CAJ | 학술논문

通过钛酸盐和氧化钛溶胶两种制备途径在氧化铝(Al2O3)支撑体外包覆介孔氧化钛(TiO2)层，分析了这两种途径制备的氧化钛表面结构与性质的差异及其对于BSA蛋白吸附性能的影响。以粒径分别为0.37、10.4和21.8μm的三种氧化铝支撑体作为基材，用 XRD、Raman 分析了两种路径制备的氧化钛晶型均为锐钛矿相；N2吸脱附分析其比表面积均在（100±10）m2·g-1，两者具有相似的介孔结构。FESEM分析发现钛酸钾溶胶制备的氧化钛的形貌受到支撑体孔径的影响。对于在牛血清蛋白(BSA)吸附实验中，钛酸钾溶胶法包覆的20μm 粒径复合载体（SP20@K-TiO2）吸附量为22.18 mg·g-1，高于相同条件下氧化钛溶胶制备的Al2O3@TiO2复合载体。SP20@K-TiO2中TiO2吸附量为150.88 mg·g-1，相比于TiO2粉体，复合载体中TiO2对BSA蛋白吸附的性能得到提升。
통과태산염화양화태용효량충제비도경재양화려(Al2O3)지탱체외포복개공양화태(TiO2)층，분석료저량충도경제비적양화태표면결구여성질적차이급기대우BSA단백흡부성능적영향。이립경분별위0.37、10.4화21.8μm적삼충양화려지탱체작위기재，용 XRD、Raman 분석료량충로경제비적양화태정형균위예태광상；N2흡탈부분석기비표면적균재（100±10）m2·g-1，량자구유상사적개공결구。FESEM분석발현태산갑용효제비적양화태적형모수도지탱체공경적영향。대우재우혈청단백(BSA)흡부실험중，태산갑용효법포복적20μm 립경복합재체（SP20@K-TiO2）흡부량위22.18 mg·g-1，고우상동조건하양화태용효제비적Al2O3@TiO2복합재체。SP20@K-TiO2중TiO2흡부량위150.88 mg·g-1，상비우TiO2분체，복합재체중TiO2대BSA단백흡부적성능득도제승。
A series of Al2O3@TiO2 composite supports were prepared and they were covered with a layer of mesoporous TiO2 by using titanate sol or titania sol. The differences of structures and properties of two TiO2 samples and their influences on adsorption of bovine serum albumin (BSA) were analyzed. The pore sizes of three alumina supports were 0.37,10.4 and 21.8μm respectively. The results of XRD and Raman spectroscopy showed that both TiO2 samples were anatase phase. In addition, N2 adsorption-desorption isotherms showed that two samples had similar surface area [(100±10) m2·g-1] and mesoporous structure. Moreover, FESEM image indicated that the morphologies of TiO2 prepared from potassium titanate sol were affected by pore diameter of Al2O3support. BSA adsorption performance indicated that the adsorption capacity of 20μm Al2O3@TiO2 composite support prepared with potassium titanate sol (SP20@K-TiO2) was 22.18 mg·g-1, higher than the same size composite support prepared with titania sol. The adsorption capacity of TiO2 in SP20@K-TiO2 waps 150.88 mg·g-1. Compared with TiO2 powder, the BSA adsorption performance of TiO2 in the composite support was promoted.