Dual-crosslinked and dual-networked hydrogels with high mechanical properties for cost-effective solar water desalination and purification

Abstract

High solar evaporation efficiency combined with enhanced desalination and antifouling performance is key in the application of the solar-driven interfacial water evaporation (SIWE) technology. In this study, we have designed a dual-crosslinked and dual-networked hydrogel (CSH) for interfacial solar vapor generation (ISVG). Through adjusting the proportions of matrix components and balancing the degree of crosslinking between cellulose and epichlorohydrin, it is feasible to obtain the hybrid hydrogel with elastic behaviors. The resulted hydrogel has a porous structure enabling the transport of water molecules, while the doped component of iron-based metal–organic frameworks provides this hydrogel with strong light absorbance, achieving an evaporation rate of 2.52 kg·m⁻²·h⁻¹ under 1 kW·m⁻² solar irradiation and an evaporation efficiency of 89.32%. The porosity also creates salt resistance through capillary forces. Practical applications of such CSH hydrogels in the field of seawater desalination and wastewater purification are conducted under outdoor light conditions, and the concentrations of metal ions are revealed to be reduced by orders of magnitude below the WHO threshold ones, while pigments are found to be absent from the condensate contained in the treated wastewater.

Graphical abstract

Keywords

double crosslinking / hydrogel / solar-driven evaporation / desalination

References

[1] Chen C, Wang M, Chen X, . Recent progress in solar photothermal steam technology for water purification and energy utilization.Chemical Engineering Journal, 2022, 448: 137603

[2] Zhao F, Zhou X, Shi Y, . Highly efficient solar vapour generation via hierarchically nanostructured gels.Nature Nanotechnology, 2018, 13(6): 489–495

[3] Yu L S, Josey S A, Bingham F M, . Intensification of the global water cycle and evidence from ocean salinity: a synthesis review.Annals of the New York Academy of Sciences, 2020, 1472(1): 76–94

[4] Gan Z C, Zhao S, Zhang Z, . Hierarchically porous and high-strength carbon aerogel-based composite for solar-driven interfacial evaporation.Journal of Sol-Gel Science and Technology, 2023, 107(2): 388–400

[5] Wang R Z, Wang W X, Jensen M, . Polypyrrole-doped cellulose hydrogel evaporator for steam generation and wastewater cleaning.Journal of Sol-Gel Science and Technology, 2023, 107(2): 363–374

[6] Alosaimi F K, Tung T T, Dao V D, . Graphene-based multifunctional surface and structure gradients engineered by atmospheric plasma.Applied Materials Today, 2022, 27: 101486

[7] Hou X T, Sun H Y, Dong F Y, . 3D carbonized grooved straw with efficient evaporation and salt resistance for solar steam generation.Chemosphere, 2023, 315: 137732

[8] Ying L R, Huang Z, Dong Y X, . Hybrid nanoarchitectonics of carbon/titanium carbide integrated hydrogel/melamine foam for highly efficient solar steam and thermoelectric power generation.Desalination, 2023, 549: 116328

[9] Li L, Kang W, Zhao Y, . Preparation of flexible ultra-fine Al₂O₃ fiber mats via the solution blowing method.Ceramics International, 2015, 41(1): 409–415

[10] Zafar M S, Gatto F, Mancini G, . Biocomposite cryogels for photothermal decontamination of water.Langmuir, 2023, 39(22): 7793–7803

[11] Zhang Z Y, Liu H Y, Kong Z, . Mushroom-like graphene nanosheets/copper sulfide nanowires foam with Janus-type wettability for solar steam generation.ACS Applied Nano Materials, 2022, 5(4): 4931–4937

[12] Chen Y Q, Wang Y D, Xu J, . A 3D opened hollow photothermal evaporator for highly efficient solar steam generation.Solar RRL, 2022, 6(7): 2200202

[13] Han J J, Dong Z Y, Hao L, . Poly(ionic liquid)-crosslinked graphene oxide/carbon nanotube membranes as efficient solar steam generators.Green Energy & Environment, 2023, 8(1): 151–162

[14] Wu F, Qiang S Y, Zhu X D, . Fibrous MXene aerogels with tunable pore structures for high-efficiency desalination of contaminated seawater.Nano-Micro Letters, 2023, 15(1): 71

[15] Li X P, Li X F, Li H G, . Reshapable MXene/graphene oxide/polyaniline plastic hybrids with patternable surfaces for highly efficient solar-driven water purification.Advanced Functional Materials, 2022, 32(15): 2110636

