Is it possible to use Glutardialdehyde instead of Nafion solution in the process of loading CNT/Pt on Carbon paper?
Dear Mehrdad,
Yes, it is possible.
Attached is a review covers this topic. The following paragraph was taken from the review which indicates the use of Glutardialdehyde instead of Nafion :
4.5.2. Chemical Cross-Linking
Chemical cross-linking involves covalent attachment of the enzyme onto CNT via a linker molecule such as glutaraldehyde (Figure 7). Covalent attachment provides a much stronger attachment method than physical adsorption and may provide the enzyme with a higher catalytic activity. Carpani et al., demonstrated an amperometric GOx biosensor based on cross-linkage to a SWCNT-modified
electrode [87]. The glass carbon (GC) electrodes were polished with emery paper and aqueous alumina slurry. Then, the electrode was electrochemically activated to generate an oxide layer. To do this, an oxidative treatment was carried out in a LiClO4 solution, and by applying a positive potential. Purified SWCNTs were dispersed in dimethylformamide (DMF) with ultrasonication, resulting in a black CNT suspension. The resulting mixture was dropped onto the GC. Glucose biosensors were prepared by coating the surface of the two kinds of electrodes with enzymatic solution, containing GOx in 0.1 M PBS. The electrodes were allowed to dry in air and were kept in a chamber saturated with the vapors of glutaraldehyde solution at room temperature. The treatment with a cross-linking agent aimed to avoid the enzyme release. Cyclic voltammetry revealed that the CNT-modified electrode gave a similar electric response as the activated glass electrode. Although the activated GC electrode gave a lower detection limit and a higher S/N ratio, the CNT-modified biosensor had a higher sensitivity, attributed
to the direct electron transfer between the active site and CNT. The authors concluded that both biosensors gave comparable results.
Hoping this will be helpful,
Rafik
based on that characteristics of carbon papers,that mean quality of papers
Enzyme was cross-linked by glutaraldehyde with CNTs or carbon paper. Nafion is used for depositing or loading CNT/Pt on Carbon paper. A polymer Nafion is used as the electrolyte and deposited in a CNT/Pt on Carbon paper film,
Enzyme was cross-linked by glutaraldehyde with CNTs or carbon paper. Nafion is used for depositing or loading CNT/Pt on Carbon paper. A polymer Nafion is used as the electrolyte and deposited in a CNT/Pt on Carbon paper film,
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