Abstract
Two-step synthesis of Fe2O3 particles, performed by precipitation from iron(III) chloride (FeCl3?6H2O) using ammonium hydroxide in first step and calcination at 400 and 700?C during 4 h, provided Fe2O3 400?C and Fe2O3 700?C photocatalysts, respectively. The electrospinning process was used to prepare iron oxide fibers, named Fe2O3 fiber. Morphological and structural properties of samples were determined by Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), Fourier Transform Infra-Red (FT-IR) and BET/BJH analysis. It was found that the ?-Fe2O3 phase (hematite) has shown the compaction of the structure at 700?C, i.e. lower textural properties. Hematite particles and fibers are used for bisphenol A (BPA) removal by photocatalytic decomposition and the enhanced catalytic performance was found with the use of Fe2O3 400?C particles.
Highlights
Iron oxide plays an important role in many geological and biological processes and represents a very important material due to its non-toxicity, low cost, catalytic activity, and biocompatibility
Hematite particles and fibers are used for bisphenol A (BPA) removal by photocatalytic decomposition and the enhanced catalytic performance was found with the use of Fe2O3 400 oC particles
An interesting phenomenon is noticed for α-Fe2O3 fibers. Their higher efficiency was superior for 34.4 % compared to α-Fe2O3 700 oC particles, this may be prescribed to the porous surface morphology (Fig. 1) due to the poly(vinyl alcohol) (PVA) removal. These results suggest that the simple method at lower temperatures for obtaining α-Fe2O3 particles may be used for BPA removal whose efficiency is almost identical to α-Fe2O3 fibers obtained by more demanding process
Summary
Iron oxide plays an important role in many geological and biological processes and represents a very important material due to its non-toxicity, low cost, catalytic activity, and biocompatibility. Different techniques may be used in the preparation of powdered hematite: hydrothermal technique [7], sol-gel method [8] and co-precipitation method [9, 10]. Among these techniques, for the preparation of powdered hematite, chemical precipitation is attractive due to low costs, high purity, short preparation time, homogeneous particle distribution and the ability to produce excellent polycrystalline samples
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