Bactericidal mechanisms of Au@TNBs under visible light irradiation

Guo, Lingqiao; Shan, Chao; Liang, Jialiang; Ni, Jinren; Tong, Meiping

doi:10.1016/j.colsurfb.2015.01.013

Cited by 19 publications

(4 citation statements)

References 54 publications

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“…Nevertheless, the decline of the disinfection effect of 3% and 5% Au/TiO 2 composites could due to the increase of the Au particle size. The previous work reported that when Au particles with different sizes were deposited on the surface of zeolites, the photocatalytic activity of Au/zeolite in benzyl alcohol oxidation decreased with the increase of particle size [16]. For Au NPs on a ZrO 2 photocatalyst, a significant decreasing of photocatalytic HCHO oxidation was also noted when the Au nanoparticles size was increased [17].…”

Section: Resultsmentioning

confidence: 92%

One-pot synthesis of Au/TiO2 heteronanostructure composites with SPR effect and its antibacterial activity

et al. 2016

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Section: Resultsmentioning

confidence: 92%

One-pot synthesis of Au/TiO2 heteronanostructure composites with SPR effect and its antibacterial activity

et al. 2016

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“…However, those photocatalysts do not possess as strong oxidation abilities as that of titania under UV irradiation (2-3 orders in magnitude lower photocatalytic activity under vis than that under UV have been reported [33,38,39]), due to the low energy of visible light and fast charge carrier recombination (i.e., back electron transfer to NMNPs (e.g., NM→TiO 2 →NM) [49]). Therefore, various studies on the improvement of the photocatalytic activities of plasmonic photocatalysts have been proposed (e.g., modification of NMNPs' morphology [50], heterojunction with other semiconductors/complexes [33,51,52], deposition of second NMNPs [53][54][55], the addition of adsorbents [56][57][58], and morphology modifications of semiconductor [49,[59][60][61]).…”

Section: Plasmonic Photocatalysismentioning

confidence: 99%

“…•− and H 2 O 2 ) and direct redox reactions by charge carriers (surface e − /h + ) have also been proposed for bacterial inactivation [61,69]. In addition, Du et al have found that proteins are an initial target of radicals (HO • ), preceding lipids and DNA [70].…”

Section: Heterogeneous Photocatalysis For Microbiological Purposesmentioning

confidence: 99%

“…In addition to Ag and Cu, Au-modified titania has also been considered as an antimicrobial agent. Moreover, not only the plasmonic photocatalysis (ROS generation) under irradiation [61,115,130,131], but also electron transfer between Au and bacteria (extracellular electron transfer) [59,132] might cause bacterial death. On the other hand, another report insists that Au-modified titania does not possess any bactericidal property [120].…”

Section: Plasmonic Photocatalysts For Inactivation Of Microorganismsmentioning

confidence: 99%

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Plasmonic Photocatalysts for Microbiological Applications

Endo‐Kimura

Kowalska

2020

Catalysts

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Wide-bandgap semiconductors modified with nanostructures of noble metals for photocatalytic activity under vis irradiation due to localized surface plasmon resonance (LSPR), known as plasmonic photocatalysts, have been intensively investigated over the last decade. Most literature reports discuss the properties and activities of plasmonic photocatalysts for the decomposition of organic compounds and solar energy conversion. Although noble metals, especially silver and copper, have been known since ancient times as excellent antimicrobial agents, there are only limited studies on plasmonic photocatalysts for the inactivation of microorganisms (considering vis-excitation). Accordingly, this review has discussed the available literature reports on microbiological applications of plasmonic photocatalysis, including antibacterial, antiviral and antifungal properties, and also a novel study on other microbiological purposes, such as cancer treatment and drug delivery. Although some reports indicate high antimicrobial properties of these photocatalysts and their potential for medical/pharmaceutical applications, there is still a lack of comprehensive studies on the mechanism of their interactions with microbiological samples. Moreover, contradictory data have also been published, and thus more study is necessary for the final conclusions on the key-factor properties and the mechanisms of inactivation of microorganisms and the treatment of cancer cells.

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Preparation of Porous Ga‐Doped TiO₂ Composite Aerogel and Its Bactericidal Activity against Escherichia coli and Staphylococcus aureus

Song,

Huang,

Cui

2024

Adv Eng Mater

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In this work, a novel strategy for preparing Ga‐doped TiO2 composite aerogel antibacterial agent through the sol‐gel method and supercritical technology is demonstrated. The specific surface area of the samples was as high as 175 m2/g and exhibited a three‐dimensional network structure with a multistage pore distribution. The obtained antibacterial agent combines the phototoxicity of TiO2 and photo‐independent toxicity of Ga3+ and structural properties of aerogels, showing a synergistic antibacterial effect. On the one hand, TiO2 produces ROS in the presence of light, thus destroying the structure of bacteria. On the other hand, Ga3+ will competitively replace Fe3+ and hinder the metabolic process of bacteria. Moreover, the structural properties of aerogels promote superior antimicrobial performance of antibacterial agents. Their antibacterial properties against E. coli and S. aureus bacteria were mainly investigated through the inhibition zone and natural colony counting method. The results show that the structure and bactericidal activity of TiO2 aerogel has been effectively optimized with Ga3+ doping. The maximum zone of inhibition of the composite aerogel against E. coli and S. aureus was 17.5 and 16 mm, and the bactericidal rate was as high as 98.57% and 96.60%, which exhibit outstanding bactericidal performance.This article is protected by copyright. All rights reserved.

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Bactericidal mechanisms of Au@TNBs under visible light irradiation

Cited by 19 publications

References 54 publications

One-pot synthesis of Au/TiO2 heteronanostructure composites with SPR effect and its antibacterial activity

One-pot synthesis of Au/TiO2 heteronanostructure composites with SPR effect and its antibacterial activity

Plasmonic Photocatalysts for Microbiological Applications

Preparation of Porous Ga‐Doped TiO₂ Composite Aerogel and Its Bactericidal Activity against Escherichia coli and Staphylococcus aureus

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Bactericidal mechanisms of Au@TNBs under visible light irradiation

Cited by 19 publications

References 54 publications

One-pot synthesis of Au/TiO2 heteronanostructure composites with SPR effect and its antibacterial activity

One-pot synthesis of Au/TiO2 heteronanostructure composites with SPR effect and its antibacterial activity

Plasmonic Photocatalysts for Microbiological Applications

Preparation of Porous Ga‐Doped TiO2 Composite Aerogel and Its Bactericidal Activity against Escherichia coli and Staphylococcus aureus

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Preparation of Porous Ga‐Doped TiO₂ Composite Aerogel and Its Bactericidal Activity against Escherichia coli and Staphylococcus aureus