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

Abstract

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 MoSe 2 in situ tightly grown on TiO 2 nanoribbons (TiO 2 @MoSe 2 ) is synthesized via a facile hydrothermal route. In contrast to alone MoSe 2 , the growing MoSe 2 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 photo-generated 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 TiO 2 @MoSe 2 was superior to both MoSe 2 and TiO 2 .