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Effect of chemical etching by sulfuric acid or H2O2–NH3 mixed solution on the photocatalytic activity of rutile TiO2 nanorods

Paper ID Volume ID Publish Year Pages File Format Full-Text
41854 45902 2010 7 PDF Available
Title
Effect of chemical etching by sulfuric acid or H2O2–NH3 mixed solution on the photocatalytic activity of rutile TiO2 nanorods
Abstract

Rutile TiO2 nanorods synthesized by hydrothermal treatment were etched by addition of H2O2–NH3 or H2SO4 solution. The etched rutile TiO2 nanorods were characterized by TEM, SEM, XRD, and specific surface area measurements. New crystal faces were generated on rutile TiO2 nanorods by means of chemical etching. In the case of treatment with H2O2–NH3 solution, the shape of the rutile TiO2 nanorod changed to a sepal-like structure with reaction time. The dissolution of rutile TiO2 nanorod mainly proceeded along [0 0 1] direction. When treated with sulfuric acid, the end [(1 1 1) face] of the rutile TiO2 nanorod was gradually etched. The rutile TiO2 nanorod finally exposed (0 0 1) and (0 2 1) faces during prolonged treatment time. In both cases, rutile TiO2 nanorods were differently etched. The etched rutile TiO2 nanorod showed higher photocatalytic activity for degradation of toluene in gas phase than the original particles.

Graphical abstractRutile TiO2 nanorods synthesized by hydrothermal treatment were etched by addition of H2O2–NH3 or H2SO4 solution. New crystal faces were generated on rutile TiO2 nanorods by means of chemical etching. When treated with sulfuric acid, the end [(1 1 1) face] of the rutile TiO2 nanorod was gradually etched. The rutile TiO2 nanorod finally exposed (0 0 1) and (0 2 1) faces during prolonged treatment time.Figure optionsDownload full-size imageDownload high-quality image (42 K)Download as PowerPoint slide

Keywords
Chemical etching; Photocatalyst; Rutile TiO2; Exposed crystal face; Photocatalytic activity
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Effect of chemical etching by sulfuric acid or H2O2–NH3 mixed solution on the photocatalytic activity of rutile TiO2 nanorods
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 380, Issues 1–2, 31 May 2010, Pages 48–54
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