Preparation of multiwalled carbon nanotubes/Cd0.8Zn0.2S nanocomposite and its photocatalytic hydrogen production under visible-light

► MWCNTs/Cd0.8Zn0.2S nanocomposites are prepared for the first time. ► Efficient chemically bonding between the modified MWCNTs and Cd0.8Zn0.2S nanoparticles. ► Enhanced visible-light absorption and charge separation efficiency. ► Enhanced visible-light-driven photocatalytic H2 production efficiency with better durability. ► Beneficial for developing broad spectral responsive photocatalysts for H2 production.