Copper nanodot-embedded graphene urchins of nearly full-spectrum solar absorption and extraordinary solar desalination
Copper nanodot-embedded graphene urchins of nearly full-spectrum solar absorption and extraordinary solar desalination
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DOI：
10.1016/j.nanoen.2018.08.067
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发表时间：
2018-11
期刊：
影响因子：
17.6
通讯作者：
Jijian Xu;Feng Xu;M. Qian;Zhi Li;Peng Sun;Zhanglian Hong;Fuqiang Huang
中科院分区：
文献类型：
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作者：
Jijian Xu;Feng Xu;M. Qian;Zhi Li;Peng Sun;Zhanglian Hong;Fuqiang Huang
黑色材料是将太阳能转化为热能的关键，但要经济地实现全太阳光谱光吸收并最大限度地收获太阳能并非易事。在这里，我们开发了一种基于碳二亚胺空间受限热解的爆米花方法来合成嵌入铜纳米点的N掺杂石墨烯海胆。原位形成的铜纳米点在石墨烯基质中刚性固定和空间支架，在很宽的光谱范围内(300-1800 nm)实现了近全光谱的太阳光吸收(99%)。这种高效的太阳能收获是由密集杂化的局域表面等离子体共振赋予的，并由石墨烯基质稳定。当应用于太阳能海水淡化时，掺氮的石墨烯海胆为水的运输提供了结构互联和快速通道，并使形成的等离子体吸收器能够自然地漂浮在水面上。通过将吸收的能量集中在界面上，最终在模拟太阳光下实现了高效(~82%)和稳定的海水淡化。在实际应用中，等离子体吸收器的太阳能海水淡化系统在太阳照射下可以产生~5 L m−2天−1的淡水。
Black materials are the key to convert solar light to thermal energy, but it is not easy to economically achieve full solar-spectrum light absorption and maximally harvest solar energy. Herein, we develop a “popcorn” approach based on a space-confined pyrolysis of copper carbodiimide to synthesis Cu nanodot-embedded N-doped graphene urchins. In situ formed Cu nanodots are rigidly fixed and spatially scaffolded in the graphene matrix, achieving nearly full-spectrum solar light absorption (99%) over a wide spectral range (300–1800 nm). Such a highly efficient solar harvest is endowed by an intensively hybridized localized surface plasmon resonance and stabilized by graphene matrix. When applied in solar desalination, the N-doped graphene urchins provide structural interconnectivity and freeway for water transports and enable the as-formed plasmonic absorber to naturally self-float on water. By localizing the absorbed energy at the interfaces, efficient (~ 82%) and stable desalination is ultimately achieved under a simulated solar light. Practically, a solar desalination system of the plasmonic absorber can produce fresh water with a rate of ~ 5 L m−2day−1under solar irradiation.