Fibrous MXene Aerogels with Tunable Pore Structures for High-Efficiency Desalination of Contaminated Seawater

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: March 21, 2023

Abstract The seawater desalination based on solar-driven interfacial evaporation has emerged as a promising technique to alleviate the global crisis freshwater shortage. However, achieving high performance actual, oil-contaminated remains critical challenge, because transport channels and interfaces of current solar evaporators are easily blocked by oil slicks, resulting in undermined rate conversion efficiency. Herein, we propose facile strategy for fabricating modularized evaporator flexible MXene aerogels with arbitrarily tunable, highly ordered cellular/lamellar pore structures high-efficiency interception desalination. core design is creation 1D fibrous MXenes sufficiently large aspect ratios, whose superior flexibility plentiful link forms lay basis controllable 3D assembly into more complicated structures. cellular structure responsible effective contaminants rejection due multi-sieving effect achieved omnipresent, isotropic wall apertures together underwater superhydrophobicity, while lamellar favorable rapid presence continuous, large-area channels. delivers best (1.48 kg m −2 h −1 ) efficiency (92.08%) among all MXene-based materials seawater."Image missing"

Language: Английский

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Polylactic Acid (PLA) Melt-Blown Nonwovens with Superior Mechanical Properties

ACS Sustainable Chemistry & Engineering, Journal Year: 2023, Volume and Issue: 11(10), P. 4279 - 4288

Published: March 2, 2023

In contrast to the commonly used nondegradable melt-blown nonwovens, polylactic acid (PLA) nonwovens are renewable and biodegradable, making them very environmentally friendly at their end of life. However, strength toughness PLA generally insufficient for practical applications. Herein, we report a straightforward universal strategy fabricating with superior mechanical properties. this process, hierarchical controlling high-temperature high-speed airflow considerably increases polymeric chain orientation crystallization PLA. High-molecular-weight (Mw) chains can be entangled reduce negative effect excessive on elongation, resulting in gain same time. The exhibit enhanced (1.8 MPa, up by 157%), higher elongation (35.6%, 256%), excellent (0.59 MJ/m3, 788%). Additionally, plausible tensile failure mechanism is proposed based fracture process. Strikingly, high particulate matter (PM0.3), removal efficiency (92.6%), low pressure drop (12.3 Pa). successful preparation properties will satiate growing demand sustainability, personal protection, environmental protection.

Language: Английский

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Scalable Fabrication of Electrospun True-Nanoscale Fiber Membranes for Effective Selective Separation

Nano Letters, Journal Year: 2023, Volume and Issue: 23(3), P. 1044 - 1051

Published: Jan. 19, 2023

Electrospun fibers have received wide attention in various fields ranging from the environment and healthcare to energy. However, nearly all electrospun suffer a pseudonanoscale diameter, resulting fabricated membranes with large pore size limited separation performance. Herein, we report novel strategy based on manipulating equilibrium of stretch deformation phase jets develop true-nanoscale for effective selective separation. The obtained present diameters (∼67 nm), 1 order magnitude less than those common fibers, which endows resultant remarkable nanostructural characteristics performances areas protective textiles (waterproofness 113 kPa breathability 4.1 kg m-2 d-1), air filtration (efficiency 99.3% pressure drop 127.4 Pa), water purification (flux 81.5 h-1 salt rejection 99.94%). This work may shed light developing high-performance materials applications.

Language: Английский

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Plant Extract-Based Fabrication of Silver Nanoparticles and Their Effective Role in Antibacterial, Anticancer, and Water Treatment Applications

Plants, Journal Year: 2023, Volume and Issue: 12(12), P. 2337 - 2337

Published: June 15, 2023

Ammi visnaga is a biennial or annual herbaceous plant belonging to the family Apiaceae. For first time, silver nanoparticles were synthesized using an extract of this plant. Biofilms are rich source many pathogenic organisms and, thus, can be genesis various disease outbreaks. In addition, treatment cancer still critical drawback for mankind. The primary purpose research work was comparatively analyze antibiofilms against Staphylococcus aureus, photocatalytic activity Eosin Y, and in vitro anticancer HeLa cell line extract. systematic characterization carried out UV-Visible spectroscopy (UV-Vis), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), atomic force (AFM), dynamic light scattering (DLS), zeta potential, diffraction (XRD). initial performed with UV-Vis spectroscopy, where peak appeared at 435 nm, which indicated SPR band nanoparticles. AFM SEM determine morphology shape nanoparticles, while EDX confirmed presence Ag spectra. crystalline character concluded XRD. then subjected biological activities. antibacterial evaluated by determining inhibition biofilm formation aureus crystal violet assay. response AgNPs cellular growth found dose dependent. Green-synthesized showed 99% bacteria, excellent assay IC50 concentration 17.1 ± 0.6 µg/mL 100% inhibition, photodegradation toxic organic dye Y up 50%. Moreover, effect pH dosage photocatalyst also measured optimize reaction conditions maximum potential. Therefore, used wastewater contaminated dyes, biofilms, lines.

