| Monodisperse hollow spheres have attracted considerable interest in the past few decades due to their well-defined morphology, uniform size, low density, large surface area, and wide range of potential applications. With the deepening of research, various hollow mesoporous materials with different compositions have been reported. TiO2 hollow nanostructures possess high active surface area, reduced diffusion resistance, and improved accessibility, which provide many new opportunities to the design of highly active nanostructure. In this paper, the catalyst Pd/Fe3O4@hTiO2 was synthesized by the organic combination of the nanoparticles of precious metal palladium and hollow titanium dioxide.The paper introduced a method for the magnetic Pd Fe3O4@hTiO2 catalyst was synthesized via a versatile kinetics-controlled coating method by using the Pd nanoparticles and magnetic silica sphere synthesized by the thermolysis of acetylacetone iron as the template. A variety of characterization methods, such as TEM, XRD, XPS, ICP and VSM, are used to analyze the structure and composition of the catalyst, and study their application in chemical reactions. We found that the catalyst presented a high activity for HDC of 4-CP under mild reaction conditions. When the reaction temperature is 25?, with H2 O as the solvent and in the presence of NaOH, the reaction time is 2 hours, the yield of phenol can reach 99.9%. Beyond that, the catalyst could be easily regained by an external magnet from the reaction mixture and recycled seven times without any significant loss in activity. |
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