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structural,morphological,optical and antibacterial performances of rare earth(sm)-doped ZnO nanorods

Journal of Rare Earths 2024年第11期42卷 2119-2127页

作者： A.Ravi J.samuel s.sahaya jude dhas s.Usharani Turibius simon D.senthil Kumar s.K.Jasmin Vijitha A.sivakumar Raju suresh Kumar C.s.Biju Department of Physics University College of Engineering Department of Physics and Research Centre Malankara Catholic College Manonmaniam sundaranar University saveetha school of Engineering Saveetha Institute of Medical and Technical SciencesSaveetha University Department of Chemistry S.I.V.E.T College Department of Biotechnology Vivekanandha College of Arts and Science for Woman (Autonomous) Department of Physics Vel Tech Rangarajan Dr.Sagunthala R & D Institute of Science and Technology Department of Physics & Research Centre Muslim Arts College Key Laboratory of High-temperature and High-pressure study of the Earth's Interior Institute of GeochemistryChinese Academy of Sciences Department of Chemistry College of ScienceKing Saud University Department of Physics St. Alphonsa College of Arts and Science

The significant rise of ultra-violet（UV） radiation and pathogenic infectious bacteria poses a serious threat to global *** researchers' interests are attracted by novel materials with strong UVblocking ability,antibacterial activity and low toxicity to other *** this case,a simple wet chemical method with different annealing temperatures（400,500,and 600℃） was employed to create highly effective rare earth（sm）-doped ZnO ***（101） plane of wurtzite ZnO shifts towards a lower angle with increasing annealing temperature,according to the X-ray diffraction（XRD） study findings,which additionally establishes the consequence of lattice *** of doublet peaks of sm 3d(sm 3d5/2and sm 3d3/2) in the X-ray photoelectron spectroscopy（XPs） spectrum clearly validates the substitution of sm3+ions in the 500℃-annealed *** 500℃-annealed nanorods exhibit combined performances of the wide band gap,improved UV absorbance,and vivid green luminescent emission（563 nm）.Additio nally,the nanorods have favorable UV-blocking execution of 96% for UVA at 360 nm,92% for UVB at 320 nm,and 57% for UVC at 225 nm,which is greater than the majority of ZnO-related materials that have been reported up to this *** doping is also appropriate for improving bacterial inhibition against the two studied strains（Escherichia coli and staphylococcus aureus）,in addition to the intriguing features discussed ***,with maximum inhibition zone diameters of 20±0.72 and 18±0.57 mm,respectively,these nanorods exhibit high inhibitory action against *** and *** bacterial *** rare earth-doped material developed during the current experiment,which was annealed at 500℃,could potentially serve as an effective replacement for UV-blocking and antibacterial material,especially for biomedical applications.

关键词： Bacterial inhibition Metal oxide Rare earth doping UV-shielding Wet chemical method

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Effect of rGO support on Gd@ZnO for UV-visible-light driven photocatalytic organic pollutant degradation

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Journal of Rare Earths 2023年第10期41卷 1525-1531,I0002页

作者： Baskaran Palanivel Md shahadat Hossain Romulo R.Macadangdang Jr. s.sahaya jude dhas Abdullah M.Al-Enizi Mohd Ubaidullah Woo Kyoung Kim sreedevi Gedi s.Ignatius Arockiam Department of Physics Kings Engineering CollegeSriperumbudurKancheepuram602117Tamil NaduIndia Department of Innovation systems Engineering Graduate School of EngineeringUtsunomiya UniversityYoto 7-1-2Utsunomiya 321-8585Japan College of Allied Health National UniversityManila1008Philippines Department of Chemistry College of ScienceKing Saud UniversityRiyadh11451Saudi Arabia school of Chemical Engineering Yeungnam UniversityGyeongsan38541Republic of Korea PG and Research Department of Chemistry GTN Arts CollegeDindigul624005Tamil NaduIndia

In this manuscript,we report the hydrothermally prepared rGO/Gd@ZnO nanocomposite for the utilization of photocatalytic Rh B(rhodamine B)dye *** required characterization techniques were carried out to analyse the structural,morphological,chemical,environmental and optical behaviour of the prepared *** efficiency of the prepared nanoparticles was studied by Rh B dye degradation upon UV-Vis-light illumination which reveals that composite catalyst degrades the dye molecule about 91%after 40 min of *** comparing the higher degradation efficiency of the rGO/Gd@ZnO nanocomposite with that of ZnO and Gd doped ZnO,it reveals a greater reduction of charge carriers'recombination,higher visible-light utilization and higher adsorption *** trapping experiment and recycling test were conducted to study the influence of active radicals for the degradation reaction and to know the stability of the prepared nanocomposite,***,this rGO supported Gd doped ZnO nanocomposite can provide a new path way in preparing a highly efficient photocatalyst for organic pollutant degradation at large.

关键词： rGO Gd doped ZnO UV-Vis photocatalyst Dye degradation Rare earths

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