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| Type |
Poster Presentation |
| Area |
Material Chemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
MAT.P-372 |
| Subject |
Layered rare earth hydroxide films to monitor Heavy Metal ions in Water |
| Authors |
Hyunsub Kim, Song-ho Byeon*
Department of Applied Chemistry, Kyung Hee University, Korea
|
| Abstract |
Layered rare earth hydroxides (LRHs) of the general formula RE2(OH)5X∙nH2O (RE = rare earths, X = interlayer anions), composed of alternately stacked [RE2(OH)5∙nH2O]+ rare earth hydroxocation layers and X− anion layers, are an emerging class of materials with a wide range of potential applications. As is generally accepted, LRHs would find much more diverse application fields if they are prepared as a (thin) film. Recently, a number of methods and procedures have been developed for the deposition of inorganic thin films at low temperature in aqueous solutions. In contrast to conventional ways using powders which are difficult to handle, these aqueous processes can readily immobilize to prevent powders from aggregation. In this study, chemical bath deposition (CBD) technique was employed to deposit LRHs films (RE = Y, Gd, Dy, Ho, Er, Tb, Eu) on glass substrates. Thin LRH films oriented perpendicular to the surface with microscale thickness were coated on glass substrates by hexamethylenetetramine hydrolysis reaction at 60-80°C for 12h. XRD measurements and FE-SEM images confirmed successful deposition of single phase films with controlled orientation. This promising deposition approach was adopted to apply LRHs for the detection sensors of some oxoanions containing heavy metals such as Cr and W. Tb-doped LYH films deposited on glass tubes and pipes were demonstrated to monitor the presence of these ions in water by using “luminescence-on/off” characteristics accompanying the adsorption and energy transfer/luminescence quenching. |
| E-mail |
henson4296@gmail.com |
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121st General Meeting of the KCS