Photodegradation of 1,2,4-Trichlorobenzene on Montmorillonite–TiO2 Nanocomposites

Abstract

Montmorillonite-TiO 2 nanocomposites were prepared using two different methods (ultrasonic or stirring) and using titanium(IV) isopropoxide as precursor. The solids were characterized by element chemical analysis, X-ray diffraction, FTIR spectroscopy, thermal analyses, and nitrogen adsorption. The evolution of the properties as a function of the preparation method was discussed. These nanocomposites were used as catalysts for the photodegradation of 1,2,4-trichlorobenzene. The degradation pathway and the nature of the by-products were investigated by mass spectrometry.

White and Red Brazilian São Simão’s Kaolinite–TiO2 Nanocomposites as Catalysts for Toluene Photodegradation from Aqueous Solutions

“…These results were similar to those reported by other authors [40,41], where kaolinite–TiO 2 composites were prepared by the hydrolytic sol–gel method and showed higher photo–degradation performance than TiO 2 -P25, as also reported for other photoprocesses [15,38]. It is necessary to highlight that the catalyst/toluene ratio used in this work was much lower than that used by other authors [15,40,41,42,43], so the degradation capacity of the prepared catalysts is much higher than that reported by other authors.…”

Progress and perspectives on pillared clays applied in energetic and environmental remediation processes

“…Clay minerals pillared with titanium can show greater photoactivity than TiO2 particles and thus these materials have been widely used for photocatalytic removal of contaminants [40]. Montmorillonite-TiO2 nanocomposites were prepared by González et al [41] using two methods (ultrasonic and stirring) and titanium(IV) isopropoxide as precursor. These nanocomposites were considered as active catalysts for the photodegradation of 1,2,4-trichlorobenzene (C6H3Cl3, TCB).…”

Heterogeneous Photocatalysis

“…Montmorillonite-TiO 2 nanocomposites using during the photodegradation of 1,2,4trichlorobenzene are also presented. Both ultrasonic and stirring methods were used to synthesize the samples, while a complete characterization approach provided relevant results about the chemical, morphological and structural properties of the catalysts as well as the photo handling charges and mechanism pathway [18].…”

“…The well-structured control that can be obtained using magnetron sputtering will be fully exploited in the coming years while considering a definitive dependence of the superficial structure in the photocatalytic process[17].Montmorillonite-TiO 2 nanocomposites using during the photodegradation of 1,2,4trichlorobenzene are also presented. Both ultrasonic and stirring methods were used to synthesize the samples, while a complete characterization approach provided relevant results about the chemical, morphological and structural properties of the catalysts as well as the photo handling charges and mechanism pathway[18].…”