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Te oxide nanowires as advanced materials for amperometric nonenzymatic hydrogen peroxide sensing.
Talanta 2013; 115:863-9T

Abstract

A new nonenzymatic platinum Te oxide nanowires modified electrode (Pt/TeO2-NWs) for amperometric detection of hydrogen peroxide (H2O2) is proposed. The modified electrode has been developed by direct drop casting, with TeO2 nanowires (TeO2-NWs), synthesized by thermal evaporation of Te(0) in an oxygen atmosphere. The morphological and spectroscopic characterization of the TeO2-NWs as synthesized on Pt foil was performed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis. XPS and XRD analyses are especially involved to gain information on the chemical environment of TeO2-NWs in contact with Pt surface. Moreover electrochemical characterization of these new modified Pt/TeO2-NWs modified electrodes was performed by Cyclic Voltammetry (CV) and Cronoamperometry (CA) in phosphate buffer (pH=7; I=0.2) to investigate the sensing properties of this material against H2O2. The proposed sensor exhibits a wide linear and dynamic range from 2 µM to 16 mM (R(2)=0.9998) and the detection limit is estimated to be 0.6 µM (S/N=3). Moreover, this sensor shows a rapid amperometric response time of less than 5s and possessed good reproducibility. These results indicate that Pt/TeO2-NWs composite is suitable to be used as material for sensing applications.

Authors+Show Affiliations

Department of Di.S.Te.B.A., University of Salento, Via Monteroni, 73100 Lecce, Italy. Electronic address: maria.rachele.guascito@unisalento.it.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24054675

Citation

Guascito, Maria Rachele, et al. "Te Oxide Nanowires as Advanced Materials for Amperometric Nonenzymatic Hydrogen Peroxide Sensing." Talanta, vol. 115, 2013, pp. 863-9.
Guascito MR, Chirizzi D, Malitesta C, et al. Te oxide nanowires as advanced materials for amperometric nonenzymatic hydrogen peroxide sensing. Talanta. 2013;115:863-9.
Guascito, M. R., Chirizzi, D., Malitesta, C., Siciliano, T., & Tepore, A. (2013). Te oxide nanowires as advanced materials for amperometric nonenzymatic hydrogen peroxide sensing. Talanta, 115, pp. 863-9. doi:10.1016/j.talanta.2013.06.032.
Guascito MR, et al. Te Oxide Nanowires as Advanced Materials for Amperometric Nonenzymatic Hydrogen Peroxide Sensing. Talanta. 2013 Oct 15;115:863-9. PubMed PMID: 24054675.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Te oxide nanowires as advanced materials for amperometric nonenzymatic hydrogen peroxide sensing. AU - Guascito,Maria Rachele, AU - Chirizzi,Daniela, AU - Malitesta,Cosimino, AU - Siciliano,Tiziana, AU - Tepore,Antonio, Y1 - 2013/07/05/ PY - 2013/02/27/received PY - 2013/06/17/revised PY - 2013/06/20/accepted PY - 2013/9/24/entrez PY - 2013/9/24/pubmed PY - 2014/4/16/medline KW - Amperometric sensor KW - H(2)O(2) detection KW - Nonenzymatic KW - TeO(2) nanowires SP - 863 EP - 9 JF - Talanta JO - Talanta VL - 115 N2 - A new nonenzymatic platinum Te oxide nanowires modified electrode (Pt/TeO2-NWs) for amperometric detection of hydrogen peroxide (H2O2) is proposed. The modified electrode has been developed by direct drop casting, with TeO2 nanowires (TeO2-NWs), synthesized by thermal evaporation of Te(0) in an oxygen atmosphere. The morphological and spectroscopic characterization of the TeO2-NWs as synthesized on Pt foil was performed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis. XPS and XRD analyses are especially involved to gain information on the chemical environment of TeO2-NWs in contact with Pt surface. Moreover electrochemical characterization of these new modified Pt/TeO2-NWs modified electrodes was performed by Cyclic Voltammetry (CV) and Cronoamperometry (CA) in phosphate buffer (pH=7; I=0.2) to investigate the sensing properties of this material against H2O2. The proposed sensor exhibits a wide linear and dynamic range from 2 µM to 16 mM (R(2)=0.9998) and the detection limit is estimated to be 0.6 µM (S/N=3). Moreover, this sensor shows a rapid amperometric response time of less than 5s and possessed good reproducibility. These results indicate that Pt/TeO2-NWs composite is suitable to be used as material for sensing applications. SN - 1873-3573 UR - https://www.unboundmedicine.com/medline/citation/24054675/Te_oxide_nanowires_as_advanced_materials_for_amperometric_nonenzymatic_hydrogen_peroxide_sensing_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0039-9140(13)00532-8 DB - PRIME DP - Unbound Medicine ER -