^aResearch Scholar, Centre for Environmental Studies, Anna University, Chennai – 600 025, Tamilnadu, India

^bDirector and Professor, Centre for Environmental Studies, Anna University,

Chennai – 600 025, Tamilnadu, India

The nanoparticles were hydrothermally synthesized using β-MnO2 nanoparticles were primed using a chemical reduction method. β-MnO2 nanoparticles were validated to occur in the type of nanocrystals with a high specific surface area of 109 m2/g. While β-MnO2 nanoparticles were used as a photocatalyst for wastewater treatment, they demonstrated vastly more efficient hydrogen production action. The greater hydrogen production evaluate (750 mol-1/h) was attained by separating the artificial sulphide effluent (0.2 M) using β-MnO2 NPs in a photocatalytic reaction. The findings demonstrate the β-MnO2 NPs' efficient power abilities, notably for photocatalytic hydrogen detachment from sulphide wastewater. From this investigation, we evidenced a recyclable tactic for impactful sewage treatment through the use of photocatalytic water splitting employing β - MnO2 NPs.