Fully Lignocellulosic Biomass‐Based Double‐Layered Porous Hydrogel for Efficient Solar Steam Generation

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(51)

Published: Oct. 31, 2022

Abstract Solar‐driven interfacial evaporation is an important approach for solving the issue of freshwater scarcity. However, practical application solar steam generation hindered by high fabrication cost and environmental concerns regarding petroleum‐based materials. Herein, lignocellulose (cellulose‐lignin composite) hydrogel (LCG) lignin‐derived carbon (LC) are used as substrate photothermal material, respectively, to construct a fully lignocellulose‐based double‐layered (LC@LCG) evaporator. Results indicate that LC has ultrahigh specific surface area full‐spectrum absorption 98%. The presence lignin can improve hydrophilicity maintain capillary channels hydrogel, which tunes water into intermediate state reduces vaporization enthalpy water. Moreover, it ensures transport rate in hydrogel. Based on these advantages, conversion efficiency evaporator reach 1.84 kg m −2 h −1 under one sun 86.5%, respectively. lignocellulosic could remove >99.95% primary metal ions from seawater generate fresh water, shows outstanding salt resistance, durability, long‐term stability desalination. This study demonstrates eco‐friendly economic solution continuous production using biomass‐based

Language: Английский

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Integrated Water and Thermal Managements in Bioinspired Hierarchical MXene Aerogels for Highly Efficient Solar‐Powered Water Evaporation

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(19)

Published: Feb. 5, 2022

Abstract Solar‐powered water evaporation is a straightforward, practical approach to use solar energy for desalination. Solar absorbers made from photothermal materials capable of effectively confining heat and pumping the surface are essential high efficiency. However, separate designs transport routes thermal insulating layers required simultaneously achieve desired managements. This work reports an integrated design efficient multifunctional capabilities through rational assembly spectrally modified Ti 3 C 2 T x (SM‐Ti ) nanosheets polyvinyl alcohol (PVA) into multiscale 3D aerogel with feather‐like microstructure. The contains longitudinal struts transversely parallel ligaments developed at angle ≈ 60 ° struts, resembling microstructure down feathers in penguins thus leading excellent insulation. hydrophilic porous serve as upward channels, while it within avoid oversaturation. These functional features endow composite efficiency 88.52% rate 0.92 kg m −2 h −1 weak irradiance 0.5‐sun, indicating its great potential solar‐powered desalination under natural sunlight.

Language: Английский

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Bio‐Inspired Sandwich‐Structured All‐Day‐Round Solar Evaporator for Synergistic Clean Water and Electricity Generation

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(45)

Published: Oct. 16, 2023

Abstract The integration of solar‐driven interfacial evaporation and electricity co‐generation is considered a promising approach to simultaneously alleviate freshwater scarcity the energy crisis. However, affected by intermittent solar irradiation/uncontrollable weather, overall performance in real world greatly reduced. Herein, inspired antifreeze proteins beetles that survive extreme climates, all‐weather evaporators with sandwich structure are designed. top bottom layers composed MnO 2 ‐modified cotton cloth used for photothermal conversion water transport, meanwhile, middle layer made phase change microcapsule/hydrogel composite serves heat storage release. Under 1 kW m −2 irradiation, evaporator exhibits high rate 2.67 kg h −1 an efficiency 89.5%. In dark, released from supports 0.43 , 3.6 times pure water. Additionally, assembled thermoelectric module, hybrid device achieves stable output power 0.42 W under 1‐sun illumination prolonged 30 min dark. This work provides novel full‐time solar‐powered steam‐electricity proof concept biomimetic steam generation/heat management integration.

Language: Английский

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Hofmeister Effect‐Enhanced Hydration Chemistry of Hydrogel for High‐Efficiency Solar‐Driven Interfacial Desalination

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(5)

Published: Nov. 11, 2022

Solar-driven water evaporation technology holds great potential for mitigating the global scarcity due to its high energy conversion efficiency. Lowering vaporization enthalpy of is key boost performance solar-driven desalination. Herein, a highly hydratable hydrogel (PMH) network, consisting modified needle coke as photothermal material and polyvinyl alcohol (PVA) matrix, crafted via simple physical cross-linking method. When capitalizing on PMH evaporator 3.5 wt% NaCl solution, rate 3.18 kg m-2 h-1 under one sun illumination deliver ed, unexpectedly outperforming that in pure (2.53 ). More importantly, shows robust desalination durability, thus enabling self-cleaning system. Further investigations reveal outstanding brine roots hydrability tuned by chaotropic Cl- , wherein can mediate hydration chemistry PVA suppress related crystallinity, contributing increased content intermediate lowered brine. This work first scrutinizes Hofmeister effect behavior provides insights high-efficiency interfacial

