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Effect of mesoporous FA-SiO2 extracted from fly ash on the structural and photocatalytic properties of g-C3N4-based materials
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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, 1998, -1(-1): .
@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",
volume="-1",
number="-1",
pages="",
year="1998",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2400308"
}
%0 Journal Article
%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
%V -1
%N -1
%P
%@ 1673-565X
%D 1998
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2400308
TY - JOUR
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
VL - -1
IS - -1
SP -
EP -
%@ 1673-565X
Y1 - 1998
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2400308
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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