Piezocatalysis Dye Degradation Using SrO-Bi2O3‑B2O3 Glass-Ceramics

• Published in: ACS applied engineering materials Vol. 1; no. 1; pp. 295 - 303
• Main Authors: Porwal, Chirag, Sharma, Moolchand, Vaish, Rahul, Chauhan, Vishal Singh
• Format: Journal Article
• Language: English
• Published: American Chemical Society 27.01.2023
• Subjects: glasses; crystallization; piezocatalysis; phytotoxicity; glass-ceramics
• DOI: 10.1021/acsaenm.2c00066
• ISSN: 2771-9545

SrO-Bi2O3-B2O3 (SBBO) transparent glasses were fabricated via the conventional melt quenching technique. X-ray diffraction (XRD) was carried out to confirm the glassy nature. Differential scanning calorimetry (DSC) was utilized to gain knowledge about the crystallization temperature, and following that glass samples were heat-treated to achieve crystallinity. The obtained values of the glass transition temperature (T g), the onset of crystallization temperature (T cr), and the peak crystallization (T p) temperature are 408, 438, and 440 °C, respectively. The glasses were heated at 440 °C for 30 min, 1 h, and 2 h to form glass-ceramics. The SrBi2B2O7 phase was formed during 1 h of heat treatment of the glasses. Studies of active vibration modes were done by Raman spectroscopy for SBBO glass and glass-ceramic samples. Piezocatalysis experiments were carried out for the removal of organic pollutants with Methylene Blue (MB) dye as a model dye, and the obtained maximum dye degradation was 51% with a kinetic rate of 0.002 min–1 under 240 min of ultrasonication. Experiments were repeated for 5 cycles to confirm the repeatability, and different dyes were used for degradation to confirm the reliability of the prepared glass-ceramic sample. Furthermore, Vigna radiata seeds were used to study the byproduct of dye that had been degraded for the assessment of phytotoxicity.