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

作　　者：Tehmina Kousar Muhammad Aadil Sonia Zulfiqar Sobhy MIbrahim Sidra Mubeen Warda Hassan Kashuf Shafiq Farzana Mahmood 

机构地区：[1]Institute of Chemical Sciences,Bahauddin Zakariya University,Multan,60800,Pakistan [2]Department of Chemistry,Rahim Yar Khan Campus,The Islarnia University of Bahawalpur,Rahim Yar Khan,64200,Pakistan [3]Department of Chemistry,Faculty of Science,University of Ostrava,30.Dubna 22,Ostrava,70103,Czech Republic [4]Department of Chemical and Biological Engineering,Iowa State University,Sweeney Hall,618 Bissell Road,Ames,lowa,50011,United States [5]Department of Biochemistry,College of Science,King Saud University,PO.Box 2455,Riyadh,11451,Saudi Arabi [6]Department of Chemistry,The Women University Multan,66000,Pakistan

出　　处：《Journal of Rare Earths》2024年第5期907-916,I0004,共11页稀土学报（英文版）

基　　金：supported by Researchers Supporting Project(RSP2023R100),King Saud University,Riyadh,Saudi Arabia;the support provided by the Statutory City of Ostrava,Czechia through Research Grant"Global Experts"。

摘　　要：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 photocatalyst material for azo dye mineralization was proposed.A cost-effective combination of wetchemical 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 DCNFO 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 play s 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 asprepared 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.

关 键 词：AZO-DYE Composite GRAPHENE Dy-doped Nanotechnology Rare earths 

分 类 号：TB3[一般工业技术—材料科学与工程]