Issue 47, 2022

A-site non-stoichiometric defects engineering in xPt–La0.9Fe0.75Sn0.25O3−δ hollow nanofiber for high-performance formaldehyde sensor

Abstract

Artificially inducing abundant oxygen vacancies in perovskite-structured materials is an effective method to improve sensing activity. In this work, we prepared a highly sensitive and stable La0.9Fe0.75Sn0.25O3−δ hollow nanofiber by introducing A-site cation defects in LaFeO3 by electrostatic spinning technique, then combined with a water bath method to uniformly load the surface of La0.9Fe0.75Sn0.25O3−δ with well dispersed xPt (x = 0, 0.5%, 1%, and 1.5%, 2%) elements. Compared with La0.9Fe0.75Sn0.25O3−δ without Pt modification, the xPt–La0.9Fe0.75Sn0.25O3−δ sensing materials exhibited an excellent response to formaldehyde and greatly improved the overall performance of the sensing electrode, especially 1.5%Pt–La0.9Fe0.75Sn0.25O3−δ, achieving a response of 137 for 10 ppm formaldehyde at 160 °C, which is a significant improvement compared to the intrinsic LaFeO3. The improved gas-sensitive achievement is based on the abundant oxygen vacancies induced by the A-site cation defect, the large specific surface area, and the high catalytic activity of Pt(O) elements. This strategy of inducing abundant oxygen vacancies by artificially creating A-site cation defects and modifying noble metals can be used to develop more advanced and novel sensing electrodes.

Graphical abstract: A-site non-stoichiometric defects engineering in xPt–La0.9Fe0.75Sn0.25O3−δ hollow nanofiber for high-performance formaldehyde sensor

Supplementary files

Article information

Article type
Paper
Submitted
01 okt 2022
Accepted
03 noy 2022
First published
11 noy 2022

J. Mater. Chem. C, 2022,10, 17907-17916

A-site non-stoichiometric defects engineering in xPt–La0.9Fe0.75Sn0.25O3−δ hollow nanofiber for high-performance formaldehyde sensor

D. Xu, Y. Zhang, Q. Zhu, Z. Song, Z. Deng, B. Zi, J. Zhang, J. Zhao and Q. Liu, J. Mater. Chem. C, 2022, 10, 17907 DOI: 10.1039/D2TC04185E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements