Ternary europium complex with dibenzoylmethane(DBM)and 1,10phenanthroline(phen)was insitu synthesized in thin SiO2/polyvinyl butyral(PVB)hybrid films by a twostep solgel process and characterized by means of fluoresce...Ternary europium complex with dibenzoylmethane(DBM)and 1,10phenanthroline(phen)was insitu synthesized in thin SiO2/polyvinyl butyral(PVB)hybrid films by a twostep solgel process and characterized by means of fluorescence spectroscopy.The luminescence spectra,fluorescence lifetimes and photostability were all investigated.The results showed that the hybrid films exhibited the characteristic emission bands of the central rare earth Eu3+.In addition,Eu3+presented longer fluorescence lifetime than in an ethanol solution and the complex had a higher photostability in the hybrid film than in the PVB film containing the corresponding pure complex.展开更多
In this study,a novel solgel method has been developed to prepare LiTi2(PO4)3 lithium ion conductor as monophase at relatively low temperature(600).According to the XRD and IR analysis,the asprepared sample remained a...In this study,a novel solgel method has been developed to prepare LiTi2(PO4)3 lithium ion conductor as monophase at relatively low temperature(600).According to the XRD and IR analysis,the asprepared sample remained an amorphous state up to 500.The activation energy was calculated to be 252 kJ/mol according to the modified Kissinger equation.展开更多
Silica gel powders,with particle diameter in the range 10 to 20 nm,were prepared from water glass using ethyl acetate as a latent acid reagent. The products were characterized by TGDTA, TEM, FTIR, BET and some other ...Silica gel powders,with particle diameter in the range 10 to 20 nm,were prepared from water glass using ethyl acetate as a latent acid reagent. The products were characterized by TGDTA, TEM, FTIR, BET and some other experiment methods. The process of silica solgel formation and the thermal behavior as well as phase change of the silica powders during heattreating process were studied, and the effect of heattreating temperature on the specific surface area and apparent density of the silica powders was investigated.展开更多
文摘Ternary europium complex with dibenzoylmethane(DBM)and 1,10phenanthroline(phen)was insitu synthesized in thin SiO2/polyvinyl butyral(PVB)hybrid films by a twostep solgel process and characterized by means of fluorescence spectroscopy.The luminescence spectra,fluorescence lifetimes and photostability were all investigated.The results showed that the hybrid films exhibited the characteristic emission bands of the central rare earth Eu3+.In addition,Eu3+presented longer fluorescence lifetime than in an ethanol solution and the complex had a higher photostability in the hybrid film than in the PVB film containing the corresponding pure complex.
文摘In this study,a novel solgel method has been developed to prepare LiTi2(PO4)3 lithium ion conductor as monophase at relatively low temperature(600).According to the XRD and IR analysis,the asprepared sample remained an amorphous state up to 500.The activation energy was calculated to be 252 kJ/mol according to the modified Kissinger equation.
文摘Silica gel powders,with particle diameter in the range 10 to 20 nm,were prepared from water glass using ethyl acetate as a latent acid reagent. The products were characterized by TGDTA, TEM, FTIR, BET and some other experiment methods. The process of silica solgel formation and the thermal behavior as well as phase change of the silica powders during heattreating process were studied, and the effect of heattreating temperature on the specific surface area and apparent density of the silica powders was investigated.
