Читать книгу Functionalized Nanomaterials for Catalytic Application - Группа авторов - Страница 21

FNMs of fullerene with exceptional features to modify the strength, stability, photocatalytic ability, and electron (e⁻) affinity have made attractions as nanocatalyst for photo-degradation of contaminants in water sources [134]. Strong absorptions were seen in the UV belt, while moderate absorptions are seen in visible, functionalization enhances the behavior of electron transference required for photocatalytic action [135]. New novel FNM (covalently bonded) Zn-Porphyrin functionalized/TiO₂ synthesized was used to degrade the contaminants MB and phenol, where ^·O²⁻, ^·OH and ^·OOH may participate in the reaction kinetics. Appropriate small band difference between FNM’s LUMO and TiO₂’s CB that leads to the electron transference was the cause for degradation according to authors Regulska, E. et al. [136]. In another situation, the authors Chai, B. et al. degraded Rh B by fullerene modified nanocomposites of g-C₃N₄ (C₆₀/g-C₃N₄) photocatalytically, where the efficiency was because of charge separation of photo e⁻ electrons and h⁺ holes in the FNM [137]. In the same way, poly-hydroxy fullerenes (PHF)/TiO₂ as PC were found to be effective for decomposition Procion (a red-dye). The molecular interactions between the two were a simple electrostatic force that enabled the composite to undergo surface modification [138]. Fullerene FNM with silanes was proved for its effective photocatalytic activity on phenols for oxidative decomposition [139]. C_70- TiO₂ hybridized FNMs were proved stable for its photocatalytic behavior for five recycle runs while decomposing sulfathiazole (sulfonamides drug) a powerful antibiotic [140].