Photobiocidal-triboelectric nanolayer coating of photosensitizer/silica-alumina for reusable and visible-light-driven antibacterial/antiviral air filters

Jeong, Sang Bin; Lee, Dong Uk; Lee, Byeong Jin; Heo, Ki Joon; Kim, Dong Won; Hwang, Gi Byoung; MacRobert, Alexander J.; Shin, Jae Hak; Ko, Hyun Sik; Park, Se Kye; Oh, Yong Suk; Kim, See Jo; Lee, Dong Yun; Lee, Seung-Bok; Park, In-Yong; Kim, Sang Bok; Han, Bangwoo; Jung, Jae Hee; Choi, Dong Yun

doi:10.1016/j.cej.2022.135830

Cited by 22 publications

(22 citation statements)

References 45 publications

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“…After adding the 1 O 2 quencher l -histidine, the antibacterial performance of the Si-Al@CV film decreased to 0.2log reduction, indicating a complete loss of bacterial activity. These results indicate that Si-Al@CV reacts with visible light to generate 1 O 2 , which is the key ROS leading to bacterial inactivation, and it is consistent with previous antibacterial mechanism studies on CV-coated surfaces. , However, the antibacterial mechanism of Si-Al@CV differed from that of previous studies, in which the antibacterial activity of CV was attributed to the simultaneous occurrence of ROS via both type 1 and type 2 mechanisms. Sehmi et al demonstrated that the 1 O 2 scavenger dominantly affected the bactericidal activity of CV-coated polyurethane against E.…”

Section: Resultsmentioning

confidence: 97%

“…Furthermore, our previous study demonstrated that Si-Al with 1 H ,1 H ,2 H ,2 H -perfluorooctyltriethoxysilane (PFOTES) promoted the type I reaction of CV while simultaneously attenuating the type II reaction . This difference may be due to the presence of fluorine on the surface of PFOTES.…”

Section: Resultsmentioning

confidence: 99%

“…When exposed to a light source, the photosensitizer generates various ROSs, for a multisite attack that kills bacteria without the development of antibiotic-resistant of microorganisms. ROS can eliminate even dead cells and effectively kill bacteria, not in direct contact with the antibacterial substrates . However, developing a transparent and visible light-activated antibacterial surface remains a challenge because the process of coating the colored photosensitizer makes the surface opaque …”

Section: Introductionmentioning

confidence: 99%

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Transparent, Robust, and Photochemical Antibacterial Surface Based on Hydrogen Bonding between a Si-Al and Cationic Dye

Heo

Lee

Shin

et al. 2022

ACS Appl. Mater. Interfaces

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Healthcare-associated infections can occur and spread through direct contact with contaminated fomites in a hospital, such as mobile phones, tablets, computer keyboards, doorknobs, and other surfaces. Herein, this study shows a transparent, robust, and visible light-activated antibacterial surface based on hydrogen bonds between a transparent silica-alumina (Si-Al) sol−gel and a visible light-activated photosensitizer, such as crystal violet (CV). The study of the bonding mechanisms revealed that hydrogen bonding predominantly occurs between the N of CV and Al-OH. Apart from CV, Si-Al can be combined with a variety of dyes, highlighting its potential for wide application. The Si-Al@CV film selectively generates singlet oxygen using ambient visible light, triggering potent photochemical antibacterial performance against Gram-positive and Gram-negative bacteria. Additionally, the Si-Al@CV film is stable even after mechanical stability tests such as tape adhesion, scratch, bending, and water immersion. In vitro cytotoxicity tests using C2C12 myoblast cells showed that the Si-Al@CV film is a biocompatible material. This work suggests a new approach for designing a transparent and robust touchscreen surface with photochemical antibacterial capability against healthcareassociated infections.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Transparent, Robust, and Photochemical Antibacterial Surface Based on Hydrogen Bonding between a Si-Al and Cationic Dye

Heo

Lee

Shin

et al. 2022

ACS Appl. Mater. Interfaces

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“…The starting point of the sol–gel method is a sol–gel dispersion of the coating precursor, which was initially used to prepare Al 2 O 3 coatings and was then gradually extended to other coatings such as ZrO 2 (Yu et al 2017 ), SiO 2 (Jeong et al 2022 ), TiO 2 (Khan and Malik 2022 ), CeO 2 (Kavitha et al 2022 ). An important factor in the process of sol–gel is the sol-gelation time.…”

