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Yang H, Du Z, Yang Y, Wu Q, Ma C, Su H, Wang X, Zeng D. Ce-Ag Active Bimetallic Pairs in Two-Dimensional SnS 2 for Enhancing NO 2 Sensing. ACS Sens 2024; 9:283-291. [PMID: 38215040 DOI: 10.1021/acssensors.3c01924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2024]
Abstract
Developing gas sensors capable of efficiently detecting harmful gases is urgent to protect the human environment. Here, an active Ce-Ag bimetallic pair was innovatively introduced into SnS2, which successfully exhibited excellent NO2 gas sensing performance. 0.8% Ce-SnS2-Ag showed a gas sensing response of 5.18 to 1 ppm of NO2 at a low temperature of 80 °C, with a lower limit of detection as low as 100 ppb. DFT calculations revealed that Ce atoms are substituted into the main lattice of SnS2, which opens up the interlayer spacing and serves as an anchor point to fix the Ag atoms in the interlayer. The Ce-Ag bimetallic pairs successfully modulate the electronic structure of SnS2, which promotes the adsorption and charge transfer between NO2 and Ce-SnS2-Ag and thus achieves such an outstanding gas sensing performance. This work opens an avenue for the rational functional modification of SnS2 with an optimized electronic structure and enhanced gas sensing.
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Affiliation(s)
- Huimin Yang
- The State Key Laboratory of Materials and Processing Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Zhenming Du
- The State Key Laboratory of Materials and Processing Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Yazhou Yang
- The State Key Laboratory of Materials and Processing Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Qirui Wu
- The State Key Laboratory of Materials and Processing Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Chaofan Ma
- The State Key Laboratory of Materials and Processing Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Huiyu Su
- The State Key Laboratory of Materials and Processing Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Xiaoxia Wang
- The State Key Laboratory of Materials and Processing Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Dawen Zeng
- The State Key Laboratory of Materials and Processing Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
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Winter H, Wagner R, Yao Y, Ehlbeck J, Schnabel U. Influence of plasma-treated air on surface microbial communities on freshly harvested lettuce. Curr Res Food Sci 2023; 7:100649. [PMID: 38115898 PMCID: PMC10728334 DOI: 10.1016/j.crfs.2023.100649] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 11/07/2023] [Accepted: 11/25/2023] [Indexed: 12/21/2023] Open
Abstract
Plant-based foods like lettuce are an important part of the human diet and worldwide industry. On a global scale, the number of food-associated illnesses increased in the last decades. Conventional lettuce sanitation methods include cleaning either with tap or chloritized water. Beside these water-consuming strategies, physical plasma is an innovative and effective possibility for food sanitation. Recent studies with plasma-treated water showed an effective reduction of the microbial load. Plasma-processed air (PPA) is another great opportunity to reduce the microbial load and save water. To test the efficiency of PPA, the surface microbiome of treated lettuce was analyzed via proliferation assays with special agars, live/dead assays and tests for respiratory activity of the microorganisms. PPA showed a reduction of the colony forming units (CFU/mL) on all tested microbial groups (Gram-negative and Gram-positive bacteria, yeasts and molds). These results were supported by the live/dead assay. For further insights, the PPA-ingredients were detected with Fourier Transformation Infrared Spectroscopy (FTIR), which revealed NO2, NO and N2O5 as the main reactive species in the PPA. In the future, PPA could be an outstanding, on-demand sanitation step for higher food safety standards, especially in situations where humidity and high temperature should be avoided.
