A novel chitosan/Chinese ink composite aerogels: Preparation and application for solar steam generators

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-02-07 DOI:10.1016/j.colsurfa.2025.136322

Xin Yi, Yanping Wang, Yuqin. Teng, Yimin Qu, Dajian Huang, Xiaohu Qiang

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引用次数: 0

Abstract

The use of carbon-based materials as photothermal components in solar steam generators faces challenges such as complex preparation processes and pollution during carbonization. To overcome these issues, a one-pot green immersion preparation process was developed, incorporating carbon nanoparticles from traditional Chinese ink (CI) with photothermal properties into chitosan (CS) aerogels for steam generation under sunlight. The resulting three-dimensional sponge-like porous structure features oriented two-dimensional water transport channels, enabling rapid water pumping and multiple light path refractions within the aerogel. The carbon nanoparticles in CI were shown to disperse uniformly in the CS matrix. This lightweight aerogel, characterized by low thermal conductivity, achieves an evaporation rate of 2.13 kg m⁻² h⁻¹ under 1.0 sunlight, demonstrating high efficiency in treating seawater with high salinity, strong acid/base solutions, and dye-containing wastewater. The aerogel minimizes heat loss during solar evaporation and achieves effective self-desalination during the desalination process. Utilizing simple and green CI as a photothermal material offers a sustainable and cost-effective approach to address global water and energy shortages.

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新型壳聚糖/油墨复合气凝胶的制备及其在太阳能蒸汽发生器中的应用

在太阳能蒸汽发生器中使用碳基材料作为光热组件面临着制备工艺复杂和炭化过程污染等挑战。为了克服这些问题，开发了一种一锅绿色浸泡制备工艺，将具有光热性能的传统墨汁（CI）中的碳纳米颗粒加入壳聚糖（CS）气凝胶中，在阳光下产生蒸汽。由此产生的三维海绵状多孔结构具有定向的二维输水通道，可以在气凝胶内快速抽水和多次光路折射。碳纳米颗粒均匀地分散在CS基体中。这种轻质气凝胶具有导热性低的特点，在1.0个阳光照射下，蒸发速率为2.13 kg m−2 h−1，在处理高盐度海水、强酸/强碱溶液和含染料废水方面表现出高效率。气凝胶最大限度地减少了太阳能蒸发过程中的热量损失，并在脱盐过程中实现了有效的自脱盐。利用简单的绿色CI作为光热材料，为解决全球水和能源短缺问题提供了一种可持续的、具有成本效益的方法。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.