Silver decorated 2D nanosheets of GO and MoS₂ serve as nanocatalyst for water treatment and antimicrobial applications as ascertained with molecular docking evaluation

Abstract

In this work, synthesis of graphene oxide (GO) and reduced graphene oxide (rGO) was realized through a modified Hummers route. Different concentrations (5 and 10 wt%) of Ag were doped in MoS2 and rGO using a hydrothermal technique. Synthesized Ag-MoS2 and Ag-rGO were evaluated through XRD that confirmed the hexagonal structure of MoS2 along with the transformation of GO to Ag-rGO as indicated by a shift in XRD peaks while Mo–O bonding and S=O functional groups were confirmed with FTIR. Morphological information of GO and formation of MoS2 nanopetals as well as interlayer spacing were verified through FESEM and HRTEM respectively. Raman analysis was employed to probe any evidence regarding defect densities of GO. Optical properties of GO, MoS2, Ag-rGO, and Ag-MoS2 were visualized through UV–vis and PL spectroscopy. Prepared products were employed as nanocatalysts to purify industrial wastewater. Experimental results revealed that Ag-rGO and Ag-MoS2 showed 99% and 80% response in photocatalytic activity. Besides, the nanocatalyst (Ag-MoS2 and Ag-rGO) exhibited 6.05 mm inhibition zones against S. aureus gram positive (G+) and 3.05 mm for E. coli gram negative (G-) in antibacterial activity. To rationalize biocidal mechanism of Ag-doped MoS2 NPs and Ag-rGO, in silico molecular docking study was employed for two enzymes i.e. β-lactamase and D-alanine-D-alanine ligase B (ddlB) from cell wall biosynthetic pathway and enoyl-[acylcarrier-protein] reductase (FabI) from fatty acid biosynthetic pathway belonging to S. aureus. The present study provides evidence for the development of cost-effective, environment friendly and viable candidate for photocatalytic and antimicrobial applications.

Photocatalytic and antibacterial activity of graphene oxide/cellulose-doped TiO2 quantum dots: in silico molecular docking studies

“…In XRD analysis, GO (Fig. 3a) diffraction peak observed ~2θ ° = 12.33 °, which corresponds to plane of (001) indicated presence of the hexagonal phase that is well harmonized with JCPDS card # 04-0783 [35]. transitions [25].…”

“…3a), which corresponds to the (001) plane, indicating the presence of the hexagonal phase, which is consistent with JCPDS card # 04-0783. 35 The diffraction peaks of TiO 2 observed at 25.47 , 37.79 , 48.18 , 53.87 , and 62.68 are indexed as the (101), (004), ( 200), (105), and (204) planes, respectively, conrming the tetragonal structure of anatase TiO 2 (JCPDS card 21-1272). 36 Improved crystallinity was observed upon the doping of GO/CNC in the pristine material.…”

Bactericidal Action and Industrial Dye Degradation of Graphene Oxide and Polyacrylic Acid-Doped SnO2Quantum Dots:In SilicoMolecular Docking Study

“…For the synthesis of GO, a modified Hummer’s route was adopted . First, 2 g of graphite powder and 1 g of NaNO 3 were dissolved in 46 mL of concentrated H 2 SO 4 in an ice bath and stirred for 10 min.…”

“…For the synthesis of GO, a modified Hummer’s route was adopted. 32 First, 2 g of graphite powder and 1 g of NaNO 3 were dissolved in 46 mL of concentrated H 2 SO 4 in an ice bath and stirred for 10 min. KMnO 4 was introduced at >5 °C, turning the solution color from purple to yellow at magnetic stirring on an ice bath for 24 h. Further, 12 mL H 2 O 2 was incorporated, and the solution was centrifuged at 7000 rpm for 7 min and washed with HCl and deionized (DI) water to obtain a residue.…”

Catalytic and Photocatalytic Degradation Activities of Nanoscale Mn-Doped ZnCr2O4

“…Supported platinum and palladium catalysts have long been recognized to have strong catalytic efciency in the oxidation of alcohols. Tere are substantial research articles available for the most current developments in this topic [3][4][5][6][7][8][9][10]. Because of their simple synthesis technique, chemical as well as thermal stability, economic feasibility, and high catalytic efciency, pure and Mn-doped ZnCr 2 O 4 nanoparticles have captured a noteworthy interest for catalytic applications, primarily in organic reactions.…”