Visible-light-mediated facile synthesis of disulfides using reusable TiO 2 /MoS 2 nanocomposite photocatalyst.

A nontoxic and inexpensive TiO2/MoS2nanocomposite was prepared and employed as an efficient photocatalyst for the synthesis of symmetrical disulfides under visible light irradiation at room temperature. Both aryl and alkyl thiols survived the reaction conditions, affording the corresponding disulfides in good to excellent yields. The photocatalyst could be easily recovered by simple centrifugation and filtration and reused several times without significant loss in its activity. [ABSTRACT FROM AUTHOR]