Photocatalytic oxidation of methyl ethyl ketones over sol-gel mesoporous and meso-structured TiO2 films obtained by EISA method

被引：28
作者：
Arconada, N. [1 ]
Castro, Y. [1 ]
Duran, A. [1 ]
Hequet, V. [2 ]
机构：
[1] Inst Ceram & Vidrio CSIC, Madrid 28049, Spain
[2] CNRS, Ecole Mines Nantes, GEPEA, UMR 6144, F-44307 Nantes 3, France
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2011年 / 107卷 / 1-2期
关键词：
TiO2 anatase films; Sol-gel; Evaporation induced self assembly method (EISA); Mesoporous order of the films; MEK degradation; VOLATILE ORGANIC-COMPOUNDS; INDOOR AIR PURIFICATION; THIN-FILMS; GAS-PHASE; HETEROGENEOUS PHOTOCATALYSIS; WATER-VAPOR; DEGRADATION; THICKNESS; MEMBRANES; QUALITY;
D O I：
10.1016/j.apcatb.2011.06.036
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
This work reports the influence of the meso-structure of TiO2 films in the photocatalytic oxidation of methyl ethyl ketone. Five types of TiO2 films were prepared combining the sol-gel route with the Evaporation Induced Self-Assembly (EISA) method. Sols were prepared from titanium tetrachloride (TiCl4) using different types of pore generating agents. Films characterisation was performed by Fourier Transform Infrared Spectroscopy (FTIR), Grazing X-ray diffraction (GXRD), X-ray diffraction of small angle and Transmission Electron Microscopy (FE-SEM). Environmental Ellipsometric Porosimetry (EEP) studies were performed to obtain the adsorption/desorption isotherms and calculate porous size distribution, pore volume and specific surface area (S-s) of the films. Kinetic of MEK photocatalytic oxidation data were modelled by Langmuir-Hinshelwood equation and the adsorption and kinetics constants (k and K) were calculated. Better results of MEK degradation were obtained for the Brij58 films deposited at relative humidity (RH) of 20% and 50%. The results are correlated with the porosity properties of the films. (C) 2011 Elsevier B.V. All rights reserved.
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页码：52 / 58
页数：7
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