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rare earth(Gd,La) co-doped ZnO nanoflowers for direct sunlight driven photocatalytic activity

Journal of rare Earths 2023年第1期41卷 77-84页

作者： Baskaran Palanivel romulo r.macadangdang jr.md shahadat.hossain Fahad A.Alharthi Mohanraj Kumar Jih-Hsing Chang Sreedevi Gedi Department of Physics Kings Engineering CollegeSriperumbudurKancheepuram602117TamilnaduIndia Department of Medical Technology Institute of Arts and SciencesFar Eastern UniversityManilaPhilippines Department of Innovation Systems Engineering Graduate School of EngineeringUtsunomiya UniversityYoto 7-1-2Utsunomiya321-8585Japan Chemistry Department College of ScienceKing Saud UniversityRiyadh1145Saudi Arabia Department of Environmental Engineering and Management Chaoyang University of Technology168Jifeng E.Rd.Wufeng DistrictTaichung41349TaiwanChina School of Chemical Engineering Yeungnam UniversityGyeongsan38541Republic of Korea

In this work Gd/La@ZnO nanoflower photocatalyst was successfully synthesized by a co-precipitation method and applied for rhodamine B(rh B) and tetracycline(TCN) degradation under direct sunlight *** doping of rare earth elements extends the optical absorption wavelength of ZnO from UV region(390 nm) to visible-light region(401 nm).In addition,the co-doped ZnO nanoflower exhibits a lower charge recombination efficiency which was confirmed by photoluminescence emission ***,the co-doped ZnO nanoflower exhibits the maximum degradation efficiency of 91% for rh B and 74% for TCN under sunlight *** calculated synergistic index of co-doped ZnO is higher than that of the pure *** radicals’ production was confirmed by terephthalic acid(TA) and nitro-blue tetrazolium(NBT) *** holes and hydroxyl(·OH) radicals play the major role in degradation reaction and it was confirmed by scavenger’s ***,the recycling test confirms the stability of the photocatalyst.

关键词： Gd La ZnO Nanoflower Photocatalyst Sunlight

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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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