A study on methylene blue degradation: enhanced photocatalytic activity of Ag-ZnO nanocomposities

Abstract

Silver/Zinc Oxide nanocomposites (Ag-ZnO NCs) were fabricated by varying the weight percentages of both Ag and ZnO for investigating its photocatalytic activity. The structural, morphology and optical response of the prepared nanocomposites were examined with PXRD, FESEM, TEM, EDAX, FT-IR, UV-Vis-DRS and PL spectroscopy. The effect of Ag and ZnO concentrations on these nanocomposites was examinedby analyzing thephotocatalytic activity towards Methylene Blue (MB) dye degradationunder the UV irradiation. The overall results suggested that, AZ1:1 NC achieved better photocatalytic activity than AZ1:2 and AZ2:1 composition. Therefore, the present study demonstrated the viability of the Ag-ZnO NCs in remediation of environmental pollutant and treatment of waste water.

Highly ordered structure and susceptibility to light absorption of ZnO/calcium phosphate (5%) to enhance the stability of charge diffusion as a methylene blue bond breaker

“…On the other hand, high crystallinity indicates a measure of the degree of order in the crystal structure of the material, and then the uniform reaction by the composite can occur during photocatalytic activity. On the other hand, materials with Ag-ZnO NCs have potential as environmental remediation [93] calcium doped ZnO nanoparticles ZnO nanoparticles were successfully synthesized using the combustion method and showed good photocatalytic activity A sponge network with many pores was observed with an average particle size of 20 nm and is a factor that enhances the degradation ability.…”

Photocatalytic activity of visible light active Sr-hexaferrite prepared by solid-state reaction and the pechini methods

“…Figure 9 shows how an increase in catalyst concentration causes a decrease in degradation rate. As the amount of catalyst exceeds a critical value, it was found that the degradation activity decreases at higher concentrations due to the obstruction of photon penetration by the opaque of the suspension, thus reducing the number of photons reaching the active sites of the catalyst [33]. The experimental data were adjusted using linear behaviors, and the slopes of these curves indicate the degradation rate of the MB.…”