دورية أكاديمية
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Hydrothermal Synthesis and Properties of Nanostructured Silica Containing Lanthanide Type Ln-SiO 2 (Ln = La, Ce, Pr, Nd, Eu, Gd, Dy, Yb, Lu).

التفاصيل البيبلوغرافية
العنوان: Hydrothermal Synthesis and Properties of Nanostructured Silica Containing Lanthanide Type Ln-SiO 2 (Ln = La, Ce, Pr, Nd, Eu, Gd, Dy, Yb, Lu).
المؤلفون: Barros JMF; Center of Education and Health, Academic Unit of Biology and Chemistry, Federal University of Campina Grande, Cuite 58175-000, PB, Brazil., Fernandes GJT; Laboratory of Catalysis and Petrochemistry, Institute of Chemistry, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil., Araujo MDS; Laboratory of Catalysis and Petrochemistry, Institute of Chemistry, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil., Melo DMA; Institute of Chemistry, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil., Gondim AD; Laboratory of Catalysis and Petrochemistry, Institute of Chemistry, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil., Fernandes VJ Jr; Laboratory of Fuels and Lubricants, Institute of Chemistry, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil., Araujo AS; Laboratory of Catalysis and Petrochemistry, Institute of Chemistry, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil.
المصدر: Nanomaterials (Basel, Switzerland) [Nanomaterials (Basel)] 2023 Jan 18; Vol. 13 (3). Date of Electronic Publication: 2023 Jan 18.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: MDPI AG Country of Publication: Switzerland NLM ID: 101610216 Publication Model: Electronic Cited Medium: Print ISSN: 2079-4991 (Print) Linking ISSN: 20794991 NLM ISO Abbreviation: Nanomaterials (Basel) Subsets: PubMed not MEDLINE
أسماء مطبوعة: Original Publication: Basel, Switzerland : MDPI AG, [2011]-
مستخلص: The nanostructured lanthanide-silica materials of the Ln-SiO 2 type (Ln = La, Ce, Pr, Nd, Eu, Gd, Dy, Yb, Lu) were synthesized by the hydrothermal method at 100 °C, using cetyltrimethylammonium as a structural template, silica gel and sodium silicate as a source of silicon, and lanthanide oxides, with Si/Ln molar ratio = 50. The resulting materials were calcined at 500 °C using nitrogen and air, and characterized by X-ray diffraction (XRD), Fourier-Transform infrared absorption spectroscopy, scanning electron microscopy, thermogravimetry (TG), surface area by the BET method and acidity measurements by n-butylamine adsorption. The XRD and chemical analysis indicated that the SiO 2 presented a hexagonal structure and the incorporation of lanthanides in the structure changes the properties of the Ln-SiO 2 materials. The heavier the lanthanide element, the higher the Si/Ln ratio. The TG curves showed that the decomposition of the structural template occurs in the materials at temperatures below 500 °C. The samples showed variations in specific surface area, mean pore diameter and silica wall thickness, depending on the nature of the lanthanide. The incorporation of different lanthanides in the silica generated acid sites of varied strength. The hydrothermal stability of the Ln-SiO 2 materials evaluated at high temperatures, evidenced that the properties can be controlled for application in adsorption and catalysis processes.
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معلومات مُعتمدة: 306780/2018-6. National Council for Scientific and Technological Development
فهرسة مساهمة: Keywords: hydrothermal synthesis; lanthanides; nanostructured materials; silica
تواريخ الأحداث: Date Created: 20230211 Latest Revision: 20230214
رمز التحديث: 20230214
مُعرف محوري في PubMed: PMC9921768
DOI: 10.3390/nano13030382
PMID: 36770344
قاعدة البيانات: MEDLINE
الوصف
تدمد:2079-4991
DOI:10.3390/nano13030382