Achieving maximum photo-oxidation reactivity of Cs(0.68)Ti(1.83)O(4-x)N(x) photocatalysts through valence band fine-tuning

Liu, Gang, Niu, Ping, Wang, Lianzhou, Lu, Gao Qing (Max) and Cheng, Hui-Ming (2011) Achieving maximum photo-oxidation reactivity of Cs(0.68)Ti(1.83)O(4-x)N(x) photocatalysts through valence band fine-tuning. Catalysis Science & Technology, 1 2: 222-225.

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Author Liu, Gang
Niu, Ping
Wang, Lianzhou
Lu, Gao Qing (Max)
Cheng, Hui-Ming
Title Achieving maximum photo-oxidation reactivity of Cs(0.68)Ti(1.83)O(4-x)N(x) photocatalysts through valence band fine-tuning
Formatted title Achieving maximum photo-oxidation reactivity of Cs0.68Ti1.83O4−𝑥N𝑥 photocatalysts through valence band fine-tuning
Journal name Catalysis Science & Technology   Check publisher's open access policy
ISSN 2044-4753
2044-4761
Publication date 2011-05
Sub-type Article (original research)
DOI 10.1039/c0cy00029a
Volume 1
Issue 2
Start page 222
End page 225
Total pages 4
Place of publication Cambridge, U.K.
Publisher Royal Society of Chemistry
Collection year 2012
Language eng
Formatted abstract Does a wider absorption range of the photocatalyst always result in a higher photoreactivity? By investigating a set of Cs0.68Ti1.83O4−𝑥Nx (𝑥 = 0–0.31) photocatalysts with a continuously tuned absorption edge, we found that although the absorption edge of Cs0.68Ti1.83O4−𝑥Nx is gradually shifted to the low-energy region with the increase of the nitrogen dopant, the photoreactivity of the photocatalyst in terms of generating the OH radical does not correspondingly increase under the irradiation of monochromatic light of 254 nm and continuous spectrum of >300 nm. The fundamental mechanism of the anion dopant enhanced photocatalytic activity through the interplay of three key factors—absorbance, oxidative potential and mobility of charge carriers—is proposed to explain the observed photocatalytic activity change.
Keyword Nitrogen-doped TiO2
Visible-light
Titanium-dioxide
Photoactivity
Photoreactivity
Nanoparticles
Origin
Oxides
Water
Gap
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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