材料科学
光热治疗
蒸发器
制氢
蒸发
工艺工程
氢
太阳能
化学工程
润湿
蒸馏
余热
纳米技术
机械工程
复合材料
热力学
热交换器
工程类
有机化学
物理
化学
电气工程
作者
Yi Zhou,Tianpeng Ding,Minmin Gao,Kwok Hoe Chan,Yih–Shyang Cheng,Jiaqing He,Ghim Wei Ho
出处
期刊:Nano Energy
[Elsevier]
日期:2020-11-01
卷期号:77: 105102-105102
被引量:148
标识
DOI:10.1016/j.nanoen.2020.105102
摘要
The ability to control heterogeneous water distribution and evaporation could address low vapor generation issues which has great implications for distillation and energy systems efficiency. Herein, we devise an efficient solar-driven water-electricity-hydrogen generation system by spatially controlling water diffusion and evaporation of 3D hydrogel evaporators. Specifically, through template-assisted regulation of the interfacial structures of the hydrogel evaporator, the relationship between the macroscale liquid-vapor area and the water pumping pathway was studied. The hybrid wettability and distinct water distribution strategy achieved via selective hydrophobic-hydrophilic modification enhance the photothermal efficiency by 207% compared with the flat hydrophilic evaporator. Finally, the tailored hydrogels for contrasting evaporative cooling and solar absorption heating are integrated with Bi2Te3-based thermoelectric generator (TEG) to efficiently convert waste heat into electricity and drive electrochemical water splitting under outdoor sunny/cloudy conditions. The prototype demonstrates evaporation of 1.42 kg m−2 h−1, power output of 4.8 W/m2, and hydrogen evolution of 0.3 mmol/h. This work could pave the development of highly integrated hybrid systems to deliver three crucial water, energy and fuel commodities for global sustainability.
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