JZUS - Journal of Zhejiang University SCIENCE

Journal of Zhejiang University SCIENCE A

Accepted manuscript available online (unedited version)

Effect of mesoporous FA-SiO₂ extracted from fly ash on the structural and photocatalytic properties of g-C₃N₄-based materials

Author(s): Xianhua LI, Qingbo YU
Affiliation(s): The First Affiliated Hospital of Anhui University of Science and Technology (Huainan First People's Hospital), Anhui University of Science and Technology, Huainan 232001, China; more
Corresponding email(s): yuqingbo007@163.com
Key Words: Fly ash; FA-SiO₂; g-C₃N₄-based materials; The structural and photocatalytic properties

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Xianhua LI, Qingbo YU. Effect of mesoporous FA-SiO₂ extracted from fly ash on the structural and photocatalytic properties of g-C₃N₄-based materials[J]. Journal of Zhejiang University Science A,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.A2400308

@article{title="Effect of mesoporous FA-SiO₂ extracted from fly ash on the structural and photocatalytic properties of g-C₃N₄-based materials",
author="Xianhua LI, Qingbo YU",
journal="Journal of Zhejiang University Science A",
year="in press",
publisher="Zhejiang University Press & Springer",
doi="https://doi.org/10.1631/jzus.A2400308"
}

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%T Effect of mesoporous FA-SiO₂ extracted from fly ash on the structural and photocatalytic properties of g-C₃N₄-based materials
%A Xianhua LI
%A Qingbo YU
%J Journal of Zhejiang University SCIENCE A
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%I Zhejiang University Press & Springer
doi="https://doi.org/10.1631/jzus.A2400308"

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T1 - Effect of mesoporous FA-SiO₂ extracted from fly ash on the structural and photocatalytic properties of g-C₃N₄-based materials
A1 - Xianhua LI
A1 - Qingbo YU
J0 - Journal of Zhejiang University Science A
SP -
EP -
%@ 1673-565X
Y1 - in press
PB - Zhejiang University Press & Springer
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doi="https://doi.org/10.1631/jzus.A2400308"

Abstract
Chinese Summary
Academic Network
Reviewer Comment

Abstract: In order to explore high value-added utilization pathways of fly ash, the mesoporous structure of silica extracted from fly ash (FA-SiO₂) was utilized to restrict the dicyandiamide (DCDA) thermal condensation process. This produced chemically bonded interacting composite photocatalysts of FA-SiO₂ and graphitic carbon nitride (g-C₃N₄). Compared with the spherical silica prepared using tetraethyl orthosilicate (TEOS-SiO₂), the mesoporous structure of FA-SiO₂ allowed DCDA to react in a smaller space, which facilitated the transformation of DCDA to melamine by the thermal degradation kinetics of FA-SiO₂/DCDA. This ultimately boosted the formation of an N-atom-removed triazine ring structure and a multistage structure combining lumps and rods in the composite photocatalysts of g-C₃N₄ and FA-SiO₂, which led to a higher visible-light utilization efficiency, a suitable valence-band position, and the photocatalytic activity for methylene blue reaching 3.56 times that of g-C₃N₄. The findings indicate that mesoporous FA-SiO₂ has the potential to remove the structural and photocatalytic properties of g-C₃N₄-based materials.

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