Bifunctional <i>in situ</i> polymerized nanocomposites for convective solar desalination and enhanced photo-thermoelectric power generation

Shamim, Tariq; Wang, Xiaochang C.; Arshad, Naila; Javed, Muhammad Qasim; Guo, Zhenzhen; Li, Hong Rong; Mei, Tao

doi:10.1039/d1en01018b

Cited by 29 publications

(12 citation statements)

References 48 publications

(88 reference statements)

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“…The successful loading of MnO 2 resulted in the formation of Mn−O with excellent hydrophilic properties in C-CP/MnO 2 , so it exhibited superhydrophilic properties. 51 In addition, we also tested the change in the contact angle (Figure 2e), and the results were consistent with the experimental results. During the evaporation process, the material surface quickly generated a large amount of water vapor due to the high temperature, and the rapid overflow of water vapor is also the key to determine its evaporation rate.…”

Section: Resultssupporting

confidence: 85%

“…were exposed in C-CP, and the preferential decomposition of the linkages between the ribbon fibers resulted in the formation of more voids and pore structures in the vertical direction, which facilitated water transport. The successful loading of MnO 2 resulted in the formation of Mn–O with excellent hydrophilic properties in C-CP/MnO 2 , so it exhibited superhydrophilic properties . In addition, we also tested the change in the contact angle (Figure e), and the results were consistent with the experimental results.…”

Section: Resultssupporting

confidence: 81%

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Solar Interface Evaporation System Assisted by Mirror Reflection Heat Collection Based on Sunflower Chasing the Sun

Wang

Chang

et al. 2022

ACS Appl. Mater. Interfaces

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In this study, a photothermal material, C-CP/MnO2, was prepared by compounding corrugated paper (CP) and MnO2, with excellent photothermal conversion efficiency. The porous structure and the presence of oxygen-containing functional groups enabled the material to have a good water transport function and a fast vapor escape rate. The special semihollow structure also allowed C-CP/MnO2 to have better thermal management and an evaporation rate that could reach 2.563 kg m–2 h–1 with an efficiency of 98.82% under 1 sun. The continuous arch structure inside C-CP/MnO2 was able to induce the Marangoni effect to achieve continuous desalination of high-concentration brine. The mirror heat collector achieved efficient light capture on the material surface through multiple reflections of light. This could increase the amount of radiation on the material surface by nearly 80%, and the evaporation rate could reach 4.314 kg m–2 h–1 under 1 sun. Moreover, this study demonstrated the light propagation path by simulating the light using Zemax to verify the correctness of the experimental results. Inspired by the sunflower chasing the sun, we designed a chasing heat collection system powered by solar panels to achieve efficient evaporation outdoors. This provided new ideas for further development of solar interface evaporation and also provided guidance for other industrial applications.

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Section: Resultssupporting

confidence: 85%

Section: Resultssupporting

confidence: 81%

Solar Interface Evaporation System Assisted by Mirror Reflection Heat Collection Based on Sunflower Chasing the Sun

Wang

Chang

et al. 2022

ACS Appl. Mater. Interfaces

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“…Herein, a theoretically developed model coupled with experimented results can play a decisive role in better understanding of the salt rejection through convective wicks, for example, the simulated results of concentrated hot brine regulating from the top surface of the all-weather solar evaporator to underlying seawater via a salinity gradient potential. For this, the time-dependent computational fluid dynamics (CFD) simulation model [42,43] has been established, which successfully shows insights into the downward migration of hot brine flux from the top interfacial layer through the localized wicks under experimental conditions. The corresponding numerical solution using the continuity equation [42] is given in Note S4, Supporting Information, which resolves all the factors using momentum, energy, and salt flow assuming the chemical convection phenomena given in Equation ( 3) and (4) (Experimental Section).…”

Section: Resultsmentioning

confidence: 99%

Wormlike Perovskite Oxide Coupled with Phase‐Change Material for All‐Weather Solar Evaporation and Thermal Storage Applications

Irshad

Arshad

Zhang

et al. 2023

Adv Energy and Sustain Res

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Interfacial solar‐driven water evaporation has shown promising prospects in desalination technology. However, the lower photothermal conversion efficiency caused by the intermittent nature of sunlight and salt accumulation remains a significant challenge for continuous desalination. Herein, the hierarchical design of interfacial solar evaporation is reported, which realizes enhanced photothermal conversion, waste heat storage/release, and effective thermal management for continuous desalination. The solar evaporator is composed of worm‐like SrCoO3 perovskite oxide anchored on super hydrophilic polyurethane (PU) foam succeeded by in situ polymerization of conducting polypyrrole (SrCoO3@PPy). The energy storage system is introduced within polyurethane matrix by a paraffin block followed by a tongue‐and‐groove structure for convective water transportation, and a heat recovery unit largely reduces heat losses. The solar evaporator possesses excellent evaporation rates (2.13 kg m−2 h−1) along with 93% solar‐to‐vapor conversion efficiency under 1 kw m−2 solar irradiation owing to its minimum equivalent evaporation enthalpy and (0.85 kg m−2 h−1) under intermittent solar irradiation as compared to conventional solar evaporators. More importantly, state‐of‐the‐art experimental investigations validate waste heat recovery/release and the salt‐resistant capability of solar evaporators optimized by computational fluid dynamic simulation. This study breaks conventional solar interfacial evaporation's limitations and demonstrates stable desalination under intermittent sunlight.

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“…Freshwater scarcity remains a major global challenge, due to global population growth, industry development, and climate change. − Considering the abundant seawater and solar energy resources, solar-driven seawater desalination is one of the most effective approaches to boost freshwater supply. Compared with the traditional desalination technologies, solar steam generation (SSG) attracted much more attention owing to its eco-friendly nature, low cost, and high efficiency. − The ideal SSG system always possesses broadband light absorption, lower thermal conductivity, and timely water transportation. − The photothermal materials can locate the widely absorbed solar energy onto the upper surface and reduce energy loss to the surrounding environment, thus converting most of the absorbed energy into heat to generate steam. − Therefore, compared with previous reports, VOCs and thermal management are more and more concerned by researchers. − The development of low-cost and efficient SSG systems is still in great need for favorable economic and social benefits.…”

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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Bifunctional in situ polymerized nanocomposites for convective solar desalination and enhanced photo-thermoelectric power generation

Abstract: The risk of human loss in remote areas is caused by the inadequacies of water and energy which can be overcome via portable solar-driven evaporation setups. However, it is an...

Cited by 29 publications

References 48 publications

Solar Interface Evaporation System Assisted by Mirror Reflection Heat Collection Based on Sunflower Chasing the Sun

Solar Interface Evaporation System Assisted by Mirror Reflection Heat Collection Based on Sunflower Chasing the Sun

Wormlike Perovskite Oxide Coupled with Phase‐Change Material for All‐Weather Solar Evaporation and Thermal Storage Applications

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

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