Preparation and Photoelectric Properties of C-LaFeO 3 Composites

Shudan Li (), Man Li, Mingjian Xu, Xueying Li and Kun Gao ()
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Shudan Li: School of Food Engineering, Harbin University, Harbin 150086, China
Man Li: School of Food Engineering, Harbin University, Harbin 150086, China
Mingjian Xu: School of Food Engineering, Harbin University, Harbin 150086, China
Xueying Li: School of Food Engineering, Harbin University, Harbin 150086, China
Kun Gao: School of Food Engineering, Harbin University, Harbin 150086, China

Sustainability, 2022, vol. 15, issue 1, 1-10

Abstract: The C spheres synthesized by a hydrothermal method were used as a C source, which was doped with LaFeO 3 to obtain C-LaFeO 3 composites with different C contents (5%, 10%, 15%, and 20%). The effects of C content on the structure, morphology, and photoelectric properties of LaFeO 3 were investigated experimentally. The results show that C doping does not change the crystal structure of LaFeO 3 . The proper amount of C doping improves the photocatalytic and electrochemical activities of the composites. However, excessive C reduces the photocatalytic and electrochemical activities of the C-LaFeO 3 composites. Comparing the different C contents, when the C content is 15%, the photocatalytic performance of C-LaFeO 3 photodegrading methylene blue solution (MB) under visible light is the best, reaching an efficiency of 97%. In addition, electrochemical tests in a 6 M KOH electrolyte solution demonstrate that C doping significantly improves the redox reaction capacity, and the specific capacitance of 15% C-LaFeO 3 (466.08) F/g) at a current density of 0.5 A/g is about 2.5 times that of LaFeO 3 (180.10 F/g). Furthermore, EIS studies show that that the ion diffusion resistance of the 15% C-LaFeO 3 electrode decreased, which is indicative of good electrochemical performance.

Keywords: C-doped LaFeO 3; low temperature solid phase reactions; photocatalytic properties; electrochemical properties (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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