Tuning the efficiency of CoFe₂O₄@rGO composite by encapsulating Ag nanoparticles for the photocatalytic degradation of methyl violet dye and energy storage systems

Abstract

In the present work, silver nanoparticles encapsulated CoFe2O4@reduced Graphene oxide composite (Ag NPs/CoFe2O4@rGO) was prepared via a simple chemical co-precipitation technique. The formation of the materials was confirmed by various...

Reduced Graphene Oxide-Modified Spinel Cobalt Ferrite Nanocomposite: Synthesis, Characterization, and Its Superior Adsorption Performance for Dyes and Heavy Metals

“…Additionally, there are two peaks observed at 786.7 and 804.09 eV, which could be ascribed as satellite peaks. The presence of satellite peaks confirms large numbers of high-spin Co +2 ions occupying the octahedral sites …”

“…The peaks at 2925 and 2855 cm –1 could be ascribed to the asymmetric and symmetric CH 2 stretching vibrations, respectively, of rGO. The bands at 1255 and 1025 cm –1 denote the C–OH stretch of the alcohol group and C–O stretching vibrations from C–O–C, respectively, which can be related to rGO in the nanocomposite . The lesser intensity peaks in between 1600 and 1700 cm –1 could be attributed to the COOH, C–OH, and CO groups on rGO .…”

“…The bands at 1255 and 1025 cm –1 denote the C–OH stretch of the alcohol group and C–O stretching vibrations from C–O–C, respectively, which can be related to rGO in the nanocomposite. 36 The lesser intensity peaks in between 1600 and 1700 cm –1 could be attributed to the COOH, C–OH, and C=O groups on rGO. 40 The presence of these characteristic peaks of rGO in the nanocomposite confirms the successful formation of RGCF.…”

“…The crystal planes well matched with JCPDS card no (JCPDS 22-1086), confirming a FCC (face-centered cubic) spinel phase. 29 , 36 The average crystallite size was found to be 17.1 nm using Debye–Scherrer’s formula with the FWHM value (full width half-maximum) at 2θ = 35.74 of the crystal plane (311). The value obtained from the XRD data well resonates with the mean particle size obtained from the TEM images.…”

Facile synthesis of platelet‐like zirconium tungstate nanostructures for high‐performance supercapacitors

“…Furthermore, the pore size distribution curve (PSD) (Figure 1F) substantiated the results of BET isotherm curve. 4,40 Thus, N 2 adsorption-desorption analysis revealed that the contribution of surface area in the capacitive performance of ZrW 2 O 8 NPs is lesser, and thus the maximum of specific capacitance is mainly originated by the surface redox mechanism that occurred during the electrochemical reaction.…”