Centrifugally spun hematite Fe2O3 hollow fibers: Efficient photocatalyst for H2 generation and CO2 reduction

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2024-12-17 DOI:10.1016/j.apsusc.2024.162132

Nasrollah Naseri Joda, Miroslava Filip Edelmannová, David Pavliňák, Vinicius T. Santana, Pavan Kumar Chennam, Martina Rihova, Kamila Kočí, Jan M. Macak

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引用次数: 0

Abstract

Mesoporous hollow hematite Fe₂O₃ fibers were successfully synthesized through centrifugal spinning and applied in photocatalytic H₂ production and CO₂ reduction. Fabrication of hollow hematite fibers includes two innovative synthetic steps, i) centrifugal spinning of precursor fibers using polyvinylpyrrolidone (PVP) as a polymeric part and two different Fe precursors (iron nitrate and iron chloride), ii) annealing of these fibers with different temperatures profiles (250 °C and 600 °C) with optimized heating rates and durations. The prepared samples (FN250, FN600, FC250, and FC600) were thoroughly characterized using SEM, XRD, XPS, and Raman spectroscopy, and the obtained results were correlated with the photocatalytic performance during H₂ production and CO₂ reduction. The FC250 and FC600 samples, which showed a higher concentration of oxygen defects, exhibited superior photocatalytic efficiency compared to the Fe₂O₃ standard. The enhanced performance is attributed to the increased light absorption, improved charge separation, and surface reactivity due to oxygen-related defects. These results highlight the potential of non-stoichiometric Fe₂O₃ nanofibers for environmental remediation and energy conversion applications.

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.