Synthesis and Characterization of ZnAl-LDH/Mn3O4 Composite for Degradation of Methylene Blue in Aqueous Solution

Abstract

Organic Dyes Are The Major Cause Of Water Pollution, So That It Is Harmful For All Living Things. Photo catalysis Is One Of The Most Attractive And Cost-Effective Approaches For Removing Such Harmful Pollutants In Wastewater. Tri manganese Tetra Oxide Nanoparticles Are Well-Known Catalyst For The Removal Of Organic Pollutants Due To Its Natural Abundance, Low Cost, Low Toxicity, And High Catalytic Activity. In This Study, Znal-Layered Double Hydroxide/Mn3o4 Nano composites Were Synthesized Through In-Situ Growth Of Mn3o4Nanoparticles On The Layer Double Hydroxide Sheet, In The Ratio Of (50:50, 60:40, 70:30) Are Done, And Their Names Are Assigned As Zm-5, Zm-6, And Zm-7 Respectively. Various Characterization Techniques Were Used To Characterize All Synthesized Nano composites. The Degradation Of Methylene Blue (Mb) Under Visible Light Irradiation Was Employed To Evaluate The Photo catalytic Performance Of The Prepared Catalysts. The Photo catalytic Activities Of Bare-Mn3o4, Znal-Ldh, Zm-5, Zm-6, And Zm-7 Catalysts Were Evaluated Towards The Degradation Of Methylene Blue (Mb), And 50.05 %, 48.6 %, 93.2 %, 94.96 %, And 97.16 % Of Methylene Blue Dye Was Degraded, Respectively. Among The Catalysts, Zm-6 Catalysts Had The Highest Performance And 97.16 % Mb Dye Was Degraded Within 90 Minutes Under Visible Light Irradiation. The Increased Degradation Efficiencies Could Be Attributed To The Uniform Distribution Of Mn3o4 Nps On The Ldh Surface, Which Facilitates The Generation Of Electron And Hole Pairs, Lowers The Recombination Rate, Improves Charge Transfer, Improves Visible Light Absorption, Low Agglomeration, And Increases Surface Area. By Providing Enough Space For Nps Distribution, The Ldh Was Able To Induce The Required Photo stability. The Catalytic Dosage And Ph Effect Of Zm-6 Catalysts Were Studied.There fore, Zm-6 Catalyst Can Be Easily Regenerated And Reused Up To Five Times Without Losing Substantial Catalytic Activity