A covalently conjugated MoS 2 /Fe 3 O 4 magnetic nanocomposite as an efficient & reusable catalyst for H 2 production.

Quick and easy recovery without the loss of the photocatalytic activity of the catalysing agent is an effective way to meet the challenges associated with the high cost of hazard-free hydrogen production. A '2D/0D' covalently conjugated nanocomposite of MoS2 /Fe3 O4 has shown efficient catalyzing ability for five cycles of dye-sensitized H2 evolution.