Preparation and Performance Regulation of SrBiB Glass-Ceramics

doi:10.16552/j.cnki.issn1001-1625.2025.1122

Abstract

Abstract:

This study systematically investigated the photocatalytic performance of SrO-Bi₂O₃-B₂O₃（SrBiB） glass-ceramics and their rare-earth-doped upconversion systems under different heat treatment conditions. The results show that 35SrO-25Bi₂O₃-40B₂O₃ after two-step heat treatment exhibit the optimal methylene blue （MB） degradation efficiency （93%） and reaction rate constant （0.008 63 min^-1） within 180 min， which is mainly attributed to its smaller band gap and uniform distribution Bi₆B₁₀O₂₄crystals in the glass matrix. Furthermore， Yb³⁺/Tm³⁺is introduced into the SrBiB glass-ceramics， and a core-shell structured glass-ceramics is successfully constructed through two-step heat treatment combined with HCl chemical etching. XRD， SEM， TEM and other characterizations results confirm that a layered flower-like structure formed on the surface of the etched samples， and the upconversion luminescence intensity gradually increase and the specific surface area significantly increase with the extension of etching time. Photocatalytic performance tests show that sample after HCl etching for 30 min display the best degradation performance under both full-spectrum and near-infrared light （degradation rates of 80% and 63% after 210 min， respectively）， which is attributed to its enhanced visible-near-infrared light absorption， effective carrier separation， and the exposure of active sites promoted by the combined effects of core-shell structure and surface defects. This study provides a new strategy for the design of efficient upconversion photocatalysts with broad-spectrum response and demonstrates promising application potential in fields such as wastewater treatment driven by near-infrared light.

Key words: glass-ceramics, rare earth ion, photocatalytic, upconversion luminescence, two-step heat treatment

CLC Number:

TQ171

GONG Feifan, WANG Jun, WU Yuan, GAO Shengnan, WANG Mitang. Preparation and Performance Regulation of SrBiB Glass-Ceramics[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(3): 1018-1030.

Figures/Tables 14

Table 1 Preparation of SrBiB glass-ceramics samples

Sample	Chemical formula	T_g/℃	T_c/℃	Preparation method
SBBO-1-Asq	28SrO-30Bi₂O₃-42B₂O₃	420	535	Quenching
SBBO-1-1	28SrO-30Bi₂O₃-42B₂O₃	420	535	One-step heat treatment
SBBO-1-2	28SrO-30Bi₂O₃-42B₂O₃	420	535	Two-step heat treatment
SBBO-2-Asq	32SrO-21Bi₂O₃-47B₂O₃	424	537	Quenching
SBBO-2-1	32SrO-21Bi₂O₃-47B₂O₃	424	537	One-step heat treatment
SBBO-2-2	32SrO-21Bi₂O₃-47B₂O₃	424	537	Two-step heat treatment
SBBO-3-Asq	35SrO-25Bi₂O₃-40B₂O₃	440	550	Quenching
SBBO-3-1	35SrO-25Bi₂O₃-40B₂O₃	440	550	One-step heat treatment
SBBO-3-2	35SrO-25Bi₂O₃-40B₂O₃	440	550	Two-step heat treatment

Table 2 Preparation of upconversion SrBiB glass-ceramic samples

Sample	Chemical formula	Preparation method
SBBO-5Yb-Asq	31.6SrF₂-31.6Bi₂O₃-31.6B₂O₃-5Yb₂O₃-0.2Tm₂O₃	Quenching
SBBO-5Yb-HT	31.6SrF₂-31.6Bi₂O₃-31.6B₂O₃-5Yb₂O₃-0.2Tm₂O₃	480 ℃ 6 h+580 ℃ 3 h
SBBO-10Yb-Asq	30SrF₂-30Bi₂O₃-29.8B₂O₃-10Yb₂O₃-0.2Tm₂O₃	Quenching
SBBO-10Yb-HT	30SrF₂-30Bi₂O₃-29.8B₂O₃-10Yb₂O₃-0.2Tm₂O₃	480 ℃ 6 h+580 ℃ 3 h
SBBO-HCl-5	31.6SrF₂-31.6Bi₂O₃-31.6B₂O₃-5Yb₂O₃-0.2Tm₂O₃	0.1 mol/L HCl etching 5 min
SBBO-HCl-15	31.6SrF₂-31.6Bi₂O₃-31.6B₂O₃-5Yb₂O₃-0.2Tm₂O₃	0.1 mol/L HCl etching 15 min
SBBO-HCl-30	31.6SrF₂-31.6Bi₂O₃-31.6B₂O₃-5Yb₂O₃-0.2Tm₂O₃	0.1 mol/L HCl etching 30 min
SBBO-HCl-60	31.6SrF₂-31.6Bi₂O₃-31.6B₂O₃-5Yb₂O₃-0.2Tm₂O₃	0.1 mol/L HCl etching 60 min

Fig.1 DSC curves of SrBiB matrix glass， XRD patterns of quenched and heat-treated samples of three-component SrBiB glasses

Fig.2 SEM images of samples SBBO-1-Asq， SBBO-1-1， SBBO-1-2， SBBO-2-Asq， SBBO-2-1， SBBO-2-2， SBBO-3-Asq， SBBO-3-1， and SBBO-3-2

Fig.3 C/C0 curves and ln（C/C0） versus time plots of SrBiB heat-treated samples

Fig.4 DSC curves of upconversion SrBiB matrix glass

Fig.5 XRD patterns of rare earth doped quenched glass and heat-treated glass， and SBBO-5Yb-HT GCs samples etched with 0.1 mol/L HCl for 5， 15， 30， and 60 min

Fig.6 PL spectra of heat-treated samples of rare-earth-doped upconversion glass and SBBO-5Yb-HT GCs samples etched with 0.1 mol/L HCl for 5， 15， 30， and 60 min.

Fig.7 SEM images of SBBO-5Yb-HT， SBBO-HCl-5， SBBO-HCl-15， SBBO-HCl-30， and SBBO-HCl-60

Fig.8 TEM， HRTEM images， and element distribution mappings of SBBO-HCl-30 sample

Fig.9 Nitrogen adsorption-desorption curves of SBBO-5Yb-HT and SBBO-HCl-30 samples

Fig.10 UV-Vis-NIR absorption spectra and Tauc spectra of SBBO-5Yb-HT and 0.1 mol/L HCl etched GCs for 5， 15， 30， and 60 min

Fig.11 C/C0 curves and ln（C/C0） versus time plots of SBBO-5Yb-HT and 0.1 mol/L HCl etched GCs for 5， 15， 30， and 60 min under full-spectrum light， and C/C0 curves and ln（C/C0） versus time plots of SBBO-5Yb-HT and 0.1 mol/L HCl etched GCs for 5， 15， 30， and 60 min under near-infrared light

Fig.12 Degradation rate of SBBO-HCl-30 sample under near-infrared and full-spectrum light

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