TiO2 @ MoSe2 line-to-face heterostructure: An advanced photocatalyst for highly efficient reduction of Cr (VI)

Developing photocatalysts with rapid charge separation and transfer is an effective strategy for improving photocatalytic performance. Herein, a composite heterostructure with line-to-face contact made of few-layer MoSe2 in situ tightly grown on TiO2 nanoribbons (TiO2@MoSe2) is synthesized via a facile hydrothermal route. In contrast to alone MoSe2, the growing MoSe2 array obviously avoid the aggregation and face-to-face self-restacking phenomenon, making it a reality of the transmission of photo-generated carriers mainly in basal plane rather than between the interlamination. The line-to-face heterointerface could significantly facilitate the photogenerated electron-hole pair fast separation and transport, which is verified by the analysis of photoelectrochemical performance tests. The Cr (VI) photoreduction experiments under full spectrum or visible light further demonstrated the photocatalytic capability of TiO2@MoSe2 was superior to both MoSe2 and TiO2.