Breath‐Figure Self‐Assembled Low‐Cost Janus Fabrics for Highly Efficient and Stable Solar Desalination

Tian, Yan; Li, Yiju; Zhang, Xinyue; Jia, Jie; Yang, Xin; Yang, Shuying; Yu, Jianyong; Wu, Dequn; Wang, Xueli; Gao, Tingting; Li, Faxue

doi:10.1002/adfm.202113258

Cited by 97 publications

(53 citation statements)

References 74 publications

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“…The developed J-PDFP exhibits multitasking applications, including stable self-floating, salt resistance, heat management, and pollutant degradation and comprehensive advantages. 10,59–62…”

Section: Resultsmentioning

confidence: 99%

Toward multitasking solar desalination: a Janus and scalable paper evaporator with light trapping, heat confinement, salt resistance, and pollutant degradation

Wang

Xing

et al. 2023

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 99%

Toward multitasking solar desalination: a Janus and scalable paper evaporator with light trapping, heat confinement, salt resistance, and pollutant degradation

Wang

Xing

et al. 2023

J. Mater. Chem. A

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“…In other words, with the addition of PPy and heat localization design, the evaporation rate of our device can increase by up to 1.2 times compared with that of CMS (floating on solution). Both the evaporation rate and photothermal efficiency in this work are higher than most of the other recent works, ,,,− as shown in Figure d. Figure e shows the performance durability of the HRF-assisted PMCS SVG device in 10 times of testing.…”

Section: Results and Discussionmentioning

confidence: 99%

Efficient Solar Vapor Generation under One Sun with Surrounding Heating

Yang

Zhang

et al. 2022

ACS Sustainable Chem. Eng.

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Solar vapor generation is one of the environmentally friendly methods to absorb solar energy and produce clean water. Yet the water yield and low salt tolerance of the device fundamentally limit its practical applications. Herein, we designed a bilayer device composed of a thickness-optimized polypyrrole-modified carbon sponge chip (PMCS) (as the vapor generation layer) and a heat reflective film (HRF) (as the thermal insulation layer). The coated polypyrrole increases the absorption efficiency and reduces the vaporization enthalpy of water, thus improving the water yield by 26%. The HRF reduces the heat loss via a novel surrounding heating effect, which increases the water yield by 64%. We further enhance the heat localization by downsizing the thickness of PMCS from 6 mm to 1 mm, which increases the water yield by 27%. With all these merits, the PMCS-HRF device performs an efficient solar vapor generation with a water yield of 2.10 kg m–2 h–1 and a photothermal efficiency of 94%. Moreover, the bilayer device exhibits good salt tolerance, which maintains 1.87 kg m–2 h–1 (with a retention >90%) after a continuous 12 h of solar illumination.

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“…2) Salt ions can interact with the PMH2, which inhibits, to some extent, the upward diffusion of ions. [30,54] Some possible underlying mechanisms on salt resistance have been revealed, such as hydrophobic/hydrophilic surface/interface design, [13,55,56] and macropores or channels engineering as salt regenerating channels from natural structure (e.g., balsa wood or artificial macropores inspired by nature). [29,30,32,33] Besides breaking the hydrogen bonds within PVA chains of evaporator as revealed above, the chaotropic Cl − in brine can also influence the hydrophobic groups of PVA chains.…”

Section: −mentioning

confidence: 99%

Hofmeister Effect‐Enhanced Hydration Chemistry of Hydrogel for High‐Efficiency Solar‐Driven Interfacial Desalination

et al. 2022

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extensive attention as one of the hot topics in fast-growing disciplines. [7][8][9][10][11][12] A typical SDIE system contains solar absorber (i.e., photothermal materials), substrate, and bulk water. The absorber materials convert the incident light into heat, which will heat the water at the air/absorber interface and drive the continuous water evaporation. The substrates implement the water transport and replenishment, meanwhile work as the thermal-insulating materials. An ideal evaporator should have some required attributes, including broadband solar absorption, efficient photothermal conversion, rapid water transport, and excellent heat insulation. [13] The photothermal materials for SDIE mainly include plasmonic metals, [10,14,15] semiconductor, [16,17] and carbon materials. [18][19][20][21][22] Carbon materials, represented by graphene oxide (GO), [23][24][25] are the most competitive candidates due to their low cost, excellent photothermal property, and high processability. The photothermal conversion mechanism of carbon materials is ascribed to the lattice vibration of carbon framework, which is triggered by the excitation of photo-induced electrons from the highest occupied molecular orbital to the lowest unoccupied molecular orbital and the subsequent relaxation process. [13] When the lattice points of carbon atoms are collided with the relaxation electrons, carbon atoms will vibrate. Generally, the vibrational amplitude of the carbon lattice points can be improved by the larger lattice spacing, thus facilitating the solar-to-heat conversion. Biomass materials, in particular woods, hold advantages of structural composition, including abundant microchannels, low thermal conductivity, low density, and high hydrophilicity. [26,27] Thus, woods show great potential as thermally insulative substrates for SDIE. [22,28] However, the intrinsically low solar absorbance of natural woods impedes their further solar applications. [29,30] As such, extensive efforts have been done to improve the solar absorption capability of woods, such as surface modification. [31,32] Hu's group has proposed a "treelike design" principle to implement solar desalination by horizontally cutting the natural wood and selectively carbonizing the top surface to fabricate a two-layered solar evaporator. [33] Although the solar evaporator initially works in salted water, the salt can easily crystallize and accumulate on the evaporative surface with the continuous water evaporation, which Solar-driven water evaporation technology holds great potential for mitigating the global water scarcity due to its high energy conversion efficiency. Lowering the vaporization enthalpy of water is key to boost the performance of solar-driven desalination. Herein, a highly hydratable hydrogel (PMH) network, consisting of modified needle coke as photothermal material and polyvinyl alcohol (PVA) as hydratable matrix, is crafted via simple physical cross-linking method. When capitalizing on the PMH as evaporator for 3.5 wt% NaCl solution, a high evaporation ...

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Breath‐Figure Self‐Assembled Low‐Cost Janus Fabrics for Highly Efficient and Stable Solar Desalination

Cited by 97 publications

References 74 publications

Toward multitasking solar desalination: a Janus and scalable paper evaporator with light trapping, heat confinement, salt resistance, and pollutant degradation

Toward multitasking solar desalination: a Janus and scalable paper evaporator with light trapping, heat confinement, salt resistance, and pollutant degradation

Efficient Solar Vapor Generation under One Sun with Surrounding Heating

Hofmeister Effect‐Enhanced Hydration Chemistry of Hydrogel for High‐Efficiency Solar‐Driven Interfacial Desalination

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