Preparation Of Fish Scale-like Molybdenum Disulfide Nanomaterials And Their Adsorption Properties Of Inorganic Ions

With the development of society,various pollution problems are becoming increasingly prominent.Water pollution,especially heavy metal ions in inorganic wastewater,easily enriched and can't be degraded,which has caused serious hazards to the ecological environment and the health of various living organisms,lead ion is one of the most harmful.Among the various methods for removing heavy metal ions that have been explored,the adsorption method has attracted widespread attention because of its excellent characteristics.Therefore,it is essential to develop a new type of adsorbent that is environmentally friendly and does not cause secondary pollution,and which has an efficient removal effect on lead ions,which has great significance to improve the living environment and safeguarding the healthy lives of the people.In this paper,carbonized polypyrrole nanotubes were used as a template to synthesize fish scale-like molybdenum disulfide nanosheets-C-PPy@MoS2 in combination with high temperature hydrothermal method for the adsorption removal of lead ions in inorganic wastewater.The synthesized molybdenum disulfide nanosheets has a multi-layer structure,high crystallinity,and certain amount of micropores and mesopores.The adsorption time,the initial concentration of the solution,and the effect of the dosage of the adsorbent on the experiment were studied.The maximum adsorption amount of lead ions reached 381.87 mg/L.In the comparative adsorption experiments of the precursor C-PPy,the bulk structure of MoS2 and C-PPy@MoS2,the adsorption effects of the former two very weak,indicating the excellent adsorption performance of C-PPy@MoS2 is closely related to the particularity of its structure.In the equation simulation,the kinetic model conforms to the quasi-secondary dynamics,and the isotherm model conforms to the Langmuir adsorption isotherm model,the fitting of the internal diffusion model also helps us to analyze the adsorption rate of the whole adsorption process.In the filtrate adsorption experiment,the high concentration lead ions solution can be treated to the concentration that meets the drinking water standard,indicating that the material has certain efficiency and practical application.The morphology of the material after adsorption had changed significantly,and new substances were produced,so it is possible to speculate on the chemical reaction process that may occur during the adsorption process.