Language: Английский

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Air-Conditioned Masks Using Nanofibrous Networks for Daytime Radiative Cooling

Nano Letters, Journal Year: 2022, Volume and Issue: 22(23), P. 9485 - 9492

Published: Dec. 5, 2022

Face masks, as effective measures for passive air pollution control, are of fundamental importance, especially with the outbreak emerging infectious diseases. Most existing masks dense or thick, resulting in a lack thermal/humidity comfort level; despite being worn tightly, they show limited PM0.3/pathogen removal. Here, we use facile strategy to create air-conditioned using heterogeneous nanofibrous networks, based on an electrospinning/netting technique. Manipulation phase separation and self-assembly charged jet/droplets by control humidity-induced double diffusion Taylor cone instability allows generation consisting radiative cooling wrinkled nanofibers 2D nanostructured networks. Our desirable microenvironment high-efficiency PM0.3 removal (>99.988%), low resistance (0.07% atmospheric pressure), remarkable capacity (∼2.8 °C temperature ∼10% humidity drop), making high-performance filtration temperature/humidity management “always online”. This work should make possible development high-performance, energy-saving, scalable fiber textiles various applications.

Language: Английский

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Antibacterial biodegradable nanofibrous membranes by hybrid needleless electrospinning for high-efficiency particulate matter removal

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 461, P. 142137 - 142137

Published: Feb. 26, 2023

Language: Английский

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Electrospun nanofibers for medical face mask with protection capabilities against viruses: State of the art and perspective for industrial scale-up

Applied Materials Today, Journal Year: 2023, Volume and Issue: 32, P. 101833 - 101833

Published: May 2, 2023

Face masks have proven to be a useful protection from airborne viruses and bacteria, especially in the recent years pandemic outbreak when they effectively lowered risk of infection Coronavirus disease (COVID-19) or Omicron variants, being recognized as one main protective measures adopted by World Health Organization (WHO). The need for improving filtering efficiency performance prevent penetration fine particulate matter (PM), which can potential bacteria virus carriers, has led research into developing new methods techniques face mask fabrication. In this perspective, Electrospinning shown most efficient technique get either synthetic natural polymers-based fibers with size down nanoscale providing remarkable terms both particle filtration breathability. aim Review is give further insight implementation electrospun nanofibers realization next generation masks, functionalized membranes via addiction active material polymer solutions that optimal features about antibacterial, antiviral, self-sterilization, electrical energy storage capabilities. Furthermore, advances regarding use renewable materials green solvent strategies improve sustainability fabricate eco-friendly filters are here discussed, view large-scale nanofiber production where traditional membrane manufacturing may result high environmental health risk.

Language: Английский

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Engineering triple internal electric fields in Ag NWs@BaTiO3 composites for ultrasonic-visible-light driven antibacterial activity

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 463, P. 142310 - 142310

Published: March 9, 2023

Language: Английский

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Application of Inorganic Nanomaterials in Cultural Heritage Conservation, Risk of Toxicity, and Preventive Measures

Nanomaterials, Journal Year: 2023, Volume and Issue: 13(9), P. 1454 - 1454

Published: April 24, 2023

Nanotechnology has allowed for significant progress in architectural, artistic, archaeological, or museum heritage conservation repairing and preventing damages produced by deterioration agents (weathering, contaminants, biological actions). This review analyzes the current treatments using nanomaterials, including consolidants, biocides, hydrophobic protectives, mechanical resistance improvers, flame-retardants, multifunctional nanocomposites. Unfortunately, nanomaterials can affect human animal health, altering environment. Right now, it is a priority to stop analyze its advantages disadvantages. Therefore, aims are raise awareness about nanotoxicity risks during handling subsequent environmental exposure all those directly indirectly involved processes. It reports human-body interaction mechanisms provides guidelines controlling toxicity, mentioning toxicity research of main compounds emphasizing need provide more information morphological, structural, specific features that ultimately contribute understanding their toxicity. documents international organizations (European Commission, NIOSH, OECD, Countries Normative) worker protection, isolation, laboratory ventilation control, debris management. Furthermore, qualitative risk assessment methods, management strategies, dose focus/receptor relationship, besides latest trends masks gas emissions control devices, discussing

Language: Английский

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Constructing Hierarchical Polymer Nanocomposites with Strongly Enhanced Thermal Conductivity

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(36), P. 42900 - 42911

Published: Aug. 30, 2023

The rapid advancement of communication technology has substantially increased the demand for advanced electronic packaging materials with high thermal conductivity and outstanding electrical insulation properties. In this study, we design polyvinyl alcohol/polydopamine-modified boron nitride nanosheet (PVA/BNNS@PDA) nanocomposites hierarchical structures by combining electrospinning, vacuum filtration deposition, hot pressing. modified BNNS@PDA improves interaction between filler polymer matrix while reducing interfacial resistance, resulting in superior conductivity, excellent insulation, perfect flexibility. PVA/BNNS@PDA possess an ultrahigh in-plane 16.6 W/(m·K) at 35.54 wt % content. Even after 2000 folds, do not undergo any crack, showing their behavior. Furthermore, exhibit a volume resistivity above 1014 Ω·cm, which is well standard insulating materials. Based on these results, work provides novel method to produce offering new perspective management

Language: Английский

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