| Title |
Biomaterials & Nanomaterials ; Synthesis and Visible Light Photocatalytic Activity of Nanocrystalline Ti02-SrO Composite Powders |
| Authors |
최성민(Sung Min Choi); 이병택(Byong Taek Lee); 홍원석(Won Seok Hong); 한재길(Jae Kil Han) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
nanoparticle; photoactivity; sol-gel method |
| Abstract |
Nano-sized and homogeneously distributed TiO2-20, -40, -60wt% SrO composite powders were successfully synthesized by a sol-gel method. The as-received amorphous TiO2-20wt% SrO composite powders were crystallized with anatase TiO2 at around 750℃. As calcination temperatures increased, the anatase TiO2 crystalline phase was transformed to rutile TiO2 at about 900℃, whereas nano-sized, squarish SrTiO3 phase was detected. The peaks obtained after calcining at 1,050℃ mainly exhibited the rutile TiO2 and SrTiO3 phases. However, a small number of SrO2 peaks were also detected. For the comparison of photocatalytic activity depending on light sources, TiO2-SrO composite powders were tested in phenol degradation. TiO2-60wt%SrO composite powder showed good visible light photoactivity for the photo-oxidation of phenol. |