We propose a scalable solution-processing method for fabricating high-quality graphene and graphene/1T-MoS2 heterostructure films. The process begins with the synthesis of potassium-intercalated graphite (KC8), which is exfoliated in tetrahydrofuran (THF) to produce a stable dispersion of negatively charged (electron-rich) graphene sheets. The graphene is then transferred into water to form a surfactant-free aqueous dispersion suitable for making uniform graphene films via vacuum filtration and stamping. Additionally, graphene is combined with 1T-MoS2 nanosheets to prepare bulk graphene/1T-MoS2 heterostructure films.Comprehensive characterizations, including X-ray diffraction (XRD), absorption spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS), indicate that the heterostructure films exhibit enhanced optical and electronic properties, including improved light absorption, which could lead to novel optoelectronic devices. Raman spectroscopy shows that the structure and electronic properties of graphene undergo significant changes when interacting with MoS2, suggesting strong interlayer coupling and potential charge transfer between the layered components.Graphene films have high sensitivity for detecting dopamine (DA), while graphene/1T-MoS2 bulk heterostructure films exhibit a capacitance of up to 38.3 F g⁻¹ at 5 mV/s in non-aqueous electrolytes. These results highlight the potential of these films for advanced applications in molecular sensing and energy storage.

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Solution-processed multifunctional graphene and Graphene/MoS2 heterostructure films