Catalysts in Bacterial Inactivation and Environmental Cleaning

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Environmental Catalysis".

Deadline for manuscript submissions: closed (15 June 2021) | Viewed by 2689

Special Issue Editors

Ecole Polytechnique Fédérale de Lausanne, EPFL-STI-LTP, 1015 Lausanne, Switzerland
Interests: homogeneous and heterogeneous photochemistry; photocatalysis; surface science; fast kinetics; thin films; redox reactions; charge transfer; antibacterial composites; environmental pollution; functional textiles/plastic films
Special Issues, Collections and Topics in MDPI journals
Institute of Crystallography, National Council of Research (IBBC-CNR), 00015 Rome, Italy
Interests: nanomaterials; nanoparticle immobilization; nanoparticle functionalization; biosensors; colloidal synthesis
Special Issues, Collections and Topics in MDPI journals
Institute for Nanotechnology and Water Sustainability Research, College of Science, Engineering and Technology, University of South Africa, Florida 1709, Johannesburg, South Africa
Interests: Homogeneous and heterogeneous catalysis for pollution mitigation, Nanocomposites, Carbon nanomaterials, Water and wastewater treatment, Catalytic energy conversion
CATAA - Centro de Apoio Tecnológico Agro-Alimentar – Agrofood Technological Center, 6000-459 Castelo Branco, Portugal
Interests: Research on the field of food and nutrition, including the effect of natural food probiotics on gut health and homeostasis, antimicrobial properties of natural products, and new sustainable technologies for food conservation
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Dr. Irina Levchuk
E-Mail Website
Guest Editor
Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, Espoo, Finland
Interests: catalysis; water and wastewater treatment; advanced oxidation processes (AOPs); photocatalysis; thin films; SODIS; pathogen inactivation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The areas to be covered in this Special Issue include innovative ideas, procedures, and up-to-date composites leading to environmental biological and pollutant cleaning under light or in the dark. Pathogen inactivation kinetics has evolved in recent years going from semiconductors to doped metal semiconductors and more recently to oxide/metal surface releasing highly oxidative cations. In this way, innovative materials have contributed to the acceleration of pathogen destruction.

The materials and procedures addressed should provide information that reveals a practical potential when applied as colloidal dispersions or surfaces prepared by sputtering methods, physical vapor deposition (PVD), chemical vapor deposition (CVD), and atomic layer deposition (ALD). The kinetics of bacterial processes and the mechanism should be stated in a clear and detailed manner. The same consideration is valid for catalysts/photocatalysts useful in the abatement of environmental recalcitrant pollutant nod degraded by biological treatments in municipal plants. The characterization of the catalyst surface properties responsible for their activity should be reported in each case.

 Films presenting relevant environmental properties and kinetics are of special importance in environmental processes since they allow designing continuous processes not needing the separation of the catalyst and the media after the cleaning process. These films should be reported in relation to their adherence to the substrate, mechanical resistance to friction, thermal stability, and long operational lifetime. This type of research is an area of recent growth.

In this Special Issue, we welcome studies addressing the inactivation of Gram+ or Gram- bacteria, viruses, fungi, and algae. Catalytic and photocatalytic materials leading to the inactivation of biological toxic agents in the dark without the need for external energy source (light, temperature) are also welcome. This type of materials has the advantage of being able to lead to environmental cleaning under mild conditions. Studies should report on the surface properties responsible for bacterial/pollutant abatement describing the size, shape of the catalytic sites, surface atomic composition, surface hydrophilicity/hydrophobicity, surface charge, roughness and surface, and bacterial functional groups. Reports related to 2D surfaces showing the application potential of this up-to-date technology are of topmost interest.

Dr. John Kiwi
Dr. Francesca Petronella
Dr. Gcina Mamba
Dr. Christophe Ruis Espirito Santo
Dr. Irina Levchuk
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Catalysts is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • pathogen inactivation
  • self-sterilizing films
  • preparation of catalyst
  • evaluation of bactericidal kinetics
  • catalyst surface properties
  • bacteria
  • E. coli
  • MRSA
  • S. epidermis
  • fungi
  • Candida albicans
  • virus
  • corona virus
  • cytotoxicity self-cleaning surfaces
  • photocatalysis
  • colloidal deposition of photocatalysts
  • hospital-acquired infections (HAI)
  • bacterial inactivation mechanism
  • environmental cleaning/depollution
  • self-cleaning surfaces
  • nano-particulate semiconductor films doped or not
  • dark and light activated environmental processes
  • TiO2
  • ZnO
  • CuO
  • Ag2O and composite binary/ternary materials
  • recalcitrant pollutant abatement (either NPs or films)

Published Papers (1 paper)

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Research

18 pages, 4871 KiB  
Article
Long-Lasting Photocatalytic and Antimicrobial Activity of Cotton Towels Modified with TiO2 and ZnO Nanoparticles
Catalysts 2021, 11(8), 952; https://doi.org/10.3390/catal11080952 - 09 Aug 2021
Cited by 6 | Viewed by 1802
Abstract
This study aimed to evaluate the durability of the photocatalytic and antimicrobial activities of ZnO and TiO2 nanoparticles (NPs)-modified 100% cotton terry textiles. SEM-EDX confirmed the long-lasting durability of the washing materials, and TGA analysis revealed that ZnO and TiO2 NPs [...] Read more.
This study aimed to evaluate the durability of the photocatalytic and antimicrobial activities of ZnO and TiO2 nanoparticles (NPs)-modified 100% cotton terry textiles. SEM-EDX confirmed the long-lasting durability of the washing materials, and TGA analysis revealed that ZnO and TiO2 NPs can be found on the terry fabric surface; however, the amount of NPs decreased 10 times after 15 washes and 1.6 times after the subsequent 15 washes. The efficiency of self-cleaning properties and antimicrobial activity against five microorganisms (Staphylococcus aureus ATCC 6538, Escherichia coli ATCC 10536, Candida albicans ATCC 10231, Aspergillus niger ATCC 16404, and Bacillus subtilis NCAIM 01644) depended on UVA/B radiation intensity. The increase in UVA/B radiation intensity from 400 to 1400 µW/cm2 significantly increases the effectiveness of photocatalysis. Long-lasting self-cleaning properties characterised the tested fabric; however, stronger photocatalytic efficiency was observed in light with a greater intensity of UVA/B radiation. At the UVA/B radiation intensity of 1400 µW/cm2, a biocidal effect (R = 100%) against all tested microorganisms (E. coli, S. aureus. B. subtilis, C. albicans, and A. niger) was observed on the surface of materials. The lower UVA/B radiation intensity (400 µW/cm2) and 30 wash cycles reduce the antimicrobial activity of the material (R = 65.4–99.4%) for B. subtilis, C. albicans, and A. niger. The antimicrobial activity of washed materials modified with TiO2/ZnO nanoparticles can be increased by irradiation with a light bulb (1400 µW/cm2). Full article
(This article belongs to the Special Issue Catalysts in Bacterial Inactivation and Environmental Cleaning)
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