TiO2/SiO2 dopant-free nanophotocatalysts for highly efficient photocatalytic water splitting: Challenging traditional TiO2-based systems

Ruiz, Yolice Patricia Moreno; Escobar, Cícero Coelho de; Skovroinski, E.; Weibel, Daniel Eduardo; Santos, João Henrique Zimnoch dos

doi:10.1016/j.molstruc.2022.133792

Cited by 4 publications

(1 citation statement)

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“…These results correlated with Pakdeland.Daoud's [23] previous ndings.Additionally, the anataserutile transformation with calcination at 1000°C and 1200 °C was highly delayed in the TiO 2 -SiO 2 nanocomposites. This phenomenon was also observed even at low Si:Ti ratioss can be observed in gure 4,.Moreno et al [24] explained this by the fact that the formation of this amorphous SiO 2 phase was considered to be important in retarding the anatase-to-rutile phase transition because the aerogels synthesized with ethyl orthosilicate (TEOS) and acetic acid had a good thermal stability at hightemperature of anatase. Finally, the amorphous SiO 2 was concluded to be a stronger inhibitor of the phase transformation of TiO 2 nanopowders at temperatures greater than 1200°C which wouldaffect the mechanical properties of the resulting nanocomposites as was rightly explained by Vega, Olaya, and Ruiz [25].…”

Section: Iii12 Xrd Analysis Of the Nanocompositesmentioning

confidence: 99%

Mechanical and thermal properties of a nanocomposite made of a polymer matrix reinforced by a binary nanoparticle TiO2 - SiO2 produced by sol-gel method

Zahrouni

Benammar

Harzallah

et al. 2023

Preprint

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This study investigated the effect of adding 5% wt of SiO2-TiO2 nanoparticles to polyester-fiberglass on the structural, mechanical and thermal behaviours of the nanocomposite. For this purpose, scanning electron microscopy (SEM) and a Fourier transform infrared spectroscopy (FTIR) were used to examine the surface modification and morphology of the nanocomposites. After the heat treatment of this materialat different compositions, it was observed that its crystalline state was changed and a rutile structure appeared in the treated nanofillers. However, the presence of SiO2 seemed to prevent the complete conversion to this structure. Hence, this change in the microstate affected the mechanical and behavior of the nanocomposite. Indeed, theaddition of 5% wt divided in 75%SiO2-25%TiO2 to the nanocomposite increasedits Young’s modulus by 15.15% and its microhardness by 14%. Furthermore, in terms of thermal behaviour, the addition of 5% wt divided in 75%SiO2-25%TiO2 yieldeda thermal resistance of TG = 49.66 °C. These results would imply the production of nanocomposite with a specific high resistance, a high modulus and a good fatigue resistance which would present a potential replacement for other materials in various industrial applications.

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Section: Iii12 Xrd Analysis Of the Nanocompositesmentioning

confidence: 99%