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Synthesis and characterization of B-doped TiO2 and their performance for the degradation of metoprolol

Paper ID Volume ID Publish Year Pages File Format Full-Text
53846 46987 2015 8 PDF Available
Title
Synthesis and characterization of B-doped TiO2 and their performance for the degradation of metoprolol
Abstract

•TiO2 pure and B-doped TiO2, with different weight content of boron (0–9%, w/w), were synthesized by sol–gel method.•Activities of B-doped TiO2 catalysts were tested in MET degradation in a solar simulator with a xenon lamp (photon flux = 2.99 × 10−6 Einstein s−1).•The photocatalytic activity of TiO2 improved from 48% to 70% by doping with 5% B.•Physical and chemical changes play important roles in photodegradation reaction.•The Egap value of the catalyst doped with 5% B was similar to the pure TiO2.

Pure and B-doped TiO2 photocatalysts were synthesized by sol–gel method. Boric acid was used as boron source and titanium tetra-isopropoxide as TiO2 precursor. Nominal boron/titania proportions were in the range 0–9% (w/w). The powder was characterized by X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM and TEM), UV–vis absorption spectra, BET specific surface area, X-ray photoelectron spectroscopy (XPS) and zeta potential.The β-blockers are pharmaceuticals frequently detected in waters. Among these β-blockers, metoprolol (MET) is one of the most commonly used for the treatment of a variety of cardiovascular diseases, thus being necessary the search for methods able to remove it. In this context, the photocatalytic reactivity of the synthesized catalysts was evaluated by its use in MET photodegradation using a solar simulator with xenon lamp as irradiation source. Results showed that the 5% (w/w) B-doped TiO2 exhibited greater photodegradation (70% MET removal) than pure TiO2 (48% MET removal). Some factors were responsible for the photocatalytic performance of B-doped TiO2 which include the high surface area, mesoporous structure, anatase–rutile crystalline structure, formation of Ti(III), introduction of boron as a B–O–Ti species and uniformity in particles surface size.

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Keywords
Photocatalysis; Sol–gel method; TiO2-B; Metoprolol
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Synthesis and characterization of B-doped TiO2 and their performance for the degradation of metoprolol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 252, 1 September 2015, Pages 27–34
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
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Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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