State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China.
ACS Appl Mater Interfaces. 2013 Jun 26;5(12):5845-50. doi: 10.1021/am4015007. Epub 2013 Jun 7.
Development of sorbent materials with high selectivity and sorption capacity, easy collection and recyclability is demanding for spilled oil recovery. Although many sorption materials have been proposed, a systematic study on how they can be reused and possible performance degradation during regeneration remains absent. Here we report magnetic carbon nanotube sponges (Me-CNT sponge), which are porous structures consisting of interconnected CNTs with rich Fe encapsulation. The Me-CNT sponges show high mass sorption capacity for diesel oil reached 56 g/g, corresponding to a volume sorption capacity of 99%. The sponges are mechanically strong and oil can be squeezed out by compression. They can be recycled using through reclamation by magnetic force and desorption by simple heat treatment. The Me-CNT sponges maintain original structure, high capacity, and selectivity after 1000 sorption and reclamation cycles. Our results suggest that practical application of CNT macrostructures in the field of spilled oil recovery is feasible.
发展对选择性和吸附容量高、易于收集和可重复使用的吸附材料对于溢油回收是非常有必要的。虽然已经提出了许多吸附材料，但关于它们如何重复使用以及在再生过程中可能出现的性能下降，仍然缺乏系统的研究。在这里，我们报告了一种磁性碳纳米管海绵（Me-CNT 海绵），它是由相互连接的 CNT 组成的多孔结构，其中富含 Fe 封装。Me-CNT 海绵对柴油的质量吸附容量高达 56 g/g，对应的体积吸附容量为 99%。这种海绵具有很强的机械强度，油可以通过压缩被挤出。它们可以通过磁力回收和简单的热处理解吸来循环使用。在经过 1000 次吸附和回收循环后，Me-CNT 海绵仍然保持原始结构、高容量和选择性。我们的结果表明，CNT 宏观结构在溢油回收领域的实际应用是可行的。
