A self-floating, salt-resistant 3D Janus radish-based evaporator for highly efficient solar desalination

Lv, Bowen; Gao, Cong; Xu, Yujie; Fan, Xinfei; Xiao, Jun Jun; Liu, Yanming; Song, Chengwen

doi:10.1016/j.desal.2021.115093

Cited by 78 publications

(29 citation statements)

References 61 publications

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“…The sliced daikon is freeze dried and then carbonized for 2 h at 750 C in N 2 environment. [110] After being freeze dried, sliced radish is transformed to a 3D MPR (MWCNTs@PVDF-HFP/Radish) evaporator by dipping it into a solution (MWCNTs and polyvinylidene fluoride-cohexafluoropropylene) and baking it for 12 h at 50 C. [70] Fresh potatoes are used to form self-floating super hydrophilic porous carbon foam by a facile one-step calcination process. [146] The uniform thickness (from 2 mm to 1 cm) and diameter (3-6 cm) slices are free dried for 24 h followed by carbonization at 400, 500, 600, and 700 C for 160 min, respectively.…”

Section: Carbonized and Carbon-coated Natural Porous Materialsmentioning

confidence: 99%

“…Many researchers used a thermally insulating layer of silica aerogel surrounding the beaker. [70,110] Carbonized wood or woodderived aerogel-made photothermal material can also be placed on bulk water for interfacial steam generation. Chao et al demonstrated reduced graphene-coated wood-derived aerogel (rGO-WA)-based photothermal material to transport seawater to the upper surface by the capillary force from rGO-WA.…”

Section: Contact Mode and Water Transportationmentioning

confidence: 99%

“…[50][51][52][53] However, at the same time, the naturally found porous materials often provide relatively lower solar absorbance, which has been addressed by providing an extra layer of coating using nanomaterials [54][55][56] or chemical treatment [49,57,58] and carbonization of the materials. [36,55,[59][60][61] Among many natural porous materials, wood, [62][63][64][65][66][67][68] mushroom, [60,69] straw, [55] radish, [70,71] corncob, [72,73] bamboo, [47,51,74,75] lotus seedpods and leaf, [59,76] carrot, [77,78] sunflower head, [79,80] luffa sponge, [49,81,82] coconut husk, [83] rice husk, [84,85] etc. are the most commonly investigated natural porous materials for the ISSG-based system.…”

mentioning

confidence: 99%

“…Optical performance of various natural solar evaporation a) UVÀvisÀNIR spectrum of freeze-dried radish and Janus MWCNTs@ poly(vinylidene fluoride-co-hexafluoropropylene)/Radish (MPR). Reproduced with permission [70]. Copyright 2021, Elsevier.…”

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Natural Porous Materials for Interfacial Solar Steam Generation toward Clean Water Production

et al. 2022

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Food along with water, clothes, and shelter has long been considered as basic necessities for human life. [1] However, the reality is that people all around the globe continue to have difficulties in fulfilling their fundamental survival requirements. Rising population, unplanned urbanization, climate change, global energy, and natural resource crises are exacerbating these issues. Despite the fact that water covers more than three-quarters of the Earth's surface, providing fresh water as a fundamental requirement in certain drought-prone areas remains a problem. [2,3] Reducing the conflict between demand and availability for fresh water has become a significant problem in recent decades. According to World Health Organization (WHO), a shortage of freshwater resources may impact half of the world's population in the near future. [4,5] As a result, reliance on nontraditional sources, that is, purification of saltwater, sewage, and industrial effluents, must be increased to ease pressure on conventional water sources. [6][7][8] However, excessive levels of germs and hard particles in water from nontraditional sources may induce illnesses such as typhoid, jaundice, cholera, dysentery, and others. [9] Nevertheless, identifying alternative freshwater sources and implementing sustainable techniques for reusing and recycling water from unconventional sources may be a viable way to address the worldwide problem of freshwater shortage.Recent research on the generation of freshwater has revealed that methods such as reverse osmosis, electrodialysis, thermal desalination, and multiple-effect distillation need a high consumption of fossil fuels, a substantial initial investment, and the emission of polluting gas. [10][11][12] Thus, an interfacial solar-driven steam generation (ISSG)-based system is always recommended as a good candidate for seawater desalination, sterilizing, and wastewater treatment owing to its sustainability, cost-effectiveness, environmental friendliness, as well as ease of operation. In contrast to the natural water evaporation system, the ISSG-based system uses the heat localization method to heat only the portion of water which is associated with the airÀwater interface rather than the bulk water, substantially increasing the water evaporation rate. This technique utilizes the radiant heat from the sun with the assistance of photothermal energy conversion material, making it a promising sustainable solution to the water crisis. Furthermore, with proper design, heat loss can be minimized, allowing this technique to generate enough steam for water desalination, purification, and many other applications. [13][14][15][16][17][18][19] The selection of photothermal energy conversion materials for the ISSG mainly depends on the material's optical absorption spectra, photothermal conversion efficiency, sustainability, and duration of transmitting water to the heating surface (Figure 1). Researchers have investigated many naturally processed materials and nanoparticles (NPs) to design an efficient

