fulltext.study @t Gmail

Optimization synthesis of carbon nanotubes-anatase TiO2 composite photocatalyst by response surface methodology for photocatalytic degradation of gaseous styrene

Paper ID Volume ID Publish Year Pages File Format Full-Text
46123 46430 2012 9 PDF Available
Title
Optimization synthesis of carbon nanotubes-anatase TiO2 composite photocatalyst by response surface methodology for photocatalytic degradation of gaseous styrene
Abstract

In present study, the center composite design in response surface methodology (RSM) was firstly applied to optimize the synthesis of multi-wall carbon nanotubes (MWCNTs)–TiO2 composite photocatalyst. Twenty-eight composite photocatalysts were prepared by adjusting four operating parameters (amount of MWCNTs, amount of TiF4, hydrothermal temperature and hydrothermal time) at five levels by the method of multiple variable analysis. The structural, optical and morphological properties of the prepared composite photocatalysts were characterized by X-ray diffraction, UV–visible absorption spectra and scanning electron microscopy, respectively. Based on the experimental design, a semi-empirical expression was firstly established and subsequently applied to predict the photocatalytic degradation activity of the prepared composite photocatalysts to gaseous styrene in a cubic flow-through reactor. The results showed that the experimental photocatalytic degradation efficiencies using the differently prepared MWCNTs–TiO2 composite photocatalysts matched with the theoretically predicted values very well with a high correlation (R2 = 0.9790). Based on the theoretical and experimental results, the optimum synthesis parameters for the composite photocatalyst within the experimental ranges were 0.01 g MWCNTs, 0.14 g TiF4, and 120 °C hydrothermally treated for 87.2 h. The photocatalytic degradation efficiency of gaseous styrene using the MWCNTs–TiO2 composite photocatalyst synthesized under the optimum parameters reached 74.4%. All these demonstrates that the experimental design and theoretical prediction methods used in this work would have great significance in designing and developing high performance photocatalysts for environmental remediation and solar energy conversion.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights▸ MWCNTs–TiO2 composites were prepared by the method of multiple variable analysis. ▸ Photocatalytic degradation efficiency was obtained for gaseous styrene degradation. ▸ Optimum synthesis parameters were predicted by center composite design based on RSM.

Keywords
MWCNTs based composite photocatalyst; Optimization synthesis; Center composite design; Photocatalytic degradation; Gaseous styrene
First Page Preview
Optimization synthesis of carbon nanotubes-anatase TiO2 composite photocatalyst by response surface methodology for photocatalytic degradation of gaseous styrene
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 B: Environmental - Volumes 123–124, 23 July 2012, Pages 69–77
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