Naofumi Uekawa   Miki Suzuki   Takahiro Ohmiya   Fumihiko Mori   Yong Jun Wu   Kazuyuki Kakegawa   
Journal of Materials Research 18(4) 797-803 2003年
Ti-peroxy compound was synthesized from Ti(O-iPr)4 and H2O2. Anatase and rutile TiO2 nanoparticles were prepared by heating the Ti-peroxy compound diluted with a polyol aqueous solution at 368 K for 24 h. In this research, ethylene glycol, glyceri...
N Uekawa   N Mochizuki   J Kajiwara   F Mori   YJ Wu   K Kakegawa   
PHYSICAL CHEMISTRY CHEMICAL PHYSICS 5(7) 1489-1489 2003年
Zinc oxide (ZnO) nanoparticles were obtained by firing the zinc peroxide nanoparticles at more than 473 K for 2 h. The zinc peroxide decomposed at 473 K to form ZnO that contained O22- ions. Furthermore, the ZnO nanoparticles without O22- ions wer...
Naofumi Uekawa   Masayuki Ueta   Yong Jun Wu   Kazuyuki Kakegawa   
Chemistry Letters (8) 854-855 2002年8月
CeO2(IV) fine particles were prepared by heating a polyethylene glycol solution of Ce(NO3)3·6H2O at 383 K for 3 h. When a polyethylene glycol whose molecular weight was 7500 or 20000 was used for the preparation, the obtained CeO2 particles were a...
N Uekawa   J Kajiwara   K Kakegawa   Y Sasaki   
JOURNAL OF COLLOID AND INTERFACE SCIENCE 250(2) 285-290 2002年6月
An ethanol solution of Ti-peroxy compounds was prepared from the ethanol solution of titanium isopropoxide (Ti(O-iPr)(4)) and H2O2. Heating of the ethanol solution of the Ti-peroxy compounds at 348 K formed a Ti-peroxy gel, and heat treatment of t...
N Uekawa   J Kajiwara   K Kakegawa   Y Sasaki   
JOURNAL OF COLLOID AND INTERFACE SCIENCE 250(2) 285-290 2002年6月
An ethanol solution of Ti-peroxy compounds was prepared from the ethanol solution of titanium isopropoxide (Ti(O-iPr)(4)) and H2O2. Heating of the ethanol solution of the Ti-peroxy compounds at 348 K formed a Ti-peroxy gel, and heat treatment of t...