Abstract
In this study, commercial and lab-prepared TiO2 were modified by fluorination and platinum photodeposition; and the effect of these modifications over the physicochemical and photocatalytic properties of TiO2 was evaluated. It was found that F and Pt addition leads to the modification of the optical and textural properties of TiO2. The materials prepared were tested in the photocatalytic degradation of different organic dyestuffs such as methylene blue (MB) and methyl orange (MO); the degradation of commercial anilines employed in the staining of natural fibers was also evaluated. Photocatalysis was also studied in this work as an eco-friendly treatment of wastewater coming from handicrafts factories. In general it was observed that the effectiveness of the photocatalytic treatment strongly depends on the substrate to be degraded, thus, fluorinated and platinized commercial Titania (Pt-F-P25) showed the best photocatalytic performance in the MB and MO photodegradation and in contrast, in the case of the anilines the highest degradation was obtained over commercial TiO2 fluorinated (F-P25). These results can be explained by differences observed in the structure and in the adsorption of these dyestuffs over the photocatalysts surfaces. F-P25 photocatalyst also demonstrated to be the best material for the treatment of real wastewater coming from handicrafts factories.
Highlights
Handicrafts elaboration is a traditional activity in Latin America and currently, the handicrafts factories represent one of the most important lines of the economy in many regions in Latin-American countries such as Colombia; these industries have a large consumption of water and in these processes important volumes of wastewater containing different pollutants, mainly dyestuffs used in the staining of natural fibers and wool, are generated
As it can be observed in this table, the concentration of the dyestuffs analyzed decreases during the Methylene Blue (MB)
It was observed that these modifications induce absorption in the visible region, lead to obtain lower band gap values and modify the specific surface areas; these modifications are more evident in the lab prepared TiO2 than in commercial one
Summary
Handicrafts elaboration is a traditional activity in Latin America and currently, the handicrafts factories represent one of the most important lines of the economy in many regions in Latin-American countries such as Colombia; these industries have a large consumption of water and in these processes important volumes of wastewater containing different pollutants, mainly dyestuffs used in the staining of natural fibers and wool, are generated. A number of studies have demonstrated that heterogeneous photocatalysis is a promising approach of Advanced Oxidation Process in the treatment of dyestuffs in the liquid phase [2,3,4,5,6,7,8,9,10,11]. In most of these studies, lab prepared dyes solutions or synthetic wastewater are employed and only a few researchers have conducted studies by using real industrial wastewater samples [12,13]. Methyl orange and Methylene blue has extensively studied in order to know their photodegradation mechanism, which takes place mainly by unstable intermediates cations formation and successive oxidation reactions [14,15,16,17]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
