SYNERGISTIC EFFECTS OF pH ON COPPER DOPING IN NICKEL OXIDE NANOPARTICLES FOR ENHANCED PHOTOCATALYTIC DEGRADATION OF ACID RED DYE
The purpose of this study is to use copper-doped nickel oxide nanoparticles (Cu-NiO NPs) as a photocatalyst toremove the harmful acid red dye. Cu-NiO NPs were prepared hydrothermally, and their properties were investigatedusing XRD, SEM, EDS, BET, UV-Vis, TGA, XPS and FTIR techniques. The average particle size of NiONPs andCu-NiO NPs is 14.58nm and 6.63nm, respectively. The UV absorbance studies showed a strong absorptionat 370nm and 390nm, respectively, and the band gap energy values of NiO NPs and Cu-NiO NPs are 2.51eVand2.45eV. The doping of copper into the Nickel oxide nanoparticles had decreased the band gap energy, resultinginCu-NiO NPs showing more effectiveness in photocatalytic dye degradation. This study was used to optimize theagitation period, adsorbent dose, solution pH and starting concentration of acid red dye solution duringtheadsorption process. The agitation length of 115 minutes, the Cu-NiO NPs dose of 0.1 g, the solution pHof 9 andtheacid red dye starting concentration of 10 mg/L resulted in a 100% acid red dye degradation rate.
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