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Production of granulated-copper oxide nanoparticles for catalytic application

Hosseinpour, M ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1557/jmr.2010.0262
  3. Publisher: 2010
  4. Abstract:
  5. Ultra fine CuO nanoparticles In the range of 2 ± 0.2 nm were synthesized by the supercritical hiydrotliermal method in a batch reactor. Itwas demonstrated that elevating the pH of the Cu2+ precursor solution to around 6 (neutral condition) not only does not lead to excessive agglomeration of the particles, but also reduces particle size and in general promotes their nanoscale characteristics. Prepared nanoparticles were immobilized in the biopolymcric matrix of barium alginate and calcined at different temperatures resulting in micro spherical granules of high porosity and elevated mechanical strength. The fabricated samples were characterized using x-ray diffractometry (XRD), transmission and scanning electron microscopy (TEM and SEM), nitrogen adsorption analysis (BET), mechanical testing,and temperature programmed reduction (TPR). It was found that topochemical models based on a nucleation growth mechanism fail in proper fitting of theTPR data. Instead, a generalized Sestak model in which different physicochemical mechanisms such as the mass action law are taken Into account gives asatisfactory regression of the kinetics behavior
  6. Keywords:
  7. Catalytic applications ; Copper oxide nanoparticles ; CuO nanoparticles ; High porosity ; Mass action law ; Matrix ; Mechanical strength ; Nano scale ; Neutral conditions ; Nitrogen adsorption ; Nucleation-growth mechanisms ; Physico-chemical mechanisms ; Precursor solutions ; SEM ; Super-critical ; TEM ; Temperature-programmed reduction ; Topochemical ; Ultra-fines ; X-ray diffractometry ; Agglomeration ; Barium ; Batch reactors ; Calcination ; Copper oxides ; Gas adsorption ; Mechanical testing ; Nanoparticles ; Scanning electron microscopy ; X ray diffraction analysis
  8. Source: Journal of Materials Research ; Volume 25, Issue 10 , 2010 , Pages 2025-2034 ; 08842914 (ISSN)
  9. URL: https://www.cambridge.org/core/journals/journal-of-materials-research/article/div-classtitleproduction-of-granulated-copper-oxide-nanoparticles-for-catalytic-applicationdiv/BA7362E2AC465168C57D766E644EEAEA