Metal-free functionalized carbonized cotton for efficient solar steam generation and wastewater treatment

Kiriarachchi, Hiran D.; Hassan, Amr; Awad, Fathi S.; El‐Shall, M. Samy

doi:10.1039/d1ra08438k

Cited by 17 publications

(8 citation statements)

References 52 publications

(67 reference statements)

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“…Cotton has strong hydrophilicity, low thermal conductivity and good stability, and is considered to be a good precursor of SSG [ 21 ]. Due to the effect of the capillary phenomenon, cotton can transport a continuous flow of water to the thermal interface, and can also prevent the transfer of heat to water [ 22 ]. In addition to cotton, the efficiency of SSG can also be improved by selecting different photothermal conversion materials.…”

Section: Introductionmentioning

confidence: 99%

Fe3O4/Diatomite-Decorated Cotton Evaporator for Continuous Solar Steam Generation and Water Treatment

Bai

Xu²,

Yang

et al. 2022

Materials

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Improving the evaporation rate of solar steam generation (SSG) has always been a research hotspot to solve the shortage of water resources. Using cotton, Fe3O4, polyvinyl alcohol (PVA) and diatomite (DM) as raw materials, DM/PVA/Fe3O4@cotton composites with both firmness and hydrophilicity were prepared. Fe3O4 has a wide range of light absorption characteristics and good photothermal conversion performance, and is an ideal photothermal conversion material. PVA enhances the adhesion between Fe3O4, cotton and DM and enhances the hardness of the sample and the internal porous structure. The existence of DM greatly improves the hydrophilicity of the sample, ensuring that the water in the lower layer can be continuously transported to the surface of the sample, and DM makes the surface of the sample rough, which reduces the reflection of sunlight and improves the efficiency of light heat conversion. Under one-sun irradiation, the temperature of the sample surface increases by 52.6 °C, the evaporation rate can reach 1.32 kg m−2 h−1 and the evaporation efficiency is 82.9%. Using this sample as the photothermal conversion layer of the SSG device, the removal rate of salt ions in seawater is more than 98% and the removal rate of heavy metal ions in sewage is close to 100%. This work provides a new idea and design method for SSG in the field of seawater desalination and sewage treatment.

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Section: Introductionmentioning

confidence: 99%

Fe3O4/Diatomite-Decorated Cotton Evaporator for Continuous Solar Steam Generation and Water Treatment

Bai

Xu²,

Yang

et al. 2022

Materials

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“…(b) ER under different solar intensities. (c) Comparisons of our current work with other recently reported works under 1 sum illunination. − ,− ,− ,− (d) Biomimetic evaporator device working under the natural sun. (e) ER at different times during the day.…”

Section: Resultsmentioning

confidence: 87%

Enhancing Solar-Driven Water Purification by Multiscale Biomimetic Evaporators Featuring Lamellar MoS₂/GO Heterojunctions

Zheng,

Fan,

Chen

et al. 2024

ACS Nano

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Solar-powered steam generation holds a strong sustainability in facing the global water crisis, while the production efficiency and antifouling performance remain challenges. Inspired by river moss, a multiscale biomimetic evaporator is designed, where the key photothermal conversion film composed of lamellar MoS 2 /graphene oxides (GO) can significantly enhance the evaporation efficiency and solve the problem of fouling. First-level leaf-like MoS 2 /GO nanosheets, obtained by a modified hydrothermal synthesis with an assisted magnetic-field rotation stirring, are self-assembled into a second-level nanoporous film, which achieves an evaporation rate (ER) of 1.69 kg m −2 h −1 under 1 sun illumination and an excellent self-cleaning ability. The tertiary-bionic evaporator with a macroscopic crownlike shape further enhances the ER to 3.20 kg m −2 h −1 , 189% above that of planar film, yielding 20.25 kg m 2 of freshwater from seawater during a daytime exposure of 6 h. The exceptional outcomes originate from the macroscopic biomimetic design and the microscopic integration of heterojunction interfaces between the MoS 2 and GO interlayers and the nanoporous surface. The biomimetic evaporator indicates a potential direction through surface/interface regulation of photothermal nanomaterials for water desalination.

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“…Solar-driven interfacial evaporation in wood and nanofibrillated cellulose is an example that mainly relies on the capillary effect to continuously supply water and reject brine for purification (Figure e). ,,− However, natural material-based solar steam generators inevitably suffer greatly from biofouling that deteriorates their performance in every aspect . For example, the resultant reduction of salt rejection leads to surface crystallization, increases solar reflection, and eventually limits vapor generation due to the reduced temperature of solar steam generators.…”

Section: Part 2: Water–energy Nexusmentioning

confidence: 99%

Redesigning Natural Materials for Energy, Water, Environment, and Devices

Liu,

Zhu,

Deng

et al. 2023

ACS Nano

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The United Nations Framework Convention on Climate Change (UNFCCC) acknowledges that global cooperation is paramount to mitigate climate change and further warming. The global community is committed to renewable energy and natural materials to tackle this challenge for all humankind. The widespread use of natural materials is embraced as one such action to reach net-zero carbon emissions. Given the hierarchical framework and earth abundance, cellulose-based materials extend their negative carbon benefits to our daily products and accelerate our pace toward carbon neutrality. Here, we present an overview of recent developments of cellulose-based materials in upsurging applications in radiative cooling, thermal insulation, nanofluidics, and wearable devices. We also highlight various modifications and functionalized processes that transform massive amounts of cellulose into green products. The prosperous development of functionalized cellulose materials aligns with a circular economy. Expedited interdisciplinary fundamental investigations are expected to make fibrillated cellulose penetrate more into carbon downdraw at speed and scale.

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Metal-free functionalized carbonized cotton for efficient solar steam generation and wastewater treatment

Abstract: Water desalination via solar steam generation is one of the most important technologies to address the increasingly pressing global water scarcity.

Cited by 17 publications

References 52 publications

Fe3O4/Diatomite-Decorated Cotton Evaporator for Continuous Solar Steam Generation and Water Treatment

Fe3O4/Diatomite-Decorated Cotton Evaporator for Continuous Solar Steam Generation and Water Treatment

Enhancing Solar-Driven Water Purification by Multiscale Biomimetic Evaporators Featuring Lamellar MoS₂/GO Heterojunctions

Redesigning Natural Materials for Energy, Water, Environment, and Devices

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Metal-free functionalized carbonized cotton for efficient solar steam generation and wastewater treatment

Abstract: Water desalination via solar steam generation is one of the most important technologies to address the increasingly pressing global water scarcity.

Cited by 17 publications

References 52 publications

Fe3O4/Diatomite-Decorated Cotton Evaporator for Continuous Solar Steam Generation and Water Treatment

Fe3O4/Diatomite-Decorated Cotton Evaporator for Continuous Solar Steam Generation and Water Treatment

Enhancing Solar-Driven Water Purification by Multiscale Biomimetic Evaporators Featuring Lamellar MoS2/GO Heterojunctions

Redesigning Natural Materials for Energy, Water, Environment, and Devices

Contact Info

Product

Resources

About

Enhancing Solar-Driven Water Purification by Multiscale Biomimetic Evaporators Featuring Lamellar MoS₂/GO Heterojunctions