Anti-microbial active composite nanoparticles with magnetic core and photocatalytic shell:: TiO2-NiFe2O4 biomaterial system
Anti-microbial active composite nanoparticles with magnetic core and photocatalytic shell:: TiO2-NiFe2O4 biomaterial system
复制标题
DOI：
10.1016/j.actbio.2005.07.007
复制
发表时间：
2005-11-01
影响因子：
9.7
通讯作者：
Misra, RDK
中科院分区：
文献类型：
--
作者：
Rana, S;Rawat, J;Misra, RDK
反胶束技术和化学水解技术已经成功地合成了由二氧化钛光催化壳和铁氧体镍磁芯组成的复合纳米颗粒。钛壳的性质，即锐钛矿或板钛矿，取决于TiO2和NiFe2O4的摩尔比。本文描述了复合纳米颗粒的光催化和抗微生物活性以及镍铁氧体磁芯的磁性特征。二氧化钛包覆的NiFe2O4纳米颗粒保留了未包覆的纳米晶镍铁氧体的磁性特征（超顺磁性，在300k时没有迟滞、剩余物和矫顽力），这鼓励了它们作为可移除的抗微生物光催化剂纳米颗粒的应用，可以在暴露后从喷涂表面（人体或环境）中提取。(c) 2005材料学报Elsevier Ltd.出版。版权所有。
Reverse micelle and chemical hydrolysis techniques have been successfully combined to synthesize composite nanoparticles consisting of a photocatalytic shell of titania and a magnetic core of nickel ferrite. The nature of titania shell, i.e. anatase or brookite, depends on the TiO2 and NiFe2O4 molar ratio. The work presented here describes the photocatalytic and anti-microbial activity of the composite nanoparticles together with the magnetic characteristics of the nickel ferrite core. The TiO2-coated NiFe2O4 nanoparticles retain the magnetic characteristics of uncoated nanocrystalline nickel ferrites (superparamagnetism; absence of hysteresis, remanence and coercivity at 300 K) encouraging their application as removable anti-microbial photocatalyst nanoparticles that can be extracted from the sprayed surface (human body or environment) after exposure. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.