Controllable synthesis of hierarchical micro/nano structured FePO4 particles under synergistic effects of ultrasound irradiation and impinging stream

Bin Dong, Hongliang Qian, Chenyang Xue, Xiaogang Yang, Guang Li, George Z. Chen

Research output: Journal PublicationArticlepeer-review

5 Citations (Scopus)

Abstract

Hierarchical micro/nano-structured FePO4 (FP) particles were environmental-friendly and controllable synthesized through synergistic intensification of ultrasound and impinging streams. Nano-scale FP seeds were firstly synthesized via ultrasound irradiation intensified impinging stream reaction (UISR), where the enhanced turbulent micromixing in the impinging streams benefits the nucleation process while the application of ultrasound to the impinging streams further intensifies such micromixing. The ultrasound frequency and power applied were 20 kHz and 600 W. The hierarchical micro/nano-structured FP particles are obtained when taking sufficient reaction time and stirring FP nano-seeds in a continuous stirring tank reactor (CSTR). Effects of the sonochemical pre-treatment, mean residence time and rotation speed on the physical-chemical properties of FP were investigated systematically. The characterization revealed that under the optimum operating condition, the FP particles presented near-spherical hierarchical micro/nano-structure, consisting of nanoscale primary grains. The mechano-chemical effects on the synthesized FP particles during different synthesis process were also studied.

Original languageEnglish
Pages (from-to)4292-4300
Number of pages9
JournalAdvanced Powder Technology
Volume31
Issue number10
DOIs
Publication statusPublished - Oct 2020

Keywords

  • FePO
  • Fluid dynamics
  • Hierarchical micro/nano-structure
  • Mechano-chemical effects
  • Micromixing

ASJC Scopus subject areas

  • General Chemical Engineering
  • Mechanics of Materials

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