Synthesis and photocatalytic activity of LaTiO2N using titanium oxide nanosheet/La3+ hybrids as a precursor

Xiong Tao; Tatsuki Tsugawa; Kazuto Hatakeyama; Shintaro Ida

doi:10.1039/D3SE01684F

Synthesis and photocatalytic activity of LaTiO₂N using titanium oxide nanosheet/La³⁺ hybrids as a precursor†

Xiong Tao,^a Tatsuki Tsugawa,^a Kazuto Hatakeyama

^ab and Shintaro Ida

*^abc

Author affiliations

* Corresponding authors

^a Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, Japan
E-mail: ida-s@kumamoto-u.ac.jp

^b Institute of Industrial Nanomaterials (IINa), Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, Japan

^c Center for Energy Systems Design (CESD), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819–0395, Japan

Abstract

LaTiO₂N, which has attracted attention as a promising candidate for photocatalytic water splitting, was synthesized through a method that utilized a titania nanosheet/La³⁺/La(OH)₃ hybrid system as a precursor. Through FE-SEM and HAADF-STEM measurements with atomic resolution, it has been revealed that LaTiO₂N possesses a nano-particle morphology characterized by highly crystalline particles in the size range of 5–20 nm, which aggregate to form larger nano-particles with sizes ranging from 50 to 100 nm. The BET surface area of the LaTiO₂N was 30.3 m² g⁻¹. Compared to the photocatalytic O₂ evolution activity in the presence of the sacrificial agent of LaTiO₂N synthesized from La₂Ti₂O₇, the LaTiO₂N synthesized from the titania nanosheet/La³⁺/La(OH)₃ hybrids exhibited three times higher O₂ evolution activity (AQY: 1.3%) under light irradiation with a wavelength of 420 nm.

This article is part of the themed collection: Solar Fuels and Chemicals: Photocatalytic Water Splitting and CO2 Reduction

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Article information

DOI: https://doi.org/10.1039/D3SE01684F
Article type: Paper
Submitted: 22 Dec 2023
Accepted: 07 Feb 2024
First published: 21 Feb 2024

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Sustainable Energy Fuels, 2024,8, 1269-1279

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Synthesis and photocatalytic activity of LaTiO₂N using titanium oxide nanosheet/La³⁺ hybrids as a precursor

X. Tao, T. Tsugawa, K. Hatakeyama and S. Ida, Sustainable Energy Fuels, 2024, 8, 1269 DOI: 10.1039/D3SE01684F

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