Effect of chromium addition to the Co-MCM-41 catalyst in the synthesis of single wall carbon nanotubes
In this paper, we study the effect of chromium addition to the Co-MCM-41 catalyst in the synthesis of single wall carbon nanotubes (SWNT). The molecular ratios between the two metals were varied in the catalyst template and its effect on the synthesized SWNT distribution was studied compared to the...
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| Veröffentlicht in: | Applied catalysis. A, General General, 2009-10, Vol.368 (1), p.40-49 |
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| creator | Zoican Loebick, Codruta Derrouiche, Salim Fang, Fang Li, Nan Haller, Gary L. Pfefferle, Lisa D. |
| description | In this paper, we study the effect of chromium addition to the Co-MCM-41 catalyst in the synthesis of single wall carbon nanotubes (SWNT). The molecular ratios between the two metals were varied in the catalyst template and its effect on the synthesized SWNT distribution was studied compared to the monometallic Co-MCM-41 catalyst.
This paper studies the effect of chromium addition to the Co-MCM-41 catalyst in the synthesis of single wall carbon nanotubes (SWNT). The molecular ratios between the two metals have been varied in the catalyst template and their effect on the synthesized SWNT distribution has been studied. By adding Cr to the Co-MCM-41 monometallic catalyst, the diameter distribution of the synthesized SWNT has shifted towards smaller diameter tubes. This shift was correlated with the development of a bimetallic oxide in the MCM-41 framework during catalyst synthesis. By use of fluorescence spectroscopy, the relative abundance of certain tube chiralities has been seen to increase in the bimetallic samples compared to the monometallic ones as for example the (6,5) nanotube.
X-ray absorption analysis of the catalyst before, during and after the SWNT synthesis, suggested that the use of a less reducible oxide (chromium oxide) to anchor clusters of a nanotube growth catalyst (cobalt clusters) is an important general tool for engineering the resultant nanotube properties. The addition of chromium has been seen to affect both the reducibility of the cobalt ions and the size of the resultant particles during the SWNT synthesis process. |
| doi_str_mv | 10.1016/j.apcata.2009.08.004 |
| format | Article |
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This paper studies the effect of chromium addition to the Co-MCM-41 catalyst in the synthesis of single wall carbon nanotubes (SWNT). The molecular ratios between the two metals have been varied in the catalyst template and their effect on the synthesized SWNT distribution has been studied. By adding Cr to the Co-MCM-41 monometallic catalyst, the diameter distribution of the synthesized SWNT has shifted towards smaller diameter tubes. This shift was correlated with the development of a bimetallic oxide in the MCM-41 framework during catalyst synthesis. By use of fluorescence spectroscopy, the relative abundance of certain tube chiralities has been seen to increase in the bimetallic samples compared to the monometallic ones as for example the (6,5) nanotube.
X-ray absorption analysis of the catalyst before, during and after the SWNT synthesis, suggested that the use of a less reducible oxide (chromium oxide) to anchor clusters of a nanotube growth catalyst (cobalt clusters) is an important general tool for engineering the resultant nanotube properties. The addition of chromium has been seen to affect both the reducibility of the cobalt ions and the size of the resultant particles during the SWNT synthesis process.</description><identifier>ISSN: 0926-860X</identifier><identifier>EISSN: 1873-3875</identifier><identifier>DOI: 10.1016/j.apcata.2009.08.004</identifier><language>eng</language><publisher>Kidlington: Elsevier B.V</publisher><subject>ABSORPTION ; ABUNDANCE ; Bimetallic ; CARBON ; Carbon nanotubes ; Catalysis ; Catalyst ; CATALYSTS ; Chemistry ; CHROMIUM ; CHROMIUM ADDITIONS ; COBALT ; COBALT IONS ; Colloidal state and disperse state ; Diameter ; DISTRIBUTION ; Exact sciences and technology ; FLUORESCENCE SPECTROSCOPY ; General and physical chemistry ; MATERIALS SCIENCE ; NANOTUBES ; national synchrotron light source ; OXIDES ; Porous materials ; Selectivity ; SYNTHESIS ; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><ispartof>Applied catalysis. A, General, 2009-10, Vol.368 (1), p.40-49</ispartof><rights>2009 Elsevier B.V.</rights><rights>2009 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c496t-e95615564f5e6eaa3a5989c4fbf4ff6ec28bc75f322d06195d9cb5a49e91992e3</citedby><cites>FETCH-LOGICAL-c496t-e95615564f5e6eaa3a5989c4fbf4ff6ec28bc75f322d06195d9cb5a49e91992e3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.apcata.2009.08.004$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,780,784,885,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=22076180$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/980165$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Zoican Loebick, Codruta</creatorcontrib><creatorcontrib>Derrouiche, Salim</creatorcontrib><creatorcontrib>Fang, Fang</creatorcontrib><creatorcontrib>Li, Nan</creatorcontrib><creatorcontrib>Haller, Gary L.</creatorcontrib><creatorcontrib>Pfefferle, Lisa D.</creatorcontrib><creatorcontrib>Brookhaven National Laboratory (BNL) National Synchrotron Light Source</creatorcontrib><title>Effect of chromium addition to the Co-MCM-41 catalyst in the synthesis of single wall carbon nanotubes</title><title>Applied catalysis. A, General</title><description>In this paper, we study the effect of chromium addition to the Co-MCM-41 catalyst in the synthesis of single wall carbon nanotubes (SWNT). The molecular ratios between the two metals were varied in the catalyst template and its effect on the synthesized SWNT distribution was studied compared to the monometallic Co-MCM-41 catalyst.
