In the SEM images of some articles, nanoparticles dispersed in the electrospinning solution are seen as prominent spots on the fibers, but in others, there are no prominent effects on the nanofibers in the images.
ZIF-8 nanoparticles in electrospun nanofibers can be identified using techniques such as SEM for morphology, EDS for elemental analysis, XRD for crystallinity, and XPS for chemical state assessment. These methods collectively confirm the presence and characteristics of ZIF-8 within the nanofibers.
One thing that worked well with NIPAM microgels was to freeze dry the solution first. This maintains the morphology and then using SEM you can determine how well the nanoparticles are dispersed on the fibres. I hope this helps.
Abdelhak Maghchiche
When the nanoparticles are not visible on the nanofibers in the SEM images, and zinc is visible everywhere in the mapping, how can we be sure that there are nanoparticles inside the fibers? And it must have been electrospun with polymer solution and exist in the form of nanoparticles (and not dissolved)?
How can we tell from the XRD. Because the peak of around 7 (in ZIF ) is also not visible in the XRD.
Suggested Procedure:
By combining these techniques, you can reliably identify ZIF-8 nanoparticles in electrospun nanofibers and assess their incorporation and integrity.
To identify ZIF-8 nanoparticles within electrospun nanofibers, you can use techniques like Scanning Electron Microscopy (SEM) with Energy Dispersive X-ray (EDX) spectroscopy, X-ray Diffraction (XRD), Fourier Transform Infrared (FTIR) spectroscopy, and Transmission Electron Microscopy (TEM) to visualize the morphology, elemental composition, crystalline structure, and chemical bonds of the ZIF-8 nanoparticles embedded within the nanofibers.Key points to consider:
- SEM with EDX:SEM provides detailed surface morphology of the nanofibers, allowing you to observe the presence of ZIF-8 particles as distinct features on the fiber surface.
- EDX analysis can confirm the presence of zinc (Zn) and nitrogen (N) elements, which are key components of ZIF-8.
- XRD:XRD pattern can identify the crystalline structure of ZIF-8 by comparing the observed diffraction peaks with the known ZIF-8 pattern.
- This is a crucial step to confirm the successful synthesis and integration of ZIF-8 within the nanofibers.
- FTIR:FTIR spectroscopy can be used to analyze the functional groups present in the ZIF-8 structure, including the characteristic peaks associated with the imidazole ring.
- By comparing the FTIR spectra of pure polymer and the ZIF-8 incorporated nanofibers, you can identify the presence of ZIF-8.
- TEM:For a more detailed analysis of the size, shape, and distribution of ZIF-8 nanoparticles within the nanofibers, TEM imaging can be used.
Important factors to consider when analyzing ZIF-8 in electrospun nanofibers:
- Loading concentration:The amount of ZIF-8 incorporated into the nanofibers will affect the intensity of the characteristic signals in your analysis.
- Nanofiber morphology:The morphology of the electrospun nanofibers can influence how easily you can identify the ZIF-8 nanoparticles.
- Analysis conditions:Optimize the analysis parameters for each technique to obtain accurate and reliable results.Scholarly articles for How can we identify ZIF-8 nanoparticles in electrospun nanofibers
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