Voltammetric Study of the Copper Pentacyanonitrosylferrate Adsorbed on the Silica Modified with a Poly(propylene)imine Hexadecylamine Dendrimer for Determination of Nitrite
Poly(propylene)imine hexadecylamine dendrimer (DAB-Am-16) was anchored on the surface of 3-chloropropylsilyl silica gel and subsequently interacted with copper nitroprusside. The composite was characterized by infrared (FTIR), energy dispersive X-ray (EDX), and cyclic voltammetry. The above techniqu...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | International Journal of Electrochemistry |
| Online Access: | http://dx.doi.org/10.1155/2012/527596 |
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| author | D. R. do Carmo S. Gabriel D. R. Silvestrini U. O. Bicalho L. R. Cumba |
| author_facet | D. R. do Carmo S. Gabriel D. R. Silvestrini U. O. Bicalho L. R. Cumba |
| author_sort | D. R. do Carmo |
| collection | DOAJ |
| description | Poly(propylene)imine hexadecylamine dendrimer (DAB-Am-16) was anchored on the surface of 3-chloropropylsilyl silica gel and subsequently interacted with copper nitroprusside. The composite was characterized by infrared (FTIR), energy dispersive X-ray (EDX), and cyclic voltammetry. The above techniques confirmed the successful anchoring of the dendrimer on the silica gel modified surface and its interaction with copper nitroprusside. The cyclic voltammogram of CuNPSD was found to exhibit two redox couples with (Eθ′)1 = 0.30 V and (Eθ′)2 = 0.78 V versus Ag/AgCl (KCl=1.0 mol L−1; 𝑣=20 mV s−1) attributed to the redox processes Cu(I)/Cu(II) and Fe(II)(CN)5NO/Fe(III)(CN)5NO, respectively. The CuNPSD-modified graphite paste electrode was found to show a linear response of 5.0×10−4 to 9.0×10−3 mol L−1 for nitrite determination with a detection limit (DL) of 3.8×10−4 mol L−1 and an amperometric sensitivity of 25.0 mA/mol L−1. The CuNPSD-modified graphite paste electrode was found to show a good electrochemical stability and an excellent response to the electrocatalytic oxidation of sodium nitrite. |
| format | Article |
| id | doaj-art-2f1c7586a78a4d8dba5fd600e10020a1 |
| institution | OA Journals |
| issn | 2090-3529 2090-3537 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Electrochemistry |
| spelling | doaj-art-2f1c7586a78a4d8dba5fd600e10020a12025-08-20T02:08:11ZengWileyInternational Journal of Electrochemistry2090-35292090-35372012-01-01201210.1155/2012/527596527596Voltammetric Study of the Copper Pentacyanonitrosylferrate Adsorbed on the Silica Modified with a Poly(propylene)imine Hexadecylamine Dendrimer for Determination of NitriteD. R. do Carmo0S. Gabriel1D. R. Silvestrini2U. O. Bicalho3L. R. Cumba4Departamento de Física e Química, Faculdade de Engenharia de Ilha Solteira, Universidade Estadual Paulista (UNESP), Avenida Brasil Centro 56, 15385-000, Ilha Solteira, SP, BrazilDepartamento de Física e Química, Faculdade de Engenharia de Ilha Solteira, Universidade Estadual Paulista (UNESP), Avenida Brasil Centro 56, 15385-000, Ilha Solteira, SP, BrazilDepartamento de Física e Química, Faculdade de Engenharia de Ilha Solteira, Universidade Estadual Paulista (UNESP), Avenida Brasil Centro 56, 15385-000, Ilha Solteira, SP, BrazilDepartamento de Física e Química, Faculdade de Engenharia de Ilha Solteira, Universidade Estadual Paulista (UNESP), Avenida Brasil Centro 56, 15385-000, Ilha Solteira, SP, BrazilDepartamento de Física e Química, Faculdade de Engenharia de Ilha Solteira, Universidade Estadual Paulista (UNESP), Avenida Brasil Centro 56, 15385-000, Ilha Solteira, SP, BrazilPoly(propylene)imine hexadecylamine dendrimer (DAB-Am-16) was anchored on the surface of 3-chloropropylsilyl silica gel and subsequently interacted with copper nitroprusside. The composite was characterized by infrared (FTIR), energy dispersive X-ray (EDX), and cyclic voltammetry. The above techniques confirmed the successful anchoring of the dendrimer on the silica gel modified surface and its interaction with copper nitroprusside. The cyclic voltammogram of CuNPSD was found to exhibit two redox couples with (Eθ′)1 = 0.30 V and (Eθ′)2 = 0.78 V versus Ag/AgCl (KCl=1.0 mol L−1; 𝑣=20 mV s−1) attributed to the redox processes Cu(I)/Cu(II) and Fe(II)(CN)5NO/Fe(III)(CN)5NO, respectively. The CuNPSD-modified graphite paste electrode was found to show a linear response of 5.0×10−4 to 9.0×10−3 mol L−1 for nitrite determination with a detection limit (DL) of 3.8×10−4 mol L−1 and an amperometric sensitivity of 25.0 mA/mol L−1. The CuNPSD-modified graphite paste electrode was found to show a good electrochemical stability and an excellent response to the electrocatalytic oxidation of sodium nitrite.http://dx.doi.org/10.1155/2012/527596 |
| spellingShingle | D. R. do Carmo S. Gabriel D. R. Silvestrini U. O. Bicalho L. R. Cumba Voltammetric Study of the Copper Pentacyanonitrosylferrate Adsorbed on the Silica Modified with a Poly(propylene)imine Hexadecylamine Dendrimer for Determination of Nitrite International Journal of Electrochemistry |
| title | Voltammetric Study of the Copper Pentacyanonitrosylferrate Adsorbed on the Silica Modified with a Poly(propylene)imine Hexadecylamine Dendrimer for Determination of Nitrite |
| title_full | Voltammetric Study of the Copper Pentacyanonitrosylferrate Adsorbed on the Silica Modified with a Poly(propylene)imine Hexadecylamine Dendrimer for Determination of Nitrite |
| title_fullStr | Voltammetric Study of the Copper Pentacyanonitrosylferrate Adsorbed on the Silica Modified with a Poly(propylene)imine Hexadecylamine Dendrimer for Determination of Nitrite |
| title_full_unstemmed | Voltammetric Study of the Copper Pentacyanonitrosylferrate Adsorbed on the Silica Modified with a Poly(propylene)imine Hexadecylamine Dendrimer for Determination of Nitrite |
| title_short | Voltammetric Study of the Copper Pentacyanonitrosylferrate Adsorbed on the Silica Modified with a Poly(propylene)imine Hexadecylamine Dendrimer for Determination of Nitrite |
| title_sort | voltammetric study of the copper pentacyanonitrosylferrate adsorbed on the silica modified with a poly propylene imine hexadecylamine dendrimer for determination of nitrite |
| url | http://dx.doi.org/10.1155/2012/527596 |
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