Mechanisms of <i>Escherichia coli</i> inactivation during solar-driven photothermal disinfection

Hong, Yibo; Shi, Weiye; Wang, Hao; Ma, Defang; Ren, Yang; Wang, Yan; Li, Qian; Gao, Baoyu

doi:10.1039/d1en00999k

Cited by 8 publications

(2 citation statements)

References 53 publications

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“…The in situ Joule heating prompts to release water from the bacterial cells, resulting in dehydration and rupturing. 72 The thermal energy generated during the in situ Joule heating of the face mask dismantles the pathogens captured during PM filtration. The in situ self-sanitization enables spontaneous disinfection to curb the risk of further virus transmission.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Self-Sanitization in a Silk Nanofibrous Network for Biodegradable PM_0.3 Filters with In Situ Joule Heating

Hossain,

Karmakar,

Sarkar

et al. 2024

ACS Omega

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In the contemporary way of life, face masks are crucial in managing disease transmission and battling air pollution. However, two key challenges, self-sanitization and biodegradation of face masks, need immediate attention, prompting the development of innovative solutions for the future. In this study, we present a novel approach that combines controlled acid hydrolysis and mechanical chopping to synthesize a silk nanofibrous network (SNN) seamlessly integrated with a wearable stainless steel mesh, resulting in the fabrication of self-sanitizable face masks. The distinct architecture of face masks showcases remarkable filtration efficiencies of 91.4, 95.4, and 98.3% for PM 0.3 , PM 0.5 , and PM 1.0 , respectively, while maintaining a comfortable level of breathability (ΔP = 92 Pa). Additionally, the face mask shows that a remarkable thermal resistance of 472 °C cm 2 W −1 generates heat spontaneously at low voltage, deactivating Escherichia coli bacteria on the SNN, enabling self-sanitization. The SNN exhibited complete disintegration within the environment in just 10 days, highlighting the remarkable biodegradability of the face mask. The unique advantage of self-sanitization and biodegradation in a face mask filter is simultaneously achieved for the first time, which will open avenues to accomplish environmentally benign nextgeneration face masks.

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Section: ■ Results and Discussionmentioning

confidence: 99%

“…After the Joule heating for 15 min, the irregular shape of bacteria and rupturing of the cell surface is observed in the FESEM images of Figure c,d. The in situ Joule heating prompts to release water from the bacterial cells, resulting in dehydration and rupturing …”

Section: Resultsmentioning

confidence: 99%

Self-Sanitization in a Silk Nanofibrous Network for Biodegradable PM_0.3 Filters with In Situ Joule Heating

Hossain,

Karmakar,

Sarkar

et al. 2024

ACS Omega

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Self‐Powered and Self‐Healable Extraocular‐Muscle‐Like Actuator Based on Dielectric Elastomer Actuator and Triboelectric Nanogenerator

Liu,

Yue,

Tian

et al. 2023

Advanced Materials

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Although dielectric elastomer actuators (DEAs) are promising artificial muscles for use as visual prostheses in patients with permanent oculomotor nerve palsy (ONP), high driving voltage coupled with the vulnerable compliant electrodes coated on the dielectric elastomers limits their safe long‐term service. Herein, a self‐healable polydimethylsiloxane compliant electrode based on reversible imine bonds and hydrogen bonds was prepared and coated on both sides of an acrylic ester film to develop a self‐healable DEA (SDEA), followed by actuation with a high‐output triboelectric nanogenerator (TENG) to construct a self‐powered DEA (TENG‐SDEA). Under 135.9 kV/mm, the self‐powered SDEA exhibited an elevated actuated strain of 50.6%, comparable to the actuation of SDEA under DC power. Moreover, the mechanically damaged TENG‐SDEA displayed a high self‐healing efficiency of over 90% after self‐healing for 3 h at room temperature for 10 cycles. A low electric current of TENG ensuring the safe using of TENG‐SDEAs and an extraocular‐muscle‐like actuator with oriented motion ability integrated by several TENG‐SDEAs was constructed. Additionally, the SDEA was directly used as a flexible capacitive sensor for real‐time monitoring of the patient's muscle movement. Accordingly, a medical aid system based on a conjunction of the extraocular‐muscle‐like actuator and flexible capacitive sensor was manufactured to helped the patients suffering from permanent ONP with disease control and prevention, as well as serve in physical rehabilitation and treatment.This article is protected by copyright. All rights reserved

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Bioprotective Respirator Assembled by Defective Carbon Nitride for Long‐Term Light Triggered Health Protection

Zeng,

Zhang,

et al. 2024

Advanced Science

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Wearing face masks is the best way to stop the spread of respiratory infections. However, if masks are not sterilized, changing them too frequently can actually increase the risk of cross‐contamination. Herein, the construction of an antipathogen photocatalytic mask with carbon vacancy‐modified carbon nitride nanosheets (g‐C3N4‐VC Ns) coated on the non‐woven fabrics of the out layer of the mask, offering effective and long‐term protection against damaging pathogens when exposed to light is reported. The introduced carbon vacancies are found capable of creating energy‐disordered sites and inducing energetic electric force to overcome the Coulomb interactions between electron‐hole pairs, thus promoting the electron‐hole separation to achieve a high generation of reactive oxygen species (ROS). Thanks to its high activity in generating ROS upon exposure to light, the as‐prepared photocatalytic mask shows high pathogen sterilization performance. This, in turn, prolongs the mask's protective lifetime, decreases the need for regular replacement, and decreases medical waste production. The work demonstrated here opens new viewpoints in designing pathogens biocidal protective devices for health protection, offering significant promise in specific environment self‐protection.

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Mechanisms of Escherichia coli inactivation during solar-driven photothermal disinfection

Abstract: Traditional solar water disinfection has low efficiency. Solar-to-heat converting nanomaterials enable the synergy of solar radiation and heat to kill water-borne bacteria. Herein, we explored the mechanism of bacterial inactivation...

Cited by 8 publications

References 53 publications

Self-Sanitization in a Silk Nanofibrous Network for Biodegradable PM_0.3 Filters with In Situ Joule Heating

Self-Sanitization in a Silk Nanofibrous Network for Biodegradable PM_0.3 Filters with In Situ Joule Heating

Self‐Powered and Self‐Healable Extraocular‐Muscle‐Like Actuator Based on Dielectric Elastomer Actuator and Triboelectric Nanogenerator

Bioprotective Respirator Assembled by Defective Carbon Nitride for Long‐Term Light Triggered Health Protection

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Mechanisms of Escherichia coli inactivation during solar-driven photothermal disinfection

Abstract: Traditional solar water disinfection has low efficiency. Solar-to-heat converting nanomaterials enable the synergy of solar radiation and heat to kill water-borne bacteria. Herein, we explored the mechanism of bacterial inactivation...

Cited by 8 publications

References 53 publications

Self-Sanitization in a Silk Nanofibrous Network for Biodegradable PM0.3 Filters with In Situ Joule Heating

Self-Sanitization in a Silk Nanofibrous Network for Biodegradable PM0.3 Filters with In Situ Joule Heating

Self‐Powered and Self‐Healable Extraocular‐Muscle‐Like Actuator Based on Dielectric Elastomer Actuator and Triboelectric Nanogenerator

Bioprotective Respirator Assembled by Defective Carbon Nitride for Long‐Term Light Triggered Health Protection

Contact Info

Product

Resources

About

Self-Sanitization in a Silk Nanofibrous Network for Biodegradable PM_0.3 Filters with In Situ Joule Heating

Self-Sanitization in a Silk Nanofibrous Network for Biodegradable PM_0.3 Filters with In Situ Joule Heating