Journal of Colloid and Interface Science, Volume 555, 1 November 2019,
The two-dimensional (2D) ultrathin Mg-Al layered double hydroxide modified by magnetic Fe3O4 (Fe3O4/Mg-Al LDH) was successfully synthesized via the co-precipitation method. The Fe3O4/Mg-Al LDH not only exhibits superior separation efficiency of charge carriers but also possesses signally enhanced photocatalytic activity for CO2 reduction than Mg-Al LDH. The as-prepared Fe3O4/Mg-Al LDH affords the CO and CH4 generation rate of 442.2 µmol g−1 h−1 and 223.9 µmol g−1 h−1. The enhanced reduction CO2 activity mainly comes from synergetic effect of Fe3O4 and ultrathin Mg-Al LDH. And Fe3O4 can increase the separation efficiency of photogenerated electron-hole pairs, and ultrathin Mg-Al LDH can reduce the transmission resistance of charge carriers. Moreover, a detailed mechanism insight of Fe3O4/Mg-Al LDH for CO2 reduction is also investigated by a series of characterization methods and activity experiments. This work offers a simple and environment-friendly approach to develop recycled photocatalysts in CO2 reduction treatment.
Aluminum Compounds; Aluminum Hydroxide; Article; Binary Alloys; CO Reduction 2; CO2 Reduction; Carbon Dioxide; Catalyst; Characterization Methods; Charge Carriers; Coprecipitation Method; Efficiency; Electron; High Resolution Transmission Electron Microscopy; Impedance Spectroscopy; Iron Oxides; Magnesium Compounds; Magnesium Hydroxide; Magnetic Separation; Magnetite; Magnetite Nanoparticle; Mg-Al Layered Double Hydroxide; Photocatalysis; Photocatalyst; Photocatalysts; Photocatalytic Activity; Photogenerated Electrons; Photoluminescence; Precipitation; Precipitation (chemical); Priority Journal; Reduction (chemistry); Separation Efficiency; Spectrofluorometry; Synergic Effect; Synergic Effects; Synthesis; Ultra-thin; Ultrathin Magnesium Aluminum Layered Double Hydroxide; Ultrathin Mg-Al LDH; Unclassified Drug; Global