Next Article in Journal
First Utilization of Magnetically-Assisted Photocatalytic Iron Oxide-TiO2 Nanocomposites for the Degradation of the Problematic Antibiotic Ciprofloxacin in an Aqueous Environment
Previous Article in Journal
Controllable Synthesis of Magnetic Composite Derived from MIL-88D and Study on Adsorption Properties of Cu2+
 
 
Font Type:
Arial Georgia Verdana
Font Size:
Aa Aa Aa
Line Spacing:
Column Width:
Background:
Correction

Correction: Grewal et al. Structural and Photocatalytic Studies on Oxygen Hyperstoichiometric Titanium-Substituted Strontium Ferrite Nanoparticles. Magnetochemistry 2022, 8, 120

by
Jaspreet Kaur Grewal
1,
Manpreet Kaur
1,*,
Rajeev K. Sharma
2,
Aderbal C. Oliveira
3,
Vijayendra Kumar Garg
3 and
Virender K. Sharma
4,*
1
Department of Chemistry, Punjab Agricultural University, Ludhiana 141001, Punjab, India
2
Department of Physics, Punjab Agricultural University, Ludhiana 141001, Punjab, India
3
Institute of Physics, University of Brasilia, Brasilia 70000-000, Brazil
4
Program for Environment and Sustainability, Department of Environmental and Occupational Health, School of Public Health, Texas A&M University (TAMU), College Station, TX 77843-1266, USA
*
Authors to whom correspondence should be addressed.
Magnetochemistry 2024, 10(9), 65; https://doi.org/10.3390/magnetochemistry10090065
Submission received: 1 August 2024 / Accepted: 30 August 2024 / Published: 5 September 2024
The authors wish to make a change to the published paper [1].
In the original publication, there was a mistake in Figure 1 as published. The error was introduced due to an overlay issue while compiling the XRD spectra. The corrected Figure 1 appears below:
Due to the mistake introduced in Figure 1, respective adjustments have been made to Table 1, as the calculated parameters are based on values from Figure 1. The corrected Table 1 appears below:
Due to the scaling error, the values connected to Figure 1 and Table 1 were incorrectly introduced in the text.
The following corrections have been made to Results and Discussion, Characterization, Structural Analysis and paragraphs 1–4.
 
The XRD patterns of Sr1−xTixFe2O4+δ (x = 0.0–1.0) NPs are given in Figure 1, and the calculated parameters are given in Table 1. Figure 1(I) suggests the spinel structure of SrFe2O4 with the diffraction peaks at 2ϴ = 30.3 ° , 35.6 ° , 36.6 ° , 43.4 ° , 47.7 ° , 57.3 ° and 62.8 ° , which were ascribed to the (220), (311), (222), (400), (420), (333) and (440) Miller planes, respectively. The observed XRD peaks for SrFe2O4 match with the standard ICDD card no. 00-001-1027 and JCPDS card no. 08–0234. The additional peaks at 2θ = 25.8 ° , 50.1 ° and 53.7 ° were assigned to the hematite (α-Fe2O3) (JCPDS card No. 79–0007). The diffraction peaks of Figure 1(II) are indexed to the pure pseudobrookite-phase TiFe2O5 with an orthorhombic structure, in agreement with JCPDS card no. 87-1996. The XRD patterns of Ti4+-substituted SrFe2O4 NPs (Figure 1(III,IV)) have all shown diffraction peaks of SrFe2O4, with an additional peak at 2θ 32.6 ° , corresponding to an increase with the increased Ti4+ content.
The lattice constant (a) was determined according to the following expression:
a = d ( h 2 + k 2 + l 2 ) 1 2
where a = lattice constant, d = d-spacing and (h,k,l) = Miller planes.
The decrease in the lattice parameter can be described using Vegard’s law, as the smaller radius of the dopant ion compared to the replacing ion favored lattice shrinkage and the lattice constant (a) decreased. The observed decrease in the lattice constant with increased Ti4+ content suggested the substitution (Figure S1). These findings are in good agreement with the results reported by Amaliya et al. [36] and Rao et al. [37] for Ti4+-doped cobalt ferrite.
Figure S1 demonstrates a steady reduction in X-ray density with the enhanced Ti4+ content because of the displacement of Sr2+ ions by Ti4+ ions of lower atomic weight. The lattice distortion caused by the ionic radii difference between the Ti4+ dopant (0.67 Å) and Sr2+ ions (1.18 Å) resulted in the reduction in crystalline size from 39.8 nm to 18 nm (Table 1). The presence of excessive positive charge due to Ti4+ dopant can be compensated either by the generation of cationic vacancies or by oxygen non-stoichiometry that decreased the structure mobility, which resulted in a smaller crystallite size [38]. The presence of oxygen hyerstoichiometry (δ) was confirmed by iodometric titrations [35].
 
