球型多孔二氧化硅吸附剂的制备和性能
发布时间：2018-11-02 17:13
【摘要】：在异丙醇水溶液中进行正硅酸乙酯水解-缩聚反应得到二氧化硅纳米球,然后在聚乙烯吡咯烷酮保护下将其用氢氧化钠溶液刻蚀,得到球型多孔二氧化硅吸附剂。用透射电镜、BET氮吸附法分别测试合成吸附剂的形貌和比表面积,并考察其吸附性能及其影响因素。结果表明,合成的二氧化硅具有近单分散的多孔纳米球型形貌,比表面积超过600 m~2/g,能有效吸附水中的重金属离子。
[Abstract]:Silica nanospheres were prepared by hydrolysis and condensation of ethyl orthosilicate in isopropanol aqueous solution and then etched with sodium hydroxide solution under the protection of polyvinylpyrrolidone to obtain spherical porous silica adsorbent. The morphology and specific surface area of the synthesized adsorbents were measured by transmission electron microscopy (TEM) and BET nitrogen adsorption method. The results show that the synthesized silica has nearly monodisperse porous nanospheres with a specific surface area of more than 600 mg / g and can effectively adsorb heavy metal ions in water.
【作者单位】： 莆田学院环境与生物工程学院;能源与环境光催化国家重点实验室;福建省新型污染物生态毒理效应与控制重点实验室;
【基金】：福建省自然科学基金(2015J01057,2016J05042) 莆田市科技局项目(2014S03,2016S1001)~~
【分类号】：X703.5;O647.33
本文编号：2306427
[Abstract]:Silica nanospheres were prepared by hydrolysis and condensation of ethyl orthosilicate in isopropanol aqueous solution and then etched with sodium hydroxide solution under the protection of polyvinylpyrrolidone to obtain spherical porous silica adsorbent. The morphology and specific surface area of the synthesized adsorbents were measured by transmission electron microscopy (TEM) and BET nitrogen adsorption method. The results show that the synthesized silica has nearly monodisperse porous nanospheres with a specific surface area of more than 600 mg / g and can effectively adsorb heavy metal ions in water.
【作者单位】： 莆田学院环境与生物工程学院;能源与环境光催化国家重点实验室;福建省新型污染物生态毒理效应与控制重点实验室;
【基金】：福建省自然科学基金(2015J01057,2016J05042) 莆田市科技局项目(2014S03,2016S1001)~~
【分类号】：X703.5;O647.33
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1 郁兆莲;无水硫酸铁及球型干燥剂的制备[J];洛阳师范学院学报;2001年02期
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