首页|Facile synthesis of graphene anchored rare earth doped mixed metal ferrite nanorods:A potential candidate for azo dye mineralization

Facile synthesis of graphene anchored rare earth doped mixed metal ferrite nanorods:A potential candidate for azo dye mineralization

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Bandgap tuning using rare earth metals as dopants in ferrite-based photocatalytic materials has received a lot of interest because the Fermi 4f energy of these metals generates a sub-energy state in the bandgap generated by the overlapping of Fe-3d and O-2p orbitals.Herein,dysprosium-doped cobalt-nickel mixed ferrite(D-CNFO)and its graphene-reinforced composite(D-CNFO@G)were prepared and an ideal pho-tocatalyst material for azo dye mineralization was proposed.A cost-effective combination of wet-chemical and ultrasonication methods was used to prepare the doped and composite samples.Advanced characterization methodologies were used to scrutinize the optical,compositional,structural,morphological,and photocatalytic characteristics of as-prepared materials.The X-ray diffraction analysis identified the spinel phase's(cubic)structure,while the electronic spectroscopy examination confirmed the prepared samples'rod-like morphology.The UV/visible absorbance spectrum shows the higher light harvesting behavior of the D-CNFO@G in the visible region.The mineralization performance of the D-CNFO and D-CNFO@G composites was analyzed using Congo-red(an anionic dye),a well-known azo dye.The D-CNFO@G sample removes Congo-red dye at a rate almost 2.4％faster than the D-CNFO sample.The experiment involving trapping free radicals indicates that hydroxyl radical plays a crucial role in dye degradation.Since the D-CNFO@G catalyst is magnetic and can be isolated easily from the photocatalytic system,it shows an awkward cycle activity of more than 96％after five mineralization tests.The as-prepared D-CNFO@G composite is proved as an excellent option for azo dye mineralization because of the combined impacts of rare earth doping,graphene reinforcement and nanotechnology.

azo-dyeCompositeGrapheneDy-dopedNanotechnologyRare earths

Tehmina Kousar、Muhammad Aadil、Sonia Zulfiqar、Sobhy M.Ibrahim、Sidra Mubeen、Warda Hassan、Kashuf Shafiq、Farzana Mahmood

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Institute of Chemical Sciences,Bahauddin Zakariya University,Multan,60800,Pakistan

Department of Chemistry,Rahim Yar Khan Campus,The Islamia University of Bahawalpur Rahim Yar Khan,64200,Pakistan

Department of Chemistry,Faculty of Science,University of Ostrava,30.Dubna 22,Ostrava,701 03,Czech Republic

Department of Chemical and Biological Engineering,Iowa State University,Sweeney Hall,618 Bissell Road,Ames,Iowa,50011,United States

Department of Biochemistry,College of Science,King Saud University,P.O.Box 2455,Riyadh,11451,Saudi Arabia

Department of Chemistry,The Women University Multan,66000,Pakistan

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King Saud University,Riyadh,Saudi ArabiaDepartment of Chemistry,Rahim Yar Khan-CampusIslamia University of Bahawalpur,Bahauddin Zakariya University Multan(Pakistan)Women University Multan,Multan,PakistanStatutory City of Ostrava,Czechia through Research Grant"Global Experts"

RSP2023R100

2024

10.1016/j.jre.2023.07.002

稀土学报(英文版)
中国稀土学会

稀土学报(英文版)

CSTPCDEI
影响因子：1.3
ISSN：1002-0721
年,卷(期)：2024.42(5)
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