TiO2 nanoparticle coated carbon nanotube sponge with high sunlight absorption and good hydrophilicity for efficient interfacial solar-powered vapor generation

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces Pub Date : 2024-11-22 DOI:10.1016/j.surfin.2024.105495

Hao Xun , Chen Wu , Zhaohui Yang , Xiaohua Zhang

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引用次数: 0

Abstract

Solar-powered interfacial vapor generation is considered a promising sustainable energy technology. We use porous TiO₂ nanoparticle coated carbon nanotube sponges (CNTS@TiO₂) as sunlight absorbers to study solar-powered interfacial vapor generation due to the extremely strong sunlight absorption of CNTs and TiO₂. The highly porous structures have great benefits to water transport in the sunlight absorbers. The formation of TiO₂ on the sidewalls of CNTs improves the hydrophilicity of the light absorber and wettability of water on the sidewalls of CNTs. The water can rapidly infiltrate the porous CNTS@TiO₂ composites. Additionally, the multiple internal reflections in “TiO₂ forest” greatly reduce the diffused reflection and thus enhance sunlight absorption. The CNTS@TiO₂ composites exhibit high sunlight absorption (96.7 %). The efficient water transport and strong light absorption in the porous light absorbers significantly improved the evaporation performance. The CNTS@TiO₂ composite with the rhombic TiO₂ shows high water evaporation rate of 3.15 ± 0.14 kg m^-2 h^-1 and energy transfer efficiency of 89.5 ± 3.9 % under 1-sun radiation.

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具有高日光吸收率和良好亲水性的 TiO2 纳米粒子涂层碳纳米管海绵，可用于高效的界面太阳能蒸汽发电

太阳能驱动的界面蒸汽发生被认为是一种前景广阔的可持续能源技术。由于碳纳米管和二氧化钛对阳光有极强的吸收能力，我们使用多孔二氧化钛纳米粒子包覆碳纳米管海绵（CNTS@TiO2）作为阳光吸收体，研究太阳能驱动的界面蒸汽发生。高多孔结构对阳光吸收器中的水传输有很大好处。在 CNT 的侧壁上形成的 TiO2 提高了光吸收器的亲水性和水在 CNT 侧壁上的润湿性。水可以迅速渗入多孔 CNTS@TiO2 复合材料。此外，"TiO2 森林 "中的多重内反射大大减少了漫反射，从而增强了对阳光的吸收。CNTS@TiO2 复合材料对阳光的吸收率高达 96.7%。多孔吸光层中高效的水分传输和强大的光吸收能力显著改善了蒸发性能。带有菱形 TiO2 的 CNTS@TiO2 复合材料在 1 太阳辐射下的水蒸发率高达 3.15 ± 0.14 kg m-2 h-1，能量传递效率为 89.5 ± 3.9 %。

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来源期刊

Surfaces and Interfaces Chemistry-General Chemistry

CiteScore

8.50

自引率

6.50%

发文量

753

审稿时长

35 days

期刊介绍： The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results. Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)