Study on Preparation and Photocatalytic Properties of La-Cu2O/MgO Composites

摘要

This paper studied the preparation methods of La-doped Cu2O/MgO composites.The method used MgO as a carrier,La as a sensitizer and hydrazine hydrate as a reducing agent.The photocatalytic properties of the composite were studied with methyl orange solution as a probe.The La-Cu2O/MgO composite photocatalyst with the best catalytic effect was prepared in the solution of 50mL O.lmol/L Cu(NO3)2-3H2O,adding lOmL lmol/L NaOH,reaction time 3 hours,hydrazine hydrate dosage 5mL,carrier Magnesium Oxide lg and lanthanum nitrate doping amount 4%.Under the 40W tungsten filament light,the dosage of La-Cu2O/MgO composite was 0.2g/50mL,and the degradation rate of methyl orange solution with the concentration of 10mg/L may reach more than 90%.