FTIR peaks of ZnO-PMMA nanocomposite thin films were observed at 540 cm for Zn–O bond and at 1766 cm for ester carbonyl CO stretch vibration of PMMA. The bandgap of ZnO-PMMA thin films was observed to be lower (3.07 eV) than the pure ZnO (3.20 eV), while the PL peak was observed...
3(d) manifested all the bands as found in the individual spectrum with less peak intensity. It can be concluded that the components of nanocomposite exhibit strong interaction with their counterparts. Figure 3 FTIR spectra of (a) MWCNTs (b) ZnO NPs (c) PIn (d) the synthesized nanocomposite...
Fig. 2 shows the FTIR spectra of pure PANI and the P5CZO20 nanocomposite. The characteristic peaks of emeraldine salt form of PANI observed at 1554 and 1460 cm−1 are attributes of CN and CC stretching vibrations of quinoid and benzenoid units, respectively [42]. Peak observed at 1282 cm...
In order to further understand the interaction between ZnO and ZrO2, we have performed CO2-TPD experiments over the ZnO(15)–ZrO2sample, pure ZnO particles with different average sizes (11, 19, and 37 nm) and pure ZrO2with an average particle size of 10 nm. As shown in Fig.4d, th...
Functional group have been ascertain by FTIR peak assignment. Small variation in structural parameter and ZnO stretching mode indicate substitution of Cu at ZnO site of ZnO nanostructure. The band gap engineering with variable Cu concentration successfully reduces the apparent band gap, which help to ...
The crystallite size was calculated using Debye–Scherrer equation (Eq.1) for the most intense peak at (101) plane: $$D=\frac{k\lambda }{\beta Cos\theta }$$ (1) where D = crystallite size; λ = wavelength of X-ray; k = shape factor (0.89); β = FWHM (full...
(FTIR), scanning electron microscopy-energy-dispersive X-ray analysis (SEM-EDAX), and ultraviolet–visible spectroscopy (UV–Vis), confirmed the successful formation of pure and Mg-Ag-doped ZnO NPs. The UV–Vis absorption spectra showed a shift from 395.6 nm (pure ZnO) to 373.2 nm (Mg-Ag...
The XRD pattern shows typical peak pattern for pure hexagonal wurtzite structure to match with the JCPDS data. The samples are found to be consisting of nanorods of diameter 20-30nm as revealed by the TEM image. The FTIR pattern confirms the formation of the compounds. The DR study was ...
The FTIR results of doped and undoped ZnO are displayed in Fig. 2 (c). The peak near wave number 1100 cm−1 indicates C–O stretching mode, and the CC stretching mode of alkenes from organics near 1200 cm−1. The peaks corresponding to ZnO stretching vibration are visible near 500 ...
4). The FTIR peak at 1633 cm−1 indicates the amide bands of amyloid and a decrease of transmittance in this range indicates the loss of β sheet. It has been observed the presence of amide I peak suggests predominant β sheet structure and upon degradation of fibrillar structure the ...