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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/00216305:26620/23:PU147393

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/LTC20019" target="_blank" >LTC20019: New multi-component aerogels for environmental catalysis</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Sol-Gel Science and Technology

ISSN

0928-0707

e-ISSN

1573-4846

Svazek periodika

105

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

18

Strana od-do

471-488

Kód UT WoS článku

000901977800002

EID výsledku v databázi Scopus

2-s2.0-85144337653