焦耳加热的石墨烯包裹海绵可实现对粘性原油泄漏的快速清理。
Joule-heated graphene-wrapped sponge enables fast clean-up of viscous crude-oil spill.
作者信息
Ge Jin, Shi Lu-An, Wang Yong-Chao, Zhao Hao-Yu, Yao Hong-Bin, Zhu Yin-Bo, Zhang Ye, Zhu Hong-Wu, Wu Heng-An, Yu Shu-Hong
机构信息
Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.
CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230027, China.
出版信息
Nat Nanotechnol. 2017 May;12(5):434-440. doi: 10.1038/nnano.2017.33. Epub 2017 Apr 3.
The clean-up of viscous crude-oil spills is a global challenge. Hydrophobic and oleophilic oil sorbents have been demonstrated as promising candidates for oil-spill remediation. However, the sorption speeds of these oil sorbents for viscous crude oil are rather limited. Herein we report a Joule-heated graphene-wrapped sponge (GWS) to clean-up viscous crude oil at a high sorption speed. The Joule heat of the GWS reduced in situ the viscosity of the crude oil, which prominently increased the oil-diffusion coefficient in the pores of the GWS and thus speeded up the oil-sorption rate. The oil-sorption time was reduced by 94.6% compared with that of non-heated GWS. Besides, the oil-recovery speed was increased because of the viscosity decrease of crude oil. This in situ Joule self-heated sorbent design will promote the practical application of hydrophobic and oleophilic oil sorbents in the clean-up of viscous crude-oil spills.
粘性原油泄漏的清理是一项全球性挑战。疏水性和亲油性吸油剂已被证明是溢油修复的有前途的候选材料。然而，这些吸油剂对粘性原油的吸附速度相当有限。在此，我们报道了一种焦耳加热的石墨烯包裹海绵（GWS），以高吸附速度清理粘性原油。GWS的焦耳热原位降低了原油的粘度，显著提高了原油在GWS孔隙中的扩散系数，从而加快了吸油速率。与未加热的GWS相比，吸油时间减少了94.6%。此外，由于原油粘度降低，油回收速度加快。这种原位焦耳自热吸附剂设计将促进疏水性和亲油性吸油剂在粘性原油泄漏清理中的实际应用。
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