Spill-SOS: Self-Pumping Siphon-Capillary Oil Recovery
Spill-SOS: Self-Pumping Siphon-Capillary Oil Recovery
复制标题
Spill-SOS：自泵虹吸毛细管采油
DOI：
10.1021/acsnano.9b05703
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发表时间：
2019
期刊：
影响因子：
17.1
通讯作者：
Kostya Ken Ostrikov
中科院分区：
文献类型：
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作者：
Shenghao Wu;Huachao Yang;Guoping Xiong;Yikuan Tian;Biyao Gong;Tengfei Luo;Timothy S. Fisher;Jianhua Yan;Kefa Cen;Zheng Bo;Kostya Ken Ostrikov
石油泄漏仍然是一个世界性的挑战，需要在发生时采取紧急的“泄漏-SOS”行动。传统方法存在工艺复杂、成本高等问题。在这里，我们展示了一种太阳能虹吸式毛细撇油器(S-SOS)，它可以收集太阳能、重力势能和固体表面能量，从而能够以自泵的方式高效地回收溢油。S-SOS由倒U型多孔结构组装而成，结合了太阳能加热、虹吸和毛细效应，无需任何外部电源或人工干预。重要的是，固体表面能通过毛细管吸附来实现自启动行为，引力势能通过虹吸式输送来驱动石油流动，太阳能通过光热转换来获得以加快输送速度。在概念验证工作中，通过等离子体增强方法在石墨毡(GF)上生长垂直取向的石墨烯纳米片(VGS)作为U形结构，从而制备了全碳分层结构(VG/GF)。结果表明，在常温条件下，L m-2 h-1采收率为35.2%。在正常日照条件下，采收率可达123.3 L m~(-2)h~(-1)，光热效率为75.3%。此外，S-SOS体系具有良好的稳定性，在60h内没有明显的性能退化。这种优异的性能归功于等离子体制备的石墨烯纳米结构中增强的虹吸作用、毛细作用、光子吸收和界面加热。多重优点使得目前的S-SOS设计和VG/GF纳米结构有望有效地回收石油和传输储存在化学键中的能量。
Oil spills remain a worldwide challenge and need emergency “spill-SOS” actions when they occur. Conventional methods suffer from complex processes and high cost. Here, we demonstrate a solar-heating siphon-capillary oil skimmer (S-SOS) that harvests solar energy, gravitational potential energy, and solid surface energy to enable efficient oil spill recovery in a self-pumping manner. The S-SOS is assembled by an inverted U-shape porous architecture combining solar-heating, siphon, and capillary effects, and works without any external power or manual interventions. Importantly, solid surface energy is used by capillary adsorption to enable the self-starting behavior, gravitational potential energy is utilized by siphon transport to drive the oil flow, and solar energy is harvested by solar-thermal conversion to facilitate the transport speed. In the proof-of-concept work, an all-carbon hierarchical architecture (VG/GF) is fabricated by growing vertically oriented graphene nanosheets (VGs) on a monolith of graphite felt (GF) via a plasma-enhanced method to serve as the U-shape architecture. Consequently, an oil-recovery rate of 35.2 L m–2 h–1 is obtained at ambient condition. When exposed to normal solar irradiation, the oil-recovery rate dramatically increases to 123.3 L m–2 h–1. Meanwhile, the solar-thermal energy efficiency is calculated to be 75.3%. Moreover, the S-SOS system presents excellent stability without obvious performance-degradation over 60 h. The outstanding performance is ascribed to the enhanced siphon action, capillary action, photonic absorption, and interfacial heating in the plasma-made graphene nanostructures. Multiple merits make the current S-SOS design and the VG/GF nanostructures promising for efficient oil recovery and transport of energy stored in chemical bonds.