Ultrathin 2D silver sulphate nanosheets for visible-light-driven NO2 sensing at room temperature

2D Ag 2 SO 4 nanosheets have been delaminated from bulk Ag 2 S using a two-step combined exfoliation method. Upon blue light irradiation, the 2D Ag 2 SO 4 -based sensor exhibits high-performance responses toward low-concentrated NO 2 gas at room temperature.