Synthesis of N-TiO2@NH2-MIL-88(Fe) Core-shell Structure for Efficient Fenton Effect Assisted Methylene Blue Degradation Under Visible Light

• Published in: Chemical research in Chinese universities 2020-12, Vol.36 (6), p.1068-1075
• Main Authors: Yuan, Huiting, Ren, Huizhen, Li, Minning, Li, Zetong, Liu, Mingrui, Dong, Wenjun, Wang, Ge, Zhuang, Tao
• Format: Article
• Language: English
• Subjects: Analytical Chemistry; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Inorganic Chemistry; Organic Chemistry; Physical Chemistry
• ISSN: 1005-9040; 2210-3171
• DOI: 10.1007/s40242-020-0285-x

Core-shell TiO 2 -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-TiO 2 @NH 2 -MIL-88(Fe) core-shell structure was prepared by coating NH 2 -MIL-88(Fe) on nitrogen-doped TiO 2 (N-TiO 2 ) nanoparticles. Introduction of heteroatom nitrogen to pure TiO 2 expands the spectral response range, leading to enhanced quantum efficiency of photocatalyst. Furthermore, loading NH 2 -MIL-88(Fe) on N-TiO 2 improved the adsorption ability of the nanocomposites due to the porous tunnels of NH 2 -MIL-88(Fe). The resulted core-shell N-TiO 2 @NH 2 -MIL-88(Fe) nanocomposites realized the transfer of photo excited electrons from N-TiO 2 to NH 2 -MIL-88(Fe) rapidly, partially reduced Fe 3+ 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( λ ≽420 nm) with the assistance of H 2 O 2 .