Effect of Fe dopant on oxygen vacancy variation and enhanced photocatalysis hydrogen production of LaMnO3 perovskite nanofibers

被引：12

作者：

Zhan, Meiling ^{[1
]}

Fang, Minghao ^{[1
]}

Li, Liangyu ^{[1
]}

Zhao, Yajing ^{[1
]}

Yang, Bozhi ^{[1
]}

Min, Xin ^{[1
]}

Du, Pengpeng ^{[1
]}

Liu, Yan'gai ^{[1
]}

Wu, Xiaowen ^{[1
]}

Huang, Zhaohui ^{[1
]}

机构：

[1] China Univ Geosci, Engn Res Ctr,Minist Educ Geol Carbon Storage & Low, Sch Mat Sci & Technol, Beijing Key Lab Mat Utilizat Nonmet Minerals & Sol, Beijing 100083, Peoples R China

来源：

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2023年 / 166卷

关键词：

Electrospinning; Perovskites; Nanofiber; Photocatalysis hydrogen production; PERFORMANCE; NANOPARTICLES; GENERATION; COMPOSITE; OXIDATION; OXIDES;

D O I：

10.1016/j.mssp.2023.107697

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In the pursuit of enhancing the property of photocatalytic hydrogen production, strategies for enhancing light absorption and the separation and transport efficiency of photo-induced carriers have been studied. Perovskite photocatalyst has great application potential in the field of photocatalytic hydrogen production due to its special crystal structure. LaMn(1-x)FexO3 (x = 0-0.08) perovskite nanofibers with diameters of 50-200 nm were synthesized by electrospinning, and their photochemical properties were investigated. The results of UV-Vis diffuse reflectance spectroscopy, PL spectroscopy, I-t, and EIS revealed that the doping with Fe could improve light absorption and reduce the recombination rate of photogenerated electron-hole pairs, and improve the separation and transfer efficiency of photogenerated electron-hole pairs, likely due to the increased concentration of oxygen vacancies caused by doping. Through optimization of the Fe doping amount, an improved hydrogen production efficiency of 767.71 mu mol h(-1) g(-1) was achieved for LaMn0 center dot 96Fe0 center dot 04O3, which is 2.5 times the efficiency of undoped LaMnO3 (300.74 mu mol h(-1) g(-1)). These results provide a new idea for the development of efficient photocatalysts for hydrogen production.

引用

页数：10

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