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Section: Carbonized and Carbon-coated Natural Porous Materialsmentioning

confidence: 99%

Section: Contact Mode and Water Transportationmentioning

confidence: 99%

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confidence: 99%

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Natural Porous Materials for Interfacial Solar Steam Generation toward Clean Water Production

et al. 2022

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“…Thus, it is the right time to develop an advanced, eco-friendly, 100% carbon neutral, harmless, and low-cost desalination technique. In such a way, the solar desalination process raised its importance through the harvesting of the abundantly available solar energy into steam (freshwater) under the strategic conversion of light into heat [9]. For example, solar desalination is a process for obtaining pure water from abundantly available seawater through the pressure-free water purification process.…”

Section: Introductionmentioning

confidence: 99%

Advancements in Solar Desalination of Seawater by Various Ti3C2 MXene Based Morphologies for Freshwater Generation: A Review

Sreedhar

Noh

2021

Catalysts

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For a few years, we have been witnessing ubiquitous fresh and drinking water scarcity in various countries. To mitigate these problematic situations, many countries relied on non-conventional freshwater generation technologies through solar desalination of seawater. In this manner, we excel the ability of new class 2D Ti3C2 MXenes as a photothermal material (solar absorber) for freshwater generation via the solar desalination technique. In this review, the air–water interfacial interaction is highlighted for improving the evaporation efficiency. To provide the dependence of the desalination efficiency on the microstructure of the solar absorbers, we summarized various forms of 2D Ti3C2 MXenes (aerosol, films, foam, hydrogel, membrane, monolith and porous structure) and their characteristics. These microstructures prevailed ultrahigh photoconversion efficiency. In this aspect, we further explained key features such as light absorption, reflection, multiple internal reflection, hydrophilicity, lower thermal conduction, light-to-heat generation, and salt rejection for achieving efficient desalination output throughout the visible and broadband region. Specifically, we targeted to explore the self-floating and salt rejection nature of various state-of-the-art 2D Ti3C2 MXene structures. Further, we highlighted the long-term stability. Among the above morphologies, Ti3C2 MXene in the form of a membrane is believed to be a promising morphology which effectively desalinates seawater into freshwater. Finally, we highlighted the challenges and future perspectives, which can pave a potential path for advancing the sustainable solar desalination of seawater into freshwater.

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Bioinspired, Sustainable, High‐Efficiency Solar Evaporators for Sewage Purification

Wang,

Jin,

Zhang

et al. 2023

Adv Funct Materials

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To alleviate the severe water crisis, an interfacial solar evaporator provides a promising method to produce freshwater. Although many superior solar evaporators present high evaporation rates by reducing the water evaporation enthalpy, adapting sustainable materials to construct high‐efficiency solar evaporators remains challenging. Herein, inspired by the corncob pith's structure and functional groups, interconnected porous cellulose hydrogel is proposed by crosslinking sustainable hydroxypropyl cellulose. Benefiting from the porous structure and abundant hydroxy group, the corncob pith/carbon nanotubes (CNTs) and cellulose hydrogel/CNTs evaporators show a low evaporation enthalpy of 880.5 ± 42.1 and 1280.7 ± 57.8 J g−1 due to the reduced hydrogen bond numbers between water molecules and enable evaporation rates of 3.06 and 2.56 kg m−2 h−1, respectively. Moreover, the evaporators present superior purification performance for seawater and sewage, and show excellent anti‐biological fouling properties under light irradiation. It is anticipated that the bionic strategy would provide an in‐depth understanding of designing next‐generation sustainable solar evaporators in the framework of the dual‐carbon concept.

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A self-floating, salt-resistant 3D Janus radish-based evaporator for highly efficient solar desalination

Cited by 78 publications

References 61 publications

Natural Porous Materials for Interfacial Solar Steam Generation toward Clean Water Production

Natural Porous Materials for Interfacial Solar Steam Generation toward Clean Water Production

Advancements in Solar Desalination of Seawater by Various Ti3C2 MXene Based Morphologies for Freshwater Generation: A Review

Bioinspired, Sustainable, High‐Efficiency Solar Evaporators for Sewage Purification

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