Section: Preparation Of Stainless Steel Catalystmentioning

confidence: 99%

Stainless steel catalyst for air pollution control: structure, properties, and activity

Wang

Zhao

Tang

et al. 2022

Environ Sci Pollut Res

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With the awakening of environmental awareness, the importance of air quality to human health and the proper functioning of social mechanisms is becoming increasingly prominent. The low cost and high efficiency of catalytic technique makes it a natural choice for achieving deep air purification. Stainless steel alloys have demonstrated their full potential for application in a variety of catalytic fields. The diversity of 3D networks or fibrous structures increases the turbulence within the heterogeneous catalysis, balance the temperature distribution in the reaction bed and, in combination with a highly thermally conductive skeleton, avoid agglomeration and deactivation of the active components; corrosion resistance and thermal stability are adapted to highly endothermic/exothermic or corrosive reaction environments; oxide layers formed by bulk transition metals activated by thermal treatment or etching can significantly alter the physico-chemical properties between the substrate and active species, further improving the stability of stainless steel catalysts; suitable electronic conductivity can be applied to the electrothermal catalysis, which is expected to provide guidance for the reduction of intermittent emission exhausts and the storage of renewable energy. The current applications of stainless steel as catalyst or support in the air purification have covered soot particle capture and combustion, catalytic oxidation of VOCs, SCR, and air sterilization. This paper summarizes several preparation methods and presents the relationships between the preparation process and the activity, and reviews its application and the current status of research in atmospheric environmental management, proposing the advantages and challenges of the stainless steel-based catalysts.

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“…However, previous studies have reported that viral particles can remain active on various surfaces, such as plastic, paper, and stainless steel, for significantly longer time periods than generally expected (over a few days) [ 12 , 13 , 14 ], which prompted considerable efforts on sterilizing all surfaces so as to suppress the potential risks of fomite-mediated infections [ 15 ]. Many types of antiviral technologies, which were fabricated by coating the surfaces where viral particles are captured with functional materials, have been suggested in recent reports [ 16 , 17 , 18 , 19 , 20 ]. However, a challenge for these coating-based antiviral strategies is the renewal of antiviral activities for long-term care because of the performance deterioration of coating materials and the accumulation of dust particles over the coating surfaces [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Development of On-Demand Antiviral Electrostatic Precipitators with Electrothermal-Based Antiviral Surfaces against Airborne Virus Particles

Park

An²,

Lee³

et al. 2022

Toxics

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Particulate matter, including airborne pathogens, is of particular concern because it can cause the spread of diseases through aerosol transmission. In this study, a new concept is proposed: on-demand antiviral electrostatic precipitators (ESPs) with electrothermal-based antiviral surfaces. We applied electrothermal-based antiviral surfaces to air-purifying applications and demonstrated that the proposed method is effective with regard to collecting airborne virus particles on collection plates in a two-stage ESP. With alternating current power, MS2 bacteriophage and H1N1 viruses were completely deactivated after exposure to 50 °C for 30 min. This remarkable antiviral performance via electrothermal effects indicates that on-demand platforms for self-antiviral surfaces can perform sterilization immediately without generating secondary pollutants, thus effectively preventing the spread of infectious microorganisms in public places. We believe that the results of this study can provide useful guidelines for the design and realization of practical and wearable devices for antiviral air-purifying applications.

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Photobiocidal-triboelectric nanolayer coating of photosensitizer/silica-alumina for reusable and visible-light-driven antibacterial/antiviral air filters

Cited by 22 publications

References 45 publications

Transparent, Robust, and Photochemical Antibacterial Surface Based on Hydrogen Bonding between a Si-Al and Cationic Dye

Transparent, Robust, and Photochemical Antibacterial Surface Based on Hydrogen Bonding between a Si-Al and Cationic Dye

Stainless steel catalyst for air pollution control: structure, properties, and activity

Development of On-Demand Antiviral Electrostatic Precipitators with Electrothermal-Based Antiviral Surfaces against Airborne Virus Particles

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