α-FeOOH-Fe3O4@SiO2 magnetic composites are synthesized via a precipitation method through using Fe3O4 and α-FeOOH as the core,and SiO2 as the shell.Additionally,TiO2-Fe2O3 is synthesized through a sol-gel method,then α-FeOOH-Fe3O4@SiO2@TiO2-Fe2O3 is prepared through anaerobic calcination method,and used for the degradation of phenol.XRD,XPS,SEM,TEM,VSM,and other characterization techniques are employed to comprehensively analyze the composition,structure,morphology,and magnetic properties of the synthesized materials.The optimal conditions for phenol degradation are identified through single-factor analysis during the 300-minute photocatalytic reaction over α-FeOOH-Fe3O4@SiO2@TiO2-Fe2O3.It is indicated by the results that the degradation rate of phenol reaches 82.3％at a pH of 2,62.3％with a 0.5 g dosage of α-FeOOH-Fe3O4@SiO2@TiO2-Fe2O3,and 91.2％under a 9 W light intensity.Free radical scavenger experiment reveals that both superoxide and hydroxyl radicals are pivotal in the degradation of phenol.Nano magnetic materials significantly enhance the separation efficiency of photogenerated electron-hole,maintain catalytic activity,confer magnetic properties,and facilitate efficient materials recovery.
phenolphotocatalysisnanometer magnetic materialdegradation
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