the FTIR spectra of Cu 2+ -doped samples were consistent with those of pure TM1, and no additional impurity peaks belonged to Cu-based species, suggesting that the additional Cu 2+ ions were not self-nucleated alone in the reaction system but well doped in the crystal structure of TM1.…”