Controlling Thickness of Aurivillius Phase Perovskite Nanosheets Obtained by Delaminating Bi2SrNa n-2Nb n O3n+3 (n=2-5) Layered Crystal

被引：5

作者：

Awaya, Keisuke ^{[2
]}

Hatakeyama, Kazuto ^{[1
]}

Ida, Shintaro ^{[1
]}

机构：

[1] Kumamoto Univ, Inst Ind Nanomat IINa, Kumamoto 8608555, Japan

[2] Kumamoto Univ, Fac Adv Sci & Technol, Kumamoto 8608555, Japan

来源：

CHEMISTRY OF MATERIALS | 2023年 / 35卷 / 24期

关键词：

OXIDE-ION CONDUCTIVITY; COMPLEX BISMUTH OXIDES; HYDROGEN-PRODUCTION; CHEMISTRY; FILM; PHOTOCATALYSTS; BI2WO6; SR; CA;

D O I：

10.1021/acs.chemmater.3c02062

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A monolayer Bi-doped SrNan-2NbnO3n+12- (n = 2, 3, 4, 5) nanosheet was obtained by delaminating an Aurivillius-phase layered perovskite Bi2SrNan-2NbnO3n+3. The thickness of the Bi-doped SrNan-2NbnO3n+12- nanosheet was successfully controlled by changing the n values of the precursor layered crystals by using a simple calcination method. The mechanical property of the Bi-doped SrNan-2NbnO3n+12- nanosheets was evaluated by comparing phase delay by AFM measurement, which indicated that the thicker perovskite crystal was more perpendicularly deformable. HAADF-STEM observation confirmed that the A site of the Bi-doped SrNa2Nb4O132- perovskite nanosheet was partially occupied by Bi. EDS study also proved that 9-13% of the A site in the Bi-doped SrNan-2NbnO3n+12- nanosheet was occupied with Bi. Further investigation on the crystal structure of the Bi-doped SrNan-2NbnO3n+12- nanosheet was performed with in-plane XRD patterns, Raman spectra, and FE-SEM images. The band gap energy, flat-band potential, and photoelectrocatalytic activity for oxidation of methanol were studied with (photo)electrochemical measurements and correlated to the number of n values.

引用

页码：10524 / 10532

页数：9

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