Abstract
A novel methodology was employed to prepare new nanocomposites with photocatalytic properties based on Ce-doped TiO2 nanoparticles arranged over a layered silicate. The catalysts were porous materials formed by exfoliated silicate layers surrounded by anatase nanoparticles. In this way, the anatase was doped by different amounts of Ce, yielding to catalysts with light absorption properties on the visible region. The photocatalytic behavior was tested for different reactions: adsorption and photocatalysis, showing outstanding and promising results for the removal of bacteria by using solar light as an energy source. The influence of the physicochemical properties of the catalyst and the reaction parameters will be studied in detail to manage new catalysts for the disinfection of drinking water.
Highlights
Removing pollutants from wastewaters is becoming an important area of research as the amount and quality of freshwater available in the world continues to decrease
The idea to use solar light as the energy source to achieve the disinfection of drinking water is the main hypothesis of many researchers
Many efforts are currently focused on the development of reliable catalysts that can be activated by visible and solar light [2] and to generate a system that first adsorbs the bacteria and disinfects it utilizing of the photocatalysis
Summary
Removing pollutants from wastewaters is becoming an important area of research as the amount and quality of freshwater available in the world continues to decrease. Two million people die due to chronic diseases caused by unhealthy water [1] In this sense, the idea to regenerate and reuse polluted water is a necessity that yields to develop new technologies, which application depends on the geographic location and the economy of the country. Many efforts are currently focused on the development of reliable catalysts that can be activated by visible and solar light [2] and to generate a system that first adsorbs the bacteria and disinfects it utilizing of the photocatalysis. The synthesis pathway is based on a sol-gel methodology that allows the generation of new porous materials [13] This process causes the exfoliation/delamination of the silicate layers while creates oxide nanoparticles that are arranged between the silicate sheets, giving rise to new titania/silicate nanocomposites. We are testing its ability to adsorb and degrade bacteria under solar irradiation using photocatalysis
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