Synthesis and characterization of silver/talc nanocomposites using the wet chemical reduction method

Shameli, Kamyar; Ahmad, Mansor Bin; Yunus, Wan Zin Wan; Ibrahim, Nor Azowa; Darroudi, Majid

doi:10.2147/ijn.s13227

Cited by 108 publications

(42 citation statements)

References 38 publications

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“…A broad peak was due to the presence of van der Waals interactions between the hydroxyl groups in the zeolite structure related to H 2 O and the partial positive charge on the surface of Ag NPs. 8 These peaks, with the enhanced Ag NPs in the Ag/zeolite NCs (A2, A4, and A5), shifted to low wave numbers, and the peak intensity decreased. Fourier transform infrared spectra of zeolite and silver/zeolite nanocomposites (A2 1.0%, A4 2.0%, and A5 5.0%).…”

Section: Figure 5 Transmission Electron Microscopy Images Of A) Zeolimentioning

confidence: 95%

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Fabrication of silver nanoparticles doped in the zeolite framework and antibacterial activity

Shameli¹,

Ahmad²,

Zargar³

et al. 2011

IJN

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143

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Using the chemical reduction method, silver nanoparticles (Ag NPs) were effectively synthesized into the zeolite framework in the absence of any heat treatment. Zeolite, silver nitrate, and sodium borohydride were used as an inorganic solid support, a silver precursor, and a chemical reduction agent, respectively. Silver ions were introduced into the porous zeolite lattice by an ion-exchange path. After the reduction process, Ag NPs formed in the zeolite framework, with a mean diameter of about 2.12–3.11 nm. The most favorable experimental condition for the synthesis of Ag/zeolite nanocomposites (NCs) is described in terms of the initial concentration of AgNO 3 . The Ag/zeolite NCs were characterized by ultraviolet-visible spectroscopy, powder X-ray diffraction, transmission electron microscopy, scanning electron microscopy, energy dispersive X-ray fluorescence, and Fourier transform infrared. The results show that Ag NPs form a spherical shape with uniform homogeneity in the particle size. The antibacterial activity of Ag NPs in zeolites was investigated against Gram-negative bacteria (ie, Escherichia coli and Shigella dysentriae ) and Gram-positive bacteria (ie, Staphylococcus aureus and methicillin-resistant Staphylococcus aureus ) by disk diffusion method using Mueller–Hinton agar at different sizes of Ag NPs. All of the synthesized Ag/zeolite NCs were found to have antibacterial activity. These results show that Ag NPs in the zeolite framework can be useful in different biological research and biomedical applications.

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Section: Figure 5 Transmission Electron Microscopy Images Of A) Zeolimentioning

confidence: 95%

“…These classifications are described as nanocomposites (NCs). 3 There are different types of NCs depending on the phases of constituents, eg, metal/polymer, 4 metal/metal, 5 metal/metal oxides, 6 metal/clay, 7,8 and metal/zeolite.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of silver nanoparticles doped in the zeolite framework and antibacterial activity

Shameli¹,

Ahmad²,

Zargar³

et al. 2011

IJN

Self Cite

143

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“…There are several ways to reduce Ag + , eg, use of γ-rays, 4 ultraviolet (UV) irradiation, 5 heating and electrochemical reduction, 6 and application of reducing chemicals, such as hydrazine, 7 sodium borohydride, [8][9][10] polyethylene glycerol, 11 N,N-dimethylformamide, 12 glucose, 13 ethylene glycol, 14 formaldehyde, 15 and sodium in liquid ammonia. 16 However, there is still need for a more economic, commercially viable, and environmentally green synthesis route to synthesize Ag-NPs.…”

Section: Introductionmentioning

confidence: 99%

Green biosynthesis of silver nanoparticles using Curcuma longa tuber powder

Shameli

Ahmad

Zamanian

et al. 2012

IJN

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327

164

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Green synthesis of noble metal nanoparticles is a vastly developing area of research. Metallic nanoparticles have received great attention from chemists, physicists, biologists, and engineers who wish to use them for the development of a new-generation of nanodevices. In this study, silver nanoparticles were biosynthesized from aqueous silver nitrate through a simple and eco-friendly route using Curcuma longa tuber-powder extracts, which acted as a reductant and stabilizer simultaneously. Characterizations of nanoparticles were done using different methods, which included ultraviolet-visible spectroscopy, powder X-ray diffraction, transmission electron microscopy, scanning electron microscopy, energy-dispersive X-ray fluorescence spectrometry, and Fourier-transform infrared spectroscopy. The ultraviolet-visible spectrum of the aqueous medium containing silver nanoparticles showed an absorption peak at around 415 nm. Transmission electron microscopy showed that mean diameter and standard deviation for the formation of silver nanoparticles was 6.30 ± 2.64 nm. Powder X-ray diffraction showed that the particles are crystalline in nature, with a face-centered cubic structure. The most needed outcome of this work will be the development of value-added products from C. longa for biomedical and nanotechnology-based industries.

