Статья

Reduced Graphene Oxide-Zinc Sulfide Nanocomposite Decorated with Silver Nanoparticles for Wastewater Treatment by Adsorption, Photocatalysis and Antimicrobial Action

Hina NaeemDepartment of Chemistry, Rawalpindi Women University, 6th Road, Satellite Town, Rawalpindi 46300, PakistanHafiz Muhammad TofilDepartment of Chemistry, Quaid-i-Azam University, Islamabad 45320, PakistanMohamed SolimanDepartment of Microbiology, Faculty of Medicine, Northern Border University, Arar 91431, Saudi ArabiaAbdul HaiDepartment of Medical Laboratory Technology, Faculty of Applied Medical Sciences, Northern Border University, Arar 91431, Saudi ArabiaSyeda Huma H. ZaidiDepartment of Chemistry, Faculty of Science, Northern Border University, Arar 91431, Saudi ArabiaNadeem KizilbashDepartment of Medical Laboratory Technology, Faculty of Applied Medical Sciences, Northern Border University, Arar 91431, Saudi ArabiaDaliyah AlruwailiDepartment of Medical Laboratory Technology, Faculty of Applied Medical Sciences, Northern Border University, Arar 91431, Saudi ArabiaMuhammad AjmalDepartment of Chemistry, Division of Science and Technology, University of Education, Lahore 54770, PakistanMuhammad SiddiqDepartment of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan

2023en

ABI

Аннотация

Reduced graphene oxide nanosheets decorated with ZnS and ZnS-Ag nanoparticles are successfully prepared via a facile one-step chemical approach consisting of reducing the metal precursors on a rGO surface. Prepared rGO-ZnS nanocomposite is employed as an adsorbent material against two model dyes: malachite green (MG) and ethyl violet (EV). The adsorptive behavior of the nanocomposite was tuned by monitoring some parameters, such as the time of contact between the dye and the adsorbent, and the adsorbent dose. Experimental data were also simulated with kinetic models to evaluate the adsorption behavior, and the results confirmed that the adsorption of both dyes followed a pseudo 2nd order kinetic mode. Moreover, the adsorbent was also regenerated in a suitable media for both dyes (HCl for MG and ethanol for EV), without any significant loss in removal efficiency. Ag doped rGO-ZnS nanocomposite was also utilized as a photocatalyst for the degradation of the selected organic contaminant, resorcinol. The complete degradation of the phenolic compound was achieved after 60 min with 200 mg of rGO-ZnS-Ag nanocomposite under natural sunlight irradiation. The photocatalytic activity was studied considering some parameters, such as the initial phenol concentration, the photocatalyst loading, and the pH of the solution. The degradation kinetics of resorcinol was carefully studied and found to follow a linear Langmuir–Hinshelwood model. An additional advantage of rGO-ZnS and rGO-ZnS-Ag nanocomposites was antibacterial activity against Gram-negative bacterium, E. coli, and the results confirmed the significant performance of the nanocomposites in destroying harmful pathogens.

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Идентификаторы

DOI: 10.3390/molecules28030926

Цитирования и источники

Цитирований: 2Использованных источников: 0

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