Preparation And Performance Of Biomass Carbon Aerogel Composites

In recent years,with the development of industry,a large number of toxic organic substances have been discharged into the surrounding environment,causing great pollution.In the textile and papermaking industries,organic materials are used in large quantities.However,some organic compounds containing special compounds can cause great harm to humans and animals even at very low concentrations,such as dyestuff cadmium black T,and chemical product p-nitrophenol.In this dissertation,high-performance photocatalytic materials supported by metal or metal oxides are prepared by hydrothermal carbonization process using a wide range of inexpensive biomass resources as raw materials for preparing carbon aerogel carriers,and applied to absorb and degrade organic pollutants in water.The main content of this topic is as follows:1.MIL-100?Fe?@CA-n?n=0wt%,0.5wt%,1wt%,2wt%,5wt?was prepared by using MIL-100?Fe?as a carrier with carbon aerogel prepared from watermelon rind as a carrier.%),using XRD,SEM,FTIR,and other analytical characterization methods and photocatalytic activity of rhodamine B degradation of the synthesized composite materials were studied,the results show that MIL-100?Fe?@CA-1wt%has the highest The degradation rate of photocatalytic activity reached 95%.After four cycles,the removal rate of rhodamine B was only slightly reduced.2.A carbon aerogel was prepared by mild hydrothermal method with melon as a carbon source,and it was grafted and composited with Fe₃O₄.Different concentrations of Fe₃O₄/CA composites were prepared by adjusting the content of iron?85wt%,90wt%,95wt%?.The Fe₃O₄/CA composites were characterized by XRD,FTIR,Raman,BET,TGA,XPS,TEM,SEM-EDS and VSM.The Fe₃O₄/CA composites were also found on the basis of the adsorption experiments.It is an inexpensive,efficient and recyclable adsorbent that removes toxic dyes.3.A nitrogen-doped carbon aerogel was prepared by a mild hydrothermal method using cotton as a carbon source?NCA?.Nickel acetate and its composite Ni/NCA were reduced by a chemical reduction method and prepared by adjusting the nickel content.Different ratios of Ni/NCA composites?45 wt%,60 wt%,75 wt%?.The synthesized Ni/NCA was analyzed by XRD,FTIR,Raman,BET,TGA,XPS,TEM,SEM-EDS,VSM and other analytical methods.The results demonstrate that Ni/NCA is an effective catalyst for the hydrogenation of nitroaromatic compounds.