Photo-degradation, thermodynamic and kinetic study of carcinogenic dyes via zinc oxide/graphene oxide nanocomposites

Novel Synthesis of CuO/GO Nanocomposites and Their Photocatalytic Potential in the Degradation of Hazardous Industrial Effluents

“…Photodegradation of the MR dye follows first-order kinetics as already reported in the literature . These results are consistent with those seen in the photodegradation of the majority of organic compounds, especially azo dyes.…”

“…At this time, the reaction was quenched by introducing hydrogen peroxide. The solution was then rinsed with 0.5% hydrochloric acid to eliminate the sulfate ion. , The final product of GO was then dried at 75 °C and stored for future use.…”

“…This makes GO nanocomposites a promising material for a wide range of applications, including gas detectors, lithium-ion batteries, and catalytic applications . It is envisaged that the nanocomposite formation of graphene with the metal-oxide nanoparticles improves the intrinsic characteristics of graphene by increasing the charge transfers between metal oxides and organic dye molecules . Sarkar and Dolui synthesized copper oxide/reduced GO nanocomposites and demonstrate that they exhibited excellent and sustained catalytic activity, while Choi et al assessed the photocatalytic activity of semiconductor CuO/rGO nanocomposites under visible-light irradiations in the degradation of methylene blue dye .…”

“… 21 It is envisaged that the nanocomposite formation of graphene with the metal-oxide nanoparticles improves the intrinsic characteristics of graphene by increasing the charge transfers between metal oxides and organic dye molecules. 22 Sarkar and Dolui synthesized copper oxide/reduced GO nanocomposites and demonstrate that they exhibited excellent and sustained catalytic activity, 23 while Choi et al assessed the photocatalytic activity of semiconductor CuO/rGO nanocomposites under visible-light irradiations in the degradation of methylene blue dye. 24 CuO is a native p-type semiconductor material with an indirect theoretical band gap of 1 eV and an experimental narrow band gap of ∼1.2 eV.…”

Efficient photodegradation of methyl red dye by kaolin clay supported zinc oxide nanoparticles with their antibacterial and antioxidant activities

“…4 c, the ZnO NPs and ZnO/KC NCs degraded dye about 90 and 99%, respectively in a very short time of irradiation (10 min) under UV light irradiation. Various ZnO and ZnO based nanomaterials are applied as photocatalysts for MR dye degradation such as seaweed mediated ZnO NPs [ 19 ], ZnO nanorods [ 48 ], S-scheme ZnO–CoTe binary photocatalyst [ 49 ], silica@ZnO nanohybrids [ 50 ], ZnO/CdS heterostructures [ 51 ], ZnO-GNc [ 52 ] etc. These studies shows hard reaction conditions and long irradiation reaction times.…”