Volume 3, Issue 4 (2020)
IQBQ 2020, 3(4): 3-12 |
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golmohammadi M, Nasiri H. Synthesis and Characterization of CexZr1-xO2 using Supercritical Water. IQBQ 2020; 3 (4) :3-12
URL: http://arcpe.modares.ac.ir/article-38-36751-en.html
URL: http://arcpe.modares.ac.ir/article-38-36751-en.html
1- Department of Chemical Engineering, Birjand University of Technology , golmohammadi@birjandut.ac.ir
2- Department of Materials Engineering, Birjand University of Technology, Birjand, Iran
2- Department of Materials Engineering, Birjand University of Technology, Birjand, Iran
Abstract: (4266 Views)
Research subject: Due to the public's attention on the environmental issues as well as strict environmental regulations, the eco-friendly methods for nanoparticles have received considerable attention in the recent years.
Research approach: In the present study, a mixed oxide nanoparticles containing cerium and zirconium (Cex-Zr1-xO2) was fabricated the in supercritical water (SCW) medium. The synthesized nanoparticles were characterized by various analyses, including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM).
Main results: The results of the analyses demonstrated that fine nanoparticles with mean size of 13±3 nm, with high crystallinity, and with appropriate size distribution and surface area were synthesized by SCW. Moreover, an oxygen storage capacity (OSC) as high as 1.25 mmol O2/g was estimated for Cex-Zr1-xO2 nanoparticles through temperature programmed reduction in hydrogen (H2-TPR). According to the obtained results, the Cex-Zr1-xO2 nanoparticles could be a suitable candidate for catalysts of oxidation processes as well as three-way catalyst for control of automotive exhaust gases.
Research approach: In the present study, a mixed oxide nanoparticles containing cerium and zirconium (Cex-Zr1-xO2) was fabricated the in supercritical water (SCW) medium. The synthesized nanoparticles were characterized by various analyses, including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM).
Main results: The results of the analyses demonstrated that fine nanoparticles with mean size of 13±3 nm, with high crystallinity, and with appropriate size distribution and surface area were synthesized by SCW. Moreover, an oxygen storage capacity (OSC) as high as 1.25 mmol O2/g was estimated for Cex-Zr1-xO2 nanoparticles through temperature programmed reduction in hydrogen (H2-TPR). According to the obtained results, the Cex-Zr1-xO2 nanoparticles could be a suitable candidate for catalysts of oxidation processes as well as three-way catalyst for control of automotive exhaust gases.
Article Type: Original Research |
Subject:
nano-catalyst
Received: 2019/09/24 | Accepted: 2020/03/22 | Published: 2020/03/22
Received: 2019/09/24 | Accepted: 2020/03/22 | Published: 2020/03/22
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