树枝状介孔二氧化硅纳米粒子(DMSNs)独特的三维中心辐射状孔道结构使其具有出色的比表面积和孔体积,表面硅羟基官能团可作为功能化活性位点。已有研究表明,DMSNs基新型吸附剂材料能够替代传统二氧化硅材料(如MCM-41和SBA-15),对重金属离子具有优异的去除作用。综述总结了DMSNs基新型吸附剂材料的功能化方法,比较了其和功能化MCM-41或SBA-15对不同重金属离子(Pb2+、Cr6+、Hg2+等)和放射性金属离子(U(Ⅵ)、Th(Ⅳ)等)的吸附性能,以期为设计具有优越重金属离子去除能力的DMSNs基新型吸附材料提供理论指导。
Dendritic mesoporous silica-based nanoparticles (DMSNs) possess excellent specific surface area and pore volume due to their unique three-dimensional center-radial pore structures.The silica hydroxyl groups on surface can be used as active sites for subsequent modifications.Previous studies have demonstrated that DMSNs-based adsorbent materials can efficiently remove heavy metal ions,and thus can replace traditional silica-based adsorbents (such as MCM-41 and SBA-15).This review not only summarized the functionalization methods of DMSNs-based adsorbents,but also compared the adsorption properties of DMSNs-based adsorbent materials with those of traditional functionalized MCM-41 or SBA-15 for different heavy metal ions (Pb2+,Cr6+,Hg2+,etc.) and radioactive metal ions [U(Ⅵ),Th(Ⅳ),etc.].The aim was to provide theoretical guidance for the design of novel DMSNs-based adsorbent materials with superior heavy metal ion removal capacity.
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基金资助
国家自然科学基金(52063029);陕西省自然科学基础研究计划资助项目(2022JM-200);延安大学大学生创新创业训练计划项目(D2021025)
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