Dual Activities of Nano Silver Embedded Reduced Graphene Oxide Using Clove Leaf Extracts: Hg<sup>2+</sup> Sensing and Catalytic Degradation

Sahu, Deepak; Sahoo, Gyanaranjan; Mohapatra, Priyaranjan; Swain, Sarat K.

doi:10.1002/slct.201803725

Cited by 24 publications

(6 citation statements)

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“…The zeta potential measurement is carried out to find the surface charge and stability of colloidal particles . Figure ‐a and Figure ‐b show the zeta potential study of Au NPs, and Au/PVA nanocomposites respectively.…”

Section: Resultssupporting

confidence: 56%

Nano Gold Hybrid Polyvinyl Alcohol Films for Sensing of Cu²⁺ ions

et al. 2019

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An efficient and eco‐friendly approach is adopted for the synthesis of highly stable L‐alanine assisted nano gold based polyvinyl alcohol nanocomposite hybrid films (Au/PVA).The –COOH groups of L‐alanine and oxygeneous groups of polyvinyl alcohol are utilized for the synthesis of size controlled gold nanoparticles. The as‐synthesized nanocomposites show rapid and selective detection of Cu2+ ion in aqueous medium. With addition Cu2+ ion to as‐synthesized nanocomposites, the SPR peaks of Au NPs (538 nm) decrease with occurrence of a red shift as well as a new peak is observed at higher wavelength which is due to the aggregation of gold nanoparticles in the nanocomposites hybrid films. Scanning electron microscope (SEM) micrograph and energy dispersive spectroscopy (EDS) reveal the aggregation of gold nanoparticles in the nanocomposite hybrid films. The limit of detection and limit of quantification for Cu2+ ion are 40 nM and 133 nM respectively. This technique for detection of Cu2+ ion in waste water samples is inexpensive and eco‐friendly since no any toxic chemicals are used. In the presence of Cu2+ ion, the colour of the hybrid film is changed hence, this method also involves visual detection of Cu2+ ion without use of electrolyte or transducer. Further, many reported methods represent the in situ monitoring of Cu2+ ion, but the present hybrid film can be used for in situ as well as ex situ monitoring of Cu2+ ion.

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Section: Resultssupporting

confidence: 56%

Nano Gold Hybrid Polyvinyl Alcohol Films for Sensing of Cu²⁺ ions

et al. 2019

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“…At the same time, the material is also a ected by the printing speed and extrusion speed. e speed ratio can change the thickness of the material [20]. e following will reset the proportional relationship between the printing speed and the extrusion speed of the printer for composite materials, and select the appropriate printing accuracy [21].…”

Section: D Printingmentioning

confidence: 99%

Preparation of Graphene Nanosilver Composites for 3D Printing Technology

Liang

2022

Advances in Materials Science and Engineering

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At present, graphene in two-dimensional carbon nanomaterials is a material with excellent properties. Its preparation technology and application prospects are very wide. The most common one is the chemical redox method, which can make graphite into graphite oxide dispersed in water. Graphene oxide obtained by the Hummers method has a wrinkled structure. In order to broaden the application field of graphene and give full play to its excellent properties, the current research on graphene mainly focuses on the preparation and application of functional composite materials as a matrix material or reinforcement material. Due to its special two-dimensional structure, it has a large specific surface area, good biocompatibility, and stable physical and chemical properties, making it an excellent nanoparticle carrier. The graphene-supported silver nanoparticles can effectively prevent the aggregation and stacking between particles, improve the electrochemical performance of the composite material, and expand its application range. In this article, the assisted preparation of graphene nanosilver composites by 3D printing technology (three-dimensional printing) was studied. 3D printing technology is a rapid prototyping technology that emerged in the 1980s. 3D printing technology is based on discrete stacking and realizes rapid processing of models by directly outputting data from the printing device. In this article, a new type of graphene oxide (GO) was prepared by the modified Hummers method. In the case of NaOH aqueous solution as a catalyst, silver nitrate and GO were used as precursors, and XRD, infrared spectrum, Raman spectrum, and other methods were used. The crystal structure and morphology of Ag/rGO under different conditions were studied, thus revealing the growth of silver particles and the changes of oxidized functional groups under different conditions. It was found that the intensity of the two peaks in the GNs-Ag-2 Raman spectral curve was seven times that of the GNs peak.

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“…First, the GO-AgNPs were characterized by Uv-vis ( Figure 7A ), and GO was introduced as a control. It was found that the Uv-vis spectrum of GO has an obvious absorption peak at 230 nm, representing the π→π* transition of the C-C bond in GO ( Sahu, et al, 2019 ). The Uv-vis spectra of GO-AgNPs have characteristic peaks at 230 and 410 nm, the former is the characteristic peak of GO, and the latter is the surface plasmon resonance peak of AgNPs.…”

Section: Resultsmentioning

confidence: 99%

“…Zeta potential is the potential generated by the distributed charges around the nanoparticle, and the Zeta potential of the nanoparticle is an vital indicator of its stability, and its numerical value directly shows the stability of the nanoparticle in colloidal suspension ( Sahu, et al, 2019 ). The GO-AgNPs were characterized by DLS and the Zeta potential of the GO-AgNPs was measured to be −16.8 mV (Figure 8F).…”

Section: Resultsmentioning

confidence: 99%

“…Biosynthesis of AgNPs generally uses plant-derived natural products or microorganisms as stabilizers and reducing agents, wherein AgNPs are synthesized on the surface of GO. The biosynthesis method has received much attention owing to the advantages of high efficiency, convenience and environmental protection ( Sahu, et al, 2019 ; Veisi, et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

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In Situ Green Synthesis of Graphene Oxide-Silver Nanoparticles Composite with Using Gallic Acid

Bao

Tian

et al. 2022

Front. Chem.

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The adoption of plant-derived natural products to synthesize metal nanoparticles and their complexes has the advantages of mild reaction conditions, environmental protection, sustainability and simple operation compared with traditional physical or chemical synthesis methods. Herein, silver nanoparticles (AgNPs) were in situ synthesized on the surface of graphene oxide (GO) by a “one-pot reaction” to prepare graphene oxide-silver nanoparticles composite (GO-AgNPs) based on using AgNO3 as the precursor of AgNPs and gallic acid (GA) as the reducing agent and stabilizer. The size and morphology of GO-AgNPs were characterized by ultraviolet-visible spectrophotometer (Uv-vis), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscope (TEM), X-ray diffractometer (XRD) and dynamic light scattering (DLS). The effects of pH, temperature, time and material ratio on the synthesis of GO-AgNPs were investigated experimentally. The results showed that ideal GO-AgNPs could be prepared under the conditions of pH = 9, 45°C, 2 h and the 2:1 of molar ratio of AgNO3 to GA. The AgNPs within GO-AgNPs are highly crystalline spherical particles with moderate density on the surface of GO, and the size of AgNPs is relatively uniform and determined to be about 8.19 ± 4.21 nm. The research results will provide new ideas and references for the green synthesis of metal nanoparticles and their complexes using plant-derived natural products as the reducing agent and stabilizer.

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Dual Activities of Nano Silver Embedded Reduced Graphene Oxide Using Clove Leaf Extracts: Hg²⁺ Sensing and Catalytic Degradation

Cited by 24 publications

References 58 publications

Nano Gold Hybrid Polyvinyl Alcohol Films for Sensing of Cu²⁺ ions

Nano Gold Hybrid Polyvinyl Alcohol Films for Sensing of Cu²⁺ ions

Preparation of Graphene Nanosilver Composites for 3D Printing Technology

In Situ Green Synthesis of Graphene Oxide-Silver Nanoparticles Composite with Using Gallic Acid

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Dual Activities of Nano Silver Embedded Reduced Graphene Oxide Using Clove Leaf Extracts: Hg2+ Sensing and Catalytic Degradation

Cited by 24 publications

References 58 publications

Nano Gold Hybrid Polyvinyl Alcohol Films for Sensing of Cu2+ ions

Nano Gold Hybrid Polyvinyl