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Affiliation(s)
- Hauke Winter
- Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Strasse 2, 17489, Greifswald, Germany
- Institute of Microbiology, University of Greifswald, Felix-Hausdorff-Strasse 8, 17489, Greifswald, Germany
| | - Robert Wagner
- Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Strasse 2, 17489, Greifswald, Germany
| | - Yijiao Yao
- Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Strasse 2, 17489, Greifswald, Germany
- Department of Food & Nutritional Sciences, University of Reading, Whiteknights, Reading, RG6 6AD, UK
| | - Jörg Ehlbeck
- Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Strasse 2, 17489, Greifswald, Germany
| | - Uta Schnabel
- Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Strasse 2, 17489, Greifswald, Germany
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Chautrand T, Depayras S, Souak D, Bouteiller M, Kondakova T, Barreau M, Ben Mlouka MA, Hardouin J, Konto-Ghiorghi Y, Chevalier S, Merieau A, Orange N, Duclairoir-Poc C. Detoxification Response of Pseudomonas fluorescens MFAF76a to Gaseous Pollutants NO 2 and NO. Microorganisms 2022; 10:microorganisms10081576. [PMID: 36013994 PMCID: PMC9414441 DOI: 10.3390/microorganisms10081576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 07/25/2022] [Accepted: 07/29/2022] [Indexed: 11/16/2022] Open
Abstract
Bacteria are often exposed to nitrosative stress from their environment, from atmospheric pollution or from the defense mechanisms of other organisms. Reactive nitrogen species (RNS), which mediate nitrosative stress, are notably involved in the mammalian immune response through the production of nitric oxide (NO) by the inducible NO synthase iNOS. RNS are highly reactive and can alter various biomolecules such as lipids, proteins and DNA, making them toxic for biological organisms. Resistance to RNS is therefore important for the survival of bacteria in various environments, and notably to successfully infect their host. The fuel combustion processes used in industries and transports are responsible for the emission of important quantities of two major RNS, NO and the more toxic nitrogen dioxide (NO2). Human exposure to NO2 is notably linked to increases in lung infections. While the response of bacteria to NO in liquid medium is well-studied, few data are available on their exposure to gaseous NO and NO2. This study showed that NO2 is much more toxic than NO at similar concentrations for the airborne bacterial strain Pseudomonas fluorescens MFAF76a. The response to NO2 involves a wide array of effectors, while the response to NO seemingly focuses on the Hmp flavohemoprotein. Results showed that NO2 induces the production of other RNS, unlike NO, which could explain the differences between the effects of these two molecules.
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Affiliation(s)
- Thibault Chautrand
- Research Unit Bacterial Communication and Anti-Infectious Strategies (UR CBSA), University of Rouen Normandy, 55 Rue Saint-Germain, 27000 Evreux, France
| | - Ségolène Depayras
- Research Unit Bacterial Communication and Anti-Infectious Strategies (UR CBSA), University of Rouen Normandy, 55 Rue Saint-Germain, 27000 Evreux, France
- Praxens, Normandy Health Security Center, 55 Rue Saint-Germain, 27000 Evreux, France
| | - Djouhar Souak
- Research Unit Bacterial Communication and Anti-Infectious Strategies (UR CBSA), University of Rouen Normandy, 55 Rue Saint-Germain, 27000 Evreux, France
| | - Mathilde Bouteiller
- Research Unit Bacterial Communication and Anti-Infectious Strategies (UR CBSA), University of Rouen Normandy, 55 Rue Saint-Germain, 27000 Evreux, France
| | - Tatiana Kondakova
- LPS-BIOSCIENCES SAS, Domaine de l’Université Paris Sud, Bâtiment 430, Université Paris Saclay, 91400 Orsay, France
| | - Magalie Barreau
- Research Unit Bacterial Communication and Anti-Infectious Strategies (UR CBSA), University of Rouen Normandy, 55 Rue Saint-Germain, 27000 Evreux, France
| | - Mohamed Amine Ben Mlouka
- Polymers, Biopolymers, Surface Laboratory, University of Rouen Normandy, INSA, CNRS, Bâtiment DULONG—Bd Maurice de Broglie, CEDEX, F-76821 Mont-Saint-Aignan, France
- PISSARO Proteomic Facility, IRIB, F-76820 Mont-Saint-Aignan, France
| | - Julie Hardouin
- Polymers, Biopolymers, Surface Laboratory, University of Rouen Normandy, INSA, CNRS, Bâtiment DULONG—Bd Maurice de Broglie, CEDEX, F-76821 Mont-Saint-Aignan, France
- PISSARO Proteomic Facility, IRIB, F-76820 Mont-Saint-Aignan, France
| | - Yoan Konto-Ghiorghi
- Research Unit Bacterial Communication and Anti-Infectious Strategies (UR CBSA), University of Rouen Normandy, 55 Rue Saint-Germain, 27000 Evreux, France
| | - Sylvie Chevalier
- Research Unit Bacterial Communication and Anti-Infectious Strategies (UR CBSA), University of Rouen Normandy, 55 Rue Saint-Germain, 27000 Evreux, France
| | - Annabelle Merieau
- Research Unit Bacterial Communication and Anti-Infectious Strategies (UR CBSA), University of Rouen Normandy, 55 Rue Saint-Germain, 27000 Evreux, France
| | - Nicole Orange
- Research Unit Bacterial Communication and Anti-Infectious Strategies (UR CBSA), University of Rouen Normandy, 55 Rue Saint-Germain, 27000 Evreux, France
| | - Cécile Duclairoir-Poc
- Research Unit Bacterial Communication and Anti-Infectious Strategies (UR CBSA), University of Rouen Normandy, 55 Rue Saint-Germain, 27000 Evreux, France
- Correspondence:
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