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A facile template-free synthesis of pH-responsive polyelectrolyte/amorphous TiO2 composite hollow microcapsules for photocatalysis

Title
A facile template-free synthesis of pH-responsive polyelectrolyte/amorphous TiO2 composite hollow microcapsules for photocatalysis
Author
서경도
Keywords
ENVIRONMENTAL APPLICATIONS; HYDROGEL MICROSPHERES; DRUG-DELIVERY; DEGRADATION; NANOPARTICLES
Issue Date
2015-06
Publisher
ROYAL SOC CHEMISTRY
Citation
RSC ADVANCES, v. 5, NO 73, Page. 59257-59262
Abstract
This paper presents a novel, facile method for fabricating pH-responsive inorganic/organic composite microspheres with hollow structures in the absence of a step for the removal of the core. Using polyelectrolyte (hydrogel) hollow microspheres without a need for further calcination and chemical etching, minimally cross-linked poly(methacrylic acid/ethylene glycol dimethacrylate/3-(trimethoxysilyl) propylmethacrylate), poly(MAA/EGDMA/TMSPM) [pMET] microspheres were prepared by a distillation-precipitation method. Once the pMET microspheres disperse in 2-propanol, the hollow structure is clearly observed and can be maintained more rigidly in a dry state after amorphous TiO2 (a-TiO2) is incorporated into the shell of a microsphere by a sol-gel method. The a-TiO2-incorporated pH-responsive pMET composite [pMET/TiO2] hollow microspheres were tested as a photocatalyst in acidic and neutral conditions. The photocatalytic performance of the hollow pMET/TiO2 composite microcapsules under neutral condition was better than that under acidic conditions due to their large active surface and strong adsorption ability against methylene blue (MB).
URI
http://pubs.rsc.org/en/Content/ArticleLanding/2015/RA/C5RA06231D#!divAbstracthttp://hdl.handle.net/20.500.11754/25198
ISSN
2046-2069
DOI
10.1039/c5ra06231d
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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