Rare-earth metal oxide doped transparent mesoporous silica plates under non-aqueous condition as a potential UV sensor.
Transparent mesoporous silica plates doped with rare-earth metal oxide were prepared using solvent-evaporation method based on the self-organization between structure-directing agent and silicate in a non-aqueous solvent. A triblock copolymer, Pluronic (F127 or P123), was used as the structure-directing agent, while tetraethyl orthosilicate (TEOS) was used as a silica source. The pore diameter and the surface area of the mesoporous silica plate prepared with the optimized conditions were ca 40 A and 600 m2 g(-1), respectively, for both structure-directing agent. Rare-earth metal oxides (Eu, Tb, Tm oxide) in mesochannel were formed via one-step synthetic route based on the preparation method of a silica plate. Optical properties of rare-earth metal oxide-doped mesoporous silica plates were investigated by UV irradiation and photoluminescence (PL) spectroscopy. Under the exitation wavelength of 254 nm, the doped mesoporous silica plates emitted red, green and blue for Eu, Tb and Tm oxides, respectively. Rare-earth metal oxide-doped mesoporous silica plates showed enhanced PL intensity compared to that of the bulk rare-earth metal oxide.
Department of Polymer Science and Engineering, Pusan National University, Busan 609-735, South Korea.
Sang-Joon
SJ
Lee
Sung Soo
SS
Park
Sang Hyun
SH
Lee
Sang-Hyun
SH
Hong
Chang-Sik
CS
Ha
D004867:Equipment Design; D019544:Equipment Failure Analysis; D008163:Luminescent Measurements / Q000295:instrumentation*; D008674:Metals, Rare Earth / Q000737:chemistry* / Q000528:radiation effects; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure; D010087:Oxides / Q000737:chemistry / Q000528:radiation effects; D010316:Particle Size; D011829:Radiation Dosage; D011874:Radiometry / Q000295:instrumentation*; D012822:Silicon Dioxide / Q000737:chemistry*; D014159:Transducers; D014466:Ultraviolet Rays; D014867:Water / Q000737:chemistry
D008674:Metals, Rare Earth; D010087:Oxides; D014867:Water; D012822:Silicon Dioxide