Construction of CdS/MoS2 heterojunction from core–shell MoS2@Cd-MOF for efficient photocatalytic hydrogen evolution

Abstract

A new synthetic method was used to develop a CdS/MoS₂ heterojunction. Cd-MOF was coated onto the surface of MoS₂ flowers to construct a core–shell MoS₂@Cd-MOF. Thioacetamide was used as a sulfur source to sulfurize the MoS₂@Cd-MOF to form a CdS/MoS₂ heterojunction. Since the Cd²⁺ ions were highly ordered and separated by the organic ligands of the Cd-MOF shell, the as-synthesized CdS/MoS₂ heterojunction possessed a large surface area and intimate contact at the heterogeneous interface with a uniform loading of CdS nanoparticles on the MoS₂ flowers. Consequently, the CdS/MoS₂ heterojunction exhibited a significantly enhanced photocatalytic H₂ evolution rate of average 5587 μmol h⁻¹ g⁻¹ under UV-visible light irradiation.