Synthesis and characterization of Ag@SiO 2 core-shell nanoparticles for antibacterial and environmental applications

Alimunnisa, J.; Ravichandran, K.; Meena, K.S.

doi:10.1016/j.molliq.2017.01.103

Cited by 61 publications

(33 citation statements)

References 31 publications

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“…The crystal plane {111} facet is more intense because of its predominant orientation than the other peaks. Debye-Scherer equation was used to determine the average size of Ag@SiO 2 NPs (as indicated in eqn (5)) 42,43 which was indicated to be 60 nm.…”

Section: Characterization Of Ag@sio 2 Core-shell Nanospheresmentioning

confidence: 99%

Silicone/Ag@SiO₂core–shell nanocomposite as a self-cleaning antifouling coating material

et al. 2018

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The effects of Ag@SiO 2 core-shell nanofiller dispersion and micro-nano binary structure on the selfcleaning and fouling release (FR) in the modelled silicone nano-paints were studied. An ultrahydrophobic polydimethylsiloxane/Ag@SiO 2 core-shell nanocomposite was prepared as an antifouling coating material. Ag@SiO 2 core-shell nanospheres with 60 nm average size and a preferential {111} growth direction were prepared via a facile solvothermal and a modified Stöber methods with a controlled shell thickness. Ag@SiO 2 core-shell nanofillers were inserted in the silicone composite surface via solution casting technique. A simple hydrosilation curing mechanism was used to cure the surface coating.Different concentrations of nanofillers were incorporated in the PDMS matrix for studying the structureproperty relationship. Water contact angle (WCA) and surface free energy determinations as well as atomic force microscopy and scanning electron microscope were used to investigate the surface selfcleaning properties of the nanocomposites. Mechanical and physical properties were assessed as durability parameters. A comparable study was carried out between silicone/spherical Ag@SiO 2 coreshell nanocomposites and other commercial FR coatings. Selected micro-foulants were used for biological and antifouling assessments up to 28 days. Well-distributed Ag@SiO 2 core-shell (0.5 wt%) exhibited the preferable self-cleaning with WCA of 156 and surface free energy of 11.15 mN m À1.

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Section: Characterization Of Ag@sio 2 Core-shell Nanospheresmentioning

confidence: 99%

Silicone/Ag@SiO₂core–shell nanocomposite as a self-cleaning antifouling coating material

et al. 2018

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“…Most metal oxides that have been coated with silica are ZnO [27,28], CuO [29], NiO [30], TiO [31]. Very little research has been devoted to the fabrication of silica coated magnesium oxide [32][33][34][35]. Recently different methods were used for preparations of MgO@SiO 2 core-shell or Mg-SiO 2 composites using the sol-gel process [35,36].…”

Section: Introductionmentioning

confidence: 99%

Silica, Mesoporous Silica and Its Thiol Functionalized Silica Coated MgO and Mg(OH)2 Materials

et al. 2019

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Silica (SiO 2) and mesoporous silica (mSiO 2) coated magnesium oxide composites were prepared based on hydrolysis and co-condensation of tetraethylorthosilicate (TEOS) in presence of magnesium oxide nanoparticles (MgO-NPs) and cetyltrimethylammonium bromide (CTAB). Functionalization with thiolorganofunctional silane precursor was conducted onto the surface of mesosilica (Scheme 1). Silica coated MgO composites and its thiol functionalized material have been characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope, Fourier transform spectroscopy (FTIR), ultra violet-visible spectra and thermal analysis (TGA). TEM analysis showed that the MgO nanoparticles were encapsulated into the SiO 2 or mSiO 2 precursors. XRD analysis reveals that magnesium oxide are exist into both forms, cubic MgO-structure and hexagonal Mg(OH) 2-structure, which is converted into cubic structure upon silica coating. The mean crystallite size of MgO-NPs remains almost unchanged after coating with silica precursors. TGA and FTIR results indicated that the coated mesosilica layer around magnesium oxide nanoparticles has been successfully grafted by thiolorganofunctional silane groups.

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“…In the recent years, the study on the synthesis of Ag nanoparticles has progressed rapidly, since the materials have many potential applications. The uses of Ag nanoparticles include as antibacterial agents [1][2], colorimetric sensing [3], solar cells [4], catalysts [5], etc. To meet the applications, the colloids of Ag nanoparticles must have suitable physical and chemical properties such as homogeneous shape, small and narrow particle size, and is stable for a long period.…”

Section: Introductionmentioning

confidence: 99%

Effect of Reducing Agents on Physical and Chemical Properties of Silver Nanoparticles

et al. 2018

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Silver nanoparticles having uniform size and shape, a diameter range of 10–50 nm, excellent stability, and high zeta potential are always desirable for many applications. The silver nanoparticles were synthesized by chemical reduction method using some reducing agents in a polyvinyl alcohol solution. This study aims at determining the effect of reducing agents on the chemical and physical properties of silver nanoparticles. Ascorbic acid, sodium borohydride, hydrazine, sodium citrate, and glucose were used as reducing agents. Surface Plasmon Resonance (SPR) absorbance, morphology, zeta potential, crystal system, and stability of the products were studied. The results showed that the chemical and physical properties of the colloidal Ag nanoparticles were dependent on the reducing agents. In general, the produced silver nanoparticles have an fcc crystal system with a unit cell of 4.0906–4.0992 Å. The SPR absorbance of the colloids has the peak in the range of 401–433 nm. We found that the colloid of silver nanoparticles prepared by using ascorbic acid has uniform spherical shape, the diameter of about 20 nm, and zeta potential of -10.4 mV. After being stored for one month, the SPR absorbance of the colloid decreased by only 5%. This type of colloidal Ag nanoparticles prepared by using ascorbic acid is expected to be used for chemical sensors, an antibacterial agent, and so on.

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Synthesis and characterization of Ag@SiO 2 core-shell nanoparticles for antibacterial and environmental applications

Cited by 61 publications

References 31 publications

Silicone/Ag@SiO₂core–shell nanocomposite as a self-cleaning antifouling coating material

Silicone/Ag@SiO₂core–shell nanocomposite as a self-cleaning antifouling coating material

Silica, Mesoporous Silica and Its Thiol Functionalized Silica Coated MgO and Mg(OH)2 Materials

Effect of Reducing Agents on Physical and Chemical Properties of Silver Nanoparticles

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Synthesis and characterization of Ag@SiO 2 core-shell nanoparticles for antibacterial and environmental applications

Cited by 61 publications

References 31 publications

Silicone/Ag@SiO2core–shell nanocomposite as a self-cleaning antifouling coating material

Silicone/Ag@SiO2core–shell nanocomposite as a self-cleaning antifouling coating material

Silica, Mesoporous Silica and Its Thiol Functionalized Silica Coated MgO and Mg(OH)2 Materials

Effect of Reducing Agents on Physical and Chemical Properties of Silver Nanoparticles

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Silicone/Ag@SiO₂core–shell nanocomposite as a self-cleaning antifouling coating material

Silicone/Ag@SiO₂core–shell nanocomposite as a self-cleaning antifouling coating material