| Autor: |
Kolzunova, Lidiia, Shchitovskaya, Elena, Karpenko, Maxim |
| Předmět: |
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| Zdroj: |
Applied Nanoscience; Nov2022, Vol. 12 Issue 11, p3363-3372, 10p |
| Abstrakt: |
The characteristics of the electrochemical synthesis of the polymethylolacrylamide/gold nanoparticles (PMAA/AuNPs) composite are studied. It was shown that, in contrast to multistage traditional technologies, the electrochemical approach allows combining all intermediate stages in one cycle, which greatly simplifies the process and reduces the total time for forming the composite. The inclusion of AuNPs in the PMAA matrix has been corroborated by X-ray diffraction analysis, SEM, SAXS, and plasmon resonance. The radius of the AuNPs was from 5–12 nm to 20–25 nm. The AuNPs are distributed on the surface and into of the composite films. The average content of AuNPs was 4.5 times higher on the near-cathode surface than from the near-solution side. The addition of chitosan contributed to the redistribution of AuNPs into the bulk of the composite film. It was established that the composite films are permeable to depolarizers. Diffusion was the limiting stage of this process. The catalytic activity of PMAA/AuNPs composites was studied on the example of 4-nitrophenol reduction. It was revealed that the catalytic activity is higher for films without chitosan due to the better permeability of 4-nitrophenol into the bulk of the composite. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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