Incorporation of P5+ and P3− from phosphate precursor in TiO2:P coatings produced by PEO: XPS and DFT study

Torres-Cerón, Darwin Augusto; Amaya-Roncancio, S.; Riva, Julieta Soledad; Vargas-Eudor, Aldemir; Escobar-Rincón, Daniel

doi:10.1016/j.surfcoat.2021.127437

Cited by 31 publications

(19 citation statements)

References 48 publications

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“…In Figure e,f, the high-resolution XPS C 1s spectra of DOPA, PU-E, PDA-PU, and MXene@PDA-PU show three peaks, which locate around ∼284, ∼286, and ∼288 eV, assigned to C–C/C–H, C–O, and CO . Due to the spin–orbital coupling of electrons, the energy level of Ti 2p in the MXene@PDA-PU fibrous membrane is decomposed into Ti 2p 1/2 and Ti 2p 3/2 , with the corresponding electron binding energies of 460.41 eV and 454.90 eV . Moreover, the Ti 2p 3/2 peak also included Ti–C with 452.88 eV binding energy .…”

Section: Resultsmentioning

confidence: 99%

Janus Membrane Decorated by MXene Multilayered Nanoflakes for Wet–Thermal Management

Tian

et al. 2022

ACS Appl. Nano Mater.

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Personal wet–thermal management, which focuses on adjusting the moisture and temperature in a “human skin–wearable fabric–external environment” microclimate system, is the basis for ensuring the comfort of human beings and has recently attracted tremendous attention owing to its substantial significant role not only in ameliorating the health conditions but also in smart textiles for personal protection, electronic wearable devices, health monitoring, and so on. However, wearable fabrics focusing on personal comfort, especially wet–thermal dual-mode management, viz., including both efficient sweat removal and heat retention performances that provide protection for outdoor sports or work in a cold environment, still present huge challenges in their design, fabrication, and practical application. A Janus membrane with asymmetric wettability (superhydrophobic/hydrophobic–superhydrophilic/hydrophilic) along the thickness direction shows a unique directional water transport capacity, acts as a “water transport diode”, and is expected to be helpful to expel sweat/moisture efficiently from the human body to the external environment. Herein, we fabricated a hydrophobic/hydrophilic Janus membrane decorated by MXene (Ti3C2T x ) multilayered nanoflakes with outstanding photothermal conversion capacity via facile electrospinning combined with in situ polymerization. By virtue of asymmetric wettability and directional wicking, water and moisture can be driven from the hydrophobic layer to the hydrophilic layer, providing the Janus membrane with excellent directional water and moisture transport capacity. Furthermore, the successful decoration of MXene multilayered nanoflakes imparts electrical-power-independent heat retention capacity to the Janus membrane, resulting from the excellent photothermal conversion capacity of MXene. This work provides an insight into the facile design of Janus membranes for wet–thermal management and establishes a promising strategy not only to maintain personal comfort to ameliorate the health conditions as well as to improve the work efficiency of outdoor laborers in a cold environment but also to guarantee the special functions of smart wearable and multifunctional fabrics.

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Section: Resultsmentioning

confidence: 99%

Janus Membrane Decorated by MXene Multilayered Nanoflakes for Wet–Thermal Management

Tian

et al. 2022

ACS Appl. Nano Mater.

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“…530 eV, oxygen related to vacancies (O V ) at ca. 531 eV, and oxygen related to P x O y species (O P ) at above 532 eV. , After hydrothermal treatment, the peak of O P is the only one that illustrates a red shift in addition to its reduced intensity (red arrow in Figure B). Concurrently, the other two oxygen peaks manifest blue shifts, implying that the removal of P x O y facilitates the interaction between TiO 2 and elemental RP.…”

Section: Resultsmentioning

confidence: 99%

“…We hence conducted a molecular simulation for verification. Simulations regarding the P doping of TiO 2 has been extensively discussed . It is believed that Ti–O–P or Ti–P bonds are inclined to form when the phosphorus atom bears a positive (e.g., P 5+ , PO 4 3– ) or negative valence (e.g., P 3– ), repsectively. , However, few computational studies have considered the zerovalent elemental P. One obstacle of such work is the unknown structure of amorphous RP, prohibiting appropriate modeling.…”

Section: Resultsmentioning

confidence: 99%

Green and Facile Fabrication of Metal Oxide/Red Phosphorus Composite Catalysts for CO₂Photoreduction

Batur

Bian

et al. 2022

ACS Sustainable Chem. Eng.

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Photocatalyzed CO 2 reduction (CO 2 RR) transfers CO 2 into valuable products using renewable energy, attracting widespread attention. Composite catalysts fabricated with TiO 2 and red phosphorus (RP) might exhibit competitive advantages, but effective interphase binding is difficult to forge. The composites therefore require complex and energy-consuming syntheses, severely hindering their application in CO 2 RR. In this work, TiO 2 /RP composites with hyperefficient interphase contact, which outperform various elaborately designed catalysts, are directly prepared from commercially available materials via a green and facile hydrothermal approach. The low heating temperature and sole solvent of water diminish the energy input for synthesis and imply a potential opportunity to propel CO 2 RR with industrial waste heat and cooling water. Experimental and computational analyses reveal that hydrothermal synthesis reduces the interfering oxidized species on the exterior surface of RP, facilitating the relatively less favored interphase contact between TiO 2 and nonoxidized RP. Photoelectron transfer and catalytic performance of the composites are hence drastically enhanced. Further improvement of activity is feasible by slightly elevating the heating temperature, time, or solution acidity. Attributing to the universal applicability of this green approach, different metal oxide/RP composites (e.g., WO 3 /RP) are similarly prepared, consistently boosting the reaction rate multiple times.

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“… 32 For the PLA-E fibrous membrane, due to the spin-orbital coupling of electrons, the Ti 2p energy levels were decomposed into Ti 2p 1/2 and Ti 2p 3/2 , with corresponding binding energies of 461.34 eV and 455.29 eV, indicating that TiO 2 was successfully anchored on the material. 33 …”

Section: Resultsmentioning

confidence: 99%

Polylactic acid based Janus membranes with asymmetric wettability for directional moisture transport with enhanced UV protective capabilities

et al. 2022

RSC Adv.

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Incorporation of P5+ and P3− from phosphate precursor in TiO2:P coatings produced by PEO: XPS and DFT study

Cited by 31 publications

References 48 publications

Janus Membrane Decorated by MXene Multilayered Nanoflakes for Wet–Thermal Management

Janus Membrane Decorated by MXene Multilayered Nanoflakes for Wet–Thermal Management

Green and Facile Fabrication of Metal Oxide/Red Phosphorus Composite Catalysts for CO₂Photoreduction

Polylactic acid based Janus membranes with asymmetric wettability for directional moisture transport with enhanced UV protective capabilities

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Incorporation of P5+ and P3− from phosphate precursor in TiO2:P coatings produced by PEO: XPS and DFT study

Cited by 31 publications

References 48 publications

Janus Membrane Decorated by MXene Multilayered Nanoflakes for Wet–Thermal Management

Janus Membrane Decorated by MXene Multilayered Nanoflakes for Wet–Thermal Management

Green and Facile Fabrication of Metal Oxide/Red Phosphorus Composite Catalysts for CO2Photoreduction

Polylactic acid based Janus membranes with asymmetric wettability for directional moisture transport with enhanced UV protective capabilities

Contact Info

Product

Resources

About

Green and Facile Fabrication of Metal Oxide/Red Phosphorus Composite Catalysts for CO₂Photoreduction