Synthesis, mechanical characterization, and mechanism investigation of graphene-wrapped nano-titanium dioxide composite DOI Creative Commons

Minzhe Li

Matéria (Rio de Janeiro), Journal Year: 2024, Volume and Issue: 29(4)

Published: Jan. 1, 2024

ABSTRACT This study presents the synthesis and characterization of three-dimensional graphene-TiO2 (GT) composites with varying TiO2 content via a hydrothermal method. The exhibited hierarchical porous structure specific surface areas up to 243.9 m2/g, significantly higher than pure (52.3 m2/g). FTIR analysis revealed Ti-O-C bonding, indicating strong interfacial interactions. demonstrated enhanced mechanical properties, GT-3 showing compressive strength 1.15 MPa an elastic modulus 11.3 MPa. Photocatalytic experiments showed that degraded 92% methylene blue under UV light in 120 minutes 67% visible 180 minutes, outperforming TiO2. improved performance was attributed efficient charge separation, as evidenced by electrochemical impedance spectroscopy photoluminescence quenching. excellent reusability, maintaining 94% activity after five cycles. UV-vis diffuse reflectance spectra narrowing band gap from 3.2 eV for 2.5 GT-3, explaining activity. These results demonstrate potential GT environmental remediation applications.

Language: Английский

Synthesis, mechanical characterization, and mechanism investigation of graphene-wrapped nano-titanium dioxide composite DOI Creative Commons

Minzhe Li

Matéria (Rio de Janeiro), Journal Year: 2024, Volume and Issue: 29(4)

Published: Jan. 1, 2024

ABSTRACT This study presents the synthesis and characterization of three-dimensional graphene-TiO2 (GT) composites with varying TiO2 content via a hydrothermal method. The exhibited hierarchical porous structure specific surface areas up to 243.9 m2/g, significantly higher than pure (52.3 m2/g). FTIR analysis revealed Ti-O-C bonding, indicating strong interfacial interactions. demonstrated enhanced mechanical properties, GT-3 showing compressive strength 1.15 MPa an elastic modulus 11.3 MPa. Photocatalytic experiments showed that degraded 92% methylene blue under UV light in 120 minutes 67% visible 180 minutes, outperforming TiO2. improved performance was attributed efficient charge separation, as evidenced by electrochemical impedance spectroscopy photoluminescence quenching. excellent reusability, maintaining 94% activity after five cycles. UV-vis diffuse reflectance spectra narrowing band gap from 3.2 eV for 2.5 GT-3, explaining activity. These results demonstrate potential GT environmental remediation applications.

Language: Английский

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