• Home
  • Browse
    • Current Issue
    • By Issue
    • By Author
    • By Subject
    • Author Index
    • Keyword Index
  • Journal Info
    • About Journal
    • Aims and Scope
    • Editorial Board
    • Editorial Staff
    • Publication Ethics
    • Indexing and Abstracting
    • Related Links
    • FAQ
    • Peer Review Process
    • News
  • Guide for Authors
  • Submit Manuscript
  • Reviewers
  • Contact Us
 
  • Login
  • Register
Home Articles List Article Information
  • Save Records
  • |
  • Printable Version
  • |
  • Recommend
  • |
  • How to cite Export to
    RIS EndNote BibTeX APA MLA Harvard Vancouver
  • |
  • Share Share
    CiteULike Mendeley Facebook Google LinkedIn Twitter
Journal of Nanoanalysis
arrow Articles in Press
arrow Current Issue
Journal Archive
Volume Volume 6 (2019)
Volume Volume 5 (2018)
Volume Volume 4 (2017)
Volume Volume 3 (2016)
Volume Volume 2 (2015)
Volume Volume 1 (2014)
khademinia, S., behzad, M. (2018). Low temperature hydrothermal synthesis, evaluation of band gap energies and catalytic performance for Biginelli reactions of Sr2-xAxNb2O7+δ (A=Eu3+ and Nd3+) (x = 0.01 and 0.05) nanomaterials. Journal of Nanoanalysis, (), -. doi: 10.22034/jna.2018.557281.1062
shahin khademinia; mahdi behzad. "Low temperature hydrothermal synthesis, evaluation of band gap energies and catalytic performance for Biginelli reactions of Sr2-xAxNb2O7+δ (A=Eu3+ and Nd3+) (x = 0.01 and 0.05) nanomaterials". Journal of Nanoanalysis, , , 2018, -. doi: 10.22034/jna.2018.557281.1062
khademinia, S., behzad, M. (2018). 'Low temperature hydrothermal synthesis, evaluation of band gap energies and catalytic performance for Biginelli reactions of Sr2-xAxNb2O7+δ (A=Eu3+ and Nd3+) (x = 0.01 and 0.05) nanomaterials', Journal of Nanoanalysis, (), pp. -. doi: 10.22034/jna.2018.557281.1062
khademinia, S., behzad, M. Low temperature hydrothermal synthesis, evaluation of band gap energies and catalytic performance for Biginelli reactions of Sr2-xAxNb2O7+δ (A=Eu3+ and Nd3+) (x = 0.01 and 0.05) nanomaterials. Journal of Nanoanalysis, 2018; (): -. doi: 10.22034/jna.2018.557281.1062

Low temperature hydrothermal synthesis, evaluation of band gap energies and catalytic performance for Biginelli reactions of Sr2-xAxNb2O7+δ (A=Eu3+ and Nd3+) (x = 0.01 and 0.05) nanomaterials

Articles in Press, Accepted Manuscript , Available Online from 01 March 2018  XML
Document Type: Original Research Paper
DOI: 10.22034/jna.2018.557281.1062
Authors
shahin khademinia email orcid ; mahdi behzad
Department of Inorganic Chemistry, Faculty of Chemistry, Semnan University, Semnan 35351-19111, Iran
Abstract
Nano powders Eu3+ and Nd3+ - doped Sr2Nb2O7 were prepared by a low temperature hydrothermal method at 120 ºC for 48 h followed by annealing at 400 ᵒC for 3 h among Sr(NO3)2 and Nb2O5, Eu2O3 and Nd2O3 raw materials at stoichiometric 1:1 Sr:Nb molar ratio. Characterization of the synthesized materials was performed by X-ray powder diffraction (XRPD) technique. FullProf program employing profile matching with constant scale factors was employed for structural analysis. The results showed that the patterns had a main Sr2Nb2O7 orthorhombic crystal structure with space group Cmc21. FESEM images showed that the synthesized nanomaterials had flower morphologies. Ultraviolet-visible spectra analysis showed that the synthesized Eu3+ and Nd3+ - doped Sr2Nb2O7 nanomaterials had light absorption in the ultraviolet light region. The direct optical band gap energies obtained from UV-Vis absorption spectra were 3.45, 3.50 and 3.80 eV for pure Sr2Nb2O7, S2 and S4, respectively. The catalytic activity of the obtained materials in the one-pot synthesis of the heterocyclic compounds 3,4-dihydropyrimidin-2(1H)-ones (DHPMs) in Biginelli reaction is investigated. The optimized 0.03 g of the catalyst, 95 ºC reaction temperature, and 60 min reaction time are used for the other Biginelli reactions in this work.
Keywords
Sr2Nb2O7; Rietveld; Hydrothermal; Crystal Structure; Biginelli
Statistics
Article View: 176
Home | Glossary | News | Aims and Scope | Sitemap
Top Top

Creative Commons

All available content on Journal of Nanoanalysis (JNA) are licensed under the Creative Commons Attribution 4.0 International (CC-BY 4.0) License.

web server statistics Real Time Web Analytics Clicky

Journal Management System. Designed by sinaweb.