Coordination-Enabled One-Step Assembly of Ultrathin, Hybrid Microcapsules with Weak pH-Response

• DOI: 10.1021/acsami.5b01463
• Publication Date: 2015-04-21T18:10:53Z
• Authors: Chen Yang; Hong Wu; Xiao Yang; Jiafu Shi; Xiaoli Wang; Shaohua Zhang; Zhongyi Jiang
• Keywords: Tannic acid; Thermal Stability; Template

In this study, an ultrathin, hybrid microcapsule is prepared though coordination-enabled one-step assembly of tannic acid (TA) and titanium(IV) bis(ammonium lactate) dihydroxide (Ti-BALDH) upon a hard-templating method. Briefly, the PSS-doped CaCO3 microspheres with diameter 5–8 μm were synthesized utilized as sacrificial templates. Then, TA-TiIV coatings formed on surface templates through soaking in TA Ti-BALDH aqueous solutions under mild conditions. After removing template by EDTA treatment, microcapsules capsule wall thickness 15 ± 3 nm obtained. The strong coordination bond between polyphenol TiIV conferred high structural stability range pH values 3.0–11.0. Accordingly, enzyme-immobilized exhibited superior thermal stabilities. This study discloses formation that are suitable for use supports catalysis due to their extensive