High Efficiency Solar Membranes Structurally Designed 3Dcore-2D Shell SiO2@Amino-Carbon Hybrid Advanced Composite for Facile Steam Generation.
High Efficiency Solar Membranes Structurally Designed 3Dcore-2D Shell SiO2@Amino-Carbon Hybrid Advanced Composite for Facile Steam Generation.
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DOI：
10.1021/acsami.0c10461
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发表时间：
2020-07
影响因子：
9.5
通讯作者：
Xibiao Li;Changfeng Guan;Xiaodong Gao;Xiahua Zuo;Weimin Yang;Hua Yan;Meinong Shi;Haoyi Li;
中科院分区：
文献类型：
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作者：
Xibiao Li;Changfeng Guan;Xiaodong Gao;Xiahua Zuo;Weimin Yang;Hua Yan;Meinong Shi;Haoyi Li;
高效利用太阳能产生蒸汽是应对全球淡水短缺和水污染挑战的一项很有前途的技术。传统光热膜在高温、高盐和腐蚀性环境中持续发挥作用的最大障碍之一是其力学性能的迅速下降。在这项工作中，开发了一种高效的太阳能驱动的界面水蒸发系统，该系统由聚多巴胺/碳/硅(PCS)复合膜支撑，并以浮动绝缘泡沫为衬底。与纯水系统相比，水蒸发率增加了3.1倍。以玻璃纤维(GF)膜为基材，对低成本的线型聚乙烯进行碳化处理，成功制备了表面2D-碳纳米层，并用多巴胺对碳膜进行修饰，以控制水分在碳膜和玻璃纤维中的传输。PCS膜具有较高的光吸收效率和良好的太阳能热转换能力，具有较高的太阳能蒸汽发电效率。在1kW·m-2的模拟太阳光照射下，PCS膜的蒸发率和光热转换效率分别为1.39 kg·m-2·h-1和80.4%，显著高于未加光热膜的玻璃纤维膜、碳硅膜和纯水。该蒸发系统在1个太阳的模拟日照下循环20次后仍保持较高的效率。这项研究为设计和制造高效耐用的蒸发系统提供了重要的见解。关键词：石英纤维3D芯、光热膜、功能碳2D壳、水蒸发、太阳能。
Steam generation through efficient utilization of solar energy is a promising technology in addressing the challenge of global freshwater shortage and water pollution. One of the biggest huddles for traditional photothermal membrane to function continuously in high temperature, high salt and corrosive environment has been attributed to their rapid decline of mechanical properties. In this work, a highly efficient solar-driven interfacial water evaporation system has been developed via a polydopamine/carbon/silicon (PCS) composite membrane supported by a floating insulation foam substrate. A 3.1 times increase in the water vaporization rate was recorded over pure water system. The 2D-carbon nanolayer on the surface was successfully prepared by carbonizing low-cost linear polyethylene with glass fibers (GF) membrane as the substrate, and then modified the carbon membrane with dopamine to control water transport on the carbon coating and within the glass fiber. The PCS membrane has a high efficiency for solar steam generation owing to high optical absorption and it has excellent solar thermal conversion capability. The evaporation rate and solar thermal conversion efficiency of the PCS membrane under simulated sunlight irradiation with 1 sun (1kW·m-2) are 1.39 kg·m-2·h-1 and 80.4% respectively, which are significantly higher compared to GF membrane, carbon/silicon (CS) membrane and pure water without photothermal membrane. The water evaporation system retained high efficiency after 20 cycles under simulated sunlight irradiation of 1 sun. This study provides critical insight on design and fabrication of a highly efficient and durable evaporation system. KEYWORDS: Silica fibers 3D core, Photothermal membrane, Functional carbon 2D shell, Water evaporation, Solar energy.