The electrochemical, dielectric, and ferroelectric properties of Gd and Fe doped LaNiO3 with an efficient solar-light driven catalytic activity to oxidize malachite green dye

Shahid Iqbal; Ismat Bibi; Farzana Majid; Kashif Jilani; Shagufta Kamal; Munawar Iqbal; Sadia Ata; Nosheen Nazar; Hind Albalawi; Norah Alwadai

doi:10.1016/j.jcis.2021.08.209

The electrochemical, dielectric, and ferroelectric properties of Gd and Fe doped LaNiO₃ with an efficient solar-light driven catalytic activity to oxidize malachite green dye

J Colloid Interface Sci. 2022 Feb;607(Pt 1):568-583. doi: 10.1016/j.jcis.2021.08.209. Epub 2021 Sep 2.

Authors

Shahid Iqbal¹, Ismat Bibi², Farzana Majid³, Kashif Jilani⁴, Shagufta Kamal⁵, Munawar Iqbal⁶, Sadia Ata⁷, Nosheen Nazar⁸, Hind Albalawi⁹, Norah Alwadai⁹

Affiliations

¹ Institute of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan.
² Institute of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan. Electronic address: drismat@iub.edu.pk.
³ Department of Physics, University of the Punjab, Lahore, Pakistan.
⁴ Department of Biochemistry, University of Agriculture, Faisalabad, Pakistan.
⁵ Department of Applied Chemistry and Biochemistry, GC University, Faisalabad, Pakistan.
⁶ Department of Chemistry, The University of Lahore, Lahore, Pakistan. Electronic address: bosalvee@yahoo.com.
⁷ School of Chemistry, University of the Punjab, Lahore, Pakistan.
⁸ Institute of Chemical Sciences, Bahauddin Zakariya University, Multan 60800, Pakistan.
⁹ Department of Physics, College of Sciences, Princess Nourah bint Abdulrahman University (PNU), Riyadh 11671, Saudi Arabia.

PMID: 34509732
DOI: 10.1016/j.jcis.2021.08.209

Abstract

This work investigates the effects of double ion substitution on the ferroelectric, electrochemical, dielectric and photocatalytic properties of Gd and Fe doped La_1-yGd_yNi_1-xFe_xO₃ nanoparticles (NPs). La_1-yGd_yNi_1-xFe_xO₃ was fabricated by facile micro-emulsion path and its properties were studied by thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman scattering, Fourier Transform of Infrared (FTIR), energy dispersive x-rays (EDX) techniques. It has a distorted rhombohedral shape with crystallite size within the range of 17-23 nm. The doped material has a spherical heterogeneous morphology, and its surface area increased with increased doping. The electrochemical (CV, EIS, and I-V), conductivity and dielectric (dielectric constant and low dielectric & tangent loss) properties of La_1-yGd_yNi_1-xFe_xO₃ were dependent on the contents of the dopants (Gd and Fe). The doped material had improved specific capacitance compared to the undoped LaNiO₃ due to the synergistic effect of Gd and Fe on the doped materials. The conductivity of Gd and Fe doped LaNiO₃ 5.16 × 10⁴ Sm^-1 was enhanced compared to the undoped LaNiO₃ 3.52 × 10^-2 Sm¹. Furthermore, hysteresis loop was used to investigate the coercivity (Hc), saturation magnetization (Ms) and remanence (Mr) of the material. The Ms and Mr values were enhanced with the content of the dopants. The photocatalytic activity (PCA) of the material in degrading malachite green (MG) dye was studied. La_1-yGd_yNi_1-xFe_xO₃ NPs was able to degrade up to 96.4% of the dye under visible light irradiation in 50 min. La_1-yGd_yNi_1-xFe_xO₃ has remarkable dielectric, electrochemical, ferroelectric and photo-catalytic properties and have potential applications in microwave, electrical, electronic, energy storage devices. It is also an active photo-catalyst material for the removal/oxidation of toxic pollutants from the environment.

Keywords: Electrochemical; Ferroelectric; Micro-emulsion; Perovskite; Photocatalysis; Solar light harvesting.

MeSH terms

Catalysis
Light*
Rosaniline Dyes*
X-Ray Diffraction

Substances

Rosaniline Dyes
malachite green