Cellulose Templated Zn1-XCuXO/Ag2O Composite Photocatalyst for the Degradation of Methylene blue under Visible light irradiation

Abstract

The Wastewater Textile, Pulp, Paper, And Dyeing Industries Contains Different Kinds Of Organic Dyes. These Dyes Have An Enormous Negative Impact On Human Health And The Whole Ecosystem. Photo catalysis Is The Preferable Way To Degrade Them. Accordingly, In This Work, The Zn1-Xcuxo/Ag2o Composite Photo catalyst (Cza) Were Synthesized Using Biological Renewable Cellulose Extracted From Unwanted Water Hyacinth (Eichhornia Crassipes) Plant As A Template And Characterized By Using Different Instruments. Two Optimizations Were Performed To Obtain The Best Catalyst. The First Optimization Resulted 2% Cu-Zno Catalyst (Cz-2) To Have Best Photo catalytic Performance (82%) Over The Photo catalytic Activity Of Z (33.38%), Cz-1 (63.25%), Cz-3 (64.59%) And Cz-4 (60.52%) On The Degradation Of Methylene Blue Under Visible Light Irradiation Within 100 Min. On The Other Hand, The Highest Photo catalytic Activity Was Obtained From Cza-10.2 Catalyst (92.48%) Prepared From Cz-2 And Ag2o With Molar Ratio Of 10:1 After Dried At 60 0c To Form Cza Composite Catalyst Within 24 Hr. However, Cza-6.8, Cza 13.6, And Cza-20.4 Composite Catalysts Could Degrade 90.47%, 79.24%, And 79.0% Of The Dye Respectively, Within 100 Min Under Visible Light Irradiation. Furthermore, The Cza-10.2 Catalyst Was Confirmed To Be Stable Through Three Consecutive Rounds During Reusability Tests. Generally, The Cellulose Aided Synthesis Led To The Formation Of Herarical Cza-10.2 Catalyst, Which Enhances Its Adsorption Capacity. However, Cu-Doping Was The Key Factor For The Visible Light Responsive Of Zno And Loading Of Ag2o On The Surface Of Cu-Zno Was Further Decreased The E-/H+Recombination. Hence, Both Doping Of N-Type Zno With Cu And The Formation Of P-N Hetrojunction With P-Type Ag2o Simultaneously Was Enhanced The Degradation Of Methylene Blue Under Visible Light Irradiation. Furthermore, The Effect Of Calcinations Temperature On The Photocatalytic Performance Of Cza-10.2 Based Catalyst Were Examined And The Result Shows Highest Photocatalytic Activity Of Cza-10.2 Was Obtained When It Was Calcined At 6000c (92.5%), Over The Cza-10.2 Calcined At 5000c (64.31%) And Cza-10.2 Calcined At 7000c (84%). Hence, Cza-10.2 Based Catalyst Calcined At 6000c Has Best Photo catalytic Performance Over Degradation Of Methyene Blue.