Preparation of heterogeneous Fenton catalyst with β-FeOOH/SiO2 composite and degradation of methyl orange solution
β-FeOOH/SiO2 composite heterogeneous Fenton catalyst was synthesized by a simple and environmentally friendly method.FT-IR,XRD,XPS,and TEM were used to characterize and analyze the catalyst.The effects of the preparation rati-o,synthesis temperature and synthesis time on the catalytic activity of the catalyst were investigated.Through the study of catalyst type and amount,as well as the amount of hydrogen peroxide,the optimal process conditions for the treatment of dye wastewater by β-FeOOH/SiO2 composite catalyst were explored.The results show that The preparation process is simple and the operating conditions is mild,which is easy for industrial production.The β-FeOOH/SiO2 composite catalyst has the best catalytic activity when the mass ratio of β-FeOOH to SiO2 is 1∶1,the reaction temperature is 90℃,and the reaction time is 8 h.Under the condition of 30℃,when the addition amount of β-FeOOH/SiO2 is 5 g/L and the addition amount of hy-drogen peroxide is 0.1 L/L,the removal rate of 200 mg/L methyl orange dye wastewater reaches the maximum of 98.85%.And the removal rates of methylene blue and rhodamine B reach 90.44%and 99.25%,respectively,indicating that the pre-pared β-FeOOH/SiO2 composite catalyst has a good degradation effect on dye wastewater.
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