This paper studies the effect of chromium addition to the Co-MCM-41 catalyst in the synthesis of single wall carbon nanotubes (SWNT). The molecular ratios between the two metals have been varied in the catalyst template and their effect on the synthesized SWNT distribution has been studied. By adding Cr to the Co-MCM-41 monometallic catalyst, the diameter distribution of the synthesized SWNT has shifted towards smaller diameter tubes. This shift was correlated with the development of a bimetallic oxide in the MCM-41 framework during catalyst synthesis. By use of fluorescence spectroscopy, the relative abundance of certain tube chiralities has been seen to increase in the bimetallic samples compared to the monometallic ones as for example the (6,5) nanotube.
X-ray absorption analysis of the catalyst before, during and after the SWNT synthesis, suggested that the use of a less reducible oxide (chromium oxide) to anchor clusters of a nanotube growth catalyst (cobalt clusters) is an important general tool for engineering the resultant nanotube properties. The addition of chromium has been seen to affect both the reducibility of the cobalt ions and the size of the resultant particles during the SWNT synthesis process.</description><subject>ABSORPTION</subject><subject>ABUNDANCE</subject><subject>Bimetallic</subject><subject>CARBON</subject><subject>Carbon nanotubes</subject><subject>Catalysis</subject><subject>Catalyst</subject><subject>CATALYSTS</subject><subject>Chemistry</subject><subject>CHROMIUM</subject><subject>CHROMIUM ADDITIONS</subject><subject>COBALT</subject><subject>COBALT IONS</subject><subject>Colloidal state and disperse state</subject><subject>Diameter</subject><subject>DISTRIBUTION</subject><subject>Exact sciences and technology</subject><subject>FLUORESCENCE SPECTROSCOPY</subject><subject>General and physical chemistry</subject><subject>MATERIALS SCIENCE</subject><subject>NANOTUBES</subject><subject>national synchrotron light source</subject><subject>OXIDES</subject><subject>Porous materials</subject><subject>Selectivity</subject><subject>SYNTHESIS</subject><subject>Theory of reactions, general kinetics. 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A, General</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zoican Loebick, Codruta</au><au>Derrouiche, Salim</au><au>Fang, Fang</au><au>Li, Nan</au><au>Haller, Gary L.</au><au>Pfefferle, Lisa D.</au><aucorp>Brookhaven National Laboratory (BNL) National Synchrotron Light Source</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of chromium addition to the Co-MCM-41 catalyst in the synthesis of single wall carbon nanotubes</atitle><jtitle>Applied catalysis. A, General</jtitle><date>2009-10-31</date><risdate>2009</risdate><volume>368</volume><issue>1</issue><spage>40</spage><epage>49</epage><pages>40-49</pages><issn>0926-860X</issn><eissn>1873-3875</eissn><abstract>In this paper, we study the effect of chromium addition to the Co-MCM-41 catalyst in the synthesis of single wall carbon nanotubes (SWNT). The molecular ratios between the two metals were varied in the catalyst template and its effect on the synthesized SWNT distribution was studied compared to the monometallic Co-MCM-41 catalyst.
This paper studies the effect of chromium addition to the Co-MCM-41 catalyst in the synthesis of single wall carbon nanotubes (SWNT). The molecular ratios between the two metals have been varied in the catalyst template and their effect on the synthesized SWNT distribution has been studied. By adding Cr to the Co-MCM-41 monometallic catalyst, the diameter distribution of the synthesized SWNT has shifted towards smaller diameter tubes. This shift was correlated with the development of a bimetallic oxide in the MCM-41 framework during catalyst synthesis. By use of fluorescence spectroscopy, the relative abundance of certain tube chiralities has been seen to increase in the bimetallic samples compared to the monometallic ones as for example the (6,5) nanotube.
X-ray absorption analysis of the catalyst before, during and after the SWNT synthesis, suggested that the use of a less reducible oxide (chromium oxide) to anchor clusters of a nanotube growth catalyst (cobalt clusters) is an important general tool for engineering the resultant nanotube properties. The addition of chromium has been seen to affect both the reducibility of the cobalt ions and the size of the resultant particles during the SWNT synthesis process.</abstract><cop>Kidlington</cop><pub>Elsevier B.V</pub><doi>10.1016/j.apcata.2009.08.004</doi><tpages>10</tpages></addata></record> |
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| ispartof | Applied catalysis. A, General, 2009-10, Vol.368 (1), p.40-49 |
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| subjects | ABSORPTION ABUNDANCE Bimetallic CARBON Carbon nanotubes Catalysis Catalyst CATALYSTS Chemistry CHROMIUM CHROMIUM ADDITIONS COBALT COBALT IONS Colloidal state and disperse state Diameter DISTRIBUTION Exact sciences and technology FLUORESCENCE SPECTROSCOPY General and physical chemistry MATERIALS SCIENCE NANOTUBES national synchrotron light source OXIDES Porous materials Selectivity SYNTHESIS Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry |
| title | Effect of chromium addition to the Co-MCM-41 catalyst in the synthesis of single wall carbon nanotubes |
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