High-efficiency photocatalyst for water splitting : a Janus MoSSe/XN (X = Ga, Al) van der Waals heterostructure

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Wencheng Tang
  • Minglei Sun

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number185504
Journal / PublicationJournal of Physics D: Applied Physics
Volume53
Issue number18
Online published2 Mar 2020
Publication statusPublished - 29 Apr 2020

Abstract

Two-dimensional van der Waals (vdW) heterostructures were constructed using MoSSe and XN (X = Ga, Al) via density functional calculations to serve as water splitting photocatalysts. Both the MoSSe/GaN and MoSSe/AlN heterostructures are energetically, dynamically and thermally stable. Interestingly, they exhibited type-II band structures, indicating the ability to continuously separate photogenerated electrons and holes. They also have appropriate band edge positions for redox reaction potentials of water splitting at pH 0. Remarkably, the MoSSe/GaN vdW heterostructure possessed excellent carrier mobility for holes along both the transport directions. Besides, the charge transfer between the MoSSe and XN layers induced a strong built-in electric field, which further separated the photogenerated carriers. In addition, the MoSSe/GaN and MoSSe/AlN vdW heterostructures exhibit good optical absorption ability toward solar irradiation. All these excellent properties render the MoSSe/GaN and MoSSe/AlN heterostructures are high-efficiency photocatalysts for water splitting.

Research Area(s)

  • Janus transition metal dichalcogenides, Nitrides, photocatalysis, vdW heterostructure, Water splitting

Citation Format(s)

High-efficiency photocatalyst for water splitting : a Janus MoSSe/XN (X = Ga, Al) van der Waals heterostructure. / Ren, Kai; Wang, Sake; Luo, Yi; Chou, Jyh-Pin; Yu, Jin; Tang, Wencheng; Sun, Minglei.

In: Journal of Physics D: Applied Physics, Vol. 53, No. 18, 185504, 29.04.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review