Optical, structural, morphological and chemical properties of doped TiO2 nanoparticles with FeCl3

To achieve high photocatalytic activity, TiO2 nanoparticles nanoparticles require an excitation source in ultraviolet radiation. Incorporating chemical elements into the TiO2 lattice can tune its band gap, resulting in an edge-shifted red absorption to reduce energies, improving photocatalytic perfo...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 2407; no. 1; pp. 012001 - 12012
Main Authors Afonso, Cátia, Segundo, Iran Rocha, Lima, Orlando, Landi, Salmon, Homem, Natália, Costa, Manuel F. M., Freitas, Elisabete, Carneiro, Joaquim
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.12.2022
Subjects
Absorption
Anatase
band gap energy
Catalytic activity
Chemical elements
Chemical properties
diffuse reflectance
Doping
Energy gap
Ferric chloride
Fourier transforms
Infrared spectroscopy
Iron chlorides
nano-TiO
Nanoparticles
Optical properties
Photocatalysis
Physics
Pollutants
semiconductor nanoparticles
Spectrum analysis
Titanium
Titanium dioxide
Ultraviolet radiation
X-ray diffraction
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Summary:To achieve high photocatalytic activity, TiO2 nanoparticles nanoparticles require an excitation source in ultraviolet radiation. Incorporating chemical elements into the TiO2 lattice can tune its band gap, resulting in an edge-shifted red absorption to reduce energies, improving photocatalytic performance in the visible region of the electromagnetic spectrum. In this research, TiO2 semiconductor nanoparticles were subjected to a doping process using iron chloride (FeCl3) powder to activate photocatalysis under visible light and consequently improve pollutant capture. To study the effectiveness of the doping process, the main ratios (1:1), (1:1.622) and (1:3) of TiO2:FeCl3 were evaluated using Diffuse Reflectance Spectroscopy (DRS), X-ray diffraction (XRD), Fourier-Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). The main results of this research show that doping TiO2 with FeCl3 shifted the absorption edge to longer wavelength values, changing the optical properties of the material and decreasing the band gap (Eg) of TiO2 compared to the undoped TiO2 (reference). There are no relevant differences between the XRD pattern of the samples with TiO2-FeCl3 and TiO2 nanoparticles (reference). The fraction of the anatase phase in doped TiO2 nanoparticles has the same magnitude as the reference TiO2. Regarding FTIR, the Fe-doping process alters the TiO2 reference spectrum, increasing the intensity of hydroxyl bonds and peaks particularly, indicating the Ti-O-Fe bond vibration.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2407/1/012001