Crystallization behaviour, structure, and photocatalytic properties of SiO2-B2O3-Li2O-WO3-Bi2O3 glass-ceramics containing Bi2WO6 crystals

SiO2-B2O3-Li2O-WO3-Bi2O3 system parent glass was prepared by the melt-quenching method and glass-ceramics containing the Bi2WO6 crystals were obtained by a one-step heat treatment. The crystallization kinetics of the parent glass were investigated, and the effect of the different heat-treatment regi...

Full description

Saved in:
Bibliographic Details
Published in:Ceramics international 2024-12, Vol.50 (24), p.55556-55565
Main Authors: Wu, Tingxiao, Luo, Zhiwei, He, Longqing, Liang, Haozhang, Ma, Nanshan, Lu, Anxian
Format: Article
Language:English
Subjects:
Bi2WO6 crystals
Dye degradation
Glass-ceramics
Photocatalysis
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:SiO2-B2O3-Li2O-WO3-Bi2O3 system parent glass was prepared by the melt-quenching method and glass-ceramics containing the Bi2WO6 crystals were obtained by a one-step heat treatment. The crystallization kinetics of the parent glass were investigated, and the effect of the different heat-treatment regimes on the microscopic morphology and optical bandgaps of the glass-ceramics was discussed. The results show that the crystallization activation energy of the parent glass is about 300 kJ/mol and the precipitated Bi2WO6 crystals exist in a columnar structure. As obtained from the UV–Vis spectra, the glass-ceramic with a heat treatment regime of 640 °C/2 h has the smallest optical bandgap (2.45 eV). During the photocatalytic degradation of methylene blue dye, the glass-ceramic with a heat treatment regime of 640 °C/2 h shows the best catalytic degradation performance, reaching a dye degradation rate of 76 % at 120 min. The experimental results indicate that glass-ceramics containing Bi2WO6 crystals have promising applications in the field of sewage treatment.
ISSN:0272-8842
DOI:10.1016/j.ceramint.2024.10.416