Bamboo shoot-based evaporator with self-cleaning and mildew-resistant for efficient solar steam generation

Chen, Yan; Fang, Jiangyu; Tian, Li; Xia, Mengsheng; Xu, Pengtao; Cao, Yan; Wei, Dongze; Gao, Junkai

doi:10.1016/j.desal.2022.116003

Cited by 41 publications

(27 citation statements)

References 48 publications

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“…The main reasons for the good photothermal conversion rate of Fe-Mo-1 are as follows: (1) Both MoS 2 and Fe 3 O 4 have a strong photothermal conversion performance themselves, although the smooth MoS 2 surface reflects a large amount of sunlight and reduces its photothermal conversion performance; Fe 3 O 4 nanospheres attached to the MoS 2 nanosheets increase the specific surface area of the composite sample greatly, also reducing the reflection of sunlight and reducing heat conduction and thermal radiation loss, increasing the photothermal conversion efficiency [ 36 ]. (2) The sample was evenly spread on cotton, which has strong water absorption and can transmit enough seawater to the sample in real time to complete evaporation [ 37 ].…”

Section: Resultsmentioning

confidence: 99%

MoS2 Nanosheets Decorated with Fe3O4 Nanoparticles for Highly Efficient Solar Steam Generation and Water Treatment

Bai

Xu²,

et al. 2023

Molecules

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The shortage of water resources has always been one of the most difficult problems that perplexes humanity. Solar steam generation (SSG) has been a new non-polluting and low-cost water purification method in recent years. However, the high cost of traditional photothermal conversion materials and the low efficiency of photothermal conversion has restricted the large-scale application of SSG technology. In this work, composite materials with Fe3O4 nanospheres attached to MoS2 nanosheets were synthesized, which increased the absorbance and specific surface area of the composite materials, reduced the sunlight reflection, and increased the photothermal conversion efficiency. During the experiment, the composite material was evenly coated on cotton. The strong water absorption of cotton ensured that the water could be transported sufficiently to the surface for evaporation. Under one sun irradiation intensity, the evaporation rate of the sample synthesized in this work reached 1.42 kg m−2 h−1; the evaporation efficiency is 89.18%. In addition, the surface temperature of the sample can reach 41.6 °C, which has far exceeded most photothermal conversion materials. Furthermore, the use of this composite material as an SSG device for seawater desalination and sewage purification can remove more than 98% of salt ions in seawater, and the removal rate of heavy metal ions in sewage is close to 100%, with a good seawater desalination capacity and sewage purification capacity. This work provides a new idea for the application of composite materials in the field of seawater desalination and sewage purification.

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Section: Resultsmentioning

confidence: 99%

MoS2 Nanosheets Decorated with Fe3O4 Nanoparticles for Highly Efficient Solar Steam Generation and Water Treatment

Bai

Xu²,

et al. 2023

Molecules

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“…The evaporation efficiency ( η ) was calculated using the following formula 27 : where is the net evaporation rate (kg m −2 h −1 ), is the specific heat volume of water (4.2 J g −1 K −1 ), is the elevated temperature during evaporation (°C), is the latent heat of water evaporation (2256.0 kJ kg −1 ), is the power density of solar illumination (1 kW m −2 ).…”

Section: Methodsmentioning

confidence: 99%

Environmental-friendly regenerated lignocellulose functionalized cotton fabric to prepare multi-functional degradable membrane for efficient oil–water separation and solar seawater desalination

Gao

Fang

et al. 2023

Sci Rep

Self Cite

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Freshwater pollution and shortage have become an imminent problem. Therefore, it is necessary to develop a multi-functional membrane for the production of fresh water. In this work, the regenerated lignocellulose modified cotton fabric was developed as a novel, multi-functional and degradable membrane (LCPT@CF) for efficient oil–water separation and solar steam generation for the first time. The fabrication method has the merits of simple, environmentally friendly and cost effective. The regenerated lignocellulose was adhered on the surface of cotton fabric by tannic acid and polyvinyl alcohol complexes tightly, and the multilayered structures of the LCPT@CF can be formed, which endowed the membranes with underwater superoleophobic property and durability. The underwater superoleophobic property enabled LCPT@CF to purify various kinds of oil-in-water emulsions with a separation efficiency of more than 99.90%. Moreover, benefiting from the excellent photothermal conversion capacity of regenerated lignocellulose, the LCPT@CF achieved high evaporation rate of 1.39 kg m−2 h−1 and favorable evaporation efficiency of 84% under 1 sun illumination, and the LCPT@CF also presented excellent salt-resistance for evaporating seawater for 20 cycles, without salt accumulation. More importantly, the LCPT@CF could be naturally degradable by microorganisms in the natural condition within 3 months, which had outstanding environmental friendliness. These above results demonstrated that the green and efficient LCPT@CF could play great potential in oil–water separation and sewage purification.

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“…Currently, various photothermal materials have been applied to SSG systems, such as carbon-based materials, − polymers, − semiconductor materials, − porous aerogels, − biomass-based materials, and so forth. − From a sustainable and practical development perspective, biomass and biomass waste-based materials have a particularly potential application value, owing to their eco-friendly nature, abundance, low cost, and high efficiency. − For example, Liu et al fabricated a sustainable biomass-based evaporator by using cuttlefish ink absorbent materials and chitosan hydrogels as skeletons. Also, the SSG evaporator can achieve an evaporation efficiency of 72.94% under 1 sun irradiation.…”

Section: Introductionmentioning

confidence: 99%

Integrated Solar Evaporator with Salt Resistance and Lipophobicity Derived from Waste Newspapers for Efficient Desalination

Wang

Xiao

et al. 2023

ACS Sustainable Chem. Eng.

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Solar steam generation (SSG) is an effective way to mitigate the freshwater crisis. However, challenges still remain in scalable preparation, cost-effectiveness, and expanding the scope of practical applications for photothermal materials. Herein, a biomass-based solar steam generator (named OR-INP) with salt-resistant, oil-repellent, and anti-fouling performances is fabricated by grafting poly(ionic liquid)s onto celluloses from waste newspapers and then conducting oil-repellent modification. Benefiting from the broad solar absorption in the wet state (ca. 92%), low thermal conductivity (0.1108 W m–1 K–1), and strong hydrophilic and oleophobic properties, the solar evaporation efficiency is as high as 93.25% for pure water, 84.96% for 20 wt % NaCl, and 78.46% for 5 wt % oily wastewater, under 1 sun irradiation. Moreover, the aerogel still has excellent purification effects on solutions which contain organic dyes, heavy metal ions, or bacteria. Therefore, combining the merits of salt resistance, oil repellency, and wastewater treatment, this work develops the prospect of employing waste biomass resource-based photothermal materials and expands the practical application range of biomass-based evaporators.

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Bamboo shoot-based evaporator with self-cleaning and mildew-resistant for efficient solar steam generation

Cited by 41 publications

References 48 publications

MoS2 Nanosheets Decorated with Fe3O4 Nanoparticles for Highly Efficient Solar Steam Generation and Water Treatment

MoS2 Nanosheets Decorated with Fe3O4 Nanoparticles for Highly Efficient Solar Steam Generation and Water Treatment

Environmental-friendly regenerated lignocellulose functionalized cotton fabric to prepare multi-functional degradable membrane for efficient oil–water separation and solar seawater desalination

Integrated Solar Evaporator with Salt Resistance and Lipophobicity Derived from Waste Newspapers for Efficient Desalination

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