Template-Free Hydrothermal Synthesis of Octahedron-, Diamond-, and Plate-like ZrO 2 Mono-Dispersions.

Gao, Ling; Zhi, Hao; Zhang, Shengnan; Liu, Shifeng

Anisotropic ZrO 2 particles with octahedron-, diamond- and plate-like morphologies are successfully synthesized by a facile hydrothermal treatment approach using NaBF 4 as mineralizer. The concentration of mineralizers play a crucial role on the formation of shape-controlled ZrO 2 particles thus affect the particle size. With the increasing concentration of mineralizer, the crystalline sizes of the primary single-crystal and the secondary particle size both increase. With the introduction of NaBF 4 , F − plays an essential role in tuning the crystallinity and size of primary ZrO 2 nanorods along [001] direction. The synergistic effect of F − and B 3 + result in different epitaxial growth rate. And the secondary particles mainly crystallize on the small primary nanoparticles through the oriented attachment mechanism. The as-prepared ZrO 2 particles with different sizes and shapes exhibit different photocatalytic efficiency for the degradation of organic dyes. Under UV irradiation, the highest MB degradation rate of 88% was observed within 60 min for ZrO 2 photocatalyst synthesized with 0.01 mol/L NaBF 4 mineralizer.

HYDROTHERMAL synthesis; EPITAXY; PHOTODEGRADATION; ORGANIC dyes; NANORODS

Nanomaterials (2079-4991), 2022, Vol 12, Issue 19, p3405

2079-4991

Academic Journal

10.3390/nano12193405