Bioinspired Ultralight Inorganic Aerogel for Highly Efficient Air Filtration and Oil-Water Separation
Bioinspired Ultralight Inorganic Aerogel for Highly Efficient Air Filtration and Oil-Water Separation
复制标题
用于高效空气过滤和油水分离的仿生超轻无机气凝胶
DOI：
10.1021/acsami.8b02081
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发表时间：
2018
影响因子：
9.5
通讯作者：
Chen Feng
中科院分区：
文献类型：
--
作者：
Zhang Yong-Gang;Zhu Ying-Jie;Xiong Zhi-Chao;Wu Jin;Chen Feng
无机气凝胶以其独特的结构和性质引起了人们的极大兴趣。然而，无机气凝胶的高脆性和高制造成本极大地限制了其实际应用。本文以松质骨为灵感，开发了一种新型的羟基磷灰石（HAP）纳米线无机气凝胶，具有高多孔性（孔隙率≈99.7%）、超轻（密度8.54 mg/cm3，约为水密度的0.854%）、高绝热性（导热系数0.0387 W/m·K）的优良弹性。值得注意的是，制备的HAP纳米线气凝胶可作为高效空气过滤器，具有较高的pm2.5过滤效率。此外，HAP纳米线气凝胶也是连续油水分离的理想选择，可以作为智能开关连续分离油水。与有机气凝胶相比，制备的HAP纳米线气凝胶具有生物相容性好、环境友好、成本低等优点。此外，本研究报告的合成方法可以在不使用有机溶剂的情况下大规模生产HAP纳米线。因此，制备的新型HAP纳米线气凝胶具有广阔的应用前景。
Inorganic aerogels have been attracting great interest owing to their distinctive structures and properties. However, the practical applications of inorganic aerogels are greatly restricted by their high brittleness and high fabrication cost. Herein, inspired by the cancellous bone, we have developed a novel kind of hydroxyapatite (HAP) nanowire-based inorganic aerogel with excellent elasticity, which is highly porous (porosity ≈ 99.7%), ultralight (density 8.54 mg/cm3, which is about 0.854% of water density), and highly adiabatic (thermal conductivity 0.0387 W/m·K). Significantly, the as-prepared HAP nanowire aerogel can be used as the highly efficient air filter with high PM2.5filtration efficiency. In addition, the HAP nanowire aerogel is also an ideal candidate for continuous oil–water separation, which can be used as a smart switch to separate oil from water continuously. Compared with organic aerogels, the as-prepared HAP nanowire aerogel is biocompatible, environmentally friendly, and low-cost. Moreover, the synthetic method reported in this work can be scaled up for large-scale production of HAP nanowires, free from the use of organic solvents. Therefore, the as-prepared new kind of HAP nanowire aerogel is promising for the applications in various fields.