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BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2026, Vol. 45 ›› Issue (3): 1018-1030.DOI: 10.16552/j.cnki.issn1001-1625.2025.1122

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Preparation and Performance Regulation of SrBiB Glass-Ceramics

GONG Feifan(), WANG Jun, WU Yuan, GAO Shengnan, WANG Mitang()   

  1. School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,China
  • Received:2025-11-13 Revised:2026-01-21 Online:2026-03-20 Published:2026-04-10
  • Contact: WANG Mitang

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 Bi6B10O24 crystals 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: