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.

微观/纳米结构FePO ₄（FP）颗粒通过超声和​​撞击流的协同增强而环保且可控。纳米级FP种子首先通过超声辐射增强的撞击流反应（UISR）合成，其中撞击流中增强的湍流微混合有利于成核过程，而将超声波应用于撞击流则进一步增强了这种微混合。施加的超声频率和功率为20 kHz和600W。在连续搅拌釜反应器（CSTR）中花费足够的反应时间并搅拌FP纳米种子时，可获得分层的微/纳米结构FP颗粒。系统研究了声化学预处理，平均停留时间和转速对FP的理化性质的影响。表征表明，在最佳操作条件下，FP颗粒呈现出近球形的分级纳米/纳米结构，由纳米级初级晶粒组成。还研究了在不同合成过程中对合成FP颗粒的机械化学作用。