Thestructuralandopticalproperties,aswellasdielectriccharacteristicsatvariousfrequencies(0.1Hz —20MHz)andtemperatures,T(300–400K),ofhydrothermallysynthesizedSnO2nanoparticles, Cu/SnO2,andFe/SnO2compositeshavebeeninvestigated.Thecrystalstructureismostlyformedofa tetragonal SnO2phase,withasecondphaseofmonoclinicCuOorrhombohedralFe2O3detectedin Cu/SnO2,andFe/SnO2composites,respectively.Thedirectopticalbandgap,residualdielectric constant,anddensityofchargecarriersareincreased,whileacconductivity(σac)anddielectric constantdecreasedinCu/SnO2andFe/SnO2.Thevalueofσacwasdecreasedwhiletheelectric Q-factorwasincreasedbyincreasingT.SnO2obeyedthehole-conductionmechanismfor400 T(K) 300,whileCu/SnO2andFe/SnO2obeyedtheelectronic-conductionmechanismfor400 T (K)>300.Thebindingenergyisindependentof TforSnO2,whereasitincreaseswithrisingTfor Cu/SnO2andFe/SnO2composites.F-factorandelectronicpolarizabilityareimprovedbyariseof T for SnO2andCu/SnO2meanwhilearedecreasedforFe/SnO2.Theelectricalimpedanceofthegrains andtheirboundariesaswellasequivalentcapacitanceareincreasedbyincreasingTandhavehigher valuesforFe/SnO2atT>300K.TheobtainedresultsrecommendthesynthesizedCu/SnO2and Fe/SnO2compositestobeusedascatalystsforwaterpurification,anodesforlithiumbatteries, supercapacitors, andsolarcellapplicationsamongstothers.
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Research Abstract
Research Date
Research Journal
Physica Scripta
Research Member
Research Pages
125929
Research Publisher
IOPPublishingLtd
Research Rank
Q2
Research Vol
98
Research Website
https://doi.org/10.1088/1402-4896/ad081a
Research Year
2023
آخر الأبحاث
8 May 2020 / Accepted: 29 March 2021
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