Enhanced Photocatalytic Degradation of Salicylic Acid in Water-ethanol Mixtures from Titanium Dioxide Grafted with Hexadecyltrichlorosilane

Mounir Kassir; Thibault Roques-Carmes; Karine Assaker; Tayssir Hamieh; Angelina Razafitianamaharavo; Joumana Toufaily; Frédéric Villiéras

doi:10.1016/j.phpro.2014.07.058

Enhanced Photocatalytic Degradation of Salicylic Acid in Water-ethanol Mixtures from Titanium Dioxide Grafted with Hexadecyltrichlorosilane

Mounir Kassir
, Thibault Roques-Carmes^*
, Karine Assaker
, Tayssir Hamieh
, Angelina Razafitianamaharavo
, Joumana Toufaily
, Frédéric Villiéras

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

The aim of this paper is to study the effect of the chemical modification on the photocatalytic properties of TiO2. The TiO2 Degussa-P25 nanoparticles are chemically modified using the hydrophobic organosilane hexadecyltrichlorosilane (HTS). The samples are employed as catalysts for salicylic acid photocatalytic oxidation in water-ethanol mixtures. The kinetics of salicylic acid photodegradation is investigated as a function of ethanol content in water-ethanol mixtures and initial HTS concentrations. The results indicate that the HTS groups are not degraded during the photocatalytic process. The TiO2 grafted by HTS is more efficient than bare TiO2 for the photodegradation process in presence of ethanol. The photodegradation process follows first order kinetics and the apparent rate constant increases linearly with the initial HTS concentration (amount of HTS grafted).

Original language	English
Pages (from-to)	403-408
Number of pages	6
Journal	Physics Procedia
Volume	55
DOIs	https://doi.org/10.1016/j.phpro.2014.07.058
Publication status	Published - 2014
Externally published	Yes

Keywords

Photocatalysis
TiO2
HTS
ethanol
salicylic acid

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10.1016/j.phpro.2014.07.058Licence: CC BY-NC-ND

http://adsabs.harvard.edu/abs/2014PhPro..55..403K

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@article{499971e51cb74fc1b30b38646a96d66c,

title = "Enhanced Photocatalytic Degradation of Salicylic Acid in Water-ethanol Mixtures from Titanium Dioxide Grafted with Hexadecyltrichlorosilane",

abstract = "The aim of this paper is to study the effect of the chemical modification on the photocatalytic properties of TiO2. The TiO2 Degussa-P25 nanoparticles are chemically modified using the hydrophobic organosilane hexadecyltrichlorosilane (HTS). The samples are employed as catalysts for salicylic acid photocatalytic oxidation in water-ethanol mixtures. The kinetics of salicylic acid photodegradation is investigated as a function of ethanol content in water-ethanol mixtures and initial HTS concentrations. The results indicate that the HTS groups are not degraded during the photocatalytic process. The TiO2 grafted by HTS is more efficient than bare TiO2 for the photodegradation process in presence of ethanol. The photodegradation process follows first order kinetics and the apparent rate constant increases linearly with the initial HTS concentration (amount of HTS grafted).",

keywords = "Photocatalysis, TiO2, HTS, ethanol, salicylic acid",

author = "Mounir Kassir and Thibault Roques-Carmes and Karine Assaker and Tayssir Hamieh and Angelina Razafitianamaharavo and Joumana Toufaily and Fr{\'e}d{\'e}ric Villi{\'e}ras",

year = "2014",

doi = "10.1016/j.phpro.2014.07.058",

language = "English",

volume = "55",

pages = "403--408",

journal = "Physics Procedia",

issn = "1875-3892",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Enhanced Photocatalytic Degradation of Salicylic Acid in Water-ethanol Mixtures from Titanium Dioxide Grafted with Hexadecyltrichlorosilane

AU - Kassir, Mounir

AU - Roques-Carmes, Thibault

AU - Assaker, Karine

AU - Hamieh, Tayssir

AU - Razafitianamaharavo, Angelina

AU - Toufaily, Joumana

AU - Villiéras, Frédéric

PY - 2014

Y1 - 2014

N2 - The aim of this paper is to study the effect of the chemical modification on the photocatalytic properties of TiO2. The TiO2 Degussa-P25 nanoparticles are chemically modified using the hydrophobic organosilane hexadecyltrichlorosilane (HTS). The samples are employed as catalysts for salicylic acid photocatalytic oxidation in water-ethanol mixtures. The kinetics of salicylic acid photodegradation is investigated as a function of ethanol content in water-ethanol mixtures and initial HTS concentrations. The results indicate that the HTS groups are not degraded during the photocatalytic process. The TiO2 grafted by HTS is more efficient than bare TiO2 for the photodegradation process in presence of ethanol. The photodegradation process follows first order kinetics and the apparent rate constant increases linearly with the initial HTS concentration (amount of HTS grafted).

AB - The aim of this paper is to study the effect of the chemical modification on the photocatalytic properties of TiO2. The TiO2 Degussa-P25 nanoparticles are chemically modified using the hydrophobic organosilane hexadecyltrichlorosilane (HTS). The samples are employed as catalysts for salicylic acid photocatalytic oxidation in water-ethanol mixtures. The kinetics of salicylic acid photodegradation is investigated as a function of ethanol content in water-ethanol mixtures and initial HTS concentrations. The results indicate that the HTS groups are not degraded during the photocatalytic process. The TiO2 grafted by HTS is more efficient than bare TiO2 for the photodegradation process in presence of ethanol. The photodegradation process follows first order kinetics and the apparent rate constant increases linearly with the initial HTS concentration (amount of HTS grafted).

KW - Photocatalysis

KW - TiO2

KW - HTS

KW - ethanol

KW - salicylic acid

U2 - 10.1016/j.phpro.2014.07.058

DO - 10.1016/j.phpro.2014.07.058

M3 - Article

SN - 1875-3892

VL - 55

SP - 403

EP - 408

JO - Physics Procedia

JF - Physics Procedia

ER -

Enhanced Photocatalytic Degradation of Salicylic Acid in Water-ethanol Mixtures from Titanium Dioxide Grafted with Hexadecyltrichlorosilane

Abstract

Keywords

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