Synthesis and Adsorption of Heavy Metal Ions of Mercapto-Functional Silica Spheres Graphene Composites
Monodispersed mercapto-functional silica sphere(MFS)was prepared by the one-pot method,and MFS graphene aerogel ultra-light composite(MFSGA)was further synthesized by the hydrothermal method.The structure and morphology of these materials were characterized using XRD,SEM,FTIR,and other methods.MFSGA exhibited excellent structure strength,while MFS particles were fully loaded by the graphene aerogel(GA)framework and highly uniformly dispersed.The influence of the TEOS addition,the selection of modifier,and other factors on the MFS morphology and structure were investigated.The adsorption characteristics of MFS and MFSGA for heavy metal ions such as Hg2+were tested using X-ray fluorescence method,and their saturated adsorption capacities for Hg2+were 260.19 and 158.06 mg/g,respectively.MFS is easy to synthesize and has a good application economy.MFSGA,with good structural stability,has the advantages of easy recovery and reuse,exhibiting broad application potential in heavy metal removal.
Mercapto-functional silica graphene compositesHydrothermal methodAdsorption of heavy metal ionsReusable
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