Auto-combustion Fabrication and Optical Properties of Zinc Oxide Nanoparticles for Degradation of Reactive Red 195 and Methyl Orange Dyes

A new preparation method has been successfully utilized for the fabrication of zinc oxide nanoparticles using auto-combustion technique and fuels (tartaric acid: TA, citric CA a mix between them) with molar ratio (Zn:TA; Zn:CA Zn:CA:CA = 1:1:0, 1:0:0.55 1:0.5:0.275). The as-fabricated powder (ZTA, ZCA ZCTA samples) annealed at 500 °C. was tested by different techniques like DRS, UV–Vis, FT-IR, HR-TEM XRD. Crystallite size estimated to be 24, 39 26 nm ZTA, samples, respectively. direct band gap, lattice parameters, unit cell volume (V), dislocation density (D) Zn–O bond length (L) prepared were determined. synthesized are used as nanocatalyst photodegradation reactive red 195 methyl orange anionic dyes utilizing UV light irradiation. degradation dye 91–94% after 70 min over values increased 99–99.8% in 50 H2O2 under Also, 57.55–70.57% 300 81–95% Finally, appeared rate constant (Kapp) is determined mechanism photocatalysis process suggested nanoparticles.