Visible-light photocatalytic inactivation of Escherichia coli by K4Nb6O17 and Ag/Cu modified K4Nb6O17

► We develoved a novel series of layered niobate K4Nb6O17 photocatalyst with Ag-Cu nanocomosites cocatalyst. ► Layered niobate K4Nb6O17 photocatalyst shows antibacterial activity under visible light irradiation. ► The superior photokilling ability of Ag-Cu/K4Nb6O17 film has been presented and discussed in this article.