Development of a sustainable photocatalytic process for air purification

Chemosphere
Jorge H Martínez-MontelongoJuan Antonio Zapien

Abstract

Nowadays, air pollution has become a global menace being responsible of a significant increase on the morbidity and mortality of human beings. In view of this, sustainable and efficient technologies for air purification are being sought. Air purification by photocatalytic treatment has received a lot of attention due to the unspecific and high oxidation capacity of the catalyst; however still some variables must be optimized to assure practical applications. In this work, visible light active TiO2-Cu2+@perlite and Ag@TiO2-Cu2+/perlite supported materials were fabricated. TiO2-Cu2+ (2 at. %) were synthesized using a sol-gel procedure followed of the impregnation of the support by immersion. For Ag@TiO2-Cu2+, silver deposition was conducted by chemical reduction using sodium citrate and sodium borohydride. The materials (powders and supported materials) were characterized by Scanning Electron Microscopy (SEM) to demonstrate their small size and adherence to the substrate. A prototype of a photocatalytic air purifier was built. The efficacy of the prototype was evaluated for the disinfection of indoor air (dentistry clinics). The photo-catalyst was activated using visible and UVA low-cost high-energy LEDs. The antibacterial activi...Continue Reading

Citations

Jan 28, 2021·Nanotoxicology·Roberto Carlos Valerio-GarcíaAna Laura Carbajal-Hernández
Mar 7, 2021·Journal of Fungi·Jorge H Martínez-MontelongoJorge E Macías-Díaz

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