[16] Xie Z J, Duo Y H, Lin Z T, . The rise of 2D photothermal materials beyond graphene for clean water production.Advanced Science, 2020, 7(5): 1902236

[17] Mu X T, Chen L H, Qu N N, . MXene/polypyrrole coated melamine-foam for efficient interfacial evaporation and photodegradation.Journal of Colloid and Interface Science, 2023, 636: 291–304

[18] Chen L H, Mu X T, Guo Y P, . MXene-doped kapok fiber aerogels with oleophobicity for efficient interfacial solar steam generation.Journal of Colloid and Interface Science, 2022, 626: 35–46

[19] Wu D X, Du C K, Huang C L . Combining carbonized sawdust beds with preheating water design for efficient solar steam generation.Applied Thermal Engineering, 2021, 195: 117238

[20] Ren H Y, Tang M, Guan B L, . Hierarchical graphene foam for efficient omnidirectional solar–thermal energy conversion.Advanced Materials, 2017, 29(38): 1702590

[21] You X L, Cao J L, Liu X W, . Synthesis of the poly(acrylic acid-acrylic sodium) bentonite composite and its adsorption of Cd(II).Asia-Pacific Journal of Chemical Engineering, 2017, 12(1): 65–74

[22] Song C Y, Zhang B Y, Hao L, . Converting poly(ethylene terephthalate) waste into N-doped porous carbon as CO₂ adsorbent and solar steam generator.Green Energy & Environment, 2022, 7(3): 411–422

[23] Wang W X, Chen Y, Wang N, . Multifunction ZnO/carbon hybrid nanofiber mats for organic dyes treatment via photocatalysis with enhanced solar-driven evaporation.Frontiers of Materials Science, 2022, 16(4): 220623

[24] Wang W X, Chen Y, Wang N, . Facile preparation of anatase coated nanofiber mats for multifaceted water treatment.Chemical Engineering Journal, 2024, 485: 149764

[25] Chu A Q, Yang M, Chen J L, . Biomass-enhanced Janus sponge-like hydrogel with salt resistance and high strength for efficient solar desalination.Green Energy & Environment, 2023, 214: 118373

[26] Guo Y H, Zhao F, Zhou X Y, . Tailoring nanoscale surface topography of hydrogel for efficient solar vapor generation.Nano Letters, 2019, 19(4): 2530–2536

[27] Liu C K, Peng Y, Zhao X Z . Flower-inspired bionic sodium alginate hydrogel evaporator enhancing solar desalination performance.Carbohydrate Polymers, 2021, 273: 118536

[28] Xu Y L, Lv B W, Yang Y, . Facile fabrication of low-cost starch-based biohydrogel evaporator for efficient solar steam generation.Desalination, 2021, 517: 115260

[29] Wang F Y, Zhao S J, Jiang Y, . Bacterial cellulose-based porous Janus aerogels for efficient interfacial solar steam generation.Desalination, 2024, 579: 117506

[30] Zhao F, Guo Y, Zhou X, . Materials for solar-powered water evaporation.Nature Reviews Materials, 2020, 5(5): 388–401

[31] Lu Y, Dai T Y, Fan D Q, . Turning trash into treasure: pencil waste-derived materials for solar-powered water evaporation.Energy Technology, 2020, 8(10): 2000567

[32] Lu Y, Fan D Q, Wang Y D, . Surface patterning of two-dimensional nanostructure-embedded photothermal hydrogels for high-yield solar steam generation.ACS Nano, 2021, 15(6): 10366–10376

[33] Irshad M S, Wang X B, Abbasi M S, . Semiconductive, flexible MnO₂ NWs/chitosan hydrogels for efficient solar steam generation.ACS Sustainable Chemistry & Engineering, 2021, 9(10): 3887–3900

[34] Ding J W, Ji D F, Yue Y Z, . Amorphous materials for lithium-ion and post-lithium-ion batteries.Small, 2024, 20(5): 2304270

[35] Qiu T, Liang Z, Guo W, . Metal-organic framework-based materials for energy conversion and storage.ACS Energy Letters, 2020, 5(2): 520–532

[36] Zhu R Y, Cai M R, Fu T T, . Fe-based metal organic frameworks (Fe-MOFs) for bio-related applications.Pharmaceutics, 2023, 15(6): 1599

