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Fabrication of high‐efficiency anatase TiO 2 photocatalysts using electrospinning with ultra‐violet treatment
Author(s) -
Song ChanGeun,
Won Jonghan,
Jang Inhoon,
Choi Hyeunseok
Publication year - 2021
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17842
Subject(s) - anatase , electrospinning , materials science , photocatalysis , nanofiber , chemical engineering , crystallinity , rutile , fabrication , oxide , nanotechnology , polymer , composite material , catalysis , chemistry , organic chemistry , metallurgy , medicine , alternative medicine , pathology , engineering
In metal oxide nanofiber fabrication using the electrospinning method, heat treatment is performed at temperatures of 500°C or higher for crystallization and polymer desorption. Therefore, it is difficult to fabricate low‐temperature phase metal oxides that crystallize at low temperatures. TiO 2 , a representative metal oxide often used as photocatalysts, is known to have higher photocatalytic activity in the low‐temperature phase (anatase structure) than in the high‐temperature phase (rutile structure). Studies on the fabrication of TiO 2 anatase nanofibers using conventional electrospinning have reported disadvantages such as the partial expression of rutile structures and low crystallinity. This study developed an anatase TiO 2 nanofiber as a high‐efficiency catalyst based on the electrospinning method and a residual organic matter cleaning method that employs ultra‐violet (UV) light. We fabricated nanofibers using the electrospinning method and implemented TiO 2 nanofibers with the anatase structure through heat treatment at 260°C. Residual organics remaining after heat treatment of the fabricated crystalized TiO 2 nanofibers were removed by exposing them to UV light, thereby improving photocatalytic efficiency. The photocatalytic efficiency of the fabricated TiO 2 nanofibers was confirmed through a methylene blue (MB) decomposition experiment under visible light irradiation. The photocatalytic efficiency (time taken for the concentration of the MB solution to reach 50%) of the UV‐treated TiO 2 nanofibers was approximately six times higher than of P25 and the heat‐treated nanofibers.