Liu Fengqi, Jiang Yonggang, Feng Junzong, Li Liangjun, Feng Jian
Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Technology, National University of Defense Technology, Changsha 410073, China.
Gels. 2023 Mar 10;9(3):214. doi: 10.3390/gels9030214.
Increasing pollution from industrial wastewater containing oils or organic solvents poses a serious threat to both the environment and human health. Compared to complex chemical modifications, bionic aerogels with intrinsic hydrophobic properties exhibit better durability and are considered as ideal adsorbents for oil-water separation. However, the construction of biomimetic three-dimensional (3D) structures by simple methods is still a great challenge. Here, we prepared biomimetic superhydrophobic aerogels with lotus leaf-like structures by growing carbon coatings on AlO nanorod-carbon nanotube hybrid backbones. Thanks to its multicomponent synergy and unique structure, this fascinating aerogel can be directly obtained through a simple conventional sol-gel and carbonization process. The aerogels exhibit excellent oil-water separation (22 g·g), recyclability (over 10 cycles) and dye adsorption properties (186.2 mg·g for methylene blue). In addition, benefiting from the conductive porous structure, the aerogels also demonstrate outstanding electromagnetic interference (EMI) shielding capabilities (~40 dB in X-band). This work presents fresh insights for the preparation of multifunctional biomimetic aerogels.
来自含有油类或有机溶剂的工业废水的污染日益严重，这对环境和人类健康都构成了严重威胁。与复杂的化学改性相比，具有固有疏水特性的仿生气凝胶表现出更好的耐久性，被认为是油水分离的理想吸附剂。然而，通过简单方法构建仿生三维（3D）结构仍然是一个巨大的挑战。在此，我们通过在AlO纳米棒-碳纳米管混合骨架上生长碳涂层，制备了具有荷叶状结构的仿生超疏水气凝胶。由于其多组分协同作用和独特结构，这种引人入胜的气凝胶可以通过简单的传统溶胶-凝胶和碳化过程直接获得。该气凝胶表现出优异的油水分离性能（22 g·g）、可回收性（超过10个循环）和染料吸附性能（亚甲基蓝为186.2 mg·g）。此外，受益于导电多孔结构，该气凝胶还表现出出色的电磁干扰（EMI）屏蔽能力（在X波段约为40 dB）。这项工作为多功能仿生气凝胶的制备提供了新的见解。
