Application Of Metal Sulfide And Carbon Nitrogen Compounds In Environmental And Supercapacitors

In recent years,due to rapid economic development,environmental pollution and the shortage of fossil fuel resources have become increasingly serious.Because the photodegradation and adsorptive separation technology have the characteristics of simplicity,low investment and short cycle time,they have broad application prospects in the field of sewage treatment.Due to ultra-high power density,short charge time,long cycle life,good temperature characteristics,and good operational safety,supercapacitors are becoming key devices that can replace the traditional chemical batteries.In this work,flower-like Cu₂MoS₄/g-C₃N₄ composites were prepared by hydrothermal synthesis method.In this method,the hydrothermal method arranges the Cu₂MoS₄ nanoplates into a three-dimensional flower-like structure and attaches to the g-C₃N₄ nanoplatelets.X-ray diffraction?XRD?,X-ray photoelectron spectroscopy?XPS?,scanning electron microscopy?SEM?,transmission electron microscopy?TEM?,and energy dispersive spectroscopy?EDS?were used to characterize the composition and morphology of the nanomaterials.We used its adsorption reaction to rhodamine B to evaluate the adsorption performance of the composite,and measured the adsorption capacity of the adsorbent using an ultraviolet-visible spectrophotometer.After the adsorption equilibrium,the adsorbent is separated by centrifugation and is desorbed with an ethanol solution,and then the adsorbent is recycled.We also synthesized CoS₂/g-C₃N₄ composites using a simple hydrothermal method.The synergistic effect of CoS₂ and g-C₃N₄ resulted in a significant increase in the catalytic performance of CoS₂/g-C₃N₄ composites.XRD,SEM,TEM,EDS,XPS,thermogravimetry?TGA?,FT-IR and other analytical methods were used to characterize the composition and morphology of nanomaterials.The electrochemical properties of the CoS₂/g-C₃N₄ electrode material were measured in a 1 M KOH electrolyte using a conventional three-electrode electrolytic system.We measured the cyclic voltammogram?CV?,galvanostatic charge/discharge?GCD?,cycling experiments and electrochemical impedance spectroscopy?EIS?of this electrode material on an electrochemical workstation.Moreover,we also performed liquid phase stripping on the conventional g-C₃N₄,and stripped the agglomerated bulk g-C₃N₄ into nanosheets.XRD,SEM,TEM,N₂adsorption and desorption isotherms,XPS,FT-IR,UV-visible diffuse reflection?UV-vis?and other test methods characterized the morphology of the exfoliated g-C₃N₄.We also used its photocatalytic degradation reaction of Rhodamine B to evaluate the catalytic performance of the composite,using an ultraviolet-visible spectrophotometer to measure the content of pollutants in the degradation process.