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Preparation of black sand-based magnetic photocatalysts for photocatalytic oxidation of aqueous phenol

Paper ID Volume ID Publish Year Pages File Format Full-Text
48103 46493 2009 8 PDF Available
Title
Preparation of black sand-based magnetic photocatalysts for photocatalytic oxidation of aqueous phenol
Abstract

A natural magnetic material, black sand, was used as cores to prepare a magnetic photocatalyst, which can be recovered using an external magnetic field. A surfactant-involved scheme was proposed to deposit a rough silica layer on the surface of black sand, which otherwise could not be coated with silica through a conventional scheme involving Stöber process. Titanium dioxide (TiO2) was deposited on the surface of the silica–black sand (Si/BS) through an impregnation process and a direct deposition process. The catalytic property of the resultant photocatalyst (Ti/Si/BS) was evaluated using the oxidation of aqueous phenol and exhibited less reactivity than Degussa P25 TiO2. The phenol removal efficiency showed a pH dependence, which was ascribed to pH effect on (a) the formation of *OH and (b) the electrostatic interaction between the photocatalyst and the substrate. The prepared photocatalyst is reusable despite slight deactivation caused by the mechanical loss of TiO2.

Keywords
Magnetic photocatalyst; Black sand; Titanium dioxide; Phenol; Silica coating
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Preparation of black sand-based magnetic photocatalysts for photocatalytic oxidation of aqueous phenol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 87, Issues 1–2, 16 March 2009, Pages 1–8
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
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Full-text PDF Download
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Any Questions? feel free to contact us