摘要
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 TiOz expands the spectra response range,leading to enhanced quantum efficiency of photocatalyst.Furthermore.loading NH2-MIL-88(Fe)or N-TiOz 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-TiOz to NH2-MIL-88(Fe)rapidly,partially reduced Fe to Fe^2+in NH^2+MIL-88(Fe),and further enhanced the Fenton effect on efficiently degrading methylene blue dye(MB)under visible light(>420 nm)with the assistance of H2O2.
基金
Supported by the National Natural Science Foundation of China(Nos.52071027,51872025)
the National Key Research anc Development Program of China(No.2016YFB0701100)
National Key Research and Development H863 Program of China(No.18H86303ZT0032702)
the Fundamental Research Funds for the Central Universities of China(Nos.FRF-GF-20-03A FRF-GF-19-006B)。
