Preparation,Characterization and Combustion Catalytic Performance of Celery Biochar and Its Composite Materials
Carbon materials,due to their unique electronic structure and high specific surface area,can effectively catalyze the decomposition reactions of energetic materials,thereby improving the efficiency and rate of energy release.Biological carbon and its composites,QC-760,QC@Fe-760,QC@Bi-760,QC@Fe0-760,QC@Fe-450,and QC@Bi-450,were prepared from celery as raw material through pyrolysis.Firstly,characterization was performed using IR,XRD,SEM,and BET,and the results showed that the specific surface area of QC-760 increased by 17 times compared to celery powder.Secondly,the effects of celery biochar and its composites on the thermal decomposition behavior of ammonium perchlorate(AP),octogen(HMX),and cyclotrimethylenetrinitramine(RDX)were investigated.The results indicated that the biochar and its composites had a significant impact on the decomposition process of AP,RDX,and HMX;among them,QC@Bi-450 had the best catalytic performance for AP,with an exothermic heat reaching 3 344 J/g;QC-760 had the best catalytic performance for RDX,advancing its exothermic peak temperature by 41.1℃ and increasing the exothermic heat by 713 J/g;QC@Fe0-760 advanced the decomposition peak temperature of HMX by 82℃.Finally,the adsorption performance of the samples on Rhodamine B was tested,and it was found that when the stirring time was 80 minutes,the sample mass was 2 mg/L,and the Rhodamine B concentration was 350 mg/L,QC-760 had the best adsorption performance.
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