This study demonstrates
quick and efficient removal of different
dyes from wastewater by using MoS2/CuS nanosheet composites
(NCs) as adsorbent. The MoS2/CuS NCs are prepared by a
facile hydrothermal route, and the composites exhibit high adsorption
capacity with 273.23, 432.68, 98.78, and 211.18 mg/g for rhodamine
B (RhB), methylene blue (MB), methyl orange (MO), and rhodamine 6G
dyes (RhB 6G), respectively. This is ascribed to its high specific
surface area (106.27 m2/g) and small mesopores (2.299 nm)
which provide numerous adsorption sites and uniform coverage for dye
molecules. High adsorption efficiency is obtained for RhB (93.8%),
MB (100%), and RhB 6G (84.73%), except for MO (48.9%) at the adsorption
equilibrium time at the solution concentration of 80 mg/L. The adsorption
of MoS2/CuS NCs can be well described by the pseudo-second-order
kinetic model, and the adsorption isotherm at the equilibrium fits
well with the Langmuir model. The rapid and efficient adsorption ensures
MoS2/CuS NCs to be a broad-spectrum adsorbent for different
dye contaminants in water.