Experimental Study on Preparation and Characterization of FeS2/Biochar Composites
Biochar is a kind of adsorbent with good application prospect.It can obtain excellent properties after proper modification.In recent years,biochar adsorption treatment of organic pollutants has gradually become a research hotspot.The combination of FeS2 and biochar can combine the advantages of large specific surface area,rich pore structure,rich functional groups and high adsorbability of original biochar with the advantages of high REDOX activity and strong electronic transport capacity of FeS2 nanomaterials.In this paper,FeS2/biochar composites were prepared by mechanical ball milling to obtain nanoscale materials,which could inhibit material agglomeration and improve the utilization rate of FeS2 in subsequent applications.The FeS2/biochar composites were characterized by SEM-EDX and XRD.The experimental results show that:Obvious diffraction peaks appeared at 2θ=33.04°,37.07°,40.76°,47.42°,56.27°,corresponding to the characteristic peak of pyrite FeS2(PDF#99-0087),indicating that pyrite type FeS2 was successfully prepared,and FeS2 successfully combined with biochar.SEM-EDS and XRD analysis showed that FeS2/biochar nanomaterials were prepared by ball milling for 72 h according to the mass ratio of ball material 15∶1,mass ratio of FeS2 to biochar 15∶1,molar ratio of Fe powder to S powder 1∶2,rotational speed 400 r/min.The material is spherical or quasi-spherical,the particle size distribution is uniform,the purity is high,and the crystallinity is good.
biocharFeS2recombinationfabrication and characterization
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