Influence of substituted acetic acids on 'bridge' synthesis of highly photocatalytic active heterophase TiO2 in hydrogen production

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F23%3A00569351" target="_blank" >RIV/67985891:_____/23:00569351 - isvavai.cz</a>
Alternative codes found
RIV/00216305:26620/23:PU147393
Result on the web
<a href="https://doi.org/10.1007/s10971-022-06011-8" target="_blank" >https://doi.org/10.1007/s10971-022-06011-8</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10971-022-06011-8" target="_blank" >10.1007/s10971-022-06011-8</a>

Result language
angličtina
Original language name
Influence of substituted acetic acids on 'bridge' synthesis of highly photocatalytic active heterophase TiO2 in hydrogen production
Original language description
Anatase/brookite nanoparticles were prepared by low-temperature hydrolysis and polycondensation of titanium isopropoxide in the presence of low concentrations of acetic acid substituted in the alpha-position with Cl, F, NH2 or OH groups. A bridging mechanism described the formation of TiO2 with heterophase junctions between anatase and brookite. Substituted acetic acids formed short Ti---X-CH2-COO---Ti bridges that held neighboring Ti species close together and facilitated their condensation and the formation of Ti-O-Ti bonds. The structure of the anatase-brookite heterophase junctions was located and fully characterized by HR-TEM. The most acidic acetic acids substituted with groups with a strongly negative inductive effect, monochloroacetic, dichloroacetic, trichloroacetic, trifluoroacetic and amino acetic acids, supported the formation of TiO2, which in cooperation with the Pt cocatalyst had photocatalytic activity, 144.6-165.6 mu mol H-2/min. g, in the production of hydrogen. All photocatalysts had a pronounced mesoporous structure and a large specific surface area (212.6 to 247.2 m(2)/g), which contributed to the high photocatalytic activity.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry

Project
<a href="/en/project/LTC20019" target="_blank" >LTC20019: New multi-component aerogels for environmental catalysis</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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