Architectural Processes and Physicochemical Properties of CoO/ZnO and Zn 1− x Co x O/Co 1− y Zn y O Nanocomposites

Handle URI:
http://hdl.handle.net/10754/597606
Title:
Architectural Processes and Physicochemical Properties of CoO/ZnO and Zn 1− x Co x O/Co 1− y Zn y O Nanocomposites
Authors:
Yao, Ke Xin; Zeng, Hua Chun
Abstract:
In this work we synthesized two inverse kinds of cobalt and zinc oxide nanocomposites (CoO/ZnO and Zn1-xCoxO/Co 1-yZnyO) and compared methodologistic features observed from the syntheses. The binary oxide system chosen herein is because divalent cobalt and zinc have very similar ion radii, and they interdiffuse easily when forming doped structures. A "two-pot" process was devised for the CoO/ZnO composites, in which mesocrystalline cores of CoO were formed first, followed by introduction of an overlayer of ZnO nanoparticles to the core surfaces. In contrast, a "one-pot" process was developed for the Zn1-xCoxO/Co1-yZnyO composites. In particular, hollow and/or multishelled Zn1-xCoxO cores (in wurtzite phase) serve as a support for the nanospheres of Co 1-yZnyO (in rock-salt phase) in this latter method. Our findings indicate that while "multi-pot" synthesis is a prevailing methodology for composite nanoparticles, simpler "one-pot" synthesis can be an effective approach for preparation of more complex nanocomposite materials, especially for interdoped metal oxides. As an example, our as-prepared binary oxide composites Zn1-xCoxO/Co 1-yZnyO have shown good catalytic activity for oxidation of carbon monoxide at relatively low reaction temperatures. © 2009 American Chemical Society.
Citation:
Yao KX, Zeng HC (2009) Architectural Processes and Physicochemical Properties of CoO/ZnO and Zn 1− x Co x O/Co 1− y Zn y O Nanocomposites . The Journal of Physical Chemistry C 113: 1373–1385. Available: http://dx.doi.org/10.1021/jp8093325.
Publisher:
American Chemical Society (ACS)
Journal:
The Journal of Physical Chemistry C
Issue Date:
29-Jan-2009
DOI:
10.1021/jp8093325
Type:
Article
ISSN:
1932-7447; 1932-7455
Sponsors:
The authors gratefully acknowledge the financial supports of the Ministry of Education, Singapore, and the King Abdullah University of Science and Technology, Saudi Arabia.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorYao, Ke Xinen
dc.contributor.authorZeng, Hua Chunen
dc.date.accessioned2016-02-25T12:42:56Zen
dc.date.available2016-02-25T12:42:56Zen
dc.date.issued2009-01-29en
dc.identifier.citationYao KX, Zeng HC (2009) Architectural Processes and Physicochemical Properties of CoO/ZnO and Zn 1− x Co x O/Co 1− y Zn y O Nanocomposites . The Journal of Physical Chemistry C 113: 1373–1385. Available: http://dx.doi.org/10.1021/jp8093325.en
dc.identifier.issn1932-7447en
dc.identifier.issn1932-7455en
dc.identifier.doi10.1021/jp8093325en
dc.identifier.urihttp://hdl.handle.net/10754/597606en
dc.description.abstractIn this work we synthesized two inverse kinds of cobalt and zinc oxide nanocomposites (CoO/ZnO and Zn1-xCoxO/Co 1-yZnyO) and compared methodologistic features observed from the syntheses. The binary oxide system chosen herein is because divalent cobalt and zinc have very similar ion radii, and they interdiffuse easily when forming doped structures. A "two-pot" process was devised for the CoO/ZnO composites, in which mesocrystalline cores of CoO were formed first, followed by introduction of an overlayer of ZnO nanoparticles to the core surfaces. In contrast, a "one-pot" process was developed for the Zn1-xCoxO/Co1-yZnyO composites. In particular, hollow and/or multishelled Zn1-xCoxO cores (in wurtzite phase) serve as a support for the nanospheres of Co 1-yZnyO (in rock-salt phase) in this latter method. Our findings indicate that while "multi-pot" synthesis is a prevailing methodology for composite nanoparticles, simpler "one-pot" synthesis can be an effective approach for preparation of more complex nanocomposite materials, especially for interdoped metal oxides. As an example, our as-prepared binary oxide composites Zn1-xCoxO/Co 1-yZnyO have shown good catalytic activity for oxidation of carbon monoxide at relatively low reaction temperatures. © 2009 American Chemical Society.en
dc.description.sponsorshipThe authors gratefully acknowledge the financial supports of the Ministry of Education, Singapore, and the King Abdullah University of Science and Technology, Saudi Arabia.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleArchitectural Processes and Physicochemical Properties of CoO/ZnO and Zn 1− x Co x O/Co 1− y Zn y O Nanocompositesen
dc.typeArticleen
dc.identifier.journalThe Journal of Physical Chemistry Cen
dc.contributor.institutionNational University of Singapore, Singapore City, Singaporeen
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