Facile, single-pot preparation of nanoporous SiO2 particles (carrier) with AgNPs at core and crust for controlled disinfectant release

Haider, Michael; Shao, Godlisten N.; Ahmad, Ayyaz; Imran, Syed Muhammad; Abbas, Nadir; Abbas, Ghulam; Hussain, Manwar; Kim, Hee Taik

doi:10.1016/j.jscs.2019.02.005

Cited by 6 publications

(7 citation statements)

References 25 publications

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“…Our findings are in agreement with another report [ 18 ] demonstrating that the SiO 2 –Ag-based structure exhibits better antibacterial activity against Gram-positive bacteria compared to Gram-negative bacteria. This is because the outer cell membrane of Gram-negative bacteria is predominantly composed of lipopolysaccharides, lipoproteins, and phospholipids that can trap positively charged ions/molecules and prevent their easy penetration [ 9 ], whereas the outer cell membrane of Gram-positive bacteria is built from a porous layer consisting of peptidoglycan and teichoic acid. These pores are large enough to allow an unobstructed penetration of molecules and nanoparticles that cause bacterial death [ 19 ].…”

Section: Resultsmentioning

confidence: 99%

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Cetyltrimethylammonium Bromide (CTAB)-Loaded SiO2–Ag Mesoporous Nanocomposite as an Efficient Antibacterial Agent

et al. 2021

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To date, Ag-based nanomaterials have demonstrated a high potential to overcome antibiotic resistance issues. However, bare Ag nanomaterials are prone to agglomeration in the biological environment, which results in a loss of antibacterial activity over time. Furthermore, it is still challenging to collect small-sized Ag nanomaterials right after the synthesis process. In this study, spherical-shaped Ag nanoparticles (NPs) (~6–10 nm) were attached on the surface of cetyltrimethylammonium bromide (CTAB)-loaded mesoporous silica nanoparticles (MSNs) (~100–110 nm). Antibacterial activity tests suggested that the obtained nanocomposite can be used as a highly efficient antibacterial agent against both Gram-negative and Gram-positive bacterial strains. The minimum inhibitory concentration (MIC) recalculated to pure Ag weight in nanocomposite was found to be ~1.84 µg/mL (for Escherichia coli) and ~0.92 µg/mL (for Staphylococcus aureus)—significantly smaller compared to values reported to date. The improved antibacterial activity of the prepared nanocomposite can be attributed to the even distribution of non-aggregated Ag NPs per volume unit and the presence of CTAB in the nanocomposite pores.

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Section: Resultsmentioning

confidence: 99%

“…oryzae . In another report, researchers successfully utilized porous SiO 2 (150–250 nm) with Ag NPs (2–5 nm) against an E. coli strain [ 9 ]. It was shown that such a porous composite facilitates prolonged Ag + release and improved antibacterial activity.…”

Section: Introductionmentioning

confidence: 99%

Cetyltrimethylammonium Bromide (CTAB)-Loaded SiO2–Ag Mesoporous Nanocomposite as an Efficient Antibacterial Agent

et al. 2021

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“…Contemporary ancient references approved that the existence of ceramic water filters with safe storage elements have been extensively used in Latin America for more than 100 years and have been produced in Britain since 1850 (Sobsey et al 2008). Silver nanoparticles have been successfully used in water treatment applications (Haider et al 2019(Haider et al , 2016Hilonga et al 2018;Dang et al 2013). On the other hand, it has been discovered that the use of metal oxide is critical in the removal of organic contaminants from industrially contaminated water (Mutuma et al 2015).…”

Section: Fabrication Of Ceramic Water Filtermentioning

confidence: 99%

Efficiency of common filters for water treatment in Tanzania

et al. 2022

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Background Approximately 69% of population in Tanzania lacks better sanitation, while 45.6% lacks access to clean and safe water. To leverage this shortage, several technologies have been used for purifying water from various sources; however, there is still persistence of waterborne diseases. Main body This article reviewed the efficiency of common water filters in removing water contaminants such as Escherichia coli, fluoride, TSS, turbidity, nitrate, virus, BOD, COD, fecal coliform and color. Common water filters available in Tanzania markets include slow sand filter, ceramic filter, bone char, membrane purifier and bio sand filter. The effectiveness of each technology was evaluated in terms of its ability to remove water contaminants. Ceramic filter was found to be less expensive technology compared to the rest. Ineffectiveness of common water filters can be linked to persistence of waterborne diseases in Tanzania. Conclusion Ability of water filters in viral removal is of greater concern. This study suggests a ceramic filter as the best filter among all common filters available in Tanzania. Ceramic filters can be synthesized by locally available materials such as clay, saw dust, rice husk ashes and flour which make it efficient in removing all water contaminants, especially viruses.

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“…In 2019, Haider et al [52] proposed a single-pot protocol to prepare silica nanoparticles with silver at core and crust (SiNP-AgCC) around a previously produced silver nanoparticle template. The silver nanoparticles were prepared with AgNO 3 , produced with average diameters between 10-20 nm, followed by the addition of TEOS, through a Stöber modified method.…”

Section: Nanomaterials and Nanoparticles As Antiseptic And Disinfectantsmentioning

confidence: 99%

Ionic Systems and Nanomaterials as Antiseptic and Disinfectant Agents for Surface Applications: A Review

Faísca¹,

Filipe²,

Petrovski³

et al. 2021

Surfaces

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Antiseptics and disinfectants are extensively used for a variety of topical and hard-surface applications. A wide variety of biocides as active chemical agents is found in these products, including alcohols, phenols, iodine, and chlorine. Many of these active agents demonstrate broad-spectrum antimicrobial activity; however, the mode of action of these agents is not well-documented. This review is focused on several examples of ionic systems based on ionic surfactants and ionic liquids as well as nanomaterials and nanoparticles acting as antiseptics and disinfectants for surfaces. It is important to note that many of these biocides may be used singly or in combination in a variety of products, which vary considerably in activity against microorganisms. Antimicrobial activity can be influenced by several factors such as formulation effects, presence of an organic load, synergy, temperature, dilution, and test method. The most promissory compounds based on ionic systems and nanomaterials published in mainly the last decade is chronologically reported in this review.

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Facile, single-pot preparation of nanoporous SiO2 particles (carrier) with AgNPs at core and crust for controlled disinfectant release

Cited by 6 publications

References 25 publications

Cetyltrimethylammonium Bromide (CTAB)-Loaded SiO2–Ag Mesoporous Nanocomposite as an Efficient Antibacterial Agent

Cetyltrimethylammonium Bromide (CTAB)-Loaded SiO2–Ag Mesoporous Nanocomposite as an Efficient Antibacterial Agent

Efficiency of common filters for water treatment in Tanzania

Ionic Systems and Nanomaterials as Antiseptic and Disinfectant Agents for Surface Applications: A Review

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