Fabrication of homemade screen-printed nickel nanoparticles/boron-doped diamond electrode for electrochemical degradation of methyl orange

Water pollution caused by synthetic dyes, particularly Methyl Orange (MO), poses significant environmental challenges. MO can be toxic to aquatic life, affecting ecosystems when released into water bodies. Exposure to long and high concentrations may pose health risks to humans, including potential carcinogenic effects. Due to this risk, degradation of MO in environment is emerging. This study explores the electrochemical degradation of MO using boron-doped diamond nanoparticles (BDD NP) modified with nickel nanoparticles (NiNP). NiNP were synthesized via chemical reduction and integrated with BDD NP at different ratios (1:2, 1:3, and 1:5). The composite was then screen-printed onto the polyimide film. Electrochemical degradation experiments revealed that the NiNP/BDD B (1:3) electrode exhibited the highest efficiency, being twice more efficient compared to the BDD printed electrode at potential of +3 V (vs. Ag/AgCl). The enhanced performance is attributed to increased electroactive surface area and optimized hydroxyl radical formation. These findings highlight the potential of NiNP-modified BDD electrodes for effective wastewater treatment.