Adsorption of hidrogen peroxide on the surface of silica – titania mixed oxide obtained by the sol-gel processing method
This work describes the sol-gel mixed oxide SiO 2 /TiO 2 property, ST, as prepared, and submitted to heat treatment a 773 K, STC. SEM and EDS images show, within magnification used, a uniform distribution of the TiO 2 particles in SiO 2 /TiO 2 matrix. Both, ST and STC adsorb hydrogen peroxide on the...
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| Format: | Article |
| Language: | English |
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Universidade Estadual Paulista
2018-09-01
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| Series: | Eclética Química |
| Online Access: | https://revista.iq.unesp.br/ojs/index.php/ecletica/article/view/990 |
| _version_ | 1818357663600214016 |
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| author | José Eduardo Gonçalves U. P. R. Filho D. W. Franco Yoshitaka Gushikem |
| author_facet | José Eduardo Gonçalves U. P. R. Filho D. W. Franco Yoshitaka Gushikem |
| author_sort | José Eduardo Gonçalves |
| collection | DOAJ |
| description | This work describes the sol-gel mixed oxide SiO 2 /TiO 2 property, ST, as prepared, and submitted
to heat treatment a 773 K, STC. SEM and EDS images show, within magnification used, a uniform
distribution of the TiO 2 particles in SiO 2 /TiO 2 matrix. Both, ST and STC adsorb hydrogen peroxide on the
surface and through EPR and UV-Vis diffuse reflectance spectra, it was possible to conclude that the
species on the surface is the peroxide molecule attached to the Lewis acid site of titanium particle
surface, α Ti(H 2 O 2 ) + . As the material is very porous, presumably the hydrogen peroxide molecule is
confined in the matrix pores on the surface, a reason why the adsorbed species presents an exceptional
long lived stability. |
| first_indexed | 2024-12-13T20:16:41Z |
| format | Article |
| id | doaj.art-55874d72026e49f6ae3ebfad0b9e3f5e |
| institution | Directory Open Access Journal |
| issn | 1678-4618 |
| language | English |
| last_indexed | 2024-12-13T20:16:41Z |
| publishDate | 2018-09-01 |
| publisher | Universidade Estadual Paulista |
| record_format | Article |
| series | Eclética Química |
| spelling | doaj.art-55874d72026e49f6ae3ebfad0b9e3f5e2022-12-21T23:32:47ZengUniversidade Estadual PaulistaEclética Química1678-46182018-09-01322414510.26850/1678-4618eqj.v32.2.2007.p41-45990Adsorption of hidrogen peroxide on the surface of silica – titania mixed oxide obtained by the sol-gel processing methodJosé Eduardo Gonçalves0U. P. R. Filho1D. W. Franco2Yoshitaka Gushikem3Centro Universitário de Ensino Superior, CESUMAR, Av Guedner 1610, 87050-390 , Maringá, PR, BrazilInstituto de Química de São Carlos, USP, São Carlos, SP, BrazilInstituto de Química de São Carlos, USP, São Carlos, SP, BrazilInstituto de Química, UNICAMP, CP 6154, 13084-862 Campinas, SP, BrazilThis work describes the sol-gel mixed oxide SiO 2 /TiO 2 property, ST, as prepared, and submitted to heat treatment a 773 K, STC. SEM and EDS images show, within magnification used, a uniform distribution of the TiO 2 particles in SiO 2 /TiO 2 matrix. Both, ST and STC adsorb hydrogen peroxide on the surface and through EPR and UV-Vis diffuse reflectance spectra, it was possible to conclude that the species on the surface is the peroxide molecule attached to the Lewis acid site of titanium particle surface, α Ti(H 2 O 2 ) + . As the material is very porous, presumably the hydrogen peroxide molecule is confined in the matrix pores on the surface, a reason why the adsorbed species presents an exceptional long lived stability.https://revista.iq.unesp.br/ojs/index.php/ecletica/article/view/990 |
| spellingShingle | José Eduardo Gonçalves U. P. R. Filho D. W. Franco Yoshitaka Gushikem Adsorption of hidrogen peroxide on the surface of silica – titania mixed oxide obtained by the sol-gel processing method Eclética Química |
| title | Adsorption of hidrogen peroxide on the surface of silica – titania mixed oxide obtained by the sol-gel processing method |
| title_full | Adsorption of hidrogen peroxide on the surface of silica – titania mixed oxide obtained by the sol-gel processing method |
| title_fullStr | Adsorption of hidrogen peroxide on the surface of silica – titania mixed oxide obtained by the sol-gel processing method |
| title_full_unstemmed | Adsorption of hidrogen peroxide on the surface of silica – titania mixed oxide obtained by the sol-gel processing method |
| title_short | Adsorption of hidrogen peroxide on the surface of silica – titania mixed oxide obtained by the sol-gel processing method |
| title_sort | adsorption of hidrogen peroxide on the surface of silica titania mixed oxide obtained by the sol gel processing method |
| url | https://revista.iq.unesp.br/ojs/index.php/ecletica/article/view/990 |
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