Effect of protonation on the photocatalytic activity of the K2La2Ti3O10 layered oxide in the reaction of hydrogen production

Результат исследований: Научные публикации в периодических изданияхстатья

5 Цитирования (Scopus)

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Abstract: The K2La2Ti3O10 layered oxide was synthesized by high-temperature technique. Ion exchange properties of K2La2Ti3O10·H2O were investigated by continuous potentiometric titration of its suspension in KOH with HCl. The shape of the titration curve indicates that the ion-exchange reaction of interlayer K+ to H+ proceeds at pH 7.5–8.5 at the rate as high as 5% min−1. Samples obtained during the titration experiment at pH 9.8, 4.8, and 1.4 were examined by XRD, TG, ICP-AES, and SEM–EDX. Protonation already occurs at pH > 9.8, while at pH 4.8 a substitution degree of 76% is observed. K2La2Ti3O10 was found to be unstable against K+ leaching, which results in irreversible ion-exchange even when the sample is washed with distilled water. The protonation of the layered oxide significantly suppresses its photocatalytic activity in the reaction of hydrogen production from aqueous isopropanol solution, which correlates with the decreasing amount of intercalated water. Graphical abstract: [Figure not available: see fulltext.].

Язык оригиналаанглийский
Страницы (с-по)475-482
Число страниц8
ЖурналMonatshefte fur Chemie
Том149
Номер выпуска2
DOI
СостояниеОпубликовано - 1 фев 2018

Отпечаток

Protonation
Hydrogen production
Titration
Oxides
Ion exchange
2-Propanol
Water
Leaching
Suspensions
Substitution reactions
Experiments
Temperature

Предметные области Scopus

  • Химия (все)

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abstract = "Abstract: The K2La2Ti3O10 layered oxide was synthesized by high-temperature technique. Ion exchange properties of K2La2Ti3O10·H2O were investigated by continuous potentiometric titration of its suspension in KOH with HCl. The shape of the titration curve indicates that the ion-exchange reaction of interlayer K+ to H+ proceeds at pH 7.5–8.5 at the rate as high as 5{\%} min−1. Samples obtained during the titration experiment at pH 9.8, 4.8, and 1.4 were examined by XRD, TG, ICP-AES, and SEM–EDX. Protonation already occurs at pH > 9.8, while at pH 4.8 a substitution degree of 76{\%} is observed. K2La2Ti3O10 was found to be unstable against K+ leaching, which results in irreversible ion-exchange even when the sample is washed with distilled water. The protonation of the layered oxide significantly suppresses its photocatalytic activity in the reaction of hydrogen production from aqueous isopropanol solution, which correlates with the decreasing amount of intercalated water. Graphical abstract: [Figure not available: see fulltext.].",
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Effect of protonation on the photocatalytic activity of the K2La2Ti3O10 layered oxide in the reaction of hydrogen production. / Rodionov, Ivan A.; Mechtaeva, Elizaveta V.; Burovikhina, Alena A.; Silyukov, Oleg I.; Toikka, Maria A.; Zvereva, Irina A.

В: Monatshefte fur Chemie, Том 149, № 2, 01.02.2018, стр. 475-482.

Результат исследований: Научные публикации в периодических изданияхстатья

TY - JOUR

T1 - Effect of protonation on the photocatalytic activity of the K2La2Ti3O10 layered oxide in the reaction of hydrogen production

AU - Rodionov, Ivan A.

AU - Mechtaeva, Elizaveta V.

AU - Burovikhina, Alena A.

AU - Silyukov, Oleg I.

AU - Toikka, Maria A.

AU - Zvereva, Irina A.

PY - 2018/2/1

Y1 - 2018/2/1

N2 - Abstract: The K2La2Ti3O10 layered oxide was synthesized by high-temperature technique. Ion exchange properties of K2La2Ti3O10·H2O were investigated by continuous potentiometric titration of its suspension in KOH with HCl. The shape of the titration curve indicates that the ion-exchange reaction of interlayer K+ to H+ proceeds at pH 7.5–8.5 at the rate as high as 5% min−1. Samples obtained during the titration experiment at pH 9.8, 4.8, and 1.4 were examined by XRD, TG, ICP-AES, and SEM–EDX. Protonation already occurs at pH > 9.8, while at pH 4.8 a substitution degree of 76% is observed. K2La2Ti3O10 was found to be unstable against K+ leaching, which results in irreversible ion-exchange even when the sample is washed with distilled water. The protonation of the layered oxide significantly suppresses its photocatalytic activity in the reaction of hydrogen production from aqueous isopropanol solution, which correlates with the decreasing amount of intercalated water. Graphical abstract: [Figure not available: see fulltext.].

AB - Abstract: The K2La2Ti3O10 layered oxide was synthesized by high-temperature technique. Ion exchange properties of K2La2Ti3O10·H2O were investigated by continuous potentiometric titration of its suspension in KOH with HCl. The shape of the titration curve indicates that the ion-exchange reaction of interlayer K+ to H+ proceeds at pH 7.5–8.5 at the rate as high as 5% min−1. Samples obtained during the titration experiment at pH 9.8, 4.8, and 1.4 were examined by XRD, TG, ICP-AES, and SEM–EDX. Protonation already occurs at pH > 9.8, while at pH 4.8 a substitution degree of 76% is observed. K2La2Ti3O10 was found to be unstable against K+ leaching, which results in irreversible ion-exchange even when the sample is washed with distilled water. The protonation of the layered oxide significantly suppresses its photocatalytic activity in the reaction of hydrogen production from aqueous isopropanol solution, which correlates with the decreasing amount of intercalated water. Graphical abstract: [Figure not available: see fulltext.].

KW - Catalysis

KW - Perovskite

KW - Phase transformations

KW - Photolysis

KW - Titanate

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DO - 10.1007/s00706-017-2105-7

M3 - Article

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JO - Monatshefte fur Chemie

JF - Monatshefte fur Chemie

SN - 0026-9247

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ER -