Affiliation:
1. Centro de Química Instituto de Ciencias Benemérita Universidad Autónoma de Puebla (BUAP) Ciudad Universitaria Col. Jardines de San Manuel Pue Puebla 72570 Mexico
2. National Institute for Astrophysics Optics and Electronics (INAOE), Calle Luis Enrique Erro No. 1 Santa María Tonantzintla Andrés Cholula Pue San 72000 Mexico
Abstract
AbstractThe study of photocatalysts fixed to surfaces for the inactivation of bacteria in wastewater has increased in recent years. However, there are no standardized methods to analyze the photocatalytic antibacterial activity of these materials, and no systematic studies have attempted to relate this activity to the number of reactive oxygen species generated during UV‐light irradiation. Additionally, studies regarding photocatalytic antibacterial activity are usually carried out with varying pathogen concentrations, UV light doses, and catalyst amounts, making it difficult to compare results across different materials. The work introduces the photocatalytic bacteria inactivation efficiency (PBIE) and bacteria inactivation potential of hydroxyl radicals (BIPHR) figures of merit for evaluating the photocatalytic activity of catalysts fixed onto surfaces for bacteria inactivation. To demonstrate their applicability, these parameters are calculated for various photocatalytic TiO2‐based coatings, accounting for the catalyst area, the kinetic reaction rate constant associated with bacteria inactivation and hydroxyl radical formation, reactor volume, and UV light dose. This approach enables a comprehensive comparison of photocatalytic films prepared by different fabrication techniques and evaluated under diverse experimental conditions, with potential applications in the design of fixed‐bed reactors.
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
1 articles.
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