J. Mater. Sci. Technol. ›› 2021, Vol. 64: 21-28.DOI: 10.1016/j.jmst.2020.01.029

• Research Article • Previous Articles     Next Articles

Enhanced photoelectrochemical cathodic protection performance of MoS2/TiO2 nanocomposites for 304 stainless steel under visible light

Xiumin Maa,c,d, Zheng Maa,b,c,d, Dongzhu Lua,c,d, Quantong Jianga,c,d, Leilei Lia,c,d, Tong Liaoa,c,d, Baorong Houa,b,c,d,*   

  1. aCAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Science, Qingdao, 266071, China
    bInstitute of Marine Science and Technology, Shandong University, Qingdao, 266237, China
    cOpen Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, China
    dCenter for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, 266071, China
  • Received:2019-06-30 Accepted:2019-11-26 Published:2021-02-20 Online:2021-03-15
  • Contact: Baorong Hou
  • About author:*CAS Key Laboratory of Marine Environmental Corro-sion and Bio-fouling, Institute of Oceanology, Chinese Academy of Science, Qingdao,266071, China.E-mail address: brhou@qdio.ac.cn (B. Hou).


In this work, TiO2 nanotube arrays (NTAs) sensitized with MoS2 microspheres (MoS2/TiO2 nanocomposites) were prepared on a flat Ti substrate via two-step anodization and hydrothermal method sequentially. TiO2 NTAs were composed of many orderly nanotubes, whose large specific surface area was favorable for light absorption and MoS2 microsphere adhesion. The MoS2 microsphere as a narrow band gap semiconductor extended the TiO2 NTAs’ absorption band edge to the visible region. The 2D structure of MoS2 microspheres and the construction of heterojunction electronic field at the interface of MoS2 microspheres and TiO2 NTAs promoted the separation of photoinduced carriers. The MoS2/TiO2 nanocomposites could provide higher photoelectrochemical cathodic protection for 304 stainless steel (304 SS) under visible light than pristine TiO2 NTAs.

Key words: Anti-corrosion, TiO2 nanotube array, MoS2 microspheres, Photoelectrochemical cathodic protection, Visible light