Abstract Development of efficient, inexpensive, and environmentally-benign technologies for oil-spill cleanup is essential in light of the prevalence of spilling incidents, and their adverse environmental impact. We report the synthesis of a new composite material for solar-mediated oil absorbance and removal comprising highly porous polyurethane sponge embedded with a polydimethylsiloxane (PDMS) layer and carbon dots. The excellent oil cleanup capabilities of the material emanate from integrating the distinctive features of the three components. The PU sponge endows resilient, highly porous morphology, while the PDMS constitutes a highly hydrophobic internal layer facilitating oil absorption. The carbon dots have a particularly important role, exhibiting efficient sunlight absorbance and converting the irradiation to heat. The dissipated heat induced lower oil viscosity and concomitant greater uptake by the porous sponge. Altogether, excellent solar-mediated oil absorption and recovery, and good recycling capacity were accomplished. The simple synthesis utilizing inexpensive and environmentally-benign constituents, chemical stability, and recyclability make the carbon dot-PDMS-polyurethane composite sponge an attractive and practical vehicle for oil-spill cleanup, oil storage, and recovery applications.

中文翻译：

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通过碳点聚氨酯海绵进行太阳能介导的溢油清理

摘要 鉴于溢油事故的普遍性及其对环境的不利影响，开发高效、廉价且环境友好的溢油清理技术至关重要。我们报告了一种用于太阳能介导的吸油和去除的新型复合材料的合成，包括嵌入聚二甲基硅氧烷 (PDMS) 层和碳点的高度多孔聚氨酯海绵。该材料出色的油污清除能力源于整合了三种成分的独特特性。PU 海绵赋予弹性、高度多孔的形态，而 PDMS 构成一个高度疏水的内层，促进吸油。碳点具有特别重要的作用，表现出有效的阳光吸收并将辐射转化为热量。耗散的热量导致较低的油粘度并伴随着多孔海绵的更大吸收。总而言之，实现了优异的太阳能介导的油吸收和回收，以及良好的回收能力。利用廉价且对环境无害的成分、化学稳定性和可回收性的简单合成使碳点-PDMS-聚氨酯复合海绵成为一种有吸引力且实用的工具，用于溢油清理、储油和回收应用。