Morphology of Graphene Aerogel as the Key Factor: Mechanical Properties Under Tension and Compression DOI Creative Commons
Elizaveta A. Rozhnova, Julia A. Baimova

Gels, Journal Year: 2024, Volume and Issue: 11(1), P. 3 - 3

Published: Dec. 25, 2024

Graphene aerogels with high surface areas, ultra-low densities, and thermal conductivities have been attracted a lot of attention in recent years. However, considerable difference their deformation behavior mechanical properties lead to poor performance. The problem can be solved by preparing graphene aerogel given morphology control the through special structure cells. In present work, molecular dynamics simulation is used overview four different morphologies aerogel: honeycomb, cellular, lamellar randomly distributed flakes. All structures are considered under uniaxial compression tension detailed analysis behavior. It found that cellular much better compressibility elasticity. During both tension, transformed from one another controlling compression/tensile direction. highest strength fracture strain for GA along direction perpendicular alignment walls. This reveals controlled enhancing structural morphology. obtained results contribution which provide insights into developments concerning design carbon-based application.

Language: Английский

Pilot-scale LED photocatalytic system utilizing 3D bioinspired sponge photocatalyst for the removal of amoxicillin, tetracycline, and ciprofloxacin from hospital wastewater DOI
Adam Kubiak,

Marta Jaruga

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161758 - 161758

Published: March 1, 2025

Language: Английский

Citations

0
Graphene/Metal Composites Decorated with Ni Nanoclusters: Mechanical Properties DOI Open Access

В. И. Колесников,

Р. А. Миронов,

Julia A. Baimova

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(23), P. 5753 - 5753

Published: Nov. 24, 2024

With the developments in nanotechnology, elaborate regulation of microstructure shows attractive potential design new composite materials. Herein, materials composed graphene network filled with metal nanoparticles are analyzed to optimize fabrication process and mechanical properties. In present work, molecular dynamic simulations used analyze possibility obtaining a structure Ni-decorated graphene. The weak bonding at graphene-copper graphene-aluminum interfaces is manipulated by functionalizing nickel nanoclusters. It found that Ni decoration considerably increases interfacial and, same time, prevents formation strong network. for Al/graphene its ductility 0.6, while increasing it Cu/graphene about 0.5. Ultimate tensile strength Al Cu close equal 22 GPa, respectively. much lower 13 GPa Cu/graphene/Ni 17 Al/graphene/Ni. While Young's modulus 18 GPA, Al/graphene, Al/graphene/Ni, Cu/graphene/Ni, 12 GPa. obtained results demonstrate future prospects modification better enhancement.

Language: Английский

Citations

0
Modulation of the Coordination Environment of Graphene-Loaded NiFe-LDH and PbO2 Catalysts by Plasma for Oxygen Evolution Reaction DOI Open Access
Tingting Yang, Zheng Zhang, Fei Tan

et al.

Catalysts, Journal Year: 2024, Volume and Issue: 15(1), P. 1 - 1

Published: Dec. 24, 2024

The generation of hydrogen through water electrolysis represents a significant advancement in the transition towards low-carbon energy systems. Graphene-supported catalysts have demonstrated potential improving oxygen evolution reaction (OER) among several electrocatalysts utilised for this process. Nonetheless, attaining exact control over morphology and electrical configuration these continues to pose considerable difficulty. This study presents development highly effective electrocatalyst composed graphene-supported NiFe LDH PbO2, incorporating sulphur anions into structure by plasma jet treatment method. By optimising ratio anions, we were able fine-tune local coordination environment, which effectively adjusted properties OH OOH intermediates, thereby OER catalytic performance. introduced vacancy defects catalyst, further regulating its surface electronic structure. After anion optimisation, catalyst exhibited excellent electrocatalytic performance alkaline environments, achieving an overpotential 228 mV at 100 mA·cm−2. performance, along with exceptional stability, exceeds majority previously documented catalysts. results underscore promise optimisation providing insights water-splitting

Language: Английский

Citations

0
Morphology of Graphene Aerogel as the Key Factor: Mechanical Properties Under Tension and Compression DOI Creative Commons
Elizaveta A. Rozhnova, Julia A. Baimova

Gels, Journal Year: 2024, Volume and Issue: 11(1), P. 3 - 3

Published: Dec. 25, 2024

Graphene aerogels with high surface areas, ultra-low densities, and thermal conductivities have been attracted a lot of attention in recent years. However, considerable difference their deformation behavior mechanical properties lead to poor performance. The problem can be solved by preparing graphene aerogel given morphology control the through special structure cells. In present work, molecular dynamics simulation is used overview four different morphologies aerogel: honeycomb, cellular, lamellar randomly distributed flakes. All structures are considered under uniaxial compression tension detailed analysis behavior. It found that cellular much better compressibility elasticity. During both tension, transformed from one another controlling compression/tensile direction. highest strength fracture strain for GA along direction perpendicular alignment walls. This reveals controlled enhancing structural morphology. obtained results contribution which provide insights into developments concerning design carbon-based application.

Language: Английский

Citations

0