Morphological study of microwave-assisted facile synthesis of gold nanoflowers/nanoparticles in aqueous medium and their catalytic application for reduction of p-nitrophenol to p-aminophenol

The naturally occurring biomolecules present in the plant extracts have been identified to play an active role in the single step formation of nanoparticles with varied morphologies and sizes which is greener and environmentally benign. In the present work, spherical zinc oxide nanoparticles (ZnO NPs) of 2-4nm size were synthesized using aqueous extract of fallen Jacaranda mimosifolia flowers (JMFs), treated as waste. The microwave assisted synthesis was completed successfully within 5min. Thereafter, phase identification, morphology and optical band gap of the synthesized ZnO NPs were done using X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM) and UV-Visible spectroscopy techniques. The composition of JMFs extract was analyzed by gas chromatography-mass spectrometry (GC-MS) and the ZnO NPs confirmation was further explored with fourier transform infrared spectroscopy (FTIR). The GC-MS results confirmed the presence of oleic acid which has high propensity of acting as a reducing and capping agent. The UV-Visible data suggested an optical band gap of 4.03eV for ZnO NPs indicating their small size due to quantum confinement. Further, facet specific adsorption of oleic acid on the surface of ZnO NPs was studied computationally to find out the impact of biomolecules in defining the shape and size of NPs. The viability of gram negative Escherichia coli and gram positive Enterococcus faecium bacteria was found to be 48% and 43%, respectively at high concentration of NPs.

show abstract

“…The household microwave ovens also lead to formation of metal and metal oxide NPs with good crystallinity and optical properties [41,42].…”

Section: Resultsmentioning

confidence: 99%

Biosynthesis of ZnO nanoparticles using Jacaranda mimosifolia flowers extract: Synergistic antibacterial activity and molecular simulated facet specific adsorption studies

Sharma

Sabela

Kanchi

et al. 2016

Journal of Photochemistry and Photobiology B: Biology

151

View full text Add to dashboard Cite

show abstract

“…XRD shows the diffraction peaks at 2 theta value of 38.5 o , 44.7 o , 64.9 o , 77.8 o and 82.0 o correspond to (111), (200), (220), (311) and (222) phases (Figure ) (JCPDS card no. 04–0784) . Peak corresponding to (111) plane has the height intensity, suggesting the predominant orientation of (111) plane in the Au NPs.…”

Section: Resultsmentioning

confidence: 99%

Ultrasound Assisted Synthesis of Gold Nanoparticles as an Efficient Catalyst for Reduction of Various Nitro Compounds

2017

Self Cite

View full text Add to dashboard Cite

A simple, one step and economical protocol for the synthesis of gold nanoparticles (Au NPs) have been developed via ultrasound probe sonicator with dimethyl sulfoxide (DMSO) as reducing agent as well as capping agent. Notably there is no need of additional surfactant or stabilizer for the synthesis of Au NPs. Size of the particles was controlled by varying the irradiation intervals of sonication. Spherical nanoparticles with uniform particle size ranging from 15–40 nm were achieved within short reaction time. The surface morphology, phase identification and chemical composition of the prepared Au NPs were characterized by Field emission gun‐scanning electron microscopy (FEG‐SEM), X‐ray diffraction (XRD) and energy dispersive X‐ray spectroscopy (EDS). The catalytic activity of the prepared gold catalyst was tested for the degradation of aromatic nitro compounds at room temperature. All the reactions were monitored using UV‐Vis spectrophotometer. Comprehensive UV‐Vis data for all the reduction reactions has been presented.

show abstract

“…The former employs boiling sodium citrate and the sodium borohydride with organic solvents. Gold nanoparticles with various shapes including nanoplates [19], nanoflowers [20,21], nanostars [22], spinous [23] and nanorods [24] are known. Recently triangular gold and silver nanoplates have attracted increased attention due to their extremely high anisotropy and localized surface plasmon resonance (LSPR) properties [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Size controlled synthesis of gold nanostructures using ketones and their catalytic activity towards reduction of p-nitrophenol

2016

Self Cite

View full text Add to dashboard Cite

Morphological study of microwave-assisted facile synthesis of gold nanoflowers/nanoparticles in aqueous medium and their catalytic application for reduction of p-nitrophenol to p-aminophenol

Cited by 28 publications

References 43 publications

Biosynthesis of ZnO nanoparticles using Jacaranda mimosifolia flowers extract: Synergistic antibacterial activity and molecular simulated facet specific adsorption studies

Biosynthesis of ZnO nanoparticles using Jacaranda mimosifolia flowers extract: Synergistic antibacterial activity and molecular simulated facet specific adsorption studies

Ultrasound Assisted Synthesis of Gold Nanoparticles as an Efficient Catalyst for Reduction of Various Nitro Compounds

Size controlled synthesis of gold nanostructures using ketones and their catalytic activity towards reduction of p-nitrophenol

Contact Info

Product

Resources

About