Studies On Synthesis Of Alcoholamine-based Carbon Disulfide Storage Materials And Preparation Of Metal Sulfides

As an odor-toxic organic sulfur compound,carbon disulfide?CS₂?widely exists in coal,natural gas,petroleum,and crude oil industries,resulting in its increasing discharge from industrial tail gases with the enhancing energy production.However,CS₂ is a potential resource for inserting transition metal fragments and subsequent functionalization.It can also react with primary amines to form important intermediates for the synthesis of useful organic compounds.Therefore,the capture and utilization of CS₂ has become an important research topic in recent years.Because the current method of capturing CS₂ has the disadvantages of high energy consumption,high operating cost,high catalyst cost and large processing amount of by-products,it is necessary to capture CS₂ efficiently and quickly under mild conditions without catalyst.This paper first explores the interaction between EDAs+EGs systems.The ionization trend between EGs and EDAs was determined by the change of conductivity,infrared spectra and the shift of peaks of NMR spectra.The ionic liquids were classified as ion-like liquids,and the formation mechanism of ionic liquids was discussed.Secondly,the method of efficiently and rapidly capturing CS₂ under mild conditions without catalyst was realized by EDAs+EGs ion-like liquid systems.After absorbing CS₂,the EDAs+EGs ion-like liquid systems produced a white precipitate and named it CS₂SM.The molecular structure of[⁺H₃NCH₂CH₂NH₃^+-S₂COCH₂CH₂OCS₂^-]_n was determined by modern spectroscopic techniques such as Nuclear magnetic resonance?NMR?,Fourier transform infrared spectroscopy?FTIR?,X-ray photoelectron spectroscopy?XPS?and X-ray diffraction?XRD?and used to stimulate plants growth.The results showed that CS₂SM could significantly promote the vegetative and reproductive growth of eggplant,tomato,green pepper and cucumber.In order to realize the reuse of CS₂,the generated CS₂SM was reacted with Pb?NO₃?₂,Zn?CH₃COO?₂ and CdCl₂ by hydrothermal method to prepare PbS,ZnS and CdS with nanometer size.At the same time,the effects of CS₂SM dosage,metal ion concentration,reaction temperature and reaction time on the preparation of metal sulfides were investigated.In addition,the formed CdS was used for photocatalytic reduction of CO₂ to obtain CH₄ and CO.In summary,this paper uses EDAs+EGs ion-like liquid systems to efficiently capture CS₂,form a CS₂SM,and use it in multiple ways.This provides a new method for the rapid capture,storage and utilization of CS₂.It also has important practical significance for reducing CS₂ emissions and achieving effective use of CS₂.