Integrating both homojunction and heterojunction in QDs self-decorated Bi2MoO6/BCN composites to achieve an efficient photocatalyst for Cr(VI) reduction

Abstract Exploiting highly efficient and stable photocatalysts for Cr(VI) reduction is of great importance. Herein, both homojunction and heterojunction are introduced into a novel QDs self-decorated Bi 2 MoO 6 coupled with two-dimensional BCN (BCN-BMO(Q)) photocatalyst to achieve an enhanced performance of Cr(VI) reduction. Owing to the unique structure of the ternary system, electron-hole pairs are efficiently separated and transfer from the Bi 2 MoO 6 QDs to Bi 2 MoO 6 to BCN under visible-light excitation. Interestingly, 5% BCN-BMO(Q) shows stable and optimal performance for Cr(VI) photo-reduction activity within 20 min, which is almost 7.14, 2.28 and 1.66 times higher than that of BCN, BMO and BMO(Q) respectively under visible light irradiation. This work provides an alternative route to improve the photocatalytic activity of Bi 2 MoO 6 -based or some other nanocomposites.