Synthesis of monodisperse silver nanoparticles and their self-assembly through simple thermal decomposition approach

Jeevanandam, P.; Srikanth, Chamarthi K.; Dixit, Suchi

doi:10.1016/j.matchemphys.2010.03.015

Cited by 49 publications

(21 citation statements)

References 59 publications

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“…In the past, number of methods such as chemical [1][2][3][4], photochemical [5][6][7][8] and thermal [9,10] have been developed to synthesize metallic nanoparticles. Recently an efficient method for fabrication of metallic nanoparticles from metallomicelles is reported [11].…”

Section: Introductionmentioning

confidence: 99%

Photobiological synthesis of noble metal nanoparticles using Hydrocotyle asiatica and application as catalyst for the photodegradation of cationic dyes

2015

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Solar light induced photo catalysis by plasmonic nanoparticles such as Au and Ag is an important field in green chemistry. In this study an environmental benign method was investigated for the rapid synthesis of colloidal Ag and AuNPs using the extract of Hydrocotyle asiatica, as a reducing and stabilizing agent under sunlight irradiation. The nanoparticles were formed in few seconds and were characterized by UV-Vis., FT-IR, TEM, EDAX, XRD, DLS and Zetasizer. The nanoparticles were stable in aqueous solution for more than 6 months. TEM analysis established that the Ag and AuNPs were predominantly spherical with average size of 21 and 8 nm, respectively. The flavonoids and glycosides from the extract of H. asiatica were proved to be responsible for the reduction and capping through FT-IR analysis. The antimicrobial studies of AgNPs showed effective inhibitory activity against the clinical strains of gram-negative and positive bacteria. The localized surface plasmon resonance of AgNPs was used for the photo-driven degradation of cationic dyes (malachite green and methylene blue). Thus, this green technique can be used for bulk production of AgNPs, and thus prepared nanoparticles may be used for removal of dyes from effluent. Graphical Abstract

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Section: Introductionmentioning

confidence: 99%

Photobiological synthesis of noble metal nanoparticles using Hydrocotyle asiatica and application as catalyst for the photodegradation of cationic dyes

2015

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“…The absorption bands in the wavenumber range of 2859–2922 cm −1 are attributed to the characteristic symmetric/asymmetric stretch vibrations of the methylene group of OA. Moreover, the broad peak at ~3435 cm −1 is assigned to absorbed H 2 O or OH groups . These FT‐IR data, in combination with the FT‐IR data of OA [Fig.…”

Section: Resultsmentioning

confidence: 77%

Synthesis of nanostructured lanthanum fluoborate modified by oleylamine and evaluation of its tribological properties as a lubricating additive in synthetic ester

Jin

Yang

Song

et al. 2016

Surface & Interface Analysis

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Lanthanum fluoborate modified by oleylamine [denoted as La(BF4)3‐OA] was synthesized as a potential lubricant additive by direct precipitation method with sodium tetrafluoroborate and lanthanum nitrate [La(NO3)3] as the staring materials and oleylamine (OA) as the surface‐modifying agent in distilled water‐ethanol mixed solvent. The effects of reaction temperature, OA to La(NO3)3 ratio, and surfactant cetyltrimethyl ammonium bromide on the size and shape of as‐synthesized La(BF4)3‐OA were investigated. The crystalline structure and morphology of as‐obtained La(BF4)3‐OA were characterized by X‐ray diffraction, transmission electron microscopy, Fourier transform infrared spectrometry, and X‐ray photoelectron spectroscopy. Moreover, the tribological properties of La(BF4)3‐OA as an additive in dioctyl sebacate, a synthetic ester, were evaluated with a four‐ball machine, and the worn surfaces of the steel balls were analyzed with a field emission scanning electron microscope equipped with an energy dispersive spectrometer accessory. It was found that the as‐synthesized La(BF4)3‐OA exhibits disk‐like nanoflake shape and have a diameter of 10–45 nm, depending on varying synthetic conditions. As‐synthesized La(BF4)3‐OA as an additive in DIOS possesses excellent antiwear and friction‐reduction performance for the steel–steel pair, which is because the as‐synthesized additive simultaneously contain tribologically active elements La, B, and F that facilitate the formation of a boundary lubricating and protecting film on sliding steel surfaces thereby avoiding direct contact of the steel–steel pair and significantly reducing the friction and wear. Copyright © 2016 John Wiley & Sons, Ltd.

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“…Different methods have been employed to prepare shape-and size-controlled suspensions of silver nanoparticles [39], including chemical reduction of silver salts in solution [40][41][42], thermal decomposition in organic solvents [43], biochemical reduction [44], chemical and photo-reduction in reverse micelles [45], 'nanosphere lithography' (NSL) [46], electrochemical reduction [47,48], photo-reduction [49], and microwave-assisted techniques [50]. Each method has typical advantages and disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Enhanced photocatalytic activity of mesoporous SiO2/TiO2 sol–gel coatings doped with Ag nanoparticles

Roldán

Castro

Pellegri

et al. 2015

J Sol-Gel Sci Technol

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In the present study, as-prepared silver nanoparticles have been incorporated into SiO 2 and TiO 2 sols. The characterisation of the silver nanoparticles was performed through transmission electron microscopy, grazing X-ray diffraction, and UV-visible spectroscopy, before and after mixing with the different sols. Multilayer coatings doped with silver nanoparticles were also prepared by combining different compositions and analysed by TEM and GXRD. The photocatalytic activity was studied through the degradation of methyl orange in aqueous solution under UV light exposure. High photocatalytic efficiency was observed for all the multilayer coatings. The highest efficiency was obtained for the Ag-SiO 2 /TiO 2 mesoporous system that reached a degradation percentage of methyl orange up to 94 % after 2.5 h of irradiation, near the complete elimination of the pollutant. The mechanism that explains the high photocatalytic efficiency of this multilayer coating is associated with the high porosity of the mesoporous coatings and with the increase in the local electric field, associated with the effect of plasmon resonance surface produced for the presence of metallic silver nanoparticles in the SiO 2 film.

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Synthesis of monodisperse silver nanoparticles and their self-assembly through simple thermal decomposition approach

Cited by 49 publications

References 59 publications

Photobiological synthesis of noble metal nanoparticles using Hydrocotyle asiatica and application as catalyst for the photodegradation of cationic dyes

Photobiological synthesis of noble metal nanoparticles using Hydrocotyle asiatica and application as catalyst for the photodegradation of cationic dyes

Synthesis of nanostructured lanthanum fluoborate modified by oleylamine and evaluation of its tribological properties as a lubricating additive in synthetic ester

Enhanced photocatalytic activity of mesoporous SiO2/TiO2 sol–gel coatings doped with Ag nanoparticles

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