Formation mechanism of different microarchitectures In order to shed

3a, the crystal phase of the obtained products always retains the hexagonal structure at different reaction time. No impurity peaks are observed, and the diffraction peaks of the three samples are comparatively the same, suggesting that the as-prepared microcrystals have good crystallinity. It should be noted that the relative intensity of some specific diffraction peaks for the sample with 12 h reaction time is obviously different, in comparison with the other two samples (3 h and 9 h).