TEMPO-Functionalized Nanoporous Au Nanocomposite for the Electrochemical Detection of H2O2
A novel nanocomposite of nanoporous gold nanoparticles (np-AuNPs) functionalized with 2,2,6,6-tetramethyl-1-piperidinyloxy radical (TEMPO) was prepared; assembled carboxyl groups on gold nanoporous nanoparticles surface were combined with TEMPO by the “bridge” of carboxylate-zirconium-carboxylate ch...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | International Journal of Analytical Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2018/1710438 |
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| author | Dongxiao Wen Qianrui Liu Ying Cui Huaixia Yang Jinming Kong |
| author_facet | Dongxiao Wen Qianrui Liu Ying Cui Huaixia Yang Jinming Kong |
| author_sort | Dongxiao Wen |
| collection | DOAJ |
| description | A novel nanocomposite of nanoporous gold nanoparticles (np-AuNPs) functionalized with 2,2,6,6-tetramethyl-1-piperidinyloxy radical (TEMPO) was prepared; assembled carboxyl groups on gold nanoporous nanoparticles surface were combined with TEMPO by the “bridge” of carboxylate-zirconium-carboxylate chemistry. SEM images and UV-Vis spectroscopies of np-AuNPs indicated that a safe, sustainable, and simplified one-step dealloying synthesis approach is successful. The TEMPO-np-AuNPs exhibited a good performance for the electrochemical detection of H2O2 due to its higher number of electrochemical activity sites and surface area of 7.49 m2g-1 for load bigger amount of TEMPO radicals. The TEMPO-functionalized np-AuNPs have a broad pH range and shorter response time for H2O2 catalysis verified by the response of amperometric signal under different pH and time interval. A wide linear range with a detection limit of 7.8 × 10-7 M and a higher sensitivity of 110.403 μA mM-1cm-2 were obtained for detecting H2O2 at optimal conditions. |
| format | Article |
| id | doaj-art-7f429ed09cb84b35b968f76a5b15b3e7 |
| institution | Kabale University |
| issn | 1687-8760 1687-8779 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Analytical Chemistry |
| spelling | doaj-art-7f429ed09cb84b35b968f76a5b15b3e72025-02-03T06:42:22ZengWileyInternational Journal of Analytical Chemistry1687-87601687-87792018-01-01201810.1155/2018/17104381710438TEMPO-Functionalized Nanoporous Au Nanocomposite for the Electrochemical Detection of H2O2Dongxiao Wen0Qianrui Liu1Ying Cui2Huaixia Yang3Jinming Kong4Pharmacy College, Henan University of Chinese Medicine, Zhengzhou 450008, ChinaSchool of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaPharmacy College, Henan University of Chinese Medicine, Zhengzhou 450008, ChinaPharmacy College, Henan University of Chinese Medicine, Zhengzhou 450008, ChinaSchool of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaA novel nanocomposite of nanoporous gold nanoparticles (np-AuNPs) functionalized with 2,2,6,6-tetramethyl-1-piperidinyloxy radical (TEMPO) was prepared; assembled carboxyl groups on gold nanoporous nanoparticles surface were combined with TEMPO by the “bridge” of carboxylate-zirconium-carboxylate chemistry. SEM images and UV-Vis spectroscopies of np-AuNPs indicated that a safe, sustainable, and simplified one-step dealloying synthesis approach is successful. The TEMPO-np-AuNPs exhibited a good performance for the electrochemical detection of H2O2 due to its higher number of electrochemical activity sites and surface area of 7.49 m2g-1 for load bigger amount of TEMPO radicals. The TEMPO-functionalized np-AuNPs have a broad pH range and shorter response time for H2O2 catalysis verified by the response of amperometric signal under different pH and time interval. A wide linear range with a detection limit of 7.8 × 10-7 M and a higher sensitivity of 110.403 μA mM-1cm-2 were obtained for detecting H2O2 at optimal conditions.http://dx.doi.org/10.1155/2018/1710438 |
| spellingShingle | Dongxiao Wen Qianrui Liu Ying Cui Huaixia Yang Jinming Kong TEMPO-Functionalized Nanoporous Au Nanocomposite for the Electrochemical Detection of H2O2 International Journal of Analytical Chemistry |
| title | TEMPO-Functionalized Nanoporous Au Nanocomposite for the Electrochemical Detection of H2O2 |
| title_full | TEMPO-Functionalized Nanoporous Au Nanocomposite for the Electrochemical Detection of H2O2 |
| title_fullStr | TEMPO-Functionalized Nanoporous Au Nanocomposite for the Electrochemical Detection of H2O2 |
| title_full_unstemmed | TEMPO-Functionalized Nanoporous Au Nanocomposite for the Electrochemical Detection of H2O2 |
| title_short | TEMPO-Functionalized Nanoporous Au Nanocomposite for the Electrochemical Detection of H2O2 |
| title_sort | tempo functionalized nanoporous au nanocomposite for the electrochemical detection of h2o2 |
| url | http://dx.doi.org/10.1155/2018/1710438 |
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