Design Of Magnetic Bismuth-based Composite Photocatalyst Based On Biomass Carbon And The Application Research In Adsorption / Degradation Of Tetracycline Residue

In recent years,tetracycline,as an antibiotics,was widely used in clinical,it has made a greate contribution to the development of medical career,but it is worth noting that the impact which caused by the residual of tetracycline to the environment,it will eventually enter human body through a series of ways,and cause irreversible damage to the environment and the human body,therefore,to find a suitable method to solve the problem of tetracycline residues is the primary task.Photocatalytic technology,possess some advantages such as non-toxic,low cost,is an ideal green technology which has been widely used in environmental water pollution control.Among those photocatalysts,Bismuth-based photocatalysts such as Bi,Bi₂O₃ and?BiO?₂CO₃ have good stability and high photocatalytic activity,and are often used for the degradation of environmental water pollution.futher enhance the photocatalytic activity to realize its commercial applications,this paper introduces the biomass carbon material,which combines the bismuth-based photocatalyst with the carbonized biomass carbon material not only achieve the enhancement of the adsorption performance of photocatalyst,but also improve the separation of charge carriers in the photocatalyst,so as to made the photocatalytic performance a big boost,in addition,the use of biomass carbon materials can improve the use of solid waste,and reduce the air pollution that caused by incineration of biomass carbon materials.However,the separation and recovery of the composite photocatalyst from the solution is not ideal.Therefore,the magnetic material Fe₃O₄ is introduced in this paper to improve the separation and recovery performance of the composite photocatalyst.In this paper,the biomass carbon material-bismuth based photocatalyst-Fe₃O₄ system was constructed,the performance and properties of the composite photocatalyst were elucidated by a series of characterization methods.Following shows more details:?1?The porous carbon was prepared by a series of methods,and then the C/Fe₃O₄/Bi composite photocatalyst was synthesized by one-step method which was charactered by a series methods such as XRD,SEM,TEM,EDS,BET,UV-vis and fluorescence spectroscopy,the effects of different factors on the photocatalytic degradation of tetracycline were investigated,and the mechanism of photocatalytic degradation was also discussed.?2?The C/Fe₃O₄ with high degree of graphitization was prepared by one step method,the C/Fe₃O₄/Bi₂O₃ composite photocatalyst was synthesized by solvothermal method.The C/Fe₃O₄/Bi₂O₃ composite photocatalyst was charactered by a series methods such as XRD,Raman,XPS,SEM,TEM,UV-vis and mass spectrometry.The effects of different factors on the photocatalytic degradation of tetracycline were investigated.The photocatalytic degradation of intermediates and their mechanism were also discussed.?3?The Fe₃O₄/?BiO?₂CO₃ composite photocatalyst was prepared by solvothermal method,and then combined with carbon quantum dots which was based on biomass carbon materials to synthesis the Fe₃O₄/?BiO?₂CO₃/CQDs composite photocatalyst,and charactered by a series methods such as XRD,FTIR,XPS,SEM,TEM,UV-vis and photocurrent.The effects of different factors on the photocatalytic degradation of tetracycline were investigated,and the mechanism of photocatalytic degradation was also discussed.