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Structural control of silica aerogel fibers for methylene blue removal

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  • Special Topic: Smart and Functional Fiber Materials
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Abstract

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, A0W120 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 A0W120 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.

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Authors and Affiliations

  1. The State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China

    Si Meng, JunYan Zhang, Wen Xu, WenPing Chen, LiPing Zhu, Zhe Zhou & MeiFang Zhu

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  1. Si Meng
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  2. JunYan Zhang
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  3. Wen Xu
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  4. WenPing Chen
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  5. LiPing Zhu
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  6. Zhe Zhou
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  7. MeiFang Zhu
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Correspondence to MeiFang Zhu.

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Meng, S., Zhang, J., Xu, W. et al. Structural control of silica aerogel fibers for methylene blue removal. Sci. China Technol. Sci. 62, 958–964 (2019). https://doi.org/10.1007/s11431-018-9389-7

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  • DOI: https://doi.org/10.1007/s11431-018-9389-7

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