首页|Solar-driven salt-free deposition evaporation for simultaneous desalination and electricity generation based on tip-effect and siphon-effect

Solar-driven salt-free deposition evaporation for simultaneous desalination and electricity generation based on tip-effect and siphon-effect

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Solar-driven desalination is a promising way to alleviate the freshwater shortage,while is facing chal-lenges posed by low evaporation rates and severe salt accumulation.Herein,a high-performance two-dimensional(2D)solar absorber with Co3O4 nanoneedle arrays(Co3O4-NN)grown on the surface of reduced graphene oxide-coated pyrolyzed silk cloth(Co3O4-NN/rGO/PSC)was prepared,and a salt-free evaporator system was assembled based on the composite material and siphonage-the flowing water delivery.It is revealed that the evaporation enthalpy of water can be reduced over the 2D solar absorber grown with Co3O4-NN,enabling an evaporation rate of up to 2.35 kg m-2 h-1 in DI water under one solar irradiation.The desalination process can be carried out continuously even with salt concentration up to 20 wt％,due to the timely removal of concentrated brine from the interface with the assistance of directed flowing water.Moreover,the 2D structure and the flowing water also provide an opportunity to convert waste solar heat into electricity in the evaporator based on the seebeck effect,ensuring simultaneous freshwater production and power generation.It is believed that this work provides insights into design-ing hybrid systems with high evaporation rate,salt resistance,and electricity generation.

Co3O4 nanoneedle arraysSolar water evaporationEvaporation enthalpySalt freeSiphon effectPower generation

Wan Xue、Zongbin Zhao、Guanyu Zhao、Honghui Bi、Huijun Zhu、Xuzhen Wang、Jieshan Qiu

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State Key Laboratory of Fine Chemicals,Liaoning Key Laboratory for Energy Materials and Chemical Engineering,School of Chemical Engineering,Dalian University of Technology,Dalian 11 6024,Liaoning,China

State Key Laboratory of Fine Chemicals,Liaoning Key Laboratory for Energy Materials and Chemical Engineering,School of Chemistry,Dalian University of Technology,Dalian 116024,Liaoning,China

State Key Laboratory of Chemical Resource Engineering College of Chemical Engineering,Beijing University of Chemical Technology,Beijing 100029,China

2024

10.1016/j.jechem.2024.06.044

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.98(11)