Therefore, Fourier-transform infrared (FTIR) spectroscopy was employed to analyze the MIP, NIP, and amino-functionalized SiO2 particles. As illustrated in Fig. 3n, the characteristic peak at 3470 cm⁻1 indicates the presence of unstable hydroxyl groups (–OH) on the surface of SiO2. The ...
Crystal structure, thermal stability, pore structure, and chemical composition of the SiC@SiO2NFA.aXRD patterns,bFTIR spectra,cRaman spectra, anddTGA curves,eN2adsorption/desorption isotherms and corresponding adsorption pore size distribution (inset),fXPS survey spectrum and high-resolutiongSi 2p,hC ...
Furthermore, the C = O stretching peak for pure SA, corresponding to a signal at 1696 cm−1 and having a relatively weaker transmittance represents conjugate acids. Fig. 7 FTIR of a SA modification on PHBV fibers; b PHBV/SiO2 composite fibers and c synergic effect of SiO2 ...
FTIR: Fourier-transform infrared spectroscopy GoF: Goodness of fit HRM: Hot Rolling Mill ICDD: International Centre for Diffraction Data l-RHA: Leached rice husk ash PPM: Parts Per Million RH: Rice Husk RHA: Rice Husk Ash ROT: Run-out Table SDS: Sodium dodecyl sulfate SS: ...
Fig. 5a–d shows the ATR-FTIR spectra for the hydrogel constructs immersed in SBF for different durations. In the figures, there is a sharp, intensive dip at 1026 cm−1 and a shoulder at 960 cm−1. Both are exclusively attributed to the presence of hydroxyapatite [34]. The double ...
s [56] Although quartz has not been detected by XRD diffractograms, we might assume its presence in a very slow amount taking into consideration that the peak and shoulder at 1080 cm−1 and 1220 cm−1, respectively, as well as the peak around 570 cm−1 in the FTIR spectra (Fig...
Table 3. The calculated shell-to-core ratio of five nano-SiO2@PCE based on TGA results. No.1#2#3#4#5# Shell-to-core ratio 5.38 7.69 10.11 18.07 26.13 The FTIR spectra of pristine nano-SiO2 and 5# nano-SiO2@PCE are shown in Fig. 3. Since all the modified nano-SiO2 samples posse...
. Higher reaction temperatures lead to larger amounts of H/D exchange, consistent with a larger number of M–H sites and higher rates (Supplementary Fig.8, Supplementary Table9). In situ IR for Ga/SiO2also provides evidence for the heterolytic dissociation of H2. The peak at 3745 cm...
Fourier transformed infrared spectroscopy (FT-IR): FT-IR spectra were acquired in the range of 4000 to 400 cm−1, with a resolution of 4, and a total of 100 scans using a Nicolet IS5 system with OMNIC FTIR Software (9.2.86 version). The materials were dispersed in KBr pellets. Raman...
The prepared nanocomposites of the chemical structure were studied using a PerkinElmer FTIR spectrometer. The surface area of the samples was measured via N2 adsorption-desorption isotherms at 77 K (BET, Micromeritics ASAP 2020, Norcross, GA, USA). PL studies were observed using a PL spectrometer...