Electrochemical detection of 2,4,6-trinitrotoluene on carbon nanotube modified electrode: Effect of acid functionalization
This work presents new insights on the electrocatalytic reduction of 2,4,6-trinitrotoluene (TNT) on carbon nanotubes (CNTs)-modified electrodes (multi-walled carbon nanotubes and double-walled carbon nanotubes). Cyclic voltammetry showed at least 5-fold current increase in the electrochemical reduct...
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| Veröffentlicht in: | Journal of solid state electrochemistry 2020, Vol.24 (1), p.121-129 |
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| creator | Stefano, Jéssica S. Lima, Ana P. Nascentes, Clésia C. Krzyzaniak, Sindy R. Mello, Paola A. Gonçalves, Josué M. Richter, Eduardo M. Nossol, Edson Munoz, Rodrigo A. A. |
| description | This work presents new insights on the electrocatalytic reduction of 2,4,6-trinitrotoluene (TNT) on carbon nanotubes (CNTs)-modified electrodes (multi-walled carbon nanotubes and double-walled carbon nanotubes). Cyclic voltammetry showed at least 5-fold current increase in the electrochemical reduction of TNT on GCE modified with pristine (“as received”) CNTs. The improved performance was also verified after 60 s of accumulation and scanning using adsorptive stripping voltammetry, with slope values 20-fold higher. Acid functionalization removed residual metals from CNTs and reduced their surface area. Hence, the improved electrochemical response of TNT on pristine CNTs seems to be not only due to surface roughness (electroactive area) but mainly originating from residual metallic catalysts on CNTs. The modified electrode with pristine CNTs was applied for the determination of TNT residues on different surfaces contaminated with the explosive, showing its applicability for forensic investigations. |
| doi_str_mv | 10.1007/s10008-019-04465-5 |
| format | Article |
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Hence, the improved electrochemical response of TNT on pristine CNTs seems to be not only due to surface roughness (electroactive area) but mainly originating from residual metallic catalysts on CNTs. The modified electrode with pristine CNTs was applied for the determination of TNT residues on different surfaces contaminated with the explosive, showing its applicability for forensic investigations.</description><identifier>ISSN: 1432-8488</identifier><identifier>EISSN: 1433-0768</identifier><identifier>DOI: 10.1007/s10008-019-04465-5</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Adsorptivity ; Analytical Chemistry ; Carbon ; Characterization and Evaluation of Materials ; Chemical reduction ; Chemistry ; Chemistry and Materials Science ; Condensed Matter Physics ; Electrochemical analysis ; Electrochemistry ; Electrodes ; Electrons ; Energy Storage ; Multi wall carbon nanotubes ; Original Paper ; Physical Chemistry ; Surface roughness ; Trinitrotoluene ; Voltammetry</subject><ispartof>Journal of solid state electrochemistry, 2020, Vol.24 (1), p.121-129</ispartof><rights>Springer-Verlag GmbH Germany, part of Springer Nature 2019</rights><rights>2019© Springer-Verlag GmbH Germany, part of Springer Nature 2019</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c356t-79e13c3c4304bac63c4aabf8d591283b0b734787ed5d3608588043f976d902d53</citedby><cites>FETCH-LOGICAL-c356t-79e13c3c4304bac63c4aabf8d591283b0b734787ed5d3608588043f976d902d53</cites><orcidid>0000-0001-8230-5825</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10008-019-04465-5$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10008-019-04465-5$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27903,27904,41467,42536,51298</link.rule.ids></links><search><creatorcontrib>Stefano, Jéssica S.</creatorcontrib><creatorcontrib>Lima, Ana P.</creatorcontrib><creatorcontrib>Nascentes, Clésia C.</creatorcontrib><creatorcontrib>Krzyzaniak, Sindy R.</creatorcontrib><creatorcontrib>Mello, Paola A.</creatorcontrib><creatorcontrib>Gonçalves, Josué M.</creatorcontrib><creatorcontrib>Richter, Eduardo M.</creatorcontrib><creatorcontrib>Nossol, Edson</creatorcontrib><creatorcontrib>Munoz, Rodrigo A. A.</creatorcontrib><title>Electrochemical detection of 2,4,6-trinitrotoluene on carbon nanotube modified electrode: Effect of acid functionalization</title><title>Journal of solid state electrochemistry</title><addtitle>J Solid State Electrochem</addtitle><description>This work presents new insights on the electrocatalytic reduction of 2,4,6-trinitrotoluene (TNT) on carbon nanotubes (CNTs)-modified electrodes (multi-walled carbon nanotubes and double-walled carbon nanotubes). Cyclic voltammetry showed at least 5-fold current increase in the electrochemical reduction of TNT on GCE modified with pristine (“as received”) CNTs. The improved performance was also verified after 60 s of accumulation and scanning using adsorptive stripping voltammetry, with slope values 20-fold higher. Acid functionalization removed residual metals from CNTs and reduced their surface area. Hence, the improved electrochemical response of TNT on pristine CNTs seems to be not only due to surface roughness (electroactive area) but mainly originating from residual metallic catalysts on CNTs. The modified electrode with pristine CNTs was applied for the determination of TNT residues on different surfaces contaminated with the explosive, showing its applicability for forensic investigations.