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“…In particular, its interlayer space has been used for the synthesis of material and biomaterial NPs as the support for anchoring transition metal complex catalysts and as adsorbents for cationic ions. 30,31 In addition, various production methods have been described for the synthesis of Ag-NP colloids using silver salt as the initial materials; for instance, chemical reduction, [32][33][34][35] aerosol spraying technique, 36 reverse micelle, 37 lamellar liquid crystal, 38 microemulsion, 39 micelle, 40 capping agent method, 41 and photochemical reduction (ie, microwave, 42 electron beam, 43 ultraviolet (UV)-irradiation, 44,45 and γ-irradiation). [46][47][48] Of these techniques, the use of γ-irradiation in the preparation of Ag-NPs has been demonstrated to have a number of highly advantageous properties compared with conventional chemical and photochemical methods, namely:…”

Section: Introductionmentioning

confidence: 99%

Synthesis of silver/montmorillonite nanocomposites using γ-irradiation

Shameli¹,

Ahmad²,

Yunis³

et al. 2010

IJN

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126

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Silver nanoparticles (Ag-NPs) were synthesized into the interlamellar space of montmorillonite (MMT) by using the γ-irradiation technique in the absence of any reducing agent or heat treatment. Silver nitrate and γ-irradiation were used as the silver precursor and physical reducing agent in MMT as a solid support. The MMT was suspended in the aqueous AgNO 3 solution, and after the absorption of silver ions, Ag + was reduced using the γ-irradiation technique. The properties of Ag/MMT nanocomposites and the diameters of Ag-NPs were studied as a function of γ-irradiation doses. The interlamellar space limited particle growth (d-spacing [d s ] = 1.24-1.42 nm); powder X-ray diffraction and transmission electron microscopy (TEM) measurements showed the production of face-centered cubic Ag-NPs with a mean diameter of about 21.57-30.63 nm. Scanning electron microscopy images indicated that there were structure changes between the initial MMT and Ag/MMT nanocomposites under the increased doses of γ-irradiation. Furthermore, energy dispersive X-ray fluorescence spectra for the MMT and Ag/ MMT nanocomposites confirmed the presence of elemental compounds in MMT and Ag-NPs. The results from ultraviolet-visible spectroscopy and TEM demonstrated that increasing the γ-irradiation dose enhanced the concentration of Ag-NPs. In addition, the particle size of the Ag-NPs gradually increased from 1 to 20 kGy. When the γ-irradiation dose increased from 20 to 40 kGy, the particle diameters decreased suddenly as a result of the induced fragmentation of Ag-NPs. Thus, Fourier transform infrared spectroscopy suggested that the interactions between Ag-NPs with the surface of MMT were weak due to the presence of van der Waals interactions. The synthesized Ag/MMT suspension was found to be stable over a long period of time (ie, more than 3 months) without any sign of precipitation.

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Synthesis and characterization of silver/talc nanocomposites using the wet chemical reduction method

Cited by 108 publications

References 38 publications

Fabrication of silver nanoparticles doped in the zeolite framework and antibacterial activity

Fabrication of silver nanoparticles doped in the zeolite framework and antibacterial activity

Green biosynthesis of silver nanoparticles using Curcuma longa tuber powder

Synthesis of silver/montmorillonite nanocomposites using γ-irradiation

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Synthesis and characterization of silver/talc nanocomposites using the wet chemical reduction method

Cited by 108 publications

References 38 publications

Fabrication of silver nanoparticles doped in the zeolite framework and antibacterial activity

Fabrication of silver nanoparticles doped in the zeolite framework and antibacterial activity

Green biosynthesis of silver nanoparticles using Curcuma longa tuber powder

Synthesis of silver/montmorillonite nanocomposites using &gamma;-irradiation

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Synthesis of silver/montmorillonite nanocomposites using γ-irradiation