Tsai, Cheng YenCheng YenTsaiHSING-CHENG HSI2019-09-262019-09-262009-11-269781439817827https://scholars.lib.ntu.edu.tw/handle/123456789/425179TiO 2 photocatalyst has been shown to effectively decompose various pollutants in gaseous or aqueous phases. The major defect of TiO 2 , however, appears to be the large band-gap energy of 3.2 eV that makes the TiO 2 only being excited by UV light. Furthermore, the manufacturing process of TiO 2 strongly influences the purity and surface properties of resulting nanopartieles which subsequently affect the characteristics of TiO 2 photocatalytie reactions. Therefore, there is a need to produce visible-light photocatalyst via novel processes. In this study, nitrogen-doped TiO 2 (i.e., TiO 2-X N X ) nanopowders, which have been recognized as effective photocatalysts for band gap narrowing, were synthesized using a transferred IDC plasma torch as the heating source. The TiO 2-X N X nanopowdcrs were formed via a single-step thermal process. The formed TiO 2-X N X samples were characterized with TEM, XRD and UV-Vis. The experimental results indicated that the formed TiO 2-X N X nanopowdcrs had a particle size within 5-20 nm. Furthermore, the formed nanopowdcrs were a mixture of the anatase and rutile phase. An evident red-shift in wavelength absorption was also observed. These results revealed that the proposed thermal plasma method successfully fabricated N-dopcd TiO 2 in a single-step process.Evaporation condensation | Nitrogen doped | Plasma torch | Titanium dioxideconference paper2-s2.0-70450202468https://api.elsevier.com/content/abstract/scopus_id/70450202468