[37] Cai J, Peng Y, Jiang Y X, . Application of Fe-MOFs in photodegradation and removal of air and water pollutants: a review.Molecules, 2023, 28(20): 7121

[38] Qin J X, Pei Y, Zheng Y, . Fe-MOF derivative photocatalyst with advanced oxygen reduction capacity for indoor pollutants removal.Applied Catalysis B: Environmental, 2023, 325: 122346

[39] Wang J, Wang W, Li J, . Universal strategy to prepare a flexible photothermal absorber based on hierarchical Fe-MOF-74 toward highly efficient solar interfacial seawater desalination.ACS Applied Materials & Interfaces, 2021, 13(38): 45944–45956

[40] Zhang B, Zhang L, Akiyama K, . Self-assembly of nanosheet-supported Fe-MOF heterocrystals as a reusable catalyst for boosting advanced oxidation performance via radical and nonradical pathways.ACS Applied Materials & Interfaces, 2021, 13(19): 22694–22707

[41] Zou Y, Wu X, Li H, . Metal-phenolic network coated cellulose foams for solar-driven clean water production.Carbohydrate Polymers, 2021, 254: 117404

[42] Shi C, Kang F, Zhu Y, . Photoreforming lignocellulosic biomass for hydrogen production: optimized design of photocatalyst and photocatalytic system.Chemical Engineering Journal, 2023, 452(1): 138980

[43] Yu J, Yang G G, Li Y, . Synthesis, characterization, and swelling behaviors of acrylic acid/carboxymethyl cellulose superabsorbent hydrogel by glow-discharge electrolysis plasma.Polymer Engineering and Science, 2014, 54(10): 2310–2320

[44] Wang L L, Zhang X S, Xia Y Z, . Cooking-inspired versatile design of an ultrastrong and tough polysaccharide hydrogel through programmed supramolecular interactions.Advanced Materials, 2019, 31(41): 1902381

[45] Qin X, Lu A, Zhang L . Gelation behavior of cellulose in NaOH/urea aqueous system via cross-linking.Cellulose, 2013, 20(4): 1669–1677

[46] Nguyen M N, Tran T T, Nguyen Q T, . Simple synthesis of cellulose hydrogels based on the direct dissolution of cellulose in tetrabutylphosphonium hydroxide followed by crosslinking.Polymers for Advanced Technologies, 2022, 33(10): 3376–3385

[47] Varamesh A, Abraham B D, Wang H, . Multifunctional fully biobased aerogels for water remediation: applications for dye and heavy metal adsorption and oil/water separation.Journal of Hazardous Materials, 2023, 457: 131824

[48] Qian L W, Yang M X, Zhang S F, . Preparation of a sustainable bioadsorbent by modifying filter paper with sodium alginate, with enhanced mechanical properties and good adsorption of methylene blue from wastewaters.Cellulose, 2018, 25(3): 2021–2036

[49] Chen Z, Pan Y, Cai P . Sugarcane cellulose-based composite hydrogel enhanced by g-C₃N₄ nanosheet for selective removal of organic dyes from water.International Journal of Biological Macromolecules, 2022, 205: 37–48

[50] Chen X, Chen C, Zhu J . Facile preparation of cellulose‒attapulgite nanocomposite hydrogel for dye adsorption.Iranian Polymer Journal, 2019, 28(4): 347–359

[51] Almeida A P C, Saraiva J N, Cavaco G, . Crosslinked bacterial cellulose hydrogels for biomedical applications.European Polymer Journal, 2022, 177: 111438

[52] Jensen M, Keding R, Höche T, . Biologically formed mesoporous amorphous silica.Journal of the American Chemical Society, 2009, 131(7): 2717–2721

[53] Hao L, Liu N, Bai H, . High-performance solar-driven interfacial evaporation through molecular design of antibacterial, biomass-derived hydrogels.Journal of Colloid and Interface Science, 2022, 608(1): 840–852

[54] Ge C, Xu D, Du H, . Recent advances in fibrous materials for interfacial solar steam generation.Advanced Fiber Materials, 2023, 5(3): 791–818

Declaration of competing interests

The authors declare no conflict of interests.

Online appendix

Electronic supplementary material (ESM) can be found in the online version at https://doi.org/10.1007/s11706-024-0701-0 and https://journal.hep.com.cn/foms/EN/10.1007/s11706-024-0701-0 that includes Table S1‒S4 and Figs. S1–S4.

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