Synthesis of TiO2–SiO2 aerogel via ambient pressure drying: effects of sol pre-modification on the microstructure and pore characteristics

Liu, Jingxiao; Shi, Fei; Bai, Lu-Nan; Feng, Xiang; Wang, Xiao-Ka; Bao, Lei

doi:10.1007/s10971-013-3190-7

Cited by 28 publications

(7 citation statements)

References 22 publications

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“…The crystallite size depends on the TiO 2 content in the composite, and the average particle diameter increased with increasing TiO 2 . These results are in good agreement with those reported by previous studies on the synthesis of SiO 2 /TiO 2 [18, 19, 20]. A higher TiO 2 content in the synthesis causes the particle size of the aggregates to increase as a consequence of the larger size of the pre-formed TiO 2 nanoparticles during the sol–gel transition [16].…”

Section: Resultssupporting

confidence: 92%

Physicochemical characteristics and photocatalytic performance of TiO2/SiO2 catalyst synthesized using biogenic silica from bamboo leaves

Fatimah

Prakoso

Sahroni

et al. 2019

Heliyon

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In this work, TiO2/SiO2 composite photocatalysts were prepared using biogenic silica extracted from bamboo leaves and titanium tetraisopropoxide as a titania precursor via a sol–gel mechanism. A study of the physicochemical properties of materials as a function of their titanium dioxide content was conducted using Fourier transform infrared spectroscopy, a scanning electron microscope, a diffuse reflectance ultraviolet-visible (UV-vis) spectrophotometer, and a gas sorption analyzer. The relationship between physicochemical parameters and photocatalytic performance was evaluated using the methylene blue (MB) photocatalytic degradation process under UV irradiation with and without the addition of H2O2 as an oxidant. The results demonstrated that increasing the TiO2 helps enhance the parameters of specific surface area, the pore volume, and the particle size of titanium dioxide, while the band gap energy reaches a maximum of 3.21 eV for 40% and 60% Ti content. The composites exhibit photocatalytic activity with the MB degradation with increasing photocatalytic efficiency since the composites with 40 and 60% wt. of TiO2 demonstrated the higher degradation rate compared with TiO2 in the presence and absence of H2O2. This higher rate is correlated with the higher specific surface area and band gap energy compared with those of TiO2.

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Section: Resultssupporting

confidence: 92%

Physicochemical characteristics and photocatalytic performance of TiO2/SiO2 catalyst synthesized using biogenic silica from bamboo leaves

Fatimah

Prakoso

Sahroni

et al. 2019

Heliyon

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“…Supercritical drying procedures can be avoided by following an ambient pressure drying protocol. This has been presented by Liu et al for Si/Ti binary mixed oxide aerogels by a two-step surface modification with decamethyltetrasiloxane/ trimethylchlorosilane or hexamethyldisiloxane/ trimethylchlorosilane followed by treatment with trimethylchlorosilane in hexane [52]. Sun et al presented an approach relying on hydrolysis and condensation reactions in the highly viscous polymer matrix of polypropylene.…”

Section: Page 8 Of 18mentioning

confidence: 99%

Mixed metal oxide aerogels from tailor-made precursors

Feinle

Hüsing

2015

The Journal of Supercritical Fluids

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“…Therefore, a composite of a functional material and a silica or alumina aerogel have been examined. Example include an aerogel composed of titania and silica 6) and a composite of metallic nickel and an alumina aerogel, 7) which exhibited superior catalytic performance. In addition, we have prepared a ferrite-silica aerogel nanocomposite from a mixture of silica sol and ferrite nanoparticles using a supercritical drying process.…”

Section: Introductionmentioning

confidence: 99%

Addition of BaTiO<sub>3</sub> and carbon nanoparticles to silica aerogel and its dielectric properties

Katagiri

Adachi

Ota

2014

J. Ceram. Soc. Japan

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A tetramethylorthosilicate(TMOS)/ethanol solution was gelled together with BaTiO 3 nanoparticles or carbon nanoparticles. The wet gel was dried in supercritical carbon dioxide, resulting in aerogel nanocomposites with compositions in the range of BaTiO 3 / SiO 2 = 1/100 to 20/100 and C/SiO 2 = 20/100 to 80/100. The bulk density of the aerogel obtained was in the range of 0.1 to 0.2 g/cm 3 , the porosity was about 95%, and the specific surface area was in the range of 400 to 700 m 2 /g. These values represent the characteristics of the aerogel. The relative permittivity and dielectric loss were respectively approximately 2 and 5 © 10 ¹3 for the BaTiO 3 -silica aerogel nanocomposite, and in the range of 5 to 10 and 0.012 to 0.4 for the carbon-silica aerogel nanocomposite.

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Synthesis of TiO2–SiO2 aerogel via ambient pressure drying: effects of sol pre-modification on the microstructure and pore characteristics

Cited by 28 publications

References 22 publications

Physicochemical characteristics and photocatalytic performance of TiO2/SiO2 catalyst synthesized using biogenic silica from bamboo leaves

Physicochemical characteristics and photocatalytic performance of TiO2/SiO2 catalyst synthesized using biogenic silica from bamboo leaves

Mixed metal oxide aerogels from tailor-made precursors

Addition of BaTiO<sub>3</sub> and carbon nanoparticles to silica aerogel and its dielectric properties

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