Optical and biological properties of MgO/ZnO nanocomposite derived via eggshell membrane: a bio-waste approach

Adsorption of Anionic Dyes by Polypyrrole‐Grafted Mesoporous SBA‐15 Composite: Isotherms, Kinetics, Thermodynamics, Interaction Mechanism and Recycling

“…The wide‐angle X‐ray diffraction pattern of SBA‐15 and SBA‐15/polypyrrole composite is shown in Figure 6. The broad peak around 2θ=21° for both SBA‐15 and SBA‐15/polypyrrole composite illustrates the amorphous nature of SBA‐15 [12] …”

“…Figure 7 displays the FESEM with EDX and mapping analysis of SBA‐15 and the SBA‐15/polypyrrole composite. The image of SBA‐15 exhibited a folded, worm‐like morphology [12] . The EDX spectrum and mapping images of SBA‐15 show the presence of elements such as Si and O as shown in Figure 7(a) and Table 1.…”

“…The asymmetric and symmetric stretching vibrations of Si−O−Si yielded peaks at 1053 and 802 cm −1 . The vibration of defective Si−OH groups yielded a peak at 963 cm −1 [12] . The bending vibration of Si−O−Si occurred at 432 cm −1 [17] …”

“…The corresponding peak intensity for the SBA‐15/polypyrrole composite was lower than that of the SBA‐15. It is due to the false scattering of diffracted rays of SBA‐15 by polypyrrole [12] …”

“…Mesoporous materials like SBA‐15, SBA‐3, SBA‐16, SBA‐1, MCM‐41, and MCM‐48 have been extensively utilized as adsorbents for pollutant removal. Of these, SBA‐15 is advantageous among these materials due to it's a large pore size, pore volume, high surface area, and high thermal stability [11–12] . SBA‐15, in general, has pores and can be used for polymerization with the addition of a monomer.…”