Ultralight and robustly compressible silica aerogel enhanced by AC/C sponge with high oil/water separation

Ultralight and robustly compressible silica aerogel enhanced by AC/C sponge with high oil/water separation
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采用 AC/C 海绵增强的超轻且可强力压缩的二氧化硅气凝胶,具有高油水分离度

DOI:
10.1007/s10934-021-01172-3
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发表时间:
2022-01
影响因子:
2.6
通讯作者:
Lixia Yang
Lixia Yang
中科院分区:
材料科学4区
文献类型:
--
作者:
Mengmeng Yang;Zhaofeng Chen;Tianlong Liu;Qiong Wu;Lixia Yang

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近年来,石油泄漏和工业有机污染物对环境和生物生态系统造成了不可弥补的损害。因此,含油废水的处理已成为一个严峻的全球性挑战。本文采用简单的两步法制备了超轻、强度高、超疏水的AC/C/SiO2气凝胶。由于引入了高强度碳泡沫,原本易碎的气凝胶表现出优异的机械性能(抗压强度高达1.6 MPa)和超低密度(19 mg cm−3)。值得注意的是,AC/C/SiO2样品在较大的压缩应变(高达80%)下保持完整的块体结构,没有任何损坏或裂纹。此外,该气凝胶具有153°的大水接触角,并表现出优异的吸油性能(39.13 g g−1)。因此,这些优异的特性使得所制备的气凝胶有希望用于水污染的吸附剂:溢油清理或从水中去除油和有机溶剂。
In recent years, oil spills and industrial organic pollutants have caused irreparable damage to the environment and biological ecosystems. Therefore, the treatment of oily wastewater has become a serious global challenge. Here, the ultra-light, robustly strength and superhydrophobic AC/C/SiO2aerogel are fabricated by simple two-step method. Due to the introduction of high-strength carbon foam, the originally brittle aerogel exhibits excellent mechanical properties (compressive strength up to 1.6 MPa) and ultra-low density (19 mg cm−3). Remarkably, the AC/C/SiO2sample maintains a integrate block structure without any damage or crack under large compression strain (up to 80%). In addition, the aerogel with large water contact angle of 153° and show excellent absorption for oil (39.13 g g−1). Therefore, these excellent characteristics make the as-prepared aerogel promising absorbents for water depollution: oil-spill clean-ups or removal of oils and organic solvents from water.
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