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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Study on the structural and electrocatalytic properties of Ba2+- and Eu3+-doped silica xerogels as sensory platforms

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Author(s):
Raymundo-Pereira, Paulo A. ; Ceccato, Diego A. ; Junior, Airton G. B. ; Teixeira, Marcos F. S. ; Lima, Sergio A. M. ; Pires, Ana. M.
Total Authors: 6
Document type: Journal article
Source: RSC ADVANCES; v. 6, n. 106, p. 104529-104536, 2016.
Web of Science Citations: 3
Abstract

This work reports on the sol-gel synthesis of barium- and europium-doped silica xerogel and its use as an electrocatalytic sensor. Barium was chosen to assist the network framing and europium to provide electronic properties, including the Eu2+/Eu3+ redox process. The results from different molecular and structural techniques indicated that this xerogel is a composite material that combines a non-crystalline polymeric silica network with a high level of agglomeration and a low degree of reticulation formed by the hydrolysis and condensation of TEOS and M-O bonds (M = Ba2+ and/or Eu3+), whereas the oxygen atoms belong to the xerogel phase. The electrochemical behavior of the silica xerogel: Ba2+, Eu3+ with different amounts of Eu3+ under several different conditions was investigated. The electrochemical sensing platform showed a well-defined redox coupling with a formal potential of 0.06 V, assigned to europium redox sites in silicate. Electrocatalytic activity was observed with an increasing anodic peak current to the isoniazid oxidation, indicating that the electrochemical sensing platform designed here was successfully achieved. (AU)

FAPESP's process: 16/01919-6 - Design and fabrication of nanostructured flexible devices for biomarkers detection
Grantee:Paulo Augusto Raymundo Pereira
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 12/17689-9 - Preparation and characterization of bifunctional-nanostructured surfaces of Au-Pt obtained via templates for application in sensors and biosensors
Grantee:Paulo Augusto Raymundo Pereira
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 08/07298-7 - Study of polymeric films of thiophene-Schiff base complexes in the construction of electrochemical sensors
Grantee:Paulo Augusto Raymundo Pereira
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 15/10394-1 - LBL luminescent thin films of rare earth doped Ba2SiO4 obtained via sol-gel for white LED application
Grantee:Airton Germano Bispo Júnior
Support Opportunities: Scholarships in Brazil - Master