Original reference [36] has been removed. With this correction, the order of some references has been adjusted accordingly.
The authors apologize for any inconvenience caused and state that the scientific conclusions are unaffected. This correction was approved by the academic editor. The original publication has also been updated. The above changes do not affect the research and conclusions of the original publication.

Reference

  1. Grewal, J.K.; Kaur, M.; Sharma, R.K.; Oliveira, A.C.; Garg, V.K.; Sharma, V.K. Structural and Photocatalytic Studies on Oxygen Hyperstoichiometric Titanium-Substituted Strontium Ferrite Nanoparticles. Magnetochemistry 2022, 8, 120. [Google Scholar] [CrossRef]
Figure 1. XRD patterns of (I) SrFe2O4, (II) TiFe2O5, (III) Sr0.7Ti0.3Fe2O4.3 and (IV) Sr0.4Ti0.6Fe2O4.6.
Figure 1. XRD patterns of (I) SrFe2O4, (II) TiFe2O5, (III) Sr0.7Ti0.3Fe2O4.3 and (IV) Sr0.4Ti0.6Fe2O4.6.
Magnetochemistry 10 00065 g001
Table 1. XRD parameters, ξ-potential and DLS hydrodynamic particle size of SrFe2O4, TiFe2O5, Sr0.7Ti0.3Fe2O4.3 and Sr0.4Ti0.6Fe2O4.6.
Table 1. XRD parameters, ξ-potential and DLS hydrodynamic particle size of SrFe2O4, TiFe2O5, Sr0.7Ti0.3Fe2O4.3 and Sr0.4Ti0.6Fe2O4.6.
NanomaterialLattice
Constant
(Å)
Experimental
Density (ρexp in g/cm3)
Crystallite Size (nm)XRD Density
XRD in g/cm3)
% Porosityξ-Potential
(mV)
DLS Hydrodynamic Particle Size (nm)
SrFe2O48.3433.2239.87.83558.9013.54123.92
TiFe2O58.7302.1931.73.45045.5214.78105.52
Sr0.7Ti0.3Fe2O4.38.3452.8725.75.64149.1223.54101.79
Sr0.4Ti0.6Fe2O4.68.3862.4318.05.03451.7332.4195.23
Disclaimer/Publisher’s Note: The statements, opinions and data contained in all publications are solely those of the individual author(s) and contributor(s) and not of MDPI and/or the editor(s). MDPI and/or the editor(s) disclaim responsibility for any injury to people or property resulting from any ideas, methods, instructions or products referred to in the content.

Share and Cite

MDPI and ACS Style

Grewal, J.K.; Kaur, M.; Sharma, R.K.; Oliveira, A.C.; Garg, V.K.; Sharma, V.K. Correction: Grewal et al. Structural and Photocatalytic Studies on Oxygen Hyperstoichiometric Titanium-Substituted Strontium Ferrite Nanoparticles. Magnetochemistry 2022, 8, 120. Magnetochemistry 2024, 10, 65. https://doi.org/10.3390/magnetochemistry10090065

AMA Style

Grewal JK, Kaur M, Sharma RK, Oliveira AC, Garg VK, Sharma VK. Correction: Grewal et al. Structural and Photocatalytic Studies on Oxygen Hyperstoichiometric Titanium-Substituted Strontium Ferrite Nanoparticles. Magnetochemistry 2022, 8, 120. Magnetochemistry. 2024; 10(9):65. https://doi.org/10.3390/magnetochemistry10090065

Chicago/Turabian Style

Grewal, Jaspreet Kaur, Manpreet Kaur, Rajeev K. Sharma, Aderbal C. Oliveira, Vijayendra Kumar Garg, and Virender K. Sharma. 2024. "Correction: Grewal et al. Structural and Photocatalytic Studies on Oxygen Hyperstoichiometric Titanium-Substituted Strontium Ferrite Nanoparticles. Magnetochemistry 2022, 8, 120" Magnetochemistry 10, no. 9: 65. https://doi.org/10.3390/magnetochemistry10090065

APA Style

Grewal, J. K., Kaur, M., Sharma, R. K., Oliveira, A. C., Garg, V. K., & Sharma, V. K. (2024). Correction: Grewal et al. Structural and Photocatalytic Studies on Oxygen Hyperstoichiometric Titanium-Substituted Strontium Ferrite Nanoparticles. Magnetochemistry 2022, 8, 120. Magnetochemistry, 10(9), 65. https://doi.org/10.3390/magnetochemistry10090065

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Metrics

Back to TopTop