Preparation of Al2O3@TiO2 biological composite support and adsorption of bovine serum albumin

JI Tuo; CHEN Xianfu; JI Xinghong; WANG Xibing; YANG Zhuhong; LU Xiaohua

doi:10.3969/j.issn.0438-1157.2014.05.052

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Preparation of Al₂O₃@TiO₂ biological composite support and adsorption of bovine serum albumin

更新时间：2025-12-10

- Preparation of Al₂O₃@TiO₂ biological composite support and adsorption of bovine serum albumin
- CIESC Journal Issue 5, (2014)
- 作者机构：
  
  南京工业大学材料化学工程国家重点实验室,江苏,南京,210009
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.05.052
  CLC： Q028.8
- Online First：05 May 2014，
  
  Published：05 May 2014
- 稿件说明：
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JI Tuo, CHEN Xianfu, JI Xinghong, et al. Preparation of Al₂O₃@TiO₂ biological composite support and adsorption of bovine serum albumin[J]. CIESC Journal, 2014, (5). DOI: 10.3969/j.issn.0438-1157.2014.05.052.
DOI：

JI Tuo, CHEN Xianfu, JI Xinghong, et al. Preparation of Al₂O₃@TiO₂ biological composite support and adsorption of bovine serum albumin[J]. CIESC Journal, 2014, (5). DOI: 10.3969/j.issn.0438-1157.2014.05.052. DOI：

摘要

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21.8 mm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20 mm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。

Abstract

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 21.8 mm 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 Al2O3 support. BSA adsorption performance indicated that the adsorption capacity of 20 mm 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.

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