Piezo-photocatalytic reduction of nitrates to N2 over silver dispersed on BaTiO3@TiO2

Piezo-photocatalytic nitrate reduction to N 2 was realized for the first time. The piezoelectric-induced built-in electric field causes energy band tilting, leading to generating electrons with high reducibility to directly reduce NO 3 − to ˙NO 3 2− .