Designing a concise hydrophobic modification strategy for carbonaceous materials still faces challenge. In this work, the bottom-up method of growing polysiloxane nanofilaments is used for hydrophobic modification of bulk coke. Polysiloxane nanofilaments formed on the bulk coke surface not only reduce the surface energy, but also increase the surface roughness, thus achieving the synchronization of roughening and energy reduction. The water contact angle of modified coke can be up to 144°, showing an outstanding water repellency. Depending on the imparted hydrophobicity, the modified coke can be used as a novel carbonaceous sorbent to selectively remove hydrophobic organic solvents from water. A diverse of different organic solvents can be absorbed by the modified coke. After 20 consecutive cycles, the value of absorption capacity of the modified coke still remains stable, holding an exceptional recyclability. The utilization method of coke and the hydrophobic modification strategy proposed in this work provide a new idea for the functionalization of other carbonaceous materials.

中文翻译：

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疏水改性散装焦炭作为新型碳质吸附剂用于去除有机溶剂

设计简洁的碳质材料疏水改性策略仍然面临挑战。在这项工作中，采用自下而上生长聚硅氧烷纳米丝的方法对散装焦炭进行疏水改性。在块状焦炭表面形成的聚硅氧烷纳米丝不仅降低了表面能，而且增加了表面粗糙度，从而实现了粗糙化和能量降低的同步。改性焦的水接触角可达144°，表现出优异的拒水性。根据所赋予的疏水性，改性焦炭可以用作新型碳质吸附剂，以选择性地去除水中的疏水性有机溶剂。改性焦可以吸收多种不同的有机溶剂。连续20次循环后，改性焦的吸收容量值仍然保持稳定，具有优异的可回收性。该工作提出的焦炭利用方法和疏水改性策略为其他碳质材料的功能化提供了新的思路。