fulltext.study @t Gmail

Template-free synthesis and photocatalytic activity of hierarchical porous titania with controlled texture and crystalline structure

Paper ID Volume ID Publish Year Pages File Format Full-Text
41808 45900 2010 11 PDF Available
Title
Template-free synthesis and photocatalytic activity of hierarchical porous titania with controlled texture and crystalline structure
Abstract

Hierarchical porous titanium dioxide is of great interest as a potential photocatalyst material because of its enhanced mass transfer capability and light capture efficiency. Tuning of these nanostructures allows for the design of new photocatalysts with improved performance. In this study, we report the synthesis of hierarchically meso–macroporous TiO2 materials through a template-free aqueous technique. Controlled porous textures and crystalline structures of TiO2 were obtained by varying the pH of the starting aqueous solution and the method of crystallization. The catalytic efficiency of these materials was investigated using photodegradation of methyl orange and the results show that specific surface area, pore volume and crystallinity play a key role in the photocatalytic performance. The hierarchical titania prepared by the hydrothermal method at a pH of 2 has the highest efficiency with an apparent reaction rate of 9.10 × 10−2 min−1, surpassing that of Degussa P25, hence showing its promising potential in environmental remediation.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (148 K)Download as PowerPoint slideResearch highlights▶ Template-free hierarchical meso–macroporous titania materials were synthesized. ▶ Controlled porous textures and crystalline structures of titania were obtained. ▶ Greater photocatalytic activity than Degussa P25 in degradation of methyl orange. ▶ Surface area, pore volume and crystallinity play key roles in photodegradation. ▶ Hierarchical porous structure is beneficial to get better photocatalytic activity.

Keywords
Hierarchical porosity; Titanium dioxide; Photocatalysis; Methyl orange
First Page Preview
Template-free synthesis and photocatalytic activity of hierarchical porous titania with controlled texture and crystalline structure
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 387, Issues 1–2, 20 October 2010, Pages 231–241
Authors
, , , , , , ,
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