Floating assembly method is a new way for preparing ordered macroporous materials.In this process,the co-mixture of binary colloidal particles was fabricated through the rapid assembly of polystyrene(PS)as a template ...Floating assembly method is a new way for preparing ordered macroporous materials.In this process,the co-mixture of binary colloidal particles was fabricated through the rapid assembly of polystyrene(PS)as a template and SiO2 nanoparticles at the air-water interface of the suspension,the ordered macroporous materials were obtained by removing the template.Scanning Electron Micrographs(SEM)show that macroporous material had regular close-packed face-centered cubic(fcc)structure and spaces left by templates were connected through some windows.The results indicate that the formation of ordered porous structure was influenced by the diameter of PS microspheres remarkably.When the diameter was in the range of 200-500 nm the ordered structure could be obtained easily.And the volume ratio of PS microspheres to SiO2 nanoparticles in the maxed suspension wasn’t primary factor of the the formation of the ordered structure.展开更多
以具有三维骨架结构的环氧树脂大孔聚合物为整体型模板,利用硅酸酯原位溶胶-凝胶过程和高温烧结法制备出大尺寸SiO2大孔材料,通过水热法用铝酸钠对材料进行表面改性,得到铝掺杂SiO2大孔材料(Al-SiO2),并用SEM、FTIR和XPS对大孔材料进行...以具有三维骨架结构的环氧树脂大孔聚合物为整体型模板,利用硅酸酯原位溶胶-凝胶过程和高温烧结法制备出大尺寸SiO2大孔材料,通过水热法用铝酸钠对材料进行表面改性,得到铝掺杂SiO2大孔材料(Al-SiO2),并用SEM、FTIR和XPS对大孔材料进行了表征.以Cu2+和Pb2+为模拟污染物,研究改性大孔材料的吸附性能.结果表明:改性大孔材料对Cu2+和Pb2+均具有良好吸附能力;Al-SiO2对Cu2+和Pb2+的最大吸附量分别为71mg.g-1和138mg.g-1,0.100 g Al-SiO2对100mL 50mg.L-1水溶液中Pb2+的去除率达到95.3%,重复使用3次后的去除率保持在89.8%.展开更多
文摘Floating assembly method is a new way for preparing ordered macroporous materials.In this process,the co-mixture of binary colloidal particles was fabricated through the rapid assembly of polystyrene(PS)as a template and SiO2 nanoparticles at the air-water interface of the suspension,the ordered macroporous materials were obtained by removing the template.Scanning Electron Micrographs(SEM)show that macroporous material had regular close-packed face-centered cubic(fcc)structure and spaces left by templates were connected through some windows.The results indicate that the formation of ordered porous structure was influenced by the diameter of PS microspheres remarkably.When the diameter was in the range of 200-500 nm the ordered structure could be obtained easily.And the volume ratio of PS microspheres to SiO2 nanoparticles in the maxed suspension wasn’t primary factor of the the formation of the ordered structure.
文摘以具有三维骨架结构的环氧树脂大孔聚合物为整体型模板,利用硅酸酯原位溶胶-凝胶过程和高温烧结法制备出大尺寸SiO2大孔材料,通过水热法用铝酸钠对材料进行表面改性,得到铝掺杂SiO2大孔材料(Al-SiO2),并用SEM、FTIR和XPS对大孔材料进行了表征.以Cu2+和Pb2+为模拟污染物,研究改性大孔材料的吸附性能.结果表明:改性大孔材料对Cu2+和Pb2+均具有良好吸附能力;Al-SiO2对Cu2+和Pb2+的最大吸附量分别为71mg.g-1和138mg.g-1,0.100 g Al-SiO2对100mL 50mg.L-1水溶液中Pb2+的去除率达到95.3%,重复使用3次后的去除率保持在89.8%.
