化工进展 ›› 2016, Vol. 35 ›› Issue (05): 1484-1489.DOI: 10.16085/j.issn.1000-6613.2016.05.032

• 材料科学与技术 • 上一篇    下一篇

TiO2/羟基磷灰石复合微球的合成

那驰, 董如林, 张汉平, 陈智栋, 金长春, 王芳   

  1. 常州大学石油化工学院, 江苏 常州 213164
  • 收稿日期:2015-07-15 修回日期:2015-12-02 出版日期:2016-05-05 发布日期:2016-05-05
  • 通讯作者: 董如林,研究员,主要从事无机功能材料及复合材料的研究。E-mail dongrl@cczu.edu.cn。
  • 作者简介:那驰(1990-),男,硕士研究生。
  • 基金资助:

    国家自然科学基金项目(51273027)。

Synthesis of TiO2/hydroxyapatite composite microspheres

NA Chi, DONG Rulin, ZHANG Hanping, CHEN Zhidong, JIN Changchun, WANG Fang   

  1. School of Petrochemical Engineering, Changzhou University, Changzhou 213164, Jiangsu, China
  • Received:2015-07-15 Revised:2015-12-02 Online:2016-05-05 Published:2016-05-05

摘要: 将乙酰丙酮稳定的钛酸四正丁酯分散到含有硬脂酸的水中,接着加入Ca2+、H2PO4-源,然后通过150℃的水热过程,合成了TiO2/羟基磷灰石(HAP)复合微球。其中的硬脂酸作为界面媒介吸附Ca2+,确保生成的羟基磷灰石的粒子吸附在分散的钛酸四正丁酯球形"油滴"表面。经水热过程,分散的油滴转化为TiO2 为内核,HAP为壳层的复合微球。HAP粒子组成的微球外壳层对内核钛酸四正丁酯水解及缩聚反应而引起的体积收缩产生抑制作用,从而对最终的TiO2 内核的微结构产生影响。亚甲基蓝的紫外光催化降解实验结果表明,复合微球的光催化性能与微球对亚甲基蓝的平衡吸附量有密切的关系,并取决于产品的微结构。当复合微球中羟基磷灰石的理论质量分数为1%~1.5%时,微球对亚甲基蓝显示了较高的光催化降解效率。

关键词: 二氧化钛, 羟基磷灰石, 水热, 水解, 吸附, 降解

Abstract: Titanium dioxide/hydroxyapatite (HAP) composite microspheres were synthesized by dispersing acetylacetone-stabilized tetra-n-butyltitanate in water containing stearic acid, then adding Ca2+and H2PO4- sources, and finally employing a hydrothermal process at 150℃. Stearic acid was used as interface intermediary to adsorb Ca2+ and ensure the adsorption of subsequently formed hydroxyapatile particles on the surface oftetra-n-butyltitanate "oil droplets". The dispersed droplets transformed into composite microspheres with TiO2 core and HAP shell after hydrothermal process. The shell consisting of HAP particles suppressed the volume shrinkage of the core induced by the hydrolysis and condensation reaction of tetra-n-butyltitanate under hydrothermal condition, and therefore influenced the microstructure of final TiO2core. The result of the degradation of methylene blue under UV light irradiation indicated that the photocatalytic property of the composite microspheres was closely related to the equilibrium adsorption capacity for methylene blue, and simultaneously depended on the microstructure of composite microspheres. The composite spheres showed fairly high photocatalytic efficiency for degrading methylene blue when the theoretical hydroxyapatite mass fraction was controlled at 1%-1.5%.

Key words: titanium dioxide, hydroxyapatite, hydrothermal, hydrolysis, adsorption, degradation

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