Language: Английский

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Water Activation in Solar‐Powered Vapor Generation

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(47)

Published: July 3, 2023

Abstract Solar‐powered vapor evaporation (SVG), based on the liquid‐gas phase conversion concept using solar energy, has been given close attention as a promising technology to address global water shortage. At molecular level, molecules escaping from liquid should overcome attraction of surface layer evaporate. For this reason, it is better reduce energy required for by breaking smaller number hydrogen bonds or forming weak ensure efficient and convenient production. Many novel evaporator materials effective activation strategies have proposed stimulate rapid steam production surpass theoretical thermal limit. However, an in‐depth understanding phase/enthalpy change process unclear. In review, summary analyses vaporization enthalpy, general calculations, characterization methods provided. Various mechanisms are also outlined enthalpy in evaporators. Moreover, unsolved issues associated with critically discussed provide direction future research. Meanwhile, significant pioneering developments made SVG highlighted, hoping relatively entire chain more scholars who just stepping into field.

Language: Английский

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High-performance solar-driven interfacial evaporation through molecular design of antibacterial, biomass-derived hydrogels

Journal of Colloid and Interface Science, Journal Year: 2021, Volume and Issue: 608, P. 840 - 852

Published: Oct. 13, 2021

Language: Английский

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Reshapable MXene/Graphene Oxide/Polyaniline Plastic Hybrids with Patternable Surfaces for Highly Efficient Solar‐Driven Water Purification

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 32(15)

Published: Dec. 22, 2021

Abstract Although many solar‐driven water evaporators are developed for solar steam generation, most solarthermal energy conversion materials cannot be used repeatedly constructing with variable shapes and patternable surfaces. Herein, reshapable Ti 3 C 2 T x MXene/graphene oxide (GO)/polyaniline (PANI) (MGP) hybrids surfaces fabricated by PANI‐assisted assembly of GO MXene efficient purifications both seawater wastewater. The shapes, surfaces, reusability the plastic MGP attributed to strong interactions PANI MXene. Benefiting from excellent hydrophilic MXene, MGP, reduced vaporization enthalpy, flat concave pyramid exhibit average evaporation rates as high 2.89 3.30 kg m −2 h −1 under 1‐sun irradiation, respectively. When is molded a flower‐shaped evaporator, an outstanding rate ≈3.94 exceptional efficiency ≈135.6% achieved irradiation. reusable highly in generating clean wastewater satisfactory ion rejection nearly 100%.

Language: Английский

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Janus biocomposite aerogels constituted of cellulose nanofibrils and MXenes for application as single-module solar-driven interfacial evaporators

Journal of Materials Chemistry A, Journal Year: 2021, Volume and Issue: 9(34), P. 18614 - 18622

Published: Jan. 1, 2021

Single-module solar-driven interfacial evaporators based on Janus cellulose nanofibril/MXene composite aerogels were developed, achieving evaporation rates as high 2.287 kg m −2 h −1 under 1 sun.

Language: Английский

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One‐Step Synthesis of Multifunctional Chitosan Hydrogel for Full‐Thickness Wound Closure and Healing

Advanced Healthcare Materials, Journal Year: 2021, Volume and Issue: 11(4)

Published: Nov. 17, 2021

Multifunctional hydrogel as a sealant or wound dressing with high adhesiveness and excellent antibacterial activity is highly desirable in clinical applications. In this contribution, one-step synthetic based on quaternized chitosan (QCS), tannic acid (TA), ferric iron (Fe(III)) developed for skin incision closure Staphylococcus aureus (S. aureus)-infected healing. system, the ionic bonds hydrogen between QCS TA form main backbone of hydrogel, metal coordination Fe(III) (catechol-Fe) endow (near-infrared light) NIR-responsive photothermal property, these multiple dynamic physical crosslinks enable QCS/TA/Fe flexible self-healing ability injectability. Moreover, possesses superior antioxidant, anti-inflammatory, hemostasis, biocompatibility. Also, it safe vital organs. The data from mouse model infected full-thickness presented effectiveness acceleration healing process by multifunctional highlighting its great potential management.

Language: Английский

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A bioinspired 3D solar evaporator with balanced water supply and evaporation for highly efficient photothermal steam generation

Journal of Materials Chemistry A, Journal Year: 2021, Volume and Issue: 10(6), P. 2856 - 2866

Published: Dec. 13, 2021

Inspired by a lotus leaf, 3D carbon fibre-cotton-based conical water evaporator with tuneable supply is designed. By changing the number of branch paths, balance between flux and evaporation rate achieved.

Language: Английский

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