In this article, we explore how electron microscopy can be used to gain deeper insights into zeolite samples.
Image Credit: Yushchuk Myroslava/Shutterstock.com
Some research is even making use of nanoscience synthetic methods to create not just nanosized pores within the zeolite structures but zeolite crystals on the nanoscale.4 Many of the early analytical methods were focused on the bulk structures of the zeolites, which all of the aforementioned techniques are suitable for. Many of the spectroscopic techniques struggle with zeolite studies. While techniques like Raman and infrared are very sensitive to any molecules that have become bound to a surface, visualizing the spatial arrangement of molecules means combining them with microscopy versions of the technique.
By using optimum bright-field scanning transmission electron microscopy, researchers have been able to produce images with a signal-to-noise ratio that was two orders of magnitude greater than with conventional techniques. Using lower electron doses also helped prevent beam damage to the sample. In conclusion, electron microscopy methods offer a powerful new suite of tools for achieving atomic-scale spatial resolution in zeolite imaging. Being able to visualize exactly where potential molecules or ions bind or interact will help researchers refine and develop new classes of zeolite material that can exploit these interactions for applications in waste filtering, gas storage and chemical catalysis.
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