The global challenges of freshwater scarcity and industrial wastewater pollution necessitate sustainable solutions. Nowadays, solar-driven interfacial steam generation represents a promising approach to freshwater production. One of challenges for solar-driven interfacial steam generation is improving the photothermal efficiency of evaporation materials. In this work, a kind of composite sponge (GCMP) has been engineered by integrating a ternary photothermal materials graphene oxide (GO), copper sulfide (CuS), and molybdenum disulfide (MoS₂) within a polyvinyl alcohol (PVA) matrix. Capitalizing on the synergistic photothermal effect between carbon-based and semiconductor materials, the designed evaporator overcomes the limitations of narrow spectral ab-sorption and low solar utilization efficiency in single-component systems. Characterized by high performanceunder 1-sun irradiation (1 kW m^-2) the sponge exhibits an evaporation rate of 2.31 kg m^-2 h^-1 and a solar-to-vapor efficiency of 94.9 %. It also shows strong salt rejection, with the evaporation rate remaining as high as 2.11 kg m^-2 h^-1 in a 15 wt% NaCl solution. The material is further proven to be highly effective in the purification of saline water and wastewater contaminated with organic dyes. Therefore, this work validates the syn-ergistic  photothermal effect  as  a novel  strategy  for  designing  high-performance  solar  evaporators,  offering a feasible and scalable pathway for cost-effective clean water production.