Effect of Cr and La co-doping on the photocatalytic hydrogen production performance of Sr1-xLaxTi1-xCrxO3 nanofibers

Kaiyuan Su; Xiao Liu; Tianjin Zhang; Jincan Li; Fenghua Luo; Changlai Yuan; Fei Liu

Catalysis Communications (Feb 2023)

Effect of Cr and La co-doping on the photocatalytic hydrogen production performance of Sr1-xLaxTi1-xCrxO3 nanofibers

Kaiyuan Su,
Xiao Liu,
Tianjin Zhang,
Jincan Li,
Fenghua Luo,
Changlai Yuan,
Fei Liu

Affiliations

Kaiyuan Su: Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, PR China
Xiao Liu: Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, PR China; Corresponding author.
Tianjin Zhang: School of Material Science and Engineering, Central South University, Changsha 410083, PR China; Corresponding author.
Jincan Li: Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, PR China
Fenghua Luo: School of Material Science and Engineering, Central South University, Changsha 410083, PR China
Changlai Yuan: Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, PR China
Fei Liu: School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, PR China

Journal volume & issue: Vol. 175
p. 106601

Abstract

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The Sr1-xLaxTi1-xCrxO3 (x = 0–0.05) nanofibers were synthesized by electrospinning based on Pechini sol-gel method. The prepared Sr1-xLaxTi1-xCrxO3 nanofibers were analyzed by XRD, Raman, UV–vis spectra, XPS, SEM, TEM, transient photocurrent, electrochemical impedance and photocatalytic hydrogen evolution tests. The results showed that CrLa co-doped can expand the light absorption region of SrTiO3 from the ultraviolet region to the visible light, and significantly narrowed its band gap. Under visible light irradiation, Sr1-xLaxTi1-xCrxO3 nanofibers exhibited the best hydrogen evolution activity at x = 0.03, and the hydrogen evolution rate reached 106.2 μmol∙g−1∙h−1. This may be the result of the combined effect of the intermediate band gap and the band gap variation due to Cr doping.

Published in Catalysis Communications

ISSN: 1566-7367 (Print); 1873-3905 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Chemistry
Website: https://www.journals.elsevier.com/catalysis-communications

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