Constructing cubic–orthorhombic surface-phase junctions of NaNbO3 towards significant enhancement of CO2 photoreduction†
Abstract
A NaNbO3 photocatalyst with cubic–orthorhombic surface-junctions was synthesized by a polymerized-complex method. Compared with cubic and orthorhombic NaNbO3, the activity of mixed-phase NaNbO3 is enhanced by 30% and 200% in reducing CO2 into CH4, respectively. The enhancement of photoactivity over mixed-phase NaNbO3 was attributed to the cubic–orthorhombic surface-junctions which improved the charge separation.