Bioinspired Soot‐Deposited Janus Fabrics for Sustainable Solar Steam Generation with Salt‐Rejection

Gao, Shouwei; Dong, Xiuli; Huang, Jianying; Dong, J.; Maggio, Francesco; Wang, Shanchi; Guo, Fang; Zhu, Tianxue; Chen, Zhong; Lai, Yuekun

doi:10.1002/gch2.201800117

Cited by 79 publications

(49 citation statements)

References 47 publications

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“…For example, the difference in structure can be used to achieve the purpose of hydrophobic, such as the use of soot and cotton fiber to interweave to achieve a hydrophobic system. [ 128 ] Experiments showed that under 5 h of simulated sunlight, no salt was produced on the surface of the evaporator after 20 d. The prepared Janus evaporator also had a continuous evaporation capacity of 1.375 kg m −2 h −1 and an efficiency of 86.3% during 1 d under 1 kW m −2 radiation. It also performed well under low‐intensity and oblique radiation.…”

Section: Salt Mitigation Strategiesmentioning

confidence: 99%

Salt Mitigation Strategies of Solar‐Driven Interfacial Desalination

Wang

et al. 2020

Adv Funct Materials

205

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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Section: Salt Mitigation Strategiesmentioning

confidence: 99%

Salt Mitigation Strategies of Solar‐Driven Interfacial Desalination

Wang

et al. 2020

Adv Funct Materials

205

102

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“…Owing to the pores among fibers and their hydrophilicity, the cotton fabric enables fast water transport via the capillary effect (Figure 10A). Different photothermal materials can be anchored onto the cotton fabric for solar evaporation, such as PPy via in-situ polymerization (Figure 10B, C) [6,18] , MoS 2 via hydrothermal self-growth method [106] , and soot via exposure to candle flame [105,107] . The rough surface of cotton fabric provides a large surface area for loading photothermal materials and increases the light reflection among photothermal materials.…”

Section: 6mentioning

confidence: 99%

“…[104] Various architectures can be obtained in cotton fabric by simply cutting using scissors [27]. The price for plain cotton is about $0.55 m −2 ,[105] which makes it viable for practical applications. Owing to the pores among fibers and their hydrophilicity, the cotton fabric enables fast water transport via the capillary effect (Figure 10A).…”

Section: Applications Of Cellulosic Nanomaterials In Solar Steam Generationmentioning

confidence: 99%

Cellulose Nanomaterials in Interfacial Evaporators for Desalination: A “Natural” Choice

et al. 2020

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Herein, the recent advances in realizing highly efficient cellulose-based solar evaporators for alleviating the global water crisis are summarized. Fresh water scarcity is one of most threatening issues for sustainable development. Solar steam generation, which harnesses the abundant sunlight, has been recognized as a sustainable approach to harvest fresh water. In contrast to synthetic polymeric materials that can pose serious negative environmental impacts, cellulose-based materials, owing to their biocompatibility, renewability, and sustainability, are highly attractive for realizing solar steam generators. The molecular and macromolecular features of cellulose and the physicochemical properties of extracted cellulose nanoparticles (cellulose nanocrystals and cellulose nanofibrils) and natural cellulose materials (wood and bacterial nanocellulose) that make them attractive as supporting substrate materials in solar steam generators are briefly discussed. Recent progress in designing highly efficient cellulose-based solar evaporators, including utilizing the extracted cellulose nanoparticles via bottom-up assembly (cellulose nanofibrils), natural cellulose materials with intrinsic hierarchical structure (wood and bacterial nanocellulose), and commercial planar cellulose substrates (air-laid paper, cellulose paper and cotton fabric) is reviewed. The outstanding challenges that need to be addressed for these materials and devices to be utilized in the real-world and in overcoming global water crisis are also briefly highlighted.

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“…Better heat regulation may reduce thermal loss to the environment to a great extent, thereby collecting more solar energy and converting it directly into the enthalpy of liquid evaporation and improving the efficiency of thermal evaporation. In order to suppress radiation loss, the ideal solar absorber must possess low thermal emissivity and high incident light absorption, which can be realised by high reflectance at the long-wave infrared region [54]. The heat loss of a solar absorber is caused by heat radiation, which increases at high temperatures.…”

Section: Solar-thermal Conversion Mechanisms and Evaluation Standardsmentioning

confidence: 99%

Solar-thermal conversion and steam generation: a review

Shi

Wang

et al. 2020

Applied Thermal Engineering

127

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Highlights  Solar absorbed materials and their photo-thermal conversion mechanism are reviewed.  The evaluation principle of photo-thermal conversion process are investigated.  Different solar absorbed evaporation methods and system are summarized.  The prospects and challenges of photo-thermal conversion and steam generation are discussed Abstract: Recently, steam generation systems based on solar-thermal conversion have received much interest, and this may be due to the widespread use of solar energy and water sources such as oceans and lakes. The photo-thermal desalination system becomes attractive as it can convert absorbed solar light energy into thermal energy and realise the desalination and water purification of saline water through the evaporation process. In this paper, the research status of solar-thermal conversion materials such as metal-based materials, semiconductor materials, carbon-base materials, organic polymer materials, composite photo-thermal materials and their solar-thermal conversion mechanism in recent years are reviewed. The physical process and evaluation principle of solar-thermal conversion are both carefully introduced. The methods of optimising thermal management and increasing the evaporation rate of a hybrid system are also introduced in detail. Four main applications of solar-thermal conversion technologies (seawater desalination, wastewater purification, sterilisation and power generation) are discussed. Finally, based on the above analysis, the prospects and challenges for future research in the field of desalination are discussed from an engineering and scientific viewpoint to promote the direction of research, in order to stimulate future development and accelerate commercial application.

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Bioinspired Soot‐Deposited Janus Fabrics for Sustainable Solar Steam Generation with Salt‐Rejection

Cited by 79 publications

References 47 publications

Salt Mitigation Strategies of Solar‐Driven Interfacial Desalination

Salt Mitigation Strategies of Solar‐Driven Interfacial Desalination

Cellulose Nanomaterials in Interfacial Evaporators for Desalination: A “Natural” Choice

Solar-thermal conversion and steam generation: a review

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