Superhydrophilic porous carbon foam as a self-desalting monolithic solar steam generation device with high energy efficiency

Wang, Chengbing; Wang, Jiulong; Li, Zhengtong; Xu, Keyuan; Lei, Tao; Wang, Weike

doi:10.1039/d0ta01439g

Cited by 185 publications

(68 citation statements)

References 45 publications

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“…T av of 3D S‐CPF evaporator (29.5 °C) was also lower than those of many previous reported 2D planar evaporators and 3D evaporators. [ 1c,2c,4a,6b,10b,e,27 ] According to Stefan–Boltzmann formula and Newton's law of cooling, lower surface temperature is conducive to reduce energy loss including radiation and convection. Besides, T av for the upper half of 3D S‐CPF evaporator was lower than that for whole 3D H‐CPF evaporator (Figure S7a, Supporting Information), which indicated that the upper half of 3D S‐CPF evaporator possessed low heat loss compared with whole 3D H‐CPF evaporator.…”

Section: Resultsmentioning

confidence: 99%

“…In recent years, solar steam generation has drawn much attention due to its potential applications in desalination, [ 1 ] wastewater treatment, [ 2 ] and power generation. [ 3 ] Various 2D solar evaporators with excellent light absorption, [ 4 ] low heat conduction loss, [ 5 ] salt‐rejecting property, [ 6 ] stability, [ 7 ] and low cost [ 8 ] have been designed. However, inevitable energy loss such as reflection and radiation, enabled the evaporation efficiency of 2D solar evaporators to reach its upper limit.…”

Section: Introductionmentioning

confidence: 99%

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A Low‐Cost 3D Spherical Evaporator with Unique Surface Topology and Inner Structure for Solar Water Evaporation‐Assisted Dye Wastewater Treatment

Yuan

Zhang

Liang

et al. 2020

Advanced Sustainable Systems

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Solar steam generation and adsorption, as promising technologies to tackle water pollution, have gained increasing research interest in recent years. In this paper, 3D spherical carbonized platanus fruit with special surface topology and inner interconnected porous structure is used as a superior solar evaporator and an adsorbent for dye removal with easy separation from treated water. The dual‐functional material with single component is prepared by a simply carbonizing biowaste platanus fruit. A high evaporation rate up to 2.00 kg m−2 h−1 under one sun is achieved by 3D spherical evaporator. 3D evaporator also presents outstanding water evaporation under low light intensity, angle‐independent water evaporation, and long‐term cycling stability. Importantly, high‐capacity dye adsorption and generation of purified water are simultaneously achieved with the assistance of solar‐driven evaporation under one sun. Thus, the monolithic, dual‐functional 3D material with a simple preparation process, low cost, mechanical robustness, and environmental friendliness has great potential for solar steam generation and solar water evaporation‐assisted adsorption. This study proposes a simple route to design 3D solar evaporators with surface topology and innovatively provides a high‐efficiency method for tackling water pollution.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Low‐Cost 3D Spherical Evaporator with Unique Surface Topology and Inner Structure for Solar Water Evaporation‐Assisted Dye Wastewater Treatment

Yuan

Zhang

Liang

et al. 2020

Advanced Sustainable Systems

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“…Recently, Wang's group reported a self‐floating superhydrophilic porous carbon foam (SPCF) obtained by carbonizing potatoes through a one‐step calcination method, which demonstrated excellent salt resistance. [ 90 ] This device has a highly open interconnect structure and a large channel structure, which provides supercapillary force. In addition, the carbonized potatoes can float on the water because of their ultralow density, and the salt water is continuously pumped to the surface.…”

Section: Salt Mitigation Strategiesmentioning

confidence: 99%

Salt Mitigation Strategies of Solar‐Driven Interfacial Desalination

Wang

et al. 2020

Adv Funct Materials

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190

102

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Solar‐driven interfacial desalination (SDID), which is based on localized heating and interfacial evaporation, provides an opportunity for developing environmentally friendly and cost‐effective seawater thermal desalination. However, localized heating and rapidly generated interfacial steam may cause salt to accumulate on the evaporator's surface and block the channel of steam evaporation. Salt accumulation inevitably reduces the light absorption and service period of the solar absorber, resulting in a significant decrease in evaporation efficiency over time. Salt accumulation makes it difficult to produce SDID devices with high energy efficiency and long‐term stability for large‐scale use in remote poverty‐stricken areas. Therefore, the exploration of novel and effective strategies for addressing salt accumulation through both material design and structural engineering has attracted more attention in recent years. This review presents an overview of the state‐of‐the‐art advancements in salt‐resistant photothermal evaporation and discusses the critical issues for achieving salt mitigation SDID, focusing on the classification of salt mitigation strategies based on photothermal evaporation configurations, the basic mechanism of salt mitigation, and the architectural design of photothermal materials. Finally, the important challenges and prospects of SDID are discussed to providing a meaningful roadmap to efficient salt mitigation SDID.

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“…Light absorption efficiency for SPCF was calculated up to (96.19%) with superfast solar‐thermal conversion capability (up to 92.7 °C temperature elevation under 2 sun illumination within 10 s), excellent mechanical robustness and reduced thermal conductivity, with an energy efficiency of 86% under one sun illumination equipped with a simultaneous response of salt resisting during vapor generation were obtained. [ 48 ] Jang, Gyoung Gag et al. (2019), reported a scalable direct solar thermal carbon distillation (DS‐CD) tubular devices, manufactured via microporous graphite foam coated with carbon nanoparticle.…”

Section: Nanoenabled Photothermal Materialsmentioning

confidence: 99%

Nanoenabled Photothermal Materials for Clean Water Production

2020

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Solar‐powered water evaporation is a primitive technology but interest has revived in the last five years due to the use of nanoenabled photothermal absorbers. The cutting‐edge nanoenabled photothermal materials can exploit a full spectrum of solar radiation with exceptionally high photothermal conversion efficiency. Additionally, photothermal design through heat management and the hierarchy of smooth water‐flow channels have evolved in parallel. Indeed, the integration of all desirable functions into one photothermal layer remains an essential challenge for an effective yield of clean water in remote‐sensing areas. Some nanoenabled photothermal prototypes equipped with unprecedented water evaporation rates have been reported recently for clean water production. Many barriers and difficulties remain, despite the latest scientific and practical implementation developments. This Review seeks to inspire nanoenvironmental research communities to drive onward toward real‐time solar‐driven clean water production.

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Superhydrophilic porous carbon foam as a self-desalting monolithic solar steam generation device with high energy efficiency

Abstract: Superhydrophilic porous carbon foam was successfully synthesized by facile carbonization of potato, providing a new perspective to design self-desalting monolithic ISSG to satisfy the demand for highly efficient and enduring solar desalination.

Cited by 185 publications

References 45 publications

A Low‐Cost 3D Spherical Evaporator with Unique Surface Topology and Inner Structure for Solar Water Evaporation‐Assisted Dye Wastewater Treatment

A Low‐Cost 3D Spherical Evaporator with Unique Surface Topology and Inner Structure for Solar Water Evaporation‐Assisted Dye Wastewater Treatment

Salt Mitigation Strategies of Solar‐Driven Interfacial Desalination

Nanoenabled Photothermal Materials for Clean Water Production

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