Development of photocatalytic TiO2 nanofibers by electrospinning and its application to degradation of dye pollutants.
We have developed photocatalytic TiO2 nanofibers for the treatment of organic pollutants by using electrospinning method. We found that the optimized electrospinning conditions (electric field and flow rate) were 0.9 kV cm(-1) and 50 microL min(-1). After annealing at 550 degrees C for 30 min, we fabricated TiO2 nanofibers (average 236 nm thick) with anatase crystalline phase. To increase photocatalytic activity and effective surface area, we coated photocatalytic TiO2 particles on the TiO2 nanofibers by using sol-gel method. The degradation rate (k'=85.4x10(-4) min(-1)) of composite TiO2 was significantly higher than that (15.7x10(-4) min(-1)) of TiO2 nanofibers and that (14.3x10(-4) min(-1)) of TiO2 nanoparticles by the sol-gel method. Therefore, we suggested that the composite TiO2 of nanofibers and nanoparticles be suitable for the degradation of organic pollutants.
Doh
Seok Joo
SJ
Advanced Nano Materials Research Team, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 704-230, South Korea. sjdoh@dgist.ac.kr
Kim
Cham
C
Lee
Se Geun
SG
Lee
Sung Jun
SJ
Kim
Hoyoung
H
D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry / Q000528:radiation effects; D049329:Nanostructures / Q000737:chemistry*; D010777:Photochemistry; D012394:Rosaniline Dyes / Q000737:chemistry / Q000528:radiation effects; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000528:radiation effects; D018508:Water Purification / Q000379:methods*
D004396:Coloring Agents; D012394:Rosaniline Dyes; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D014025:Titanium; C009662:Victoria blue B