Novel Mo-doped WO3/ZnO nanocomposites loaded with polyvinyl alcohol towards efficient visible-light-driven photodegradation of methyl orange

Catalytic, Theoretical, and Biological Investigations of Ternary Metal (II) Complexes Derived from L-Valine-Based Schiff Bases and Heterocyclic Bases

“…The C=N- (azomethine) stretching frequency of the ligand showed a strong absorbance peak at 1643 cm −1 ; a shift toward the higher wavelength region (1610–1635 cm −1 ) of the metal(II) complexes revealed that the azomethine nitrogen had coordinated with metal ions ( Table 2 ) [ 21 ]. The bands at (1570–1590 cm −1 ) and (1350–1380 cm −1 ) were attributed to the asymmetric and symmetric vibrational frequencies, respectively, of the carboxyl groups present in the amino acid [ 22 , 23 , 24 , 25 ]. The absence of a band in the 1700–1750 cm −1 region suggested that the COO − group of L-valine was coordinated with the central metal ion and that the difference in the frequency value between the asymmetric and symmetric stretching vibrations of the complexes lay between 180 and 216 cm −1 , for which the latter is practically larger than that of a free carboxylate ion [ 26 ].…”

Increasing the photocatalytic degradation rate of a rGO/PVA nanocomposite decorated with ZnO nanoparticles

“…30 pure PVA showed a low absorbance value in the visible region, with strong absorption in the UV region due to the presence of certain chromophores or functional groups within the polymer structure. 3 The pure rGO exhibited a broad absorbance peak around 250-300 nm, which is attributed to the p-p* electronic transition of the graphene structure. 26 This peak is generally stronger for rGO than for graphene oxide due to the reduction process that removes oxygen functional groups and enhances the conductivity of the material.…”

“…The photocatalysts used in this method are generally semiconductors like zinc oxide (ZnO) that are activated and decomposed by light to eliminate organic contaminants. [1][2][3] Pesticides, dyes, medicines, and even persistent organic pollutants have all been demonstrated to be eliminated successfully through the use of photocatalytic technologies. [4][5][6][7] Also, compared to other forms of treatment, photocatalytic technology has several benefits.…”

Catalytic response and molecular simulation studies in the development of synthetic routes in trimeric triaryl pyridinium type ionic liquids

“…One of the best things about ionic liquids that have been changed and given new functions is that they can be replaced 12 . Environmental awareness has heightened the need for scientists to develop "reaction systems" that are cleaner and more efficient [13][14][15][16] . One of the best ways to avoid using volatile organic solvents is to use room-temperature ionic liquids as the reaction medium 17,18 .…”