Fabrication of a novel nanocomposite SiO2–H3BO3–V2O5–Al2O3 via melt-quenching technique: structural and surface morphological characteristics for carbon dioxide gas sensing applications

Synthesis of a porous SiO2–H3BO3–V2O5–P2O5 glassy composite: structural and surface morphological behaviour for CO2 gas sensing applications

“…The decrease in the density of the prepared glass is probably due to the presence of voids/holes in the structural arrangement of the SHVP6 glass, thus indicating the porous nature of SHVP6 glass. 7…”

“…To obtain accurate results, the density measurement was repeated three times, and the average value was taken into consideration. The density of the synthesized porous glass was calculated by using the formula given below: 7 where, ρ w is the density of distilled water ( ρ w = 1), W 1 is the weight of an empty density bottle, W 2 is the weight of a density bottle with a porous glass sample, W 3 is the weight of density bottle with distilled water and porous glass sample, and W 4 is the weight of the density bottle with distilled water. On the other hand, the molar volume ( V m ) of the porous glass sample was calculated using the formula given in eqn (2)where V m represents the molar volume of the porous glass sample, M represents the molar mass, and ρ is the density of the porous glass sample.…”

“…On the other hand, the molar volume ( V m ) of the porous glass sample was calculated using the formula given in eqn (2)where V m represents the molar volume of the porous glass sample, M represents the molar mass, and ρ is the density of the porous glass sample. 7…”

“…2,3 Gradually, the demand for gas sensors increased for various other applications such as air pollutants, volatile organic compounds (VOCs), fire detection, industrial implants, breath analysers, and many more, which led to the advancement of gas sensors in domestic as well as industrial fields. 4–10…”

“…2,3 Gradually, the demand for gas sensors increased for various other applications such as air pollutants, volatile organic compounds (VOCs), re detection, industrial implants, breath analysers, and many more, which led to the advancement of gas sensors in domestic as well as industrial elds. [4][5][6][7][8][9][10] Recently, porous glass has attracted increasing attention due to its unique properties such as porous structure, chemical and thermal stability, and very reactive surface. 11,12 The porous structure of glass provides a large surface area with various active pore sites to adsorb and desorb gas, which elevates the sensing ability of the sensor, thus making it an excellent gas sensor for many applications.…”