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나노 구조 물리 연구단
나노구조물리 연구단
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Phase-selective modulation of TiO 2 for visible light-driven C–H arylation: Tuning of absorption and adsorptivity

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Title
Phase-selective modulation of TiO 2 for visible light-driven C–H arylation: Tuning of absorption and adsorptivity
Author(s)
Sora Bak; Sae Mi Lee; Hee Min Hwang; Hyoyoung Lee
Publication Date
2019-07
Journal
MOLECULAR CATALYSIS, v.471, no., pp.71 - 76
Publisher
ELSEVIER SCIENCE BV
Abstract
© 2019 Elsevier B.V. To understand and modify TiO 2 for organic photoreaction, two points are important: improving light absorption and retaining adsorption sites for organic reagents. Herein, we tuning the absorption and adsorption of TiO 2 by introducing the defects on each phase of TiO 2 , called phase-mixed structures of ordered anatase (OA) and disordered rutile (DR) (OA/DR P25) and disordered anatase (DA) and ordered rutile (OR) (DA/OR P25). Disordered structure of TiO 2 broadened the absorption wavelength range including visible light, but changed surface structure reduced the adsorptivity of organic reactant. Additionally, anatase and rutile phase of TiO 2 has different surface properties and energy band structure, so keeping the crystalline anatase surface for adsorption was important while introducing the TiO 2 . Thus, it is assumed that the phase combination of OA and DR can be the best photocatalytic structure of TiO 2 even without any supporting materials and/or co-catalysts. In fact, the arylation yield of OA/DR P25 is the highest (63.4%), compared to those of untreated P25 (40.0%) and DA/OR (20.1%), highlighting the potential of OA/DR P25 in various visible light-driven photocatalytic organic reactions
URI
https://pr.ibs.re.kr/handle/8788114/5965
ISSN
2468-8231
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
Files in This Item:
Phase-selective_Molecular Catalysis_Hyoyoung Lee.pdfDownload

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