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

• Published in: Catalysis communications 2023-02, Vol.175, p.106601, Article 106601
• Main Authors: Su, Kaiyuan, Liu, Xiao, Zhang, Tianjin, Li, Jincan, Luo, Fenghua, Yuan, Changlai, Liu, Fei
• Format: Article
• Language: English
• Subjects: Cr-La co-doped SrTiO3; Electrospinning; Nanofibers; Photocatalytic
• ISSN: 1566-7367; 1873-3905
• DOI: 10.1016/j.catcom.2023.106601

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. •A new type Cr/La co-doped strontium titanate nanofibers with high aspect ratio were prepared by electrospinning.•The visible light hydrogen production rate of Cr/La co-doped strontium titanate is 106.2 μmol∙g−1∙h−1.•The mechanism of improving hydrogen production performance of Cr/La co-doped strontium titanate was analyzed.