Controlled Synthesis of Ag-SnO2/α-Fe2O3 Nanocomposites for Improving Visible-Light Catalytic Activities of Pollutant Degradation and CO2 Reduction

The key to developing highly active α-Fe2O3-based photocatalysts is improve the charge separation and efficiently utilize electrons with sufficient thermodynamic energy. Herein, α-Fe2O3 nanosheets (FO) were synthesized using a metal-ion-intervened hydrothermal method then coupled SnO2 (SO) obtain SO/FO nanocomposites. Subsequently, nanosized Ag was selectively loaded on SO photo-deposition result in ternary Ag-SO/FO optimal nanocomposite could realize efficient aerobic degradation of 2,4-dichlorophenol as representative organic pollutant under visible-light irradiation (>420 nm), exhibiting nearly six-fold rates that for FO. Additionally, photocatalyst also applicable other pollutants even CO2 reduction. By steady-state surface photovoltage spectroscopy, fluorescence electrochemical methods, photoactivity enhancement principally attributed improved by introducing an electron platform high-energy-level Moreover, functions cocatalyst further facilitate catalytic This work provides feasible design strategy narrow-bandgap semiconductor-based combining cocatalyst.