以正硅酸乙酯（TEOS）为硅源，Na₂HPO₄·12H₂O-NaOH碱性缓冲溶液为催化剂，采用溶胶-凝胶法制备纳米级单分散的SiO₂微囊。通过扫描电子显微镜、透射电子显微镜和傅里叶红外光谱仪等分析手段对所制备的纳米SiO₂微囊进行表征。结果表明，所制得的纳米SiO₂微囊形貌规整，具有较大的空腔结构，微囊的直径大小为250~400 nm，囊壁厚度为15~35 nm，分散性良好，具有单分散或窄分散性。

Nano-scale mono-dispersed SiO₂ microcapsules are synthesized by the sol-gel method with Na₂HPO₄·12H₂O-NaOH alkaline buffer solution as catalyst,ethyl orthosilicate (TEOS) as silicon source.The as-synthesized SiO₂ microcapsules are characterized and analyzed by scanning electron microscope (SEM),transmission electron microscope (TEM) and Fourier transform infrared spectrometer (FT-IR).The results indicate that the as-prepared SiO₂ microcapsules are in good dispersion,uniform size and have the regular structures with a large cavity.The diameter of the microcapsules can be controlled ranging from 250 nm to 400 nm,and the thickness of the capsule shell ranging from 15 nm to 35 nm.

李筱晗(1996-),女,本科生,主要从事纳米材料的研究及应用,719468271@qq.com