A Microstructured Cover Flow Mixer for Hydrothermal Synthesis of ZnO Nanoparticles in Supercritical Water

A microstructured cover flow mixer equipped with two cyclone structures was used for stable continuous hydrothermal synthesis of ZnO nanoparticles from Zn(NO3)2 and NaOH aqueous solutions in supercritical water. The effects of the NaOH/Zn(NO3)2 ratio, Zn(NO3)2 molality, and flow rate on Zn conversio...

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Bibliographic Details
Published inJournal of chemical engineering of Japan Vol. 56; no. 1
Main Authors Sue, Kiwamu, Kölbl, Andreas, Kraut, Manfred, Dittmeyer, Roland
Format Journal Article
LanguageEnglish
Published Tokyo Taylor & Francis Group 31.12.2023
Subjects
Aqueous solutions
Clogging prevention
Cover flow mixer
Crystal structure
Cyclone
Flow rates
Hydrothermal crystal growth
Hydrothermal synthesis
Mixers
Nanoparticles
Oxide nanoparticles
Sodium hydroxide
Synthesis
Zinc
Zinc oxide
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Summary:A microstructured cover flow mixer equipped with two cyclone structures was used for stable continuous hydrothermal synthesis of ZnO nanoparticles from Zn(NO3)2 and NaOH aqueous solutions in supercritical water. The effects of the NaOH/Zn(NO3)2 ratio, Zn(NO3)2 molality, and flow rate on Zn conversion, crystal structure, particle size, particle morphology, and mixer clogging were examined. The advantages of this mixer were identified by comparing with the results obtained using the same chemical conditions with tee-type, cross-type, and central collision-type mixers.
ISSN:0021-9592
1881-1299
DOI:10.1080/00219592.2023.2197465