Low Temperature Synthesis of Zeolite Films on Glassy Carbon: Towards Designing Molecularly Selective Electrochemical Devices

Faujasite‐type zeolite films have been grown on glassy carbon electrode surfaces embedded in an epoxy resin matrix by a quasi ambient temperature hydrothermal synthesis. The resulting zeolite modified electrodes are mechanically stable and provide an advantageous combination of electrochemical detec...

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Bibliographic Details
Published in:Electroanalysis (New York, N.Y.) N.Y.), 2004-09, Vol.16 (18), p.1550-1554
Main Authors: Walcarius, Alain, Ganesan, Vellaichamy, Larlus, Olivier, Valtchev, Valentin
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemical Sciences
Diffusion
Film electrodes
Molecular sieves
Selective recognition/discrimination
Voltammetric analysis
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Summary:Faujasite‐type zeolite films have been grown on glassy carbon electrode surfaces embedded in an epoxy resin matrix by a quasi ambient temperature hydrothermal synthesis. The resulting zeolite modified electrodes are mechanically stable and provide an advantageous combination of electrochemical detection with charge and size selectivities at the molecular level, as demonstrated with the aid of some model electroactive probes or analytes (Ru(NH3)63+, Fe(CN)63−, Ru(bpy)32+, dopamine, ascorbic acid). To act efficiently as a physical molecular sieve barrier between the electrode surface and the external solution, these films must have a thickness of about 0.7 μm. These results open the door for further development of molecular sieving electrochemistry.
ISSN:1040-0397
1521-4109
DOI:10.1002/elan.200302991