巯基硅球石墨烯复合材料的合成与重金属离子吸附

采用一锅法和水热法分别合成了单分散巯基修饰氧化硅球(MFS)及其石墨烯超轻复合材料(MFSGA)。利用X射线衍射、扫描电镜、红外光谱等方法对MFS和MFSGA的材料结构和形貌进行表征。MFSGA表现出良好的结构强度，MFS在复合材料中均匀分散。考察了材料粒径、修饰剂种类等因素对MFS形貌和表面结构的影响。采用X射线荧光法测试了MFS和MFSGA对Hg²⁺等重金属离子的吸附特性，二者对Hg²⁺的饱和吸附量分别为260.19和158.06 mg/g。MFS易于合成且应用经济性良好，MFSGA的结构稳定性好，易于回收与重复利用，具有较大的应用潜力。

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. XRD, SEM, FTIR, and other methods characterized the materials. 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 by detecting the adsorption of Hg2+ via XRF. MFS and MFSGA show higher heavy metal ions adsorption performance than pure GA, especially Hg2+. The saturated adsorption capacities of Hg2+ by MFS and MFSGA were 260.19 and 158.06 mg?g?1 at pH of 5, respectively. MFS is easy to synthesize and has a good economy. MFSGA, with good structural stability, has the advantages of easy recovery and reuse, exhibiting broad application potential in heavy metal removal.