</description><subject>Adsorptivity</subject><subject>Analytical Chemistry</subject><subject>Carbon</subject><subject>Characterization and Evaluation of Materials</subject><subject>Chemical reduction</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Condensed Matter Physics</subject><subject>Electrochemical analysis</subject><subject>Electrochemistry</subject><subject>Electrodes</subject><subject>Electrons</subject><subject>Energy Storage</subject><subject>Multi wall carbon nanotubes</subject><subject>Original Paper</subject><subject>Physical Chemistry</subject><subject>Surface roughness</subject><subject>Trinitrotoluene</subject><subject>Voltammetry</subject><issn>1432-8488</issn><issn>1433-0768</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp9kEtLAzEYRYMoWKt_wNWA20bzmiTjTkp9QMGNrkMmD02ZTmoys7C_3rQjuHOT75Lc7xAOANcY3WKExF0uJ5IQ4QYixngN6xMww4xSiASXp8dMoGRSnoOLnDcIYcExmoH9qnNmSNF8um0wuqusG8pFiH0VfUUWbMHhkEIfSmeI3eh6V5U3o1NbRq_7OIytq7bRBh-crdyEs-6-Wnlf8gGjTbCVH_sjV3dhrw_hEpx53WV39Tvn4P1x9bZ8huvXp5flwxoaWvMBisZhaqhhFLFWG16S1q2Xtm4wkbRFraBMSOFsbSlHspYSMeobwW2DiK3pHNxM3F2KX6PLg9rEMZV_ZEVo0SIIKXbmgEwtk2LOyXm1S2Gr07fCSB0cq8mxKo7V0bE6oOm0lEu5_3DpD_3P1g_7Q3_K</recordid><startdate>2020</startdate><enddate>2020</enddate><creator>Stefano, Jéssica S.</creator><creator>Lima, Ana P.</creator><creator>Nascentes, Clésia C.</creator><creator>Krzyzaniak, Sindy R.</creator><creator>Mello, Paola A.</creator><creator>Gonçalves, Josué M.</creator><creator>Richter, Eduardo M.</creator><creator>Nossol, Edson</creator><creator>Munoz, Rodrigo A. A.</creator><general>Springer Berlin Heidelberg</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0001-8230-5825</orcidid></search><sort><creationdate>2020</creationdate><title>Electrochemical detection of 2,4,6-trinitrotoluene on carbon nanotube modified electrode: Effect of acid functionalization</title><author>Stefano, Jéssica S. ; Lima, Ana P. ; Nascentes, Clésia C. ; Krzyzaniak, Sindy R. ; Mello, Paola A. ; Gonçalves, Josué M. ; Richter, Eduardo M. ; Nossol, Edson ; Munoz, Rodrigo A. 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A.</creatorcontrib><collection>CrossRef</collection><jtitle>Journal of solid state electrochemistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Stefano, Jéssica S.</au><au>Lima, Ana P.</au><au>Nascentes, Clésia C.</au><au>Krzyzaniak, Sindy R.</au><au>Mello, Paola A.</au><au>Gonçalves, Josué M.</au><au>Richter, Eduardo M.</au><au>Nossol, Edson</au><au>Munoz, Rodrigo A. A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Electrochemical detection of 2,4,6-trinitrotoluene on carbon nanotube modified electrode: Effect of acid functionalization</atitle><jtitle>Journal of solid state electrochemistry</jtitle><stitle>J Solid State Electrochem</stitle><date>2020</date><risdate>2020</risdate><volume>24</volume><issue>1</issue><spage>121</spage><epage>129</epage><pages>121-129</pages><issn>1432-8488</issn><eissn>1433-0768</eissn><abstract>This work presents new insights on the electrocatalytic reduction of 2,4,6-trinitrotoluene (TNT) on carbon nanotubes (CNTs)-modified electrodes (multi-walled carbon nanotubes and double-walled carbon nanotubes). Cyclic voltammetry showed at least 5-fold current increase in the electrochemical reduction of TNT on GCE modified with pristine (“as received”) CNTs. The improved performance was also verified after 60 s of accumulation and scanning using adsorptive stripping voltammetry, with slope values 20-fold higher. Acid functionalization removed residual metals from CNTs and reduced their surface area. Hence, the improved electrochemical response of TNT on pristine CNTs seems to be not only due to surface roughness (electroactive area) but mainly originating from residual metallic catalysts on CNTs. The modified electrode with pristine CNTs was applied for the determination of TNT residues on different surfaces contaminated with the explosive, showing its applicability for forensic investigations.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1007/s10008-019-04465-5</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0001-8230-5825</orcidid></addata></record> |
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| subjects | Adsorptivity Analytical Chemistry Carbon Characterization and Evaluation of Materials Chemical reduction Chemistry Chemistry and Materials Science Condensed Matter Physics Electrochemical analysis Electrochemistry Electrodes Electrons Energy Storage Multi wall carbon nanotubes Original Paper Physical Chemistry Surface roughness Trinitrotoluene Voltammetry |
| title | Electrochemical detection of 2,4,6-trinitrotoluene on carbon nanotube modified electrode: Effect of acid functionalization |
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