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Correlating the visible light photoactivity of N-doped TiO2 with brookite particle size and bridged-nitro surface species

Paper ID Volume ID Publish Year Pages File Format Full-Text
50961 46824 2012 7 PDF Available
Title
Correlating the visible light photoactivity of N-doped TiO2 with brookite particle size and bridged-nitro surface species
Abstract

Visible light N-doped TiO2 photocatalysts were obtained by sol–gel method, in CH3COOH and/or HNO3 media, followed by rapid calcination. The photocatalysts were characterized by XRD, BET, DRS, XPS, FT-IR, Raman, TEM, and nonmetal elemental analysis. The visible light activity of these materials was evaluated using phenol as a model pollutant. The obtained N-doped TiO2 contained anatase (91.4–100%; dA = 6.5–14 nm) and brookite (0–8.6%; dB = 6.1–14.9 nm). The observed decomposition rates were dependent by the brookite particle size and the presence of bridged-nitro surface species. The best performing material was 3.2 times more active than the nitrogen doped reference commercial photocatalyst (TP-S201).

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Efficient visible light active photocatalysts via sol–gel and rapid calcination. ► The particle size of brookite determines the photocatalytic performance. ► Bridged nitro groups are responsible for high VIS activity at short calcination times. ► Traditional calcination eliminates the bridged nitro groups.

Keywords
Nitrogen doped titania; Acetic acid; Nitric acid; Brookite; Rapid crystallization; Bridged-nitro group
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Correlating the visible light photoactivity of N-doped TiO2 with brookite particle size and bridged-nitro surface species
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 17, 5 January 2012, Pages 1–7
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us