Turning Trash into Treasure: Pencil Waste–Derived Materials for Solar‐Powered Water Evaporation,Energy Technology

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Turning Trash into Treasure: Pencil Waste–Derived Materials for Solar‐Powered Water Evaporation
Energy Technology ( IF 3.6 ) Pub Date : 2020-08-19 , DOI: 10.1002/ente.202000567
Yi Lu ₁ , Tianyi Dai ₁ , Deqi Fan ₁ , Huihua Min ₂ , Shuai Ding ₁ , Xiaofei Yang _{1,

3}

Affiliation

Solar steam generation is regarded as one of the most attractive technologies to relieve the stress of freshwater storage. Low cost and scalable production of solar evaporators is a critical issue to be considered for practical applications. Herein, the recycling utilization of pencil wastes is proposed by a facile method. A self‐floating solar evaporator made of carbonized pencil wastes can achieve an evaporation rate of 1.2 kg m⁻² h⁻¹ and a light‐to‐vapor energy conversion efficiency of 82.2% under 1.0 sun. Meanwhile, the evaporator exhibits a self‐desalting property overnight due to its superior hydrophilicity. Furthermore, the evaporator manifests significantly effective solar evaporation performance in brine, organic dye solutions, as well as other harsh conditions. Considering the wide range of raw sources, low cost, scalable preparation, and effective solar evaporation performance, the all wood waste–based solar steam generator provides an inspiration for the recycling utilization of wood wastes and the promising development of environmentally friendly biomass‐based solar evaporators.

中文翻译：

将垃圾变成宝藏：铅笔废料衍生的太阳能蒸发水材料

太阳能蒸汽发电被认为是缓解淡水存储压力的最有吸引力的技术之一。太阳能蒸发器的低成本和可扩展生产是实际应用中要考虑的关键问题。在此，通过简便的方法提出了铅笔废料的回收利用。由碳化铅笔废料制成的自浮式太阳能蒸发器可实现1.2 kg m ^-2 h ^-1的蒸发速率在1.0阳光下的光汽能量转换效率为82.2％。同时，由于其优越的亲水性，蒸发器在一夜之间表现出自脱盐性能。此外，该蒸发器在盐水，有机染料溶液以及其他恶劣条件下表现出非常有效的太阳蒸发性能。考虑到原材料来源广泛，成本低廉，制备规模可扩展以及有效的太阳能蒸发性能，所有基于木材废料的太阳能蒸汽发生器为木材废料的回收利用和环保型生物质太阳能的发展提供了灵感蒸发器。

更新日期：2020-10-05

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