Preparation and Characterization of Nano-silver Loaded Montmorillonite with Strong Antibacterial Activity and Slow Release Property

Xu, Guangnian; Qiao, Xueliang; Qiu, Xiaolin; Chen, Jianguo

doi:10.1016/s1005-0302(11)60126-6

Cited by 45 publications

(18 citation statements)

References 27 publications

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“…The antibacterial activity of the Mt, PL-Mt30, 1800W-OMt and PL-OMt powders was determined using the E2149 test of the American Society for the Testing and Materials (ASTM), according to previous studies with some modifications [25][26][27][28][29]. The Gram-negative bacteria E. coli and Gram-positive bacteria B. subtilis were used as the reference strains and a bacterial dispersion with a density of 10 8 CFU/mL was prepared in the experiments.…”

Section: Determination Of Antibacterial Activity Of Modified Mtmentioning

confidence: 99%

Ultrasound-Assisted Preparation, Characterization, and Antibacterial Activity of Montmorillonite Modified by ε-Polylysine Hydrochloride

Yuan

Zhang

et al. 2019

Materials

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In this study, two types of antibacterial montmorillonites (Mt) were prepared using a facile method. The Mt modified with ε-polylysine hydrochloride (ε-PL) was named PL-Mt, while the Mt dually modified with dioctadecyl dimethylammonium chloride (D1821) and ε-PL was named PL-OMt. The results of the X-ray diffraction, Fourier-transform infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA) of the PL-Mt indicated that 30% ε-PL was the most suitable amount for intercalating the Mt. The particle size and distribution of the ε-PL in the solution demonstrated that the Mt d-value could not be further increased owing to the increasing ε-PL diameter. The result of the X-ray diffraction of PL-OMt displayed that ultrasonic treatment at 600 W facilitated ε-PL to intercalate into the OMt interlayer space. The PL-OMt prepared with ultrasonic treatment at 600 W exhibited antibacterial activity against Escherichia coli and Bacillus subtilis superior to that of the PL-OMt prepared with higher-power ultrasonic treatment. Thus, the addition of 30% ε-PL based on the dry Mt mass is the most suitable ratio for preparing PL-Mt, while ultrasonic treatment at 600 W is the most suitable for preparing PL-OMt. These findings may expand the application fields of ε-PL.

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Section: Determination Of Antibacterial Activity Of Modified Mtmentioning

confidence: 99%

Ultrasound-Assisted Preparation, Characterization, and Antibacterial Activity of Montmorillonite Modified by ε-Polylysine Hydrochloride

Yuan

Zhang

et al. 2019

Materials

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“…Besides, there is not any change of the positions of specific peaks. This presents that Ag nanoparticles have a good distribution on the TNTs surface [13] and Ag nanoparticles don't replace Ti atoms position in the crystal structure of TNTs [2]. …”

Section: The Effect Of Photoreduction Time On the Formation Of Ag/tntsmentioning

confidence: 96%

THE FABRICATION OF Ag NANOPARTICLES LOADED TiO2 NANOTUBES BY PHOTOREDUCTION METHOD AND THEIR PHOTOCATALYTIC ACTIVITY

Pham¹

2018

JST

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In this paper, we survey the effect of the photoreduction (illumination) time and the annealing temperature on the formation of Ag nanoparticles supported on TiO 2 nanotubes (Ag/TNTs). The morphology, crystal structure and compositions were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS), respectively. The results showed that Ag nanoparticles are supported on TNTs and the amount of Ag nanoparticles could be controlled. The morphology of TNTs can be changed by the photoreduction time and the annealing temperature.

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“…14,15 Recently, selenium has been gaining importance in the field of nanomaterials due its semiconductive, photoelectric, photoconductive, and catalytic properties. [20][21][22] Selenium nanoparticles can be synthesized using different approaches, from physical methods, such as laser ablation, 23,24 ultraviolet radiation, 25 and hydrothermal techniques, to chemical methods, such as acid decomposition, catalytic reduction, and precipitation. 18,19 Moreover, the use of selenium nanoparticles is more efficient than organoselenium compounds (such as selenols [R-SeH], and diselenides [R-Se-Se-R] or selenides [R-Se-R]) at controlling cellular events.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of biogenic selenium nanoparticles with antimicrobial properties made by Staphylococcus aureus, methicillin‐resistant Staphylococcus aureus (MRSA), Escherichia coli, and Pseudomonas aeruginosa

Medina-Cruz

Webster

2018

J Biomedical Materials Res

114

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Antimicrobial resistance is a global concern that affects more than two million people each year. Therefore, new approaches to kill bacteria are needed. One of the most promising methodologies may come from metallic nanoparticles, since bacteria may not develop a resistance to these nanostructures as they do for antibiotics. While metallic nanoparticle synthesis methods have been well studied, they are often accompanied by significant drawbacks such as cost, extreme processing conditions, and toxic waste production since they use harsh chemicals such as corrosive agents (hydrazine) or strong acids (hydrochloride acid). In this work, we explored the environmentally safe synthesis of selenium nanoparticles, which have shown promise in killing bacteria. Using Escherichia coli, Pseudomonas aeruginosa, Methicillin-resistance Staphylococcus aureus, and S. aureus, 90-150 nm average diameter selenium nanoparticles were synthesized using an environmentally safe approach. Nanoparticles were characterized using transmission electron microscopy, energy dispersive X-ray spectroscopy to determine the chemical composition, and inductively coupled plasma mass spectrometry to validate chemistry. Nanoparticles were also characterized and tested for their ability to inhibit bacterial growth. A decay in bacterial growth after 24 h was achieved against both S. aureus and E. coli at biogenic selenium nanoparticle concentrations from 25 to 250 µg/mL and showed no significant cytotoxicity effect against human dermal fibroblasts for 24 h. Bacteria were able to synthesize selenium nanoparticles through the use of different functional structures within the organisms, mainly enzymes such as selenite reductases. Therefore, biogenic selenium nanoparticles made by bacteria represent a viable approach to reduce bacteria growth without antibiotics overcoming the drawbacks of synthetic methods that employ toxic chemicals. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 1400-1412, 2018.

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Preparation and Characterization of Nano-silver Loaded Montmorillonite with Strong Antibacterial Activity and Slow Release Property

Cited by 45 publications

References 27 publications

Ultrasound-Assisted Preparation, Characterization, and Antibacterial Activity of Montmorillonite Modified by ε-Polylysine Hydrochloride

Ultrasound-Assisted Preparation, Characterization, and Antibacterial Activity of Montmorillonite Modified by ε-Polylysine Hydrochloride

THE FABRICATION OF Ag NANOPARTICLES LOADED TiO2 NANOTUBES BY PHOTOREDUCTION METHOD AND THEIR PHOTOCATALYTIC ACTIVITY

Synthesis and characterization of biogenic selenium nanoparticles with antimicrobial properties made by Staphylococcus aureus, methicillin‐resistant Staphylococcus aureus (MRSA), Escherichia coli, and Pseudomonas aeruginosa

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