Synthesis of Cu and Cu ₂ O Nano Particles via Immersion Deposit Method and Investigation of Their Performances as Adsorbent/Catalyst in the Removal of Methyl Orange

This paper prepares Cu and nanoparticles using immersion deposition as a simple, green and cheap procedure and characterized by X‐ray diffraction, X‐ray fluorescence and scanning electron microscopy. The obtained cu nanoparticles are used for investigating the degradation characteristics of the methyl orange by measuring UV–vis absorption of the dye solution in different time. The obtained results reveal that a very fast degradation rate in the conditions of 2 g/L spherical Cu nanoparticles 0.01 mL , almost up to 91% degradation of 100 mg/L methyl orange solution is obtained only within 30 min. These nanoparticles were successfully used as a catalyst‐adsorbent for the degradation of methyl orange. Also, the Cu nanoparticle could be recovered and reused three times without the loss of its catalytic activity, which proves the catalyst is very affordable for industrial applications. The results show that the reaction of degradation of the dye presents pseudo‐first‐order kinetics.