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001-es BibID:BIBFORM107513
035-os BibID:(WOS)000901977800002 (Scopus)85144337653
Első szerző:Cihlář, Jaroslav
Cím:Influence of substituted acetic acids on "bridge" synthesis of highly photocatalytic active heterophase TiO2 in hydrogen production / Jaroslav Cihlar, Lizeth Katherine Tinoco Navarro, Jaroslav Cihlar, Vit Kasparek, Jan Michalicka, Klara Castkova, Istvan Lazar, Jaroslav Kastyl, Ladislav Celko, Michal Vesely, Petr Dzik
Dátum:2023
ISSN:0928-0707 1573-4846
Megjegyzések: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.
Tárgyszavak:Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
photocatalysis
titania
heterojunction
hydrogen production
Sol-gel synthesis
Bridge mechanism
Heterophase anatase-brookite
Megjelenés:Journal of Sol-Gel Science and Technology. - 105 : 2 (2023), p. 471-488. -
További szerzők:Navarro, Lizeth Katherine Tinoco Cihlář, Jaroslav (Jr.) Kasparek, Vit Michalicka, Jan Castkova, Klara Lázár István (1959-) (vegyész) Kaštyl, Jaroslav Čelko, Ladislav Vesely, Michal Dzik, Petr
Pályázati támogatás:COST
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