Modification of Silica Nanoparticles with 4,6-Diacetylresorcinol as a Novel Composite for the Efficient Removal of Pb(II), Cu(II), Co(II), and Ni(II) Ions from Aqueous Media

Functionalization of Silica Nanoparticles by 5-Chloro-8-quinolinol as a New Nanocomposite for the Efficient Removal and Preconcentration of Al3+ Ions from Water Samples

“…The specific surface area, the average pore size, and the total pore volume of the composite are 80.53 m 2 /g, 3.26 nm, and 0.185 cc/g, respectively. The noticeable decrease in the surface area of the composite compared to silica confirms the success of loading 5-chloro-8-quinolinol onto the silica surface as clarified in Scheme …”

“…Plotting the final and initial values of pH of KNO 3 solutions in the presence of the composite prove that the value of point of zero charge of the nanocomposite is 2.95, as shown in Figure . Placing the silica/5-chloro-8-quinolinol composite in a medium that has a pH value less than the point of zero charge (2.95) causes the surface to be surrounded by the positive hydrogen ions that repel Al 3+ ions, thus reducing the separation efficiency and adsorption capacity . Placing the silica/5-chloro-8-quinolinol composite in a medium that has a pH value greater than the point of zero charge (2.95) causes the surface to be surrounded by the negative hydroxide ions that attract Al 3+ ions and ionize the OH group of the organic substance, thus increasing the separation efficiency and adsorption capacity. , Therefore, pH = 6 is the best value at which the maximum possible amount of aluminum ions can be removed.…”

“…Numerous advantages of silica include its high activity, high adsorption capacity, ease of preparation, diverse pore diameters and surface areas, and the potential for surface functionalization. , The utilization of silane as a coupling agent to modify the surface of nanoparticles, such as alumina and silica, has been the subject of a large number of recent studies. , By combining various functional groups with the surface of silica, it has been shown that the adsorption behavior can be altered and applicable on a large scale. A vast variety of organic compounds, such as dibenzoylmethane and 4,6-diacetylresorcinol, capable of chelating with a series of metal ions were used to functionalize the surface of silica. , Today, solid-phase removal utilizing nanostructures is regarded as a clean adsorptive method that protects humans from the harmful environmental effects of trace amounts of heavy metals and enhances their reusability and recovery. Once coupled with solid-phase extraction, nanomaterial’s high surface areas and strong uptake capacities result in enhanced performance for the preconcentration of trace heavy metals.…”

Synthesis and Characterization of New Mixed-Ligand Complexes; Density Functional Theory, Hirshfeld, and In Silico Assays Strengthen the Bioactivity Performed In Vitro

“…The electrolytic nature of the Mn­(II) complex was recorded, while the non-electrolytic nature was appeared with Fe­(III) and Cr­(III) complexes. All compounds were screened versus bacteria and fungi to evaluate their biological influence . Schiff base ligand of the thiazole derivative was derived and used for coordination with Mn­(III), Fe­(III), Cr­(III), Zr­(IV), and VO­(IV) ions.…”

“…All compounds were screened versus bacteria and fungi to evaluate their biological influence. 14 Schiff base ligand of the thiazole derivative was derived and used for coordination with Mn(III), Fe(III), Cr(III), Zr(IV), and VO(IV) ions. The complexes were elucidated by various tools and then their antibacterial activities 15 were tested.…”