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In Situ Ultrasound Monitoring of Fast ZIF-8 Nanoparticle Synthesis
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DOI：10.1021/acs.cgd.6c00040.png)
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Abstract
En 中文
The synthesis of zeolitic imidazolate framework-8 (ZIF-8) nanoparticles was investigated using in situ ultrasound monitoring. Particle formation was tracked by measuring ultrasound attenuation and velocity via the pulse-echo method. This noninvasive technique enables the observation of molecular sieve syntheses in both solid and liquid phases with high time-resolution without interfering with the process. The method offers novel insights into the formation mechanism of ZIF-8, including the identification of a crystalline intermediate phase, ZIF-L, prior to the formation of ZIF-8. We show that the ultrasound attenuation is sensitive to the nanoparticle size and can be, thus, used for determination of the particle size in future applications.
Keywords:
Metal organic frameworks
Nanoparticles
Particle size
Physical and chemical processes
Ultrasound
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