Functionalized biomass-derived composites for solar vapor generation

Wang, Xinyu; Sha, Changchang; Wang, Wenju; Chen, Yuchao; Yu, Yihao; Fan, Desong

doi:10.1088/2053-1591/ab586e

Cited by 22 publications

(9 citation statements)

References 44 publications

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“…Due to the natural shape of some materials, it is not possible to use them alone for evaporation and therefore an additional material must be used to maintain the evaporative surface above the water [5,[31][32][33][34][35]. This can be a standard foam for thermal insulation, which has the ability to float on water but also allows less heat exchange with water due to its very low thermal conductivity.…”

Section: Insulation Under the Materialsmentioning

confidence: 99%

Modelling heat and mass transfer in solar evaporation systems

Fillet

Nicolas

Fierro

et al. 2021

International Journal of Heat and Mass Transfer

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Section: Insulation Under the Materialsmentioning

confidence: 99%

Modelling heat and mass transfer in solar evaporation systems

Fillet

Nicolas

Fierro

et al. 2021

International Journal of Heat and Mass Transfer

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“…Various carbon materials are obtained by pyrolysis or carbonization of biomasses for solar-driven water evaporation. [32] For example, Liu and coworkers reported a superior light absorber by pyrolysis of the upper leaves of waste rice straw at high temperature and the lower culms are designed as excellent water pumps, the unique structure resulting in a evaporation rate of 1.2 kg m À2 h À1 . [33] Gu and coworkers revealed that bamboo can be an excellent 3D solar vapor-generation device with an extremely high evaporation rate of 3.13 kg m À2 h À1 under 1 sun irradiation by a three-step carbonization method, and the bamboo-based evaporator has the advantages of low-cost, self-cleaning, solid durable, and scalable.…”

Section: Introductionmentioning

confidence: 99%

Concentrated Acid‐Induced Dehydration of Fallen Leaves for Efficient, Sustainable, and Self‐Cleaning Solar Steam Generation

Shan

Xiong

Sheng

et al. 2020

Adv Energy and Sustain Res

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To develop solar steam generation (SGG) for water treatment, light absorbers have been widely synthesized by carbonization of plants at high temperature. However, the thermal treatment has high energy‐consumption and is environmentally unfriendly. Thus, it is urgent to explore new green approaches to convert biomasses to carbon materials for SSG. Herein, a concentrated acid‐induced dehydration method is developed to convert fallen leaves to carbon powders, fallen‐leaf photothermal film prepared by dehydration (FLPD). The resultant FLPD exhibits a strong absorption covering a wide spectrum. It also contains sufficient oxygen‐containing groups on the surface, leading to low water evaporation enthalpy. To meet the demands of practical applications, the FLPD membrane is modified with polyvinyl alcohol (PVA) to improve the mechanical stabilities and the surface wettability is further enhanced by an oxygen plasma treatment. An SSG device based on the modified membrane attains a competitive evaporation rate of 1.355 kg m−2 h−1 under 1 sun irradiation. The evaporation rate remains approximately constant when evaporating the seawater. Moreover, the salt deposited on the surface could be self‐cleaned due to the high wettability. Therefore, herein, it is demonstrated that concentrated acid‐induced dehydration is an effective and green approach to convert cheap biomasses to carbon materials for SSG applications.

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“…Thus, the phenomenon has been observed in the previous report; for instance, He et al found that the degree of defect increased by high-temperature calcination, and the light absorption increased from 71 to 98%. , Meanwhile, the 1324 cm –1 band of reference CNTs shows a red shift to 1310 cm –1 of Fe/CNTs, which can be explained by the intercalation of metal ions in CNTs. Similarly, the peaks of TiO 2 /CNTs were slightly shifted relative to the pure CNTs, indicating the intercalation of TiO 2 in CNTs . In addition, compared with the reference CNT, the Fe/CNT architecture exerts higher UV–vis–NIR spectra (93.0% vs 92.2%) (Figure S12), resulting in higher light-to-heat of Fe/CNT hybrids than reference CNTs (63.9 vs 56.5 °C) (Figure h).…”

Section: Resultsmentioning

confidence: 99%

Enhancing Freshwater Production via Customizable and Highly Efficient Solar-Driven Seawater Desalination

Wang

Shang

Sun

et al. 2023

ACS Appl. Mater. Interfaces

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Solar-powered water generation is an appealing strategy for cost-effective and energy-sustainable seawater purification/desalination, where rational material selection and device design is crucial. Nevertheless, prevailing carbon-based photothermal materials in such systems still suffer from mediocre steam-to-water efficiency, failing to satisfy an adequate freshwater supply. Herein, we demonstrate a biomimetic corrugated evaporator (CE) affording carbon nanotube (CNT) encapsulated Fe nanocluster-decoration in the pursuit of high-efficiency seawater purification. The thus-customized CE demonstrates a maximum evaporation rate of 4.2 kg m–2 h–1 with a refraction angle of 60° and a water-lifting height of 5.5 cm, outperforming most state-of-the-art carbon-based counterparts. By employing a tailored architectural design and optimized condensing volume, the steam-to-water efficiency increases from 65.8 to 88.2% as the volume enlarges from 0.8 to 5.3 L, further harvesting a peak value of 91% under negative pressure. Light intensity simulation and experimental mechanistic investigation disclose the dual property-performance relationships between evaporator microstructure and evaporation rate, as well as between condensing device volume and steam-to-water efficiency. The universality of the theoretical guidance of this work will offer insight into the development of solar-driven evaporator construction toward simultaneous seawater desalination and clean water generation.

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Functionalized biomass-derived composites for solar vapor generation

Cited by 22 publications

References 44 publications

Modelling heat and mass transfer in solar evaporation systems

Modelling heat and mass transfer in solar evaporation systems

Concentrated Acid‐Induced Dehydration of Fallen Leaves for Efficient, Sustainable, and Self‐Cleaning Solar Steam Generation

Enhancing Freshwater Production via Customizable and Highly Efficient Solar-Driven Seawater Desalination

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