TiO2 and TiO2-Carbon Hybrid Photocatalysts for Diuron Removal from Water

Catalysts

Patricia García-Muñoz¹  Nicolas Keller¹  Ana Amorós-Pérez²  MaríaÁngeles Lillo-Ródenas²  Maríadel Carmen Román-Martínez² 

[1] Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé, Centre National de la Recherche Scientifique (CNRS) et Université d’Strasbourg, 25 rue Becquerel, 67087 Strasbourg, France;Materiales Carbonosos y Medio Ambiente (MCMA) Group, Department of Inorganic Chemistry and Materials Institute (IUMA), Faculty of Sciences, University of Alicante, Ap. 99, E-03080 Alicante, Spain;

关键词: photocatalysis;    TiO₂;    activated carbon;    diuron;    solar chamber;   

DOI  :  10.3390/catal11040457

来源: DOAJ

【 摘 要 】

TiO₂ and TiO₂-activated carbon (AC) photocatalysts have been prepared (by sol-gel synthesis), characterized, and tested in the removal of diuron from water under simulated solar light. The preparation variables of the two series of catalysts are: (i) heat-treatment temperature of bare TiO₂ (350, 400, 450 and 500 °C) and (ii) activated carbon content (0.5, 1, 5, and 10 wt.%) in TiO₂-AC samples heat-treated at 350 °C. The activated carbon was previously prepared by hydrothermal carbonization of saccharose and has spherical shape. The heat-treatment temperature does not determine the efficiency of TiO₂ for diuron photocatalytic degradation but clearly influences the diuron adsorption capacity. The capacity of TiO₂-AC samples for diuron removal increases with the carbon content and it is the result of combined diuron adsorption and photodegradation. Thus, the sample with highest carbon content (10 wt.% nominal) leads to the highest diuron removal. The TiO₂-AC photocatalysts have proved to be capable of degrading diuron previously adsorbed in dark conditions, which allows their regeneration.

【 授权许可】

Unknown