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2D/2D/0D TiO2/C3N4/Ti3C2 MXene composite S-scheme photocatalyst with enhanced CO2 reduction activity

He, Fei ; Zhu, Bicheng ; Cheng, Bei ; Yu, Jiaguo ; Ho, Wingkei ; Macyk, Wojciech

Applied catalysis. B, Environmental, 2020-09, Vol.272, p.119006, Article 119006 [Periódico revisado por pares]

Amsterdam: Elsevier BV

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Título:
2D/2D/0D TiO2/C3N4/Ti3C2 MXene composite S-scheme photocatalyst with enhanced CO2 reduction activity
Autor: He, Fei ; Zhu, Bicheng ; Cheng, Bei ; Yu, Jiaguo ; Ho, Wingkei ; Macyk, Wojciech
Assuntos: Carbon dioxide ; Carbon nitride ; Charge transfer ; Electron paramagnetic resonance ; Electron spin resonance ; Electrostatic properties ; Heterojunctions ; Photocatalysts ; Photoelectron spectroscopy ; Photoelectrons ; Quantum dots ; Reduction ; Structural design ; Structural engineering ; Titanium dioxide
É parte de: Applied catalysis. B, Environmental, 2020-09, Vol.272, p.119006, Article 119006
Descrição: Herein, two-dimensional (2D) TiO2 mesoporous nanosheets with three to four C3N4 layers grown in situ are employed to design a core–shell 2D/2D van der Waals heterojunction (TiO2/C3N4). Edge-terminated zero-dimensional (0D) Ti3C2 MXene quantum dots (TCQD) are subsequently integrated in the C3N4 surface via electrostatic interactions. The constructed 2D/2D/0D TiO2/C3N4/Ti3C2 composite heterojunction photocatalyst exhibits enhanced CO2 reduction activity compared to TiO2, C3N4, TiO2/C3N4, C3N4/Ti3C2 for CO and CH4 production. A step-scheme (S-scheme) charge transfer mechanism operates for the prepared samples during CO2 reduction, as authenticated by in situ X-ray photoelectron spectroscopy and electron paramagnetic resonance analysis. This study provides a paradigm of a rational structural design for regulating the number and type of heterointerfaces and further insights into the mechanism of multijunction photocatalysts.
Editor: Amsterdam: Elsevier BV
Idioma: Inglês

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2D/2D/0D TiO2/C3N4/Ti3C2 MXene composite S-scheme photocatalyst with enhanced CO2 reduction activity

He, Fei ; Zhu, Bicheng ; Cheng, Bei ; Yu, Jiaguo ; Ho, Wingkei ; Macyk, Wojciech

Amsterdam: Elsevier BV

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