Scholarlink

<p>This study focuses on the fabrication of nano-sized α-Fe<sub>2</sub>O<sub>3</sub> fibers via electrospinning process as a base photoanode material for hydrogen production by water splitting. By varying electrospinning process parameters, namely needle size and applied voltage, the smallest average fiber diameter of 227&#xa0;nm was obtained by using 32G needle at 30&#xa0;kV. The average fiber diameter decreased from 453 to 227&#xa0;nm as the voltage was increased from 2 to 30&#xa0;kV for 32G needle (smallest size). The fiber diameter decreased from 558 to 227&#xa0;nm as the needle diameter was decreased. The solution of polyvinylpyrrolidone (PVP) and Fe(NO<sub>3</sub>)<sub>3</sub> was used to fabricate electrospun composite fibers which were later annealed. The formation of the α-Fe<sub>2</sub>O<sub>3</sub> fibers after annealing process was confirmed by x-ray diffraction (XRD) and x-ray photoelectron spectroscopy (XPS) measurements. To produce a photoanode, the smallest‐diameter electrospun hematite fibers were&#xa0;selected for expected higher photocurrent values due to more active surface area and shorter electron–hole charge carrier diffusion lengths. These nanofibers were coated on fluorine doped tin oxide (FTO) glass via spin coating process. The band gap value (E<sub>g</sub>) of the synthesized α-Fe<sub>2</sub>O<sub>3</sub> fibers was calculated from UV-Vis spectrometer measurement to be 1.9&#xa0;eV. This value is well suited for photoelectrochemical water splitting. Photocurrent value of the photoanode was measured to be 1.1&#xa0;µA/cm<sup>2</sup> at 1.65&#xa0;V versus RHE. This study demonstrates that the electrospun nano α-Fe<sub>2</sub>O<sub>3</sub> fibers are a promising material for fabricating photoanode for green hydrogen production.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Fabrication of the Electrospun Hematite Nano Fibers by Varying Electrospinning Process Parameters: A Photoanode Material for Hydrogen Production through Water Splitting

  • 期刊论文

  • 发表日期：

    2025年12月16日

查看全文
  • Şükrü Kaya,
  • Cevat Sarıoğlu

摘要

This study focuses on the fabrication of nano-sized α-Fe2O3 fibers via electrospinning process as a base photoanode material for hydrogen production by water splitting. By varying electrospinning process parameters, namely needle size and applied voltage, the smallest average fiber diameter of 227 nm was obtained by using 32G needle at 30 kV. The average fiber diameter decreased from 453 to 227 nm as the voltage was increased from 2 to 30 kV for 32G needle (smallest size). The fiber diameter decreased from 558 to 227 nm as the needle diameter was decreased. The solution of polyvinylpyrrolidone (PVP) and Fe(NO3)3 was used to fabricate electrospun composite fibers which were later annealed. The formation of the α-Fe2O3 fibers after annealing process was confirmed by x-ray diffraction (XRD) and x-ray photoelectron spectroscopy (XPS) measurements. To produce a photoanode, the smallest‐diameter electrospun hematite fibers were selected for expected higher photocurrent values due to more active surface area and shorter electron–hole charge carrier diffusion lengths. These nanofibers were coated on fluorine doped tin oxide (FTO) glass via spin coating process. The band gap value (Eg) of the synthesized α-Fe2O3 fibers was calculated from UV-Vis spectrometer measurement to be 1.9 eV. This value is well suited for photoelectrochemical water splitting. Photocurrent value of the photoanode was measured to be 1.1 µA/cm2 at 1.65 V versus RHE. This study demonstrates that the electrospun nano α-Fe2O3 fibers are a promising material for fabricating photoanode for green hydrogen production.