利用钛有机骨架材料制备微米级TiO2色谱填料

Preparation of Micron⁃Sized Chromatographic Packing TiO2 by Titanium Organic Frameworks

李书启 刘真真 李荣 姜子涛

Shuqi Li Zhenzhen Liu Rong Li Zitao Jiang

天津天狮学院，食品工程学院，天津 301700 天津商业大学，生物技术与食品科学学院，天津 300134

School of Food Engineering，Tianjin Tianshi College，Tianjin 301700，China College of Biotechnology and Food Science，Tianjin University of Commerce，Tianjin 300134，China

以钛有机骨架材料（MIL?125(Ti)）作为核和壳材料，通过外延生长法合成了粒径更大、更均匀的核壳材料，即MIL?125(Ti)包覆MIL?125(Ti) (MOFs@MOFs)，再通过煅烧可得到微米级TiO2色谱填料。考察了核加入质量、壳溶液稀释倍数、反应时间、包覆层数等对包覆效果的影响，得到最佳的制备条件为核加入质量30 mg，不稀释壳溶液，反应24 h，包覆1层。结果表明，利用钛有机骨架材料制备得到的TiO2色谱填料为锐钛矿型，比表面积76.0 m2/g，粒径可以达到7 μm左右，厚度为2.5 μm左右，不仅保留了其优良的性能，还具备粒径大、可调控多孔结构等特点。此外，该方法操作简便，无需苛刻的合成条件，可操作性强。

Titanium metal?organic frameworks (MIL?125(Ti)) were used as the core and shell materials.On this basis,a core?shell material with larger and more uniform particle size denoted as MIL?125(Ti) coated MIL?125(Ti) (MOFs@MOFs) was synthesized by the epitaxial growth method, which was then calcined to obtain micron?sized chromatographic packing TiO2.The preparation conditions,incuding adding amount of core materials,dilution times of shell solution,reaction time,and coating layers,were investigated,which were optimized to be that the amount of core was 30 mg,the shell solution should not be diluted,the reaction time was 24 h,and the coating layer was 1 layer.The results showed that the anatase TiO2 materials with a specific surface area of 76.0 m2/g,a particle size of about 7 μm,and a thickness of about 2.5 μm,were successfully prepared by MOFs@MOFs,The synthesized TiO2 not only retained the excellent performance of MOFs@MOFs but also featured a large particle size and adjustable porous structure.In addition,the method was easy to operate without demanding synthesis conditions,and had strong operability.

国家自然科学基金项目(20875069);天津市高等学校自然科学研究项目(2020KJ071)

10.3969/j.issn.1006-396X.2021.04.003