One-pot room-temperature synthesis of covalent organic framework-coated superhydrophobic sponges for highly efficient oil-water separation

吸附 多孔性 化学工程 硅油 环境污染 石油泄漏 化学 接触角 环境友好型 材料科学 环境科学 有机化学 环境工程 复合材料 环境保护 工程类 生物 生态学
作者
Jing Li,Yixin Yang,Wende Ma,Guorong Li,Qiaomei Lu,Zian Lin
出处
期刊:Journal of Hazardous Materials [Elsevier]
卷期号:411: 125190-125190 被引量:59
标识
DOI:10.1016/j.jhazmat.2021.125190
摘要

Frequent oil-spill accidents not only cause serious and long-term damage to marine ecosystems, but also lead to a huge loss of valuable natural resources. To lighten the environmental pollution of oil spills as quickly as possible, an efficient and environment-friendly approach for oil-water separation is highly desirable. Herein, a facile one-pot room-temperature approach was developed for large-scale fabrication of covalent organic framework-coated superhydrophobic sponges ([email protected]). The as-prepared [email protected] possessed many superior properties, including superhydrophobicity with the water contact angle of approximately 154.3°, large specific surface area (153.059 m2/g), high porosity of the network structures, as well as good mechanical and chemical stability. Taking the aformentioned advantages together, the superhydrophobic sponges showed ultra-high adsorption capacity for oil and various organic solvents. In comparision with its own weight, the adsorption amount of the [email protected] for silicone oil was up to 150 times and for toluene was 125 times, respectively. Furthermore, the superhydrophobic sponges also showed fast and highly efficient oil-water separation, outstanding flame retardancy and recyclability. In addition, the [email protected] were successfully applied to the high-efficiency removal of oil suspension from industrial waste water, firmly confirming their application prospect in industrial wastewater treatment.
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