Exploring the Si-precursor composition for inline coating and agglomeration of TiO2 via modular spray-flame and plasma reactor

Combustion, Chemistry, and Carbon Neutrality

“…662,667,679 Introducing plasma discharges can serve to provide additional process opportunities by involving charged particles and supporting nonequilibrium conditions (see also Section 4.1). 662,679 Flame spray pyrolysis on an industrial scale delivers important commodities such as carbon black, fumed SiO 2 , and TiO 2 as a pigment and photocatalyst. 663,664,667,668 Recent contributions to combustion synthesis have targeted several materials of interest for specific applications, of which only a few examples can be given here.…”

“…682 Loṕez-Caḿara et al have demonstrated the possibility of inline coating during the combustion synthesis by producing core−shell nanoparticles of TiO 2 coated with SiO 2 . 679 As shown by Manuputty et al, one-step flame synthesis of TiO 2 can also provide access to different oxide modifications by controlling the flame conditions, with an example of their results given in Figure 41. 683 All nanoparticles shown in Figure 41 were prepared in a premixed ethene/oxygen/argon stagnation flame configuration, and resulting deposited powders were analyzed by XRD, XPS, SAED, TEM, and HRTEM.…”

“…Also, flame-synthesized “pure” particles generally do not suffer from undesired surface layers or contaminants from solvents and process reagents . Although metal oxides are readily accessible using oxygen as the oxidizer in flames, the process is not limited to oxides, and further materials, coatings as well as metal nanoparticle/composites can be produced. ,, Introducing plasma discharges can serve to provide additional process opportunities by involving charged particles and supporting nonequilibrium conditions (see also Section ). , Flame spray pyrolysis on an industrial scale delivers important commodities such as carbon black, fumed SiO 2 , and TiO 2 as a pigment and photocatalyst. ,,, …”

“…Furthermore, Pt/TiO 2 with atomically dispersed Pt loading on the TiO 2 surface has been obtained from combustion synthesis; it was prepared for use as a photocatalyst for hydrogen production by water splitting and was shown to exhibit superior performance . López-Cámara et al have demonstrated the possibility of inline coating during the combustion synthesis by producing core–shell nanoparticles of TiO 2 coated with SiO 2 . As shown by Manuputty et al, one-step flame synthesis of TiO 2 can also provide access to different oxide modifications by controlling the flame conditions, with an example of their results given in Figure …”