Composition and phase control of Ni/NiO nanoparticles for photocatalytic degradation of EDTA

▶ Sol-gel is a powerful approach to synthesize NiO nanoparticles. ▶ Catalyst phase and composition depend greatly on starting precursors. ▶ The annealing process is crucial for a better catalyst performance. ▶ The catalyst led to complete removal of EDTA under specific conditions. ▶ The reaction of Ni/NiO with EDTA follows first order kinetics.