Structural characterization and optical properties of perovskite ZnZrO 3 nanoparticles

Handle URI:
http://hdl.handle.net/10754/563445
Title:
Structural characterization and optical properties of perovskite ZnZrO 3 nanoparticles
Authors:
Zhu, Xinhua; Zhou, Jun; Zhu, Jianmin; Liu, Zhiguo; Li, Yangyang; Al-Kassab, Talaat
Abstract:
Perovskite ZnZrO3 nanoparticles were synthesized by hydrothermal method, and their microstructures and optical properties were characterized. The crystallinity, phase formation, morphology and composition of the as-synthesized nanoparticles were characterized by X-ray diffraction (XRD), selected area electron diffraction (SAED), high-resolutiontransmission electron microscopy (HRTEM), and energy-dispersive X-ray (EDX) spectroscopy analysis, respectively. TEM images demonstrated that the average particle size of the ZnZrO3 powders was increased with increasing the Zn/Zr molar ratios in the precursors, and more large ZnZrO3 particles with cubic morphology were observed at high Zn/Zr molar ratios. In addition, the phase structures of the ZnZrO3 particles were also evolved from a cubic to tetragonal perovskite phase, as revealed by XRD and SAED patterns. HRTEM images demonstrate that surface structures of the ZnZrO3 powders synthesized at high Zn/Zr molar ratios, are composed of corners bound by the {100} mini-facets, and the surface steps lying on the {100} planes are frequently observed, whereas the (101) facet isoccasionally observed. The formation of such a rough surface structure is understood from the periodic bond chain theory. Quantitative EDX analyses demonstrated that the atomic concentrations (at.%) of Zn:Zr:O in the particles were 20.70:21.07:58.23, as close to the composition of ZnZrO3. In the optical spectra, a significant red shift of the absorption edges (for the ZnZrO3 nanopowders) from UV to visible region (from 394 to 417 nm) was observed as increasing the Zn/Zr molar ratios in the precursors, which corresponds to that the band gap energies of the ZnZrO3 nanopowders can be continuously tuned from 3.15 to 2.97 eV. This opens an easy way to tune the band gap energies of the ZnZrO3 nanopowders. © 2014 The American Ceramic Society.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program
Publisher:
Wiley-Blackwell
Journal:
Journal of the American Ceramic Society
Issue Date:
17-Mar-2014
DOI:
10.1111/jace.12883
Type:
Article
ISSN:
00027820
Sponsors:
This work is supported by National Natural Science Foundation of China (grant nos. 11174122 and 11134004), State Key Program for Basic Research of China (grant nos. 2009CB929503 and 2012CB619400), and open project from National Laboratory of Solid State Microstructures, Nanjing University. T. Al-Kassab acknowledges the generous support of the KAUST baseline funds.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorZhu, Xinhuaen
dc.contributor.authorZhou, Junen
dc.contributor.authorZhu, Jianminen
dc.contributor.authorLiu, Zhiguoen
dc.contributor.authorLi, Yangyangen
dc.contributor.authorAl-Kassab, Talaaten
dc.date.accessioned2015-08-03T11:51:40Zen
dc.date.available2015-08-03T11:51:40Zen
dc.date.issued2014-03-17en
dc.identifier.issn00027820en
dc.identifier.doi10.1111/jace.12883en
dc.identifier.urihttp://hdl.handle.net/10754/563445en
dc.description.abstractPerovskite ZnZrO3 nanoparticles were synthesized by hydrothermal method, and their microstructures and optical properties were characterized. The crystallinity, phase formation, morphology and composition of the as-synthesized nanoparticles were characterized by X-ray diffraction (XRD), selected area electron diffraction (SAED), high-resolutiontransmission electron microscopy (HRTEM), and energy-dispersive X-ray (EDX) spectroscopy analysis, respectively. TEM images demonstrated that the average particle size of the ZnZrO3 powders was increased with increasing the Zn/Zr molar ratios in the precursors, and more large ZnZrO3 particles with cubic morphology were observed at high Zn/Zr molar ratios. In addition, the phase structures of the ZnZrO3 particles were also evolved from a cubic to tetragonal perovskite phase, as revealed by XRD and SAED patterns. HRTEM images demonstrate that surface structures of the ZnZrO3 powders synthesized at high Zn/Zr molar ratios, are composed of corners bound by the {100} mini-facets, and the surface steps lying on the {100} planes are frequently observed, whereas the (101) facet isoccasionally observed. The formation of such a rough surface structure is understood from the periodic bond chain theory. Quantitative EDX analyses demonstrated that the atomic concentrations (at.%) of Zn:Zr:O in the particles were 20.70:21.07:58.23, as close to the composition of ZnZrO3. In the optical spectra, a significant red shift of the absorption edges (for the ZnZrO3 nanopowders) from UV to visible region (from 394 to 417 nm) was observed as increasing the Zn/Zr molar ratios in the precursors, which corresponds to that the band gap energies of the ZnZrO3 nanopowders can be continuously tuned from 3.15 to 2.97 eV. This opens an easy way to tune the band gap energies of the ZnZrO3 nanopowders. © 2014 The American Ceramic Society.en
dc.description.sponsorshipThis work is supported by National Natural Science Foundation of China (grant nos. 11174122 and 11134004), State Key Program for Basic Research of China (grant nos. 2009CB929503 and 2012CB619400), and open project from National Laboratory of Solid State Microstructures, Nanjing University. T. Al-Kassab acknowledges the generous support of the KAUST baseline funds.en
dc.publisherWiley-Blackwellen
dc.titleStructural characterization and optical properties of perovskite ZnZrO 3 nanoparticlesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.identifier.journalJournal of the American Ceramic Societyen
dc.contributor.institutionNational Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, Chinaen
dc.contributor.institutionNational Laboratory of Solid State Microstructures, Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, Chinaen
kaust.authorAl-Kassab, Talaaten
kaust.authorLi, Yangyangen
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