Synthesis and Characterization of ZeoliteX supported MnO2/Cu2O composite for degradation of methylene blue from aqueous solution

Abstract

Water Pollution Is A Result Of The Massive Amounts Of Waste Products, Like Organic Dyes, That Have Been Released Into The Environment As A Result Of Global Industrial Expansion. An Appealing Method For Eliminating Organic Dye Pollutants From Wastewater Is To Use Semiconductors As A Photo catalyst. Mno2 Has Shown Potential Uses In The Photo catalytic Field In Recent Years. However, Its Performance Is Constrained Due To Its High Agglomeration, Limited Stability And High Photo-Induced Electron-Hole Pair Recombination Rate. In This Thesis, Mno2Coupled With Cu2o By Varying Their Concentration Whereas Mno2 Takes 10%, 30%, 50%, 70%,And 90% Ratio Of The Composite And Labeled As 1mc, 3mc, 5mc, 7mc, And 9mc Respectively Which Are Intended To Reduce The Recombination Rate. To Characterize The As-Prepared Samples Different Techniques Such As Xrd, Sem, Ftir, Uv/Vis-Drs, Bet, Tga, Pl, And Eis Were Used.The Photo catalytic Activities Of Mno2, Cu2o, Zeolitex, Zm, Mc,1-Zmc, 2-Zmc, 3-Zmc, 4-Zmc, And 5-Zmc Catalysts Were Tested Towards The Degradation Of Methylene Blue (Mb), And 49%, 52%, 54%, 61%, 74.7%, 87%, 91%, 99.01%, 97%, And 89.1% Were Degraded Respectively In 80 Min Reaction Time Using 0.4g/L Amount Of Catalyst Within Neutral Ph (Ph7) At Room Temperature. Also, The Ternary Composite Without Any Light Was Checked And Degraded 75% Of Mb Dye. Among The Catalysts, 3-Zmc Had The Highest Performance Which Could Be Due To The Synergetic Effect Of Heterojunction (Mc) And The Support With Sufficient Amount Of Zeolitex That Results In Low Recombination, Lower Electron Transfer Resistance, Low Agglomeration, And High Surface Area. The Stability Experiment Revealed That 3-Zmc Demonstrates A Relatively Good Photo catalytic Activity After 4 Recycles. Therefore, Zeolitex-Supported Mno2/Cu2o Is A Promising Catalyst For The Degradation Of Mb Under Visible Light.