Oxygen-enriched tubular carbon for efficient solar steam generation
Oxygen-enriched tubular carbon for efficient solar steam generation
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用于高效太阳能蒸汽产生的富氧管状碳
DOI：
10.1016/j.carbon.2020.08.039
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发表时间：
2020-12
期刊：
影响因子：
10.9
通讯作者：
Fuqiang Huang
中科院分区：
文献类型：
--
作者：
Zhi Li;Wenqin Ma;Jijian Xu;Meng Qian;Hui Bi;Wei Zhao;Zhuoran Lv;Fuqiang Huang
碳材料具有良好的捕光性能，是一种很有前途的太阳能-热转换光吸收材料。然而，开发具有适合太阳能蒸汽发生的定制形态和性能的先进碳材料仍然具有挑战性。本文中，我们通过热解配位化合物（PEG-CaCl 2前驱体）成功地合成了具有均匀中空结构和一些缺陷结构的富氧管状碳。PEG分子在热解过程中通过配位作用（Ca-O）促进CaCl 2纳米棒的各向异性生长，同时作为碳源和氧源，以CaCl 2纳米棒为模板原位生长自掺杂管状碳。所得具有一维中空结构的管状碳具有用于光吸收的大比表面积（613 m2 g-1）、用于热局部化的低热导率（0.0474 W m-1 K-1）和丰富的亲水性含氧基团（8.62 at.%氧气）用于有效的水输送。因此，基于管状碳的自浮式光热膜，通过添加琼脂粘合剂制成，表现出宽带光吸收（96%），并在一个太阳照射下实现91.3%的高蒸发效率。该工作为设计和合成具有可控形态和所需结构的功能化碳提供了新的见解，这些功能化碳在太阳能蒸汽发生中具有潜在的应用前景。
Carbon materials with excellent light-harvesting capacity are promising light absorbers for solar-thermal conversion. However, developing advanced carbon materials with tailored morphology and properties that are suitable for solar steam generation remains challenging. Herein, we have successfully synthesized oxygen-enriched tubular carbon with uniform hollow architecture and some defective structure by pyrolysis of a coordination complex (PEG-CaCl2precursor). Briefly, PEG molecules can promote the anisotropic growth of CaCl2nanorods during pyrolysis through coordination interaction (Ca–O), and simultaneously serve as the carbon and oxygen sources for in-situ growth of self-doped tubular carbon using the as-formed nanorods as ideal templates. The resulting tubular carbon with one-dimensional hollow structure, possesses a large specific surface area (613 m2g−1) for light absorption, low thermal conductivity (0.0474 W m−1K−1) for heat localization, and abundant hydrophilic oxygen-containing groups (8.62 at.% oxygen) for efficient water delivery. Thus, the self-floating photothermal membrane based on the tubular carbon, fabricated by the addition of agar binder, exhibits broadband light absorption (96%) and achieves a high evaporation efficiency of 91.3% under one sun illumination. This work provides a new insight to design and synthesize functionalized carbon with controlled morphology and the desired structure for potential application in solar steam generation.
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影响因子：
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DOI：
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发表时间：
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期刊：
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影响因子：
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作者：
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