Synthesis, Surface characterization and photocatalytic activity of TiO2 supported on almond shell activated carbon

Omri, Abdessalem; Lambert, Stéphanie; Geens, Jérémy; Bennour, Fetten; Ben Zina, Mourad

doi:10.1016/j.jmst.2014.04.007

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Synthesis, Surface characterization and photocatalytic activity of TiO2 supported on almond shell activated carbon

Omri, Abdessalem; Lambert, Stéphanie; Geens, Jérémy et al.

2014 • In Journal of Materials Science and Technology, 30 (9), p. 894-902

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https://hdl.handle.net/2268/172093

DOI
10.1016/j.jmst.2014.04.007

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Keywords :

Almond shell activated carbon;; Photocatalyst; Total organic carbon; Vapor deposition;; Impregnation;

Abstract :

[en] Three types of photocatalysts were synthesized by metal organic chemical vapor deposition and impregnation methods using the almond shell activated carbon as support. These photocatalysts denoted by (TiO2/ASAC (V), TiO2/ASAC (I1) and TiO2/ASAC (I2)) were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), diffuse reflectance spectroscopy (DRS) and nitrogen adsorptionedesorption isotherms. SEM observation shows that TiO2 was deposited on activated carbon surface. XRD results confirm that TiO2 existed in a mixture of anatase and rutile phases. The DRS spectra show the characteristic absorption edge of TiO2 at approximate 380 nm corresponding to the optical band gap of 3.26 eV. Besides, FTIR spectrum indicated the presence of (TieO) groups. The specific surface area of photocatalysts decreased drastically in comparison with the original activated carbon. The catalysts were very efficient for the photodegradation of total organic carbon (TOC) from industrial phosphoric acid solution under UV irradiation. The kinetics of photocatalytic TOC degradation was found to follow a pseudofirst- order model. The prepared TiO2/ASAC showed high photoactivity for the photodegradation of TOC in the following order: TiO2/ASAC (V) > TiO2/ASAC (I1) > TiO2/ASAC (I2) > ASAC > TiO2 (P25).

Disciplines :

Chemistry
Materials science & engineering

Author, co-author :

Omri, Abdessalem; Université de Sfax

Lambert, Stéphanie ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Nanomatériaux et interfaces

Geens, Jérémy ; Université de Liège - ULiège > Département de chimie appliquée > Département de chimie appliquée

Bennour, Fetten; Université de Sfax, Tunisie

Ben Zina, Mourad; Université de Sfax, Tunisie

Language :

English

Title :

Synthesis, Surface characterization and photocatalytic activity of TiO2 supported on almond shell activated carbon

Publication date :

September 2014

Journal title :

Journal of Materials Science and Technology

ISSN :

1005-0302

eISSN :

1941-1162

Publisher :

Elsevier

Volume :

Issue :

Pages :

894-902

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 18 September 2014

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