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One-pot template synthesis of Ti–Al-containing mesoporous silicas and their application as potential photocatalytic degradation of chlorophenols

Paper ID Volume ID Publish Year Pages File Format Full-Text
46888 46452 2011 11 PDF Available
Title
One-pot template synthesis of Ti–Al-containing mesoporous silicas and their application as potential photocatalytic degradation of chlorophenols
Abstract

This article presents preparation, characterization and evaluation of heterogeneous Titanium based alumina mesoporous silica catalysts for the photo degradation of chlorophenols in aqueous solution. For more economic application, a series of silica, Al2O3–SiO2 and TiO2–Al2O3–SiO2 are prepared using linear alkylbenzene sulfonic acid as a novel structure directing agent. Two Ti–Al–SiO2 samples were prepared by direct synthesis using different titanium sources. The prepared samples are characterized by combination of various physicochemical techniques, such as XRD, N2 physisorption, FT-IR, UV–vis, SEM and TEM. The prepared mesoporous materials are applied in the presence of UV irradiation for photodegradation of chlorophenols as pollutants in water. The results reveal that the photodegradation process of 4-chlorophenol (4-CP) is completed within 40 min, while reach 67.3% for 2-chlorophenol (2-CP) within 130 min. Moreover, the titanium precursor species and the catalyst dosage (0.1–0.4 g/l) affect the photocatalytic activity of prepared catalysts for 2-chlorophenol degradation. Finally, the concentration of acetate and chloride ions formed during the degradation process can also affect the activity of the prepared catalysts.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A new mesoporous material of Ti–Al–SiO2 was prepared by the direct method using economic anionic surfactants, linear alkylbenzene sulfonic acid. ► The catalyst exhibited efficient activity for the degradation of 2- and 4-chlorophenol under UV irradiation. ► The photodegradation process of 4-CP is completed within 40 min, while reach 67.3% for 2-CP within 130 min.

Keywords
Nanocomposite; Mesoporous silica; Linear alkylbenzene; Photodegradation; Chlorophenol
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One-pot template synthesis of Ti–Al-containing mesoporous silicas and their application as potential photocatalytic degradation of chlorophenols
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 107, Issues 3–4, 21 September 2011, Pages 316–326
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