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Naik Brundabana
나노물질 및 화학반응 연구단
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Enhanced H2 Generation of Au-Loaded, Nitrogen-Doped TiO2 Hierarchical Nanostructures under Visible Light

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Title
Enhanced H2 Generation of Au-Loaded, Nitrogen-Doped TiO2 Hierarchical Nanostructures under Visible Light
Author(s)
Brundabana Naik; Sun Mi Kim; Chan-Ho Jung; Song Yi Moon; Sang Hoon Kim; Jeong Young Park
Publication Date
2014-02
Journal
ADVANCED MATERIALS INTERFACES, v.1, no.1, pp.1300018 -
Publisher
Wiley
Abstract
Hierarchical N-doped TiO 2 nanostructured catalysts with micro-, meso-, and macroporosity are synthesized by a facile self-formation route using ammonia and titanium isopropoxide precursor. UV.vis diffuse refl ectance spectra confi rm the red shift and band gap narrowing due to the doping of N species in the TiO 2 nanoporous catalyst. Hierarchical macroporosity with fi brous channel patterning is observed and well preserved even after calcination at 800 °C, indicating thermal stability, whereas micro- and mesoporosity are lost after calcination at 500 °C. The photocatalytic activity of hiearchical N doped TiO 2 catalysts loaded with Au is evaluated for H 2 production reaction in visible light. The enhanced photocatalytic activity is attributed to the combined synergetic effect of N doping for visible light absorption, micro- and mesoporosity for an increase of effective surface area and light harvestation, and hierarchical macroporous fi brous structure for multiple refl ection and effective charge transfer.
URI
https://pr.ibs.re.kr/handle/8788114/1533
ISSN
2196-7350
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
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