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Novel method for preparation of high visible active N-doped TiO2 photocatalyst with its grinding in solvent

Paper ID Volume ID Publish Year Pages File Format Full-Text
48194 46496 2008 7 PDF Available
Title
Novel method for preparation of high visible active N-doped TiO2 photocatalyst with its grinding in solvent
Abstract

This work is focused on improvement on the photo-catalytic activity of a N-doped TiO2 (reference sample) by its grinding in solvent. Grinding the reference sample in solvent was performed by using a planetary mill at 200 rpm and 15 min grinding time with one of various solvents such as ethanol, ethyl acetate dehydrated (EAD), hexane and water. The ground samples were dried at 80 °C to remove the residual solvents. The prepared sample was characterized by a series of analytical methods including X-ray diffraction (XRD), specific surface area (SSA), particle size, Fourier transform infrared spectroscopy (FT-IR), thermogravimeter mass spectrometer (TG-MS), X-ray photoelectron spectroscopy (XPS), Chemiluminescence as well as the photo-catalytic activity with NO gas decomposition. The prepared sample ground in ethanol showed much improved photocatalytic activity in the wavelength of visible light region, in comparison with the activity of the reference sample. This may be due to the existence of abundant electrons on Ti3+/oxygen vacancy sites, which may be generated via current-doubling effect during the dry operation. On the contrary, the sample prepared in EAD showed the worsened photocatalytic activity in visible wavelength region, due to the existence of acetate complex on the surface of the sample as a surface impurity.

Keywords
Surface modification; Ethanol; Current-doubling effect; TiO2 photocatalyst; Grinding
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Novel method for preparation of high visible active N-doped TiO2 photocatalyst with its grinding in solvent
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 84, Issues 3–4, 1 December 2008, Pages 570–576
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