【摘 要】
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Core-shell TiO2-based photocatalysts with specific composition,morphology,and functionality have attracted considerable attention for their excellent degradatio
【机 构】
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Beijing Advanced Innovation Center for Materials Genome Engineering,Beijing Key Laboratory of Functi
论文部分内容阅读
Core-shell TiO2-based photocatalysts with specific composition,morphology,and functionality have attracted considerable attention for their excellent degradation properties on organic pollutants via a photocatalytic oxidation process.Herein,a N-TiO2@NH2-MIL-88(Fe)core-shell structure was prepared by coating NH2-MIL-88(Fe)on nitrogen-doped TiO2(N-TiO2)nanoparticles.Introduction of heteroatom nitrogen to pure TiO2 expands the spectral response range,leading to enhanced quantum efficiency of photocatalyst.Furthermore,loading NH2-MIL-88(Fe)on N-TiO2 improved the adsorption ability of the nanocomposites due to the porous tunnels of NH2-MIL-88(Fe).The resulted core-shell N-TiO2@NH2-MIL-88(Fe)nanocomposites realized the transfer of photo excited electrons from N-TiO2 to NH2-MIL-88(Fe)rapidly,partially reduced Fe3+to Fe2+in NH2-MIL-88(Fe),and further enhanced the Fenton effect on efficiently degrading methylene blue dye(MB)under visible light(λ≥420 nm)with the assistance of H2O2.
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