The Fourier transform infrared (FTIR) spectrum demonstrated that the stretching vibration peak for the carbonyl group (C=O) in EGCG shifted from 1691 cm−1 to 1640 cm−1 in MPN@DP-PCs, indicating the presence of strong hydrogen bonds between the EGCG ligands and the PC templates (...
using an Equinox FTIR spectrometer (Bruker, Baltimore, US) operating in a transmission scheme (KBr pellet) to confirm citrate-grafting. Routine magnetometry The variation of the magnetization M as a function of temperature T and as a function of magnetic field H was measured on solid state, ...
The FTIR spectra of GOQDs usually exhibited prominent absorption peaks at 3200–3600 cm−1, relating to O–H stretching, as well as one at 1700 cm−1 Electrochemical oxygen reduction reaction performance In order to evaluate the ORR activity of the prepared FePc-GOQDs composite, CV and ...
The FTIR test results are shown in Fig.3, and the peaks were characterized in Table1. The common peaks in all spectrums (570 cm–1and 3300 cm–1) belongs to Fe–O (Fe3O4) and O–H (H2O). H2O not only absorbs to the surface of the Fe3O4molecule, but also all the surface m...
(N–C), while the N–C peak intensities at Ch.F. are weak (Fig.2A). Mass spectroscopy and NMR (Additional file1: Figs. S52–S57) were employed to investigate these proposed structures, with confirmation from sedimentary tests. The FT-IR spectrum of fresh and reused catalysts reveals the...
The FTIR spectrum images of the prepared hollow structured Fe2O3@MIL-101(Fe)/C magnetic sample and its Fe2O3 precursor are shown in Fig. 2a. The broad absorption peaks from 3432 to 2362 cm−1 are associated with the stretching vibrations of the -OH group of absorbed water molecules...
The characterization of the samples by FTIR (Fourier transform infra-red) and XRD (X-ray diffraction) techniques confirmed the formation of γ-Fe2O3 (maghemite). Analysis by SEM (scanning electron microscope) and TEM (transmission electron microscope) was carried out to study the morphology and...
between PAA and nanoparticles. From the FTIR, R-COO - peak (1582 cm -1 )was observed. It shows the coordination bond was formed between PAA and iron ion on the nano-Fe 3 O 4 surfaces. From the TG, the thermal stability of PAA was improved ...
Signature bands for Fe-O (1136 cm) and organic moieties stretching vibrations were confirmed by FTIR spectrum. The point of zero charge was determined as 7.97 which is concordant with the published value for α-Fe2O3. The thermal stability was ascertained by TGA which showed 28% weight loss...
Subsequently, we performed in-situ ATR-FTIR spectra to monitor the temporal H2O2 concentration variation by the peak intensity of 2843 cm−1 in Fe2O3@FeB/H2O2/Air system (Text. S5 and Fig. S11-12), which agreed well with the temporal H2O2 concentration detection results (Fig. 7d). To...