Simple and Acid-Free Hydrothermal Synthesis of Bioactive Glass 58SiO2-33CaO-9P2O5 (wt%)

Abstract

The paper focuses on the acid-free hydrothermal process for the synthesis of bioactive glass. The new method avoids the use of harmful acid catalysts, which are usually used in the sol-gel process. On the other hand, the processing time was reduced compared with the sol-gel method. A well-known ternary bioactive glass 58SiO2-33CaO-9P2O5 (wt%), which has been widely synthesized through the sol-gel method, was selected to apply to this new process. Thermal behavior, textural property, phase composition, morphology, and ionic exchange were investigated by thermal analysis, N2 adsorption/desorption, XRD, FTIR, SEM, and inductively coupled plasma optical emission spectrometry (ICP-OES) analysis. The bioactivity and biocompatibility of synthetic bioactive glass were evaluated by in vitro experiments with a simulated body fluid (SBF) solution and cell culture medium. The obtained results confirmed that the acid-free hydrothermal process is one of the ideal methods for preparing ternary bioactive glass.

Bio-response of copper–magnesium co-substituted mesoporous bioactive glass for bone tissue regeneration

“…An endothermic asymmetric peak at 462 °C refers to the decomposition of nitrates. 35,36 In the DSC-TGA record of the co-doped 4MC glass (Fig. 1(b)), a mass loss (∼12.75%) in the temperature interval from 40 to 221 °C accompanied by two exothermic peaks at 82 °C and 194 °C was determined and attributed to the removal of adsorbed water molecules.…”

Synthesis of bioactive glass 60SiO2-33CaO-4P2O5-3Ag2O and its application in toothpaste

“…These exothermic peaks are corresponding to the dehydration of ethanol remaining in the drying gel, or removal of alkoxy groups [12-13]. At about 954.98 o C, an endothermic peak without mass loss is appeared due to the melting of the glass phase (melting point) [13]. From the result of TG-DSC analysis, the processing temperature for bioglass synthesis is determined at 600 o C. At this temperature, the remaining water, and organic residues are completely removed.…”

The Effect of Hydrothermal Temperature and Time of Urea-Doping on the Optical Properties of Lemongrass-Based Carbon Dots

“…Hydrothermal methods are methods of synthesis of CNP materials using single or heterogeneous reactions in aqueous solutions at high temperatures (T > 25 °C) and pressures > 100 kPa. The hydrothermal method was chosen because it is relatively simple and does not require equipment complex and expensive (Anh Tuan et al, 2021), but it also has several advantages such as fast heating (Ruiz-Jorge et al, 2021), fast reaction (Auyoong et al, 2013), better results, high purity and efficiency, transformation energy (Babu et al, 2023). The selection of temperatures aims to control the optical properties and intensity of luminescence of CNPs (Kapitonov et al, 2018).…”