Antimicrobial property and photocatalytic antibacterial mechanism of the TiO2-doped SiO2 hybrid materials under ultraviolet-light irradiation and visible-light irradiation

Chen, Yifan; Tang, Xiaoning; Gao, Xin; Zhang, Bin; Luo, Yong Ming; Yao, Xiyan

doi:10.1016/j.ceramint.2019.05.054

Cited by 57 publications

(44 citation statements)

References 35 publications

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“…As described in the Fig. 7, the antibacterial mechanism of Ag/TiO 2 /PDA nanofilm showed that Ag/TiO 2 /PDA nanofilm generated highly ROS after visible light irradiation [47][48][49]. The presence of the ROS with hydroxyl groups leads to cell inactivation through oxidative damage of the cell membrane or by the penetration of superoxide anions and hydrogen peroxide into the cells [50].…”

Section: Antibacterial Activity Of Ag/tio 2 /Pda Nanofilm Under Visibmentioning

confidence: 97%

“…The contribution of PDA nanofilm as plausible support to the photocatalytic mechanism is confirmed by the efficient electron transfer process. Subsequently, some ROS such as hydroxyl radical, hydrogen peroxide, and superoxides are generated, which can destroy the cell wall and membrane of bacterial cell, causing immediate bacterial inactivation [47][48][49].…”

Section: Evaluation Of Photoelectrochemical Propertiesmentioning

confidence: 99%

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Antibacterial properties of Ag/TiO2/PDA nanofilm on anodized 316L stainless steel substrate under illumination by a normal flashlight

Liu

et al. 2020

J Mater Sci

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The demand of medical materials for rapid and efficient elimination of bacteria has seen a dramatic surge over the past few years. In this study, antibacterial nanofilms with reactive oxygen species were generated by photocatalysis. To prepare these nanofilms, Ag and amorphous TiO 2 nanoparticles decorated on polydopamine (PDA) were coated on three-dimensional (3D) nanopore arrays, which was fabricated on a substrate of anodized stainless steel. All the antibacterial tests were conducted with a household flashlight, which may be considered as a practical approach for antibacterial materials. The photoelectrochemical property of the 3D Ag/TiO 2 /PDA nanofilm on 316L stainless steel (Ag/TiO 2 /PDA SS) was about 15 times higher than that of the annealed Ag/ TiO 2 /PDA SS, and consequently, it exhibited higher antibacterial activity. The enhanced photoelectrochemical property is attributed to the successful separation of electrons (amorphous TiO 2 ) and holes (Ag nanoparticles). Further, when a plate containing 3D Ag/TiO 2 /PDA SS was irradiated with visible light just for 10 min, it immediately destroyed the bacteria in 10 6 CFU/mL without any bacterial colony. After five weeks, there were still no bacterial colonies in the plate corresponding to Ag/TiO 2 /PDA SS under visible light, while Ag/TiO 2 / PDA SS in dark had a negligible effect on the bacteria, i.e., the antibacterial mechanism through direct contact and ion dissolution was not efficient. The excellent antibacterial properties of 3D Ag/TiO 2 /PDA SS illuminated by flashlight provides an efficient, facile, and cost-effective technique for the development of antibacterial medical materials to meet the increasing demand of eliminating bacterial infections.

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Section: Antibacterial Activity Of Ag/tio 2 /Pda Nanofilm Under Visibmentioning

confidence: 97%

Section: Evaluation Of Photoelectrochemical Propertiesmentioning

confidence: 99%

Antibacterial properties of Ag/TiO2/PDA nanofilm on anodized 316L stainless steel substrate under illumination by a normal flashlight

Liu

et al. 2020

J Mater Sci

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“…and Cryptococcus spp. (Fungus) [ 79 ] Didodecyldimethylammonium bromide (DDAB) Physical immobilization on Silica nanoparticles Chemical functionalization S. aureus (gram-positive bacteria), E. coli (gram-negative bacteria), C. albicans (fungi), A. oryzae (mold), P. ochrochloron (mold), and influenza A/PR/8/34 (H1N1; virus) [ 80 ] Gold NPs Anodization NIR irradiation E. coli (gram-negative), S. aureus (gram-positive bacteria) [ 60 ] MoS 2 Magnetron sputtering NIR irradiation S. aureus (gram-positive bacteria) [ 81 ] MnO 2 Hydrothermal synthesis NIR irradiation E. coli (gram-negative), S. aureus (gram-positive bacteria) [ 82 ] TiO 2 Solgel UV light MS2 bacteriophage, influenza virus, and murine norovirus (virus) [ 75 ] SiO2-TiO2 Solgel UV light, Visible light E. coli [ 83 ] …”

