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الرئيسية > Double-Consciousness:>الوصف

Double-Consciousness: Gazing at the Arab World from the American Soilii Europium Doped Titanium Dioxide Nanocrystalline : Synthesis, Structure and Optical Properties

المصدر: مجلة جامعة البيضاء
الناشر: جامعة البيضاء
المؤلف الرئيسي: Adriss, Ibrahim Adam Sulieman (Author)
مؤلفين آخرين: Shaban, F. (Co-Author), Yagoub, M. Y. A. (Co-Author), Hassan, Hassan Wardi (Co-Author), Issa, Nashwa A. (Co-Author)
المجلد/العدد: مج5, ع1
محكمة: نعم
الدولة: اليمن
التاريخ الميلادي: 2023
الشهر: أبريل
الصفحات: 192 - 205
ISSN: 2709-9695
رقم MD: 1408306
نوع المحتوى: بحوث ومقالات
اللغة: الإنجليزية
قواعد المعلومات: EduSearch, HumanIndex
مواضيع:
النباتات المخدرة | الوعي المزدوج | ثاني أكسيد التيتانيوم
كلمات المؤلف المفتاحية:
Titanium Dioxide | Photoluminescence Spectroscopy | XPS | Nanocrystalline | Anatase | Rutile
رابط المحتوى:
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المستخلص: Uniform, spherical-shaped TiO2: Eu nanoparticles with different doping concentrations were synthesized using the sol-gel method. The structural, morphology, optical, luminescent, and surface properties of the samples were investigated at different Eu3+ concentration. The morphology, crystalline structure, and chemical composition of the samples were characterized by scanning electron microscopy, X ray diffraction, and X-ray photoelectron spectroscopy. The X-ray diffraction results reveal that the obtained powder nanoparticles consist of a single phase tetragonal structure. The crystallite sizes calculated by utilizing Scherrer’s equation were found in the range of 18.94 – 7.77 nm for TiO2: Eu samples annealed at 550˚C. The SEM images reveal an irregular agglomerated morphology indicating a decrease in particle size with an increase in Eu3+ concentration. X-ray photoelectron spectroscopy (XPS) high resolution spectra of the Ti-2p peak confirmed that Ti atoms were in a doubly ionized state, and the deconvolution of the O1s XPS peak show the presence of oxygen related defects in the sample. EDS results confirm a systematic increase of Eu content in the as-prepared samples with the increase of europium concentration. Incorporation of europium in the titania particles induces a structural deformation and a blueshift of their absorption edge. The luminescence intensity increases with Eu3+ concentration up to 3 mol% and then quenched. While the PL emission of the as-grown samples is dominated by the 5D0- 7Fj transition of Eu3+ ions, the emission intensity reduces drastically after thermal annealing due to outwards segregation of dopant ions.
ISSN: 2709-9695

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