Development of an innovative MnO2 nanorod for efficient solar vapor generator

Environmental Functional Materials Pub Date : 2022-06-01 DOI:10.1016/j.efmat.2022.08.001

Casey Onggowarsito, An Feng, Shudi Mao, Stella Zhang, Idris Ibrahim, Leonard Tijing, Qiang Fu, Huu Hao Ngo

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引用次数: 2

Abstract

Finding an efficient water harvesting technique is currently highly sought-after due to the rise of water demand. Solar vapor generators (SVGs) have recently shown promising results to be used as a cleaner alternative water harvesting system for desalination application. However, recent SVGs using semiconductor as photo-thermal materials (PTMs) still suffer from a low average water evaporation performance. This study aims to develop a novel high-water generating hydrogel-based SVG consisting of cross-linked polyvinyl alcohol (PVA) matrix and designed MnO₂ nanorods as solar-to-heat converter. Results indicated that the resultant hydrogel material exhibited a maximum water evaporation rate of 2.8 kg/(m²·h) under 1 sun. Furthermore, the PVA/MnO₂ hydrogel demonstrated salt resistant and filtration capability for desalination application with a consistent evaporation rate of 2.8 kg/(m²·h) and >99.8% reduction of sodium ion concentration. In short, this study opens up a new pathway for the development of high performance SVG system for desalination applications.

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高效太阳能蒸汽发生器用二氧化锰纳米棒的研制

由于水需求的增加，寻找一种有效的集水技术目前备受追捧。太阳能蒸汽发生器（SVG）最近显示出了很有希望的结果，可以用作海水淡化应用的更清洁的替代集水系统。然而，最近使用半导体作为光热材料（PTM）的SVG仍然存在平均水蒸发性能低的问题。本研究旨在开发一种新型的基于高吸水水凝胶的SVG，该SVG由交联聚乙烯醇（PVA）基质和设计的MnO2纳米棒组成，作为太阳能-热转换器。结果表明，所得水凝胶材料表现出2.8的最大水蒸发率kg/（m2·h）。此外，PVA/MnO2水凝胶在脱盐应用中表现出耐盐和过滤能力，蒸发率一致为2.8kg/（m2·h）和>；钠离子浓度降低99.8%。总之，本研究为开发用于海水淡化应用的高性能SVG系统开辟了一条新的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Environmental Functional Materials

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