Moreover, the first reduction peak area is 3640 and 2046 for the CuO@SiO2 and CuO/SiO2 (Table 1), respectively, which indicates the presence of much more highly dispersed CuO nanocluster in the hollow CuO@SiO2 that may be conducive to the catalytic activity. The CO-TPR results also ...
FTIR spectra of the Fe3O4@SiO2@Pr-APG catalyst (1) and its components The FTIR spectra of as-prepared Fe3O4@SiO2@PTS-APG nanomaterial (1) and its components containing inorganic and organic moieties have been shown in (Fig.3). The band at 572 cm−1in the spectrum of Fe3O4(blue...
Besides surface roughness, variations in hydrophobic performance partially reflect changes in quantity of hydrophobic groups on its surface as characterized by peak intensities observed on spectrograms. Compared to the ATR-FTIR spectrum of the initial sample, there is a noticeable increase in the ...
The functional groups of Fe3O4@SiO2 and iron-rich sludge samples were identified by FTIR (Figure 1b). The broad peak at 3380 cm−1 reflects the stretching vibration of O-H bonds [28], while the peak that appeared at 1630 cm−1 and 1410 cm−1 were attributed to the C=O and ...
We describe lightweight three-dimensional (3D) graphene hybrid SiO2 aerogels (GSAs) with hierarchically robust interconnected networks fabricated via an in situ deposition procedure after a hydrothermal assembling strategy with graphene oxide sheets. The
Figure 2. (a) FTIR spectrum of SiO2 and P@SiO2 nanoparticles, (b) XRD pattern of SiO2 and P@SiO2 nanoparticles, and EDS analysis of (c) Si-P and (d) P@SiO2-MB and (e) P@SiO2-MB-NaCl powder. The common bands assigned to various vibrations of SiO2 were observed. A broad band...
The TG and FTIR characterizations were performed and the results were shown inFigure A2andFigure A3. The results confirm the formation of SiO2and show that there may be some residual biomass on the microsphere. 3.2. Preparation of Hollow TiO2-SiO2 ...
diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and Brunauer–Emmett–Teller (BET) techniques. The CuO–SiO2nanocomposite was used for potential environmental applications in the terms of its catalytic and photocatalytic activities toward the degradation of rhodamine B (RhB) and Nile ...
(The peak intensity of Q2 and Q3 was the basic catalyst of estimation). The unchanged ratio proves that the number of OH groups did not decrease during the freeze-drying and drying process, thereby retaining the loose structures. 2.3. FTIR Measurements The signal of Q0 (Si(OH)4) was ...
Another peak in the region between 2950 cm−1 and 2800 cm−1 can be related to C–H stretching vibrations. These two bands are characteristics of all polysaccharides. FTIR peaks of alginate, zedo gum and whey protein, alginate-zedo gum, and Alg-WPC-ZG have been represented in Figure 6...