TY - JOUR

T1 - Pristine and Reassembled Nanosheets of Layered Perovskite-like Titanates HLnTiO4 and H2Ln2Ti3O10 (Ln = La, Nd) as Photocatalysts for Hydrogen Evolution

AU - Курносенко, Сергей Алексеевич

AU - Silyukov, Oleg

AU - Rodionov, Ivan

AU - Minich, Iana

AU - Zvereva, Irina

PY - 2025/4/2

Y1 - 2025/4/2

N2 - Layered Ruddlesden–Popper titanates HLnTiO4 and H2Ln2Ti3O10 (Ln = La, Nd)have been exfoliated into nanosheets in aqueous tetrabutylammonium hydroxide andsystematically investigated as hydrogen evolution photocatalysts. The nanosheets were tested both in as-prepared pristine form and after reassembly by two methods (simple filtration and precipitation by hydrochloric acid). The nanosheet-based samples demonstratedby up to 88 times greater photocatalytic performance in comparison with the bulkprecursors and, after modification with a Pt cocatalyst, provided apparent quantum efficiencyof hydrogen generation up to 14.2% in 1 mol.% aqueous methanol and 3.15% in pure water. It was established that the form in which the nanosheets are used strongly affects the hydrogen production efficiency: the latter typically decreases when moving from thepristine nanosheets to filtered ones and then to those restacked by hydrochloric acid, whichis determined by the difference in their physical–chemical characteristics being influencedby the reassembly approach.

AB - Layered Ruddlesden–Popper titanates HLnTiO4 and H2Ln2Ti3O10 (Ln = La, Nd)have been exfoliated into nanosheets in aqueous tetrabutylammonium hydroxide andsystematically investigated as hydrogen evolution photocatalysts. The nanosheets were tested both in as-prepared pristine form and after reassembly by two methods (simple filtration and precipitation by hydrochloric acid). The nanosheet-based samples demonstratedby up to 88 times greater photocatalytic performance in comparison with the bulkprecursors and, after modification with a Pt cocatalyst, provided apparent quantum efficiencyof hydrogen generation up to 14.2% in 1 mol.% aqueous methanol and 3.15% in pure water. It was established that the form in which the nanosheets are used strongly affects the hydrogen production efficiency: the latter typically decreases when moving from thepristine nanosheets to filtered ones and then to those restacked by hydrochloric acid, whichis determined by the difference in their physical–chemical characteristics being influencedby the reassembly approach.

KW - photocatalysis; hydrogen; layered perovskite; exfoliation; nanosheets; reassembly

KW - 12 february 2025

KW - 19 january 2025

KW - 21 march 2025

KW - accepted

KW - exfoliation

KW - hydrogen

KW - layered perovskite

KW - nanosheets

KW - photocatalysis

KW - reassembly

KW - received

KW - revised

UR - https://www.mdpi.com/2673-6497/6/2/16

UR - https://www.mendeley.com/catalogue/4f9647fd-246d-3cc2-a80f-f0b5f59cc8d3/

U2 - 10.3390/solids6020016

DO - 10.3390/solids6020016

M3 - Article

VL - 6

JO - Solids

JF - Solids

SN - 2673-6497

IS - 2

M1 - 16

ER -