1. Europium Complex Incorporated Mesoporous Silica for a Potential pH Sensor
- Author
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Il Kim, Chang-Sik Ha, Yuin Jung, Sung Soo Park, and Booyoun An
- Subjects
Materials science ,Aqueous solution ,Small-angle X-ray scattering ,Inorganic chemistry ,chemistry.chemical_element ,General Chemistry ,Mesoporous silica ,Condensed Matter Physics ,Tetraethyl orthosilicate ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Desorption ,Copolymer ,General Materials Science ,Mesoporous material ,Europium - Abstract
Highly ordered mesoporous silica, SBA-15 was synthesized using triblock copolymer (P123) as template and tetraethyl orthosilicate (TEOS) as silica source. Through the post-synthesis treatment, pore surface of the mesoporous silica was modified with aminosilane and then Eu3+ ions were incorporated in the modified mesoporous silica for the formation of Eu complex. Mesoporous silica with the hexagonal mesostructure was characterized by small angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). The successful modification of the mesoporous silica was verified by FT-IR spectra and nitrogen adsorption/desorption isotherms. Eu incorporated mesoporous silicas showed different photoluminescent intensities depending on the pH of acidic and basic aqueous solutions.
- Published
- 2008
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