Structural control of silica aerogel fibers for methylene blue removal

论文摘要

The development of efficient adsorbents is significant for the miniaturization and cost reduction of water purifying facility. In our previous study, a new kind of silica aerogel fibers(SAFs) with hierarchical structure and hollow structure were developed, which shows outstanding mass transport property and adsorption performance. Herein, we further control and study the hierarchical structure and hollow structure of silica aerogel fibers by changing the sulfuric acid concentration of ageing bath and spinning speed. For removing methylene blue, A0 W120 SAFs sample, with DI water as ageing bath and a winding speed of 120 mm/s,presents the best mass transport property and adsorption performance, as they possess larger pore sizes in the outer layer, thinner fiber wall and higher degree of hollowness. The removal rates of methylene blue by A0 W120 SAFs sample is up to 91.6% and 98.2% in 2 and 5 min, respectively, which are at least 30% higher than other comparable commercial adsorbents, while the adsorption capacity of methylene blue reaches up to 139.1 mg/g.

论文目录

文章来源

类型: 期刊论文

作者: MENG Si,ZHANG JunYan,XU Wen,CHEN WenPing,ZHU LiPing,ZHOU Zhe,ZHU MeiFang

来源: Science China(Technological Sciences) 2019年06期

年度: 2019

分类: 工程科技Ⅱ辑,工程科技Ⅰ辑

专业: 有机化工,环境科学与资源利用

单位: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University

基金: supported by the Shanghai Fundamental Research Projects(Grant No.16JC1400701),the National Natural Science Foundation of China(Grant No.51733002),the Changjiang Scholars and Innovative Research Team in University(Grant No.IRT16R13)

分类号: TQ342.86;X703

页码: 958-964

总页数: 7

文件大小: 853K

下载量: 23

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