Section: Antimicrobial Approachesmentioning

confidence: 99%

Antimicrobial surfaces: a review of synthetic approaches, applicability and outlook

2021

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The rapid spread of microorganisms such as bacteria, fungi, and viruses can be extremely detrimental and can lead to seasonal epidemics or even pandemic situations. In addition, these microorganisms may bring about fouling of food and essential materials resulting in substantial economic losses. Typically, the microorganisms get transmitted by their attachment and growth on various household and high contact surfaces such as doors, switches, currency. To prevent the rapid spread of microorganisms, it is essential to understand the interaction between various microbes and surfaces which result in their attachment and growth. Such understanding is crucial in the development of antimicrobial surfaces. Here, we have reviewed different approaches to make antimicrobial surfaces and correlated surface properties with antimicrobial activities. This review concentrates on physical and chemical modification of the surfaces to modulate wettability, surface topography, and surface charge to inhibit microbial adhesion, growth, and proliferation. Based on these aspects, antimicrobial surfaces are classified into patterned surfaces, functionalized surfaces, superwettable surfaces, and smart surfaces. We have critically discussed the important findings from systems of developing antimicrobial surfaces along with the limitations of the current research and the gap that needs to be bridged before these approaches are put into practice. Supplementary Information The online version contains supplementary material available at 10.1007/s10853-021-06404-0.

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“…In addition, the AgCl NPs promote the generation of oxygen anions. Especially ROS, such as superoxide anion free radicals (ÁO 2 -), hydroxyl free radicals (ÁOH) and hydrogen peroxide (H 2 O 2 ) are considered to be the main products disrupting cellular homeostasis and dynamic equilibrium causing leakage of cell contents and ultimately bacterial apoptosis (Chen et al 2019). Furthermore, the ROS can oxidize mediated proteins, lipids and even DNA, and then lead to the loss of general functions of biofilm-related enzymes.…”

Section: Antibacterial Mechanismmentioning

confidence: 99%

Simple and green synthesis of calcium alginate/AgCl nanocomposites with low-smoke flame-retardant and antimicrobial properties

Zhang

Xue

et al. 2021

Cellulose

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Fire hazards and infectious diseases result in great threats to public safety and human health, thus developing multi-functional materials to deal with these issues is critical and yet has remained challenging to date. In this work, we report a facile and ecofriendly synthetic approach for the preparation of calcium alginate/silver chloride (CA/AgCl) nanocomposites with dual functions of excellent flame-retardant and antibacterial activity. Multi characterization techniques and antibacterial assays were performed to investigate the flame-retardant and antibacterial properties of the CA/AgCl nanocomposites. The obtained results show that the CA/AgCl nanocomposites exhibited much higher limiting oxygen index value ([ 60%) than that of CA (48%) with a UL-94 rating of V-0. Moreover, CA/AgCl particularly displayed an efficiently smoke-suppressive feature by achieving a total smoke release value of 2.7 m 2 /m 2 , which was reduced by 91%, compared to CA. The antibacterial rates of the CA/AgCl nanocomposites against E. coli and S. aureus were measured to be 99.67% and 99.77%, respectively, while CA showed quite weak antibacterial rates. In addition, the flame-retardant and antibacterial mechanisms were analyzed and proposed based on the experimental data. This study provides a novel nanocomposite material with both flame-retardant and antibacterial properties which show promising application prospects in the fields of decorative materials and textile industry.

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Antimicrobial property and photocatalytic antibacterial mechanism of the TiO2-doped SiO2 hybrid materials under ultraviolet-light irradiation and visible-light irradiation

Cited by 57 publications

References 35 publications

Antibacterial properties of Ag/TiO2/PDA nanofilm on anodized 316L stainless steel substrate under illumination by a normal flashlight

Antibacterial properties of Ag/TiO2/PDA nanofilm on anodized 316L stainless steel substrate under illumination by a normal flashlight

Antimicrobial surfaces: a review of synthetic approaches, applicability and outlook

Simple and green synthesis of calcium alginate/AgCl nanocomposites with low-smoke flame-retardant and antimicrobial properties

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