Structural control of silica aerogel fibers for methylene blue removal

查看全文 作　　者：MENG [1]Si;ZHANG [1]JunYan;XU [1]Wen;CHEN [1]WenPing;ZHU [1]LiPing;ZHOU [1]Zhe;ZHU [1]MeiFang

机构地区：[1]State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University

出　　处：《Science China(Technological Sciences)》索引2019年第62卷第6期,共7页

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) 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. 关键词：AEROGEL fibers HIERARCHICAL HOLLOW WET SPINNING ADSORPTION

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Structural control of silica aerogel fibers for methylene blue removal

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