Robust, Reproducible Silica Scaffold for Liquid Flow Applications
Robust, Reproducible Silica Scaffold for Liquid Flow Applications
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DOI：
10.1021/acsaenm.3c00149
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发表时间：
2023-06-20
期刊：
影响因子：
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通讯作者：
Shultz，Mary Jane
中科院分区：
文献类型：
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作者：
Davies，Rebecca G.;MacInnis，Allyson E.;Shultz，Mary Jane
报道了一种高沉积面积、坚固的无机支架，其独特之处在于其可重复的各向异性大孔。该支架具有455 ± 34 kPa的杨氏模量和215 ± 10 kPa的压缩屈服强度。它支持3.5 ± 1.0 mL min-1cm-2的水体积通量，具有适度的4.4 kPa压头。该支架是通过冷冻铸造低pH值，浓缩的柠檬酸溶液，然后超临界干燥（SCD），改变了水玻璃用于产生支持基板的方式。该支架使得分子或纳米颗粒能够容易地固定用于液相应用，包括多相催化、分离、生物医学设备和能量存储。
A high-deposition-area, robust inorganic scaffold, unique in its reproducible anisotropic macropores, is reported. This scaffold has a Young’s modulus of 455 ± 34 kPa and a yield strength of 215 ± 10 kPa in compression. It supports 3.5 ± 1.0 mL min–1cm–2volumetric flux of water with a modest 4.4 kPa head pressure. The scaffold is generated by freeze-casting a low-pH, concentrated silicic acid solution, followed by supercritical drying (SCD), changing the way water glass is used to generate support substrates. The scaffold enables facile immobilization of molecules or nanoparticles for liquid-phase applications, including heterogeneous catalysis, separations, biomedical devices, and energy storage.