Carbon nanodots-based interfacial nanofluid for high-performance solar-driven water evaporation

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials Pub Date : 2024-08-30 DOI:10.1016/j.diamond.2024.111551

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引用次数: 0

Abstract

Solar steam generation through volumetric heating using nanofluids is a promising approach for wastewater treatment and desalination. However, low evaporation rate and slow response time to the change in solar intensity seriously affect their cumulative evaporation performance in practice. Here, we propose an interfacial nanofluid structure for high-performance solar-driven water evaporation using carbon nanodot (CDs) nanofluid and airlaid paper. CDs nanofluid transferred down through the paper from a source water tank to form an interfacial evaporation structure and ensure continuous water supply for evaporation. The solar conversion heat was only localized on a small amount of nanofluid on the paper resulting in low heat loss to the bulk nanofluid and a fast response time of within 2 min to reach a steady evaporation rate. In addition, the flowing nanofluid on the paper can absorb environmental energy to achieve high-rate evaporation of 1.93 kg m⁻² h⁻¹ under one sun irradiation. This study provides an effective strategy to improve the performance of volumetric heating systems for solar wastewater treatment and desalination.

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基于碳纳米点的高性能太阳能驱动水蒸发界面纳米流体

利用纳米流体通过容积加热产生太阳能蒸汽是一种很有前景的废水处理和海水淡化方法。然而，在实际应用中，蒸发率低和对太阳强度变化的响应时间慢严重影响了其累积蒸发性能。在此，我们提出了一种界面纳米流体结构，利用碳纳米点（CDs）纳米流体和气密纸实现高性能的太阳能驱动水蒸发。CDs 纳米流体从源水箱通过纸张向下传输，形成界面蒸发结构，确保蒸发过程中的持续供水。太阳能转换热量只集中在纸上的少量纳米流体上，因此对纳米流体的热量损失较小，而且达到稳定蒸发率的响应时间也很快，仅需 2 分钟。此外，纸上流动的纳米流体可吸收环境能量，在一个太阳照射下实现 1.93 kg m-2 h-1 的高速蒸发。这项研究为提高用于太阳能废水处理和海水淡化的体积加热系统的性能提供了一种有效策略。

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.