Articles - Photocatalytic activity of TiO2 nanomaterials
- Yo-Seung Songa, Siwon Sonb, Deuk Yong Leeb,*, Myung-Hyun Leec and Bae-Yeon Kimd
- a Department of Materials Engineering, Korea Aviation University, Goyang 10540, Korea b Department of Biomedical Engineering, Daelim University, Anyang 13916, Korea c Energy and Environmental Division, KICET, Jinju 52851, Korea d Department of Materials Science and Engineering, Incheon National University, Incheon 22012, Korea
Abstract
To investigate the effect of calcination temperature on crystal structure, phase, and photocatalytic activity of methylene blue(MB), TiO2 nanofibers were prepared through sol-gel derived electrospinning, calcination from 500 oC to 650 oC, andsubsequent mechanical grinding. XRD results indicated that TiO2 nanofibers calcined at 500 oC is composed of anatase TiO2 only. However, mixed crystals of anatase and rutile were observed for TiO2 calcined above 550 oC. Higher MB degradationwas observed for the TiO2 nanofibers calcined at 550 oC most likely due to the mixed crystals and large surface area. Enhanced photocatalytic activity was achieved for TiO2 and Nb-TiO2 nanotubes due to the synergic combinations of mixed crystals and larger specific surface area.
Keywords: TiO2, Nb-TiO2, Nanofiber, nanotube, Photocatalytic activity, Methylene blue
This Article
Copyright 2019 International Orgranization for Ceramic Processing. All rights reserved.Clean-Energy Research Institute(CRI), Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, Korea
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