Designing of Au doped TiO2 NPs as an electrocatalyst for nitrite sensor
In the present work, a simple ionothermal protocol for the synthesis of Au doped TiO2 and its subsequent application as an electrochemical interface for the trace level electroanalytical quantification of nitrite ion has been described. The surface morphology and the composition has been described w...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-01-01
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| Series: | Results in Chemistry |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211715623002035 |
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| author | G.K. Raghu T.N. Ravishankar T. Ramakrishnappa Suresh Kumar Suma B. Patri K.M. Supritha Malingappa Pandurangappa |
| author_facet | G.K. Raghu T.N. Ravishankar T. Ramakrishnappa Suresh Kumar Suma B. Patri K.M. Supritha Malingappa Pandurangappa |
| author_sort | G.K. Raghu |
| collection | DOAJ |
| description | In the present work, a simple ionothermal protocol for the synthesis of Au doped TiO2 and its subsequent application as an electrochemical interface for the trace level electroanalytical quantification of nitrite ion has been described. The surface morphology and the composition has been described with the help of Scanning electron microscope and Energy Dispersive X-Ray techniques. Further, it has been used in the fabrication of thin film electrodes by a simple physical drop casting method. Cyclic voltammetry has been used to decipher the electrocatalytic property of the modified interface towards nitrite ions and square wave voltammetry to work in the low concentration levels of nitrite ions. The developed sensor interface revealed superior nitrite sensing performance in the dynamic concentration range from 3.3 to 120 µM with a very low experimental detection limit of 0.095 µM with a sensitivity of 0.9973. The analytical applicability of the developed interference has been validated by determining the presence of nitrite from real samples with least interference from commonly encountered foreign ions. The stability and reproducibility of the proposed interface has been studied over a period of several months and the results were found to be highly reproducible with a relative standard deviation of ± 5 %. These results show that, the proposed interface electrode display better electrocatalytic activity compared to the previously reported sensors for the electro oxidation of nitrite ions. |
| first_indexed | 2024-03-13T04:12:59Z |
| format | Article |
| id | doaj.art-dd5a97e41cf4464e840c870488110433 |
| institution | Directory Open Access Journal |
| issn | 2211-7156 |
| language | English |
| last_indexed | 2024-03-13T04:12:59Z |
| publishDate | 2023-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Chemistry |
| spelling | doaj.art-dd5a97e41cf4464e840c8704881104332023-06-21T06:52:44ZengElsevierResults in Chemistry2211-71562023-01-015100964Designing of Au doped TiO2 NPs as an electrocatalyst for nitrite sensorG.K. Raghu0T.N. Ravishankar1T. Ramakrishnappa2Suresh Kumar3Suma B. Patri4K.M. Supritha5Malingappa Pandurangappa6Department of Chemistry, Siddaganga Institute of Technology, Affiliated to VTU, Tumakuru 572103, Karnataka, India; Corresponding author.Centre for Nanoscience and Nanotechnology, Department of Chemistry, Global Academy of Technology, Rajarajeshwarinagar, (off Mysore Road), Ideal Homes Township, Bangalore 560098, Karnataka, IndiaDepartment of Chemistry, BMS Institute of Technology and Management, Bengaluru 560064, IndiaDepartment of Chemistry, BMS Institute of Technology and Management, Bengaluru 560064, IndiaDepartment of Chemistry, Bangalore City University, Bangalore, Karnataka, IndiaDepartment of Chemistry, Bangalore City University, Bangalore, Karnataka, IndiaDepartment of Chemistry, Bangalore City University, Bangalore, Karnataka, IndiaIn the present work, a simple ionothermal protocol for the synthesis of Au doped TiO2 and its subsequent application as an electrochemical interface for the trace level electroanalytical quantification of nitrite ion has been described. The surface morphology and the composition has been described with the help of Scanning electron microscope and Energy Dispersive X-Ray techniques. Further, it has been used in the fabrication of thin film electrodes by a simple physical drop casting method. Cyclic voltammetry has been used to decipher the electrocatalytic property of the modified interface towards nitrite ions and square wave voltammetry to work in the low concentration levels of nitrite ions. The developed sensor interface revealed superior nitrite sensing performance in the dynamic concentration range from 3.3 to 120 µM with a very low experimental detection limit of 0.095 µM with a sensitivity of 0.9973. The analytical applicability of the developed interference has been validated by determining the presence of nitrite from real samples with least interference from commonly encountered foreign ions. The stability and reproducibility of the proposed interface has been studied over a period of several months and the results were found to be highly reproducible with a relative standard deviation of ± 5 %. These results show that, the proposed interface electrode display better electrocatalytic activity compared to the previously reported sensors for the electro oxidation of nitrite ions.http://www.sciencedirect.com/science/article/pii/S2211715623002035IonothermalInterfaceNitriteReal samples |
| spellingShingle | G.K. Raghu T.N. Ravishankar T. Ramakrishnappa Suresh Kumar Suma B. Patri K.M. Supritha Malingappa Pandurangappa Designing of Au doped TiO2 NPs as an electrocatalyst for nitrite sensor Results in Chemistry Ionothermal Interface Nitrite Real samples |
| title | Designing of Au doped TiO2 NPs as an electrocatalyst for nitrite sensor |
| title_full | Designing of Au doped TiO2 NPs as an electrocatalyst for nitrite sensor |
| title_fullStr | Designing of Au doped TiO2 NPs as an electrocatalyst for nitrite sensor |
| title_full_unstemmed | Designing of Au doped TiO2 NPs as an electrocatalyst for nitrite sensor |
| title_short | Designing of Au doped TiO2 NPs as an electrocatalyst for nitrite sensor |
| title_sort | designing of au doped tio2 nps as an electrocatalyst for nitrite sensor |
| topic | Ionothermal Interface Nitrite Real samples |
| url | http://www.sciencedirect.com/science/article/pii/S2211715623002035 |
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