A new heterojunction photocatalyst of MoS₂/Co₃O₄ was synthesized for degrading water organic pollutants firstly. The heterojunction photocatalyst contains small Co₃O₄ nanoparticles deposited on the surface of MoS₂ nanosheets. The MoS₂/Co₃O₄ heterojunction exhibits superior degradation efficiency than pure MoS₂ and Co₃O₄ for removing 2-mercaptobenzothiazole (MBT) and tetracycline (TC) under visible light. The high degradation efficiency mainly stem from creating heterojunction between MoS₂ and Co₃O₄. The uniform particle size of Co₃O₄ and the better interfacial interaction of MoS₂ and Co₃O₄ enhance the surface of heterojunction and inhibiting electron-hole pairs recombination. In addition, deep insight in mechanism suggests that holes and superoxide radicals are the major active species in the MBT and TC removal procedures. This present work may provide a promising approach to fabricate other transition metal heterojunction with efficient photocatalytic activity.

合成了一种新型的MoS ₂ / Co ₃ O ₄异质结光催化剂，用于降解水中的有机污染物。异质结光催化剂包含沉积在MoS ₂纳米片表面的小的Co ₃ O ₄纳米粒子。MoS ₂ / Co ₃ O ₄异质结在可见光下具有比纯MoS ₂和Co ₃ O ₄更好的降解效率，可用于去除2-巯基苯并噻唑（MBT）和四环素（TC）。高降解效率主要源于在MoS ₂和Co之间形成异质结₃ O ₄。Co ₃ O ₄的均匀粒径以及MoS ₂和Co ₃ O ₄的更好的界面相互作用增强了异质结的表面并抑制了电子-空穴对的重组。此外，对机理的深入研究表明，空穴和超氧自由基是MBT和TC去除程序中的主要活性物质。这项工作可能会提供一种有前途的方法来制造具有有效的光催化活性的其他过渡金属异质结。