Low-Temperature Dried Alginate/Silica Hybrid Aerogel Beads with Tunable Surface Functionalities for Removal of Lead Ions from Water
Low-temperature dried alginate/silica hybrid aerogel beads with a large specific surface area (160.8 m<sup>2</sup>/g), low density (0.160 m<sup>2</sup>/g), and high degree of sphericity were successfully fabricated. Single networks of silica aerogels beads were synthesized vi...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-05-01
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| Series: | Gels |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2310-2861/11/6/397 |
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| Summary: | Low-temperature dried alginate/silica hybrid aerogel beads with a large specific surface area (160.8 m<sup>2</sup>/g), low density (0.160 m<sup>2</sup>/g), and high degree of sphericity were successfully fabricated. Single networks of silica aerogels beads were synthesized via by calcining hybrid aerogel beads in air. Moreover, alginate-derived carbon/silica aerogel beads were also obtained by the thermal treatment of the hybrid aerogel beads in nitrogen, which were indicative of the double networks of the as-synthesized crack-free hybrid aerogel beads for the first time. The adsorption performances of above aerogel beads were also investigated. Meanwhile, using a common silane coupling agent as a modifying agent, a series of hybrid aerogel beads with tunable functional surfaces were obtained. The results showed that the obtained samples adsorbed Pb<sup>2+</sup> well, and the hybrid aerogel beads modified with KH-590 exhibited an experimental maximum adsorption capacity of Pb<sup>2+</sup> of 193.73 mg·g<sup>−1</sup>. |
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| ISSN: | 2310-2861 |