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Preparation of ORMOSIL particles with controlled amounts of binary organic functional groups and their application to colorimetric sensors for cadmium ion

Title
Preparation of ORMOSIL particles with controlled amounts of binary organic functional groups and their application to colorimetric sensors for cadmium ion
Author
구상만
Keywords
Binary ORMOSIL particles; Organic functional groups; Colorimetric sensor; Cadmium ion
Issue Date
2015-12
Publisher
KOREAN ASSOC CRYSTAL GROWTH
Citation
JOURNAL OF CERAMIC PROCESSING RESEARCH, v. 16, NO 5, Page. 635-642
Abstract
Binary functional ORMOSIL particles were prepared by the one pot process using organosilane mixtures of mercaptopropyltrimethoxysilanes and vinyltrimethoxysilanes. Colorimetric cadmium ion sensors were then prepared by immobilizing alpha, beta,gamma,delta-tetrakis(1-methylpyridinium-4-yl) porphine-p-toluenesulfonate molecules in ORMOSIL particles containing a controllable amount of mercaptopropylsilanes that served as binding sites. The relative amount of mercaptopropyl and vinyl functionalities in particles were controlled by adjusting molar ratios of organosilanes and thereby the amount of immobilized TMPyP molecules was easily controlled, which allowed a facile control of the detection range and sensitivity toward Cd ion detection. A particle sensor grid capable of colorimetric detection of Cd ions in a concentration range from 10 ppb to 5 ppm was constructed by combining three cadmium sensors with a different amount of mercaptopropylsilanes and showed distinctive visible color changes in a different concentration range of cadmium ions. Recycled sensor particles exhibited almost the same sensing performance as freshly prepared ones.
URI
http://jcpr.kbs-lab.co.kr/file/JCPR_vol.16_2015/JCPR16-5/_362015-175_635-642.pdfhttp://jcpr.kbs-lab.co.kr/thesis/online_2.php?cate_idx=14&sub_cate_idx=72http://hdl.handle.net/20.500.11754/29609
ISSN
1229-9162
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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