Enhanced activity of sol–gel prepared SnOx–TiO2 in photocatalytic methanol reforming

Majrik, Katalin; Tálas, Emı́lia; Pászti, Zoltán; Sajó, István E.; Mihály, Judith; Korecz, L.; Drotár, Eszter; Tompos, András

doi:10.1016/j.apcata.2013.06.047

Cited by 15 publications

(19 citation statements)

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“…In accordance with our previous findings [33], Ti 3+ (g ǁ =1.944, g⊥=1.989) [56] could not be observed either in the calcined or in the hydrogenated samples. However, the in situ formation of Ti 3+ under the photocatalytic reaction followed its reoxidation cannot be excluded.…”

Section: Results Of Esr Measurementssupporting

confidence: 79%

“…The photocatalytic reaction was carried out in liquid phase in a reactor system of 10 quartz glass units equipped with magnetic stirrers, gas inputs and outputs as described before [33]. The size of the cylindrical glass units were: 60 mm in height and 140 mm in 7 diameter.…”

Section: Photocatalytic Hydrogen Generationmentioning

confidence: 99%

“…Tin free (no-Sn) and tin modified (SnOx-SG) TiO 2 samples were prepared by sol-gel method as described before [33]. catalysts is depicted in Figure 1.…”

Section: Synthesis Of Photocatalystsmentioning

confidence: 99%

“…temperature of calcination: 400 o C) was used for preparation of TiO 2 based photocatalysts [33]. Our TEM and SEM measurements indicated the presence of micron sized aggregates built from polycrystalline anatase in those samples.…”

mentioning

confidence: 99%

“…No evidence for tin incorporation into the lattice of TiO 2 was found by the above characterization methods. Nevertheless band broadening in Raman spectra and surface enrichment in Sn detected by XPS suggested that TiO 2 decorated with amorphous tin-oxide islands was obtained [33]. This type of tin-oxide together with metallic Pt nanoparticles formed by high temperature hydrogen treatment as a cocatalyst system considerably improved the photocatalytic activity of TiO 2 in the methanol photocatalytic reforming reaction [33].…”

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confidence: 99%

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PtOx-SnOx-TiO2 catalyst system for methanol photocatalytic reforming: Influence of cocatalysts on the hydrogen production

et al. 2018

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Abstract:Effects of modification of PtO x -TiO 2 photocatalysts by tin were elucidated by exploring relationships between the structural properties of variously prepared tin-loaded catalysts and their catalytic activity in methanol photocatalytic reforming. Tin free and amorphous tinoxide decorated TiO 2 samples were prepared by sol-gel method from titanium-isopropoxide.In other approach, Sn was loaded onto the sol-gel prepared TiO 2 by impregnation followed by calcination. Pt was introduced by impregnation followed by either reduction in H 2 at 400 o C or calcination at 300 o C. TEM, XRD and Raman spectroscopic measurements proved that TiO 2 existed in the form of aggregates of polycrystalline anatase with primary particle size of 15-20 nm in each of the samples. Photocatalytic hydrogen production was influenced by the combined effect of many parameters. Both the presence of Sn and the way of Pt co-catalyst formation played important role in the activity of these photocatalysts. The Sn introduction by both sol-gel method and impregnation clearly enhanced the photocatalytic activity.

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Section: Results Of Esr Measurementssupporting

confidence: 79%

Section: Photocatalytic Hydrogen Generationmentioning

confidence: 99%

“…Tin free (no-Sn) and tin modified (SnOx-SG) TiO 2 samples were prepared by sol-gel method as described before [33]. catalysts is depicted in Figure 1.…”

Section: Synthesis Of Photocatalystsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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