Photocatalysis for Air Treatment Processes: Current Technologies and Future Applications for the Removal of Organic Pollutants and Viruses

Escobedo, Salvador; Lasa, Hugo de

doi:10.3390/catal10090966

Cited by 34 publications

(18 citation statements)

References 153 publications

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“…Australian Government Department of Health (2021) , Escobedo and de lasa (2020) and International Committee on Taxonomy of Viruses Virus Taxonomy (2019) .…”

Section: Uncited Referencesmentioning

confidence: 99%

Mouse hepatitis virus: A betacoronavirus model to study the virucidal activity of air disinfection equipment on surface contamination

Oliveira

Kroon

2021

Journal of Virological Methods

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The severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) has infected millions of people worldwide. SARS-CoV-2 belongs to the Betacoronavirus genus, containing the mouse hepatitis virus (MHV), an extensively studied animal coronavirus. Since MHV and SARS-CoV-2 share the same genus, MHV could offer insights relative to SARS-CoV-2 studies. MHV-3 strain causes hepatitis and cellular injury, making MHV-3 infection one of the best models for this debilitating disease. Surrogate coronaviruses have been used for virus resistance and inactivation studies, and although real‐life conditions using SARS-CoV-2 should be encouraged, their use needs to be balanced with safety and costs. MHV can be manipulated under BSL2 laboratory conditions, unlike SARS-CoV-2, making it a model for studying the virucidal effects on coronaviruses. In this study, we used the betacoronavirus MHV-3 as a model to investigate the virucidal activity of an air disinfection equipment named STR Solution®, an air sterilizer with patented technology. MHV-3 was dried on different surfaces and exposed at varying distances from the STR Solution® equipment and at different exposure times. The residual infectivity was evaluated using the endpoint method. There was not a significant reduction (mean p-value = 0.4) of the viral titer under STR Solution® exposition. STR Solution® caused a slight decrease of the infectious particles’ titer (> 1 log 10 ) only under the following conditions: polypropylene at 3 m, for 1 and 3 h (1.2 log 10 reduction TCID 50 ) and Sus domesticus skin at 0.05 m, for 1 hour (1.3 log 10 reduction TCID50), and at 3 m for 1 hour (1.2 log 10 reduction TCID 50 ). These and other studies confirm the usefulness of this model to evaluate virucidal activity.

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“…Australian Government Department of Health (2021) , Escobedo and de lasa (2020) and International Committee on Taxonomy of Viruses Virus Taxonomy (2019) .…”

Section: Uncited Referencesmentioning

confidence: 99%

Mouse hepatitis virus: A betacoronavirus model to study the virucidal activity of air disinfection equipment on surface contamination

Oliveira

Kroon

2021

Journal of Virological Methods

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“…Philips Sun-lamp 400 to 700 100 [95] Philips PL-S 315 to 400 9 Furthermore, it is important to mention that the photocatalytic reactor efficiency depends on the irradiation distribution on the photocatalyst surface. This irradiated photocatalyst surface can be available in a photoreactor as: (1) A film or; (2) Suspended particles in a slurry [113].…”

Section: Location Of Light Sourcementioning

confidence: 99%

Synthesis and Performance of Photocatalysts for Photocatalytic Hydrogen Production: Future Perspectives

Escobedo

Lasa

2021

Catalysts

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Photocatalysis for “green” hydrogen production is a technology of increasing importance that has been studied using both TiO2–based and heterojunction composite-based semiconductors. Different irradiation sources and reactor units can be considered for the enhancement of photocatalysis. Current approaches also consider the use of electron/hole scavengers, organic species, such as ethanol, that are “available” in agricultural waste, in communities around the world. Alternatively, organic pollutants present in wastewaters can be used as organic scavengers, reducing health and environmental concerns for plants, animals, and humans. Thus, photocatalysis may help reduce the carbon footprint of energy production by generating H2, a friendly energy carrier, and by minimizing water contamination. This review discusses the most up-to-date and important information on photocatalysis for hydrogen production, providing a critical evaluation of: (1) The synthesis and characterization of semiconductor materials; (2) The design of photocatalytic reactors; (3) The reaction engineering of photocatalysis; (4) Photocatalysis energy efficiencies; and (5) The future opportunities for photocatalysis using artificial intelligence. Overall, this review describes the state-of-the-art of TiO2–based and heterojunction composite-based semiconductors that produce H2 from aqueous systems, demonstrating the viability of photocatalysis for “green” hydrogen production.

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“…For more than three decades, the scientific community has devoted a great deal of effort to developing photocatalytic processes for the removal of a range of air pollutants [83][84][85][86][87][88]. Photocatalysis has demonstrated to be effective for the removal of pollutants in gas phase at relatively low concentrations [89].…”

Section: Photocatalysis For Air Purificationmentioning

confidence: 99%

Towards Scaling-up Photocatalytic Process for Multiphase Environmental Applications: A Review

Mg¹,

Djellabi²,

Meroni³

et al. 2021

Preprint

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Recently, we have witnessed a booming development of composites and multi-dopant metal oxides to be employed as novel photocatalysts. Yet the practical application of photocatalysis for environmental purposes is still elusive. Concerns about the unknown fate and toxicity of nanoparticles, unsatisfactory performance in real conditions, mass transfer limitations and durability issues have so far discouraged investments in full-scale applications of photocatalysis. Herein, we provide a critical overview of the main challenges that are limiting large-scale application of photocatalysis in air and water/wastewater purification. We then discuss the main approaches reported in the literature to tackle these shortcomings, such as the design of photocatalytic reactors that retain the photocatalyst, the study of degradation of micropollutants in different water matrices, and the development of gas-phase reactors with optimized contact time and irradiation. Furthermore, we provide a critical analysis of research-practice gaps such as treatment of real water and air samples, degradation of pollutants with actual environmental concentrations, photocatalyst deactivation, and cost and environmental life-cycle assessment.

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Photocatalysis for Air Treatment Processes: Current Technologies and Future Applications for the Removal of Organic Pollutants and Viruses

Cited by 34 publications

References 153 publications

Mouse hepatitis virus: A betacoronavirus model to study the virucidal activity of air disinfection equipment on surface contamination

Mouse hepatitis virus: A betacoronavirus model to study the virucidal activity of air disinfection equipment on surface contamination

Synthesis and Performance of Photocatalysts for Photocatalytic Hydrogen Production: Future Perspectives

Towards Scaling-up Photocatalytic Process for Multiphase Environmental Applications: A Review

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