Factors affecting the physicochemical properties of the modified core/shell NH2–SiO2@NZVI nanoparticles

Guan, Zeyu; Shu, Yajie; Ma, Yuanyuan; Wan, Jinquan

doi:10.1016/j.colsurfa.2015.03.057

Cited by 10 publications

(3 citation statements)

References 34 publications

(36 reference statements)

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“…There are several physicochemical properties of nanoparticles influencing the antimicrobial activities of nanoparticles, such as nanoparticle size, surface chemistry, shape, size distribution, morphology, agglomeration, and dissolution rate [ 107 ]. These physicochemical properties of nanoparticles can be controlled by regulating the conditions during the nanoparticle synthesis process, and several examples are described in Table 2 [ 108 , 109 , 110 ]. A size dependency of embedded silver nanoparticles (AgNPs) on antiviral activity against H1N1 influenza A virus had been demonstrated wherein a smaller size of AgNP showed stronger antiviral activity [ 92 ].…”

Section: Classes Of Antimicrobial Materials For Antimicrobial Coatingmentioning

confidence: 99%

Past and Current Progress in the Development of Antiviral/Antimicrobial Polymer Coating towards COVID-19 Prevention: A Review

et al. 2021

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The astonishing outbreak of SARS-CoV-2 coronavirus, known as COVID-19, has attracted numerous research interests, particularly regarding fabricating antimicrobial surface coatings. This initiative is aimed at overcoming and minimizing viral and bacterial transmission to the human. When contaminated droplets from an infected individual land onto common surfaces, SARS-CoV-2 coronavirus is able to survive on various surfaces for up to 9 days. Thus, the possibility of virus transmission increases after touching or being in contact with contaminated surfaces. Herein, we aim to provide overviews of various types of antiviral and antimicrobial coating agents, such as antimicrobial polymer-based coating, metal-based coating, functional nanomaterial, and nanocomposite-based coating. The action mode for each type of antimicrobial agent against pathogens is elaborated. In addition, surface properties of the designed antiviral and antimicrobial polymer coating with their influencing factors are discussed in this review. This paper also exhibits several techniques on surface modification to improve surface properties. Various developed research on the development of antiviral/antimicrobial polymer coating to curb the COVID-19 pandemic are also presented in this review.

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Section: Classes Of Antimicrobial Materials For Antimicrobial Coatingmentioning

confidence: 99%

Past and Current Progress in the Development of Antiviral/Antimicrobial Polymer Coating towards COVID-19 Prevention: A Review

et al. 2021

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“…The chemical bonds (Si-O-Si bonds) on the silica surface are unsaturated because the surface is active during synthesis. When silica functionalized with chitosan, the NH 2 -functional shell was covalently bounded to the surfaces of silica and the reducing ability of SiO 2 increased when functionalized with amino groups [39,40].…”

Section: Introductionmentioning

confidence: 99%

Comparative Antibacterial Effects of a Novel Copper and Silver- Based Core/Shell Nanostructure by Sonochemical Method

Karakuş¹,

Tan²,

İlgar³

et al. 2018

New Trends in Ion Exchange Studies

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In this study, the antibacterial effect of novel copper (Cu) and silver (Ag) metal-based coreshell nanostructures against Escherichia coli (E. coli-Gram negative) was investigated. The novel copper-and silver-based nanostructures were prepared separately by using nontoxic, biodegradable, and biocompatible biopolymers chitosan and guar gumpolyvinyl alcohol (GG-PVA), which were modified by inorganic phases SiO 2 and sepiolite. On the other hand, guar gum-PVA (GG-PVA) was modified by sepiolite, and this nanostructure was prepared only for silver. Besides, Cu was dispersed in a different biopolymer chitosan by sonochemical method in the presence and absence of SiO 2 .X-r a y photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and X-ray diffraction (XRD) techniques were used to characterize the surface chemistry and morphology of the core/shell nanostructure. Nanoscale zero-valent Cu (NZVCu) was found under thin CuO film according to the XPS results. SEM images showed that spherical Cu/CuO@SiO 2 nanostructures (100 nm) were homogenously dispersed in the chitosan by using sonochemical method. Antibacterial property of the core-shell nanostructures was analyzed by well-diffusion method against Escherichia coli (E. coli-Gram negative). Cu/CuO@SiO 2 nanostructures were found very effective against the E. coli due to high ratio of NZVCu in the nanostructure.

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“…TEOS is hydrolyzed under alkaline conditions, after the first ethoxy hydrolysis, the second ethoxy hydrolysis rate would gradually accelerate [17]. If the reaction time is insufficient, TEOS may only complete the first step of the reaction, causing incomplete hydrolysis an imprecise reticular structure, and a pore size too large to decrease antioxidation and the reducing capacity.…”

Section: Influence Of Hydrolysis Time In the Sio2-nzvi Preparation Prmentioning

confidence: 99%

Factors Affecting the Reductive Properties of the Core-Shell SiO2-Coated Iron Nanoparticles

Wu¹,

Li²,

Leng³

et al. 2016

ACES

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In this study, novel core-shell SiO 2 -coated iron nanoparticles (SiO 2 -nZVI) were synthesized using a one-step Stöber method. The Malachite green degradation abilities of the nanoparticles were investigated. The effects of ethanol/distilled water volume ratio, presence and absence of PEG, tetraethyl orthosilicate (TEOS) dosage, and hydrolysis time used in the nanoparticles preparation process were investigated. The results indicated that the SiO 2 -coated iron nanoparticles had the highest reduction activity when the particles synthesized with ethanol/H 2 O ratio of 2:1, PEG of 0.15 ml, TEOS of 0.5 ml and the reaction time was 4 h. The SiO 2 -nZVI nanoparticles were characterized using Transmission Electron Microscopy (TEM), Energy Dispersive Spectrometry (EDS) and powder X-Ray Diffraction (XRD). The results showed that the average particles diameter of the SiO 2 -nZVI was 20 -30 nm. The thickness of the outside SiO 2 film is consistent and approximately 10 nm. The results indicated that the nanoparticles coated completely with a transparent SiO 2 -film. Such nanoparticles could have wide applications in dye decolorization.

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Factors affecting the physicochemical properties of the modified core/shell NH2–SiO2@NZVI nanoparticles

Cited by 10 publications

References 34 publications

Past and Current Progress in the Development of Antiviral/Antimicrobial Polymer Coating towards COVID-19 Prevention: A Review

Past and Current Progress in the Development of Antiviral/Antimicrobial Polymer Coating towards COVID-19 Prevention: A Review

Comparative Antibacterial Effects of a Novel Copper and Silver- Based Core/Shell Nanostructure by Sonochemical Method

Factors Affecting the Reductive Properties of the Core-Shell SiO2-Coated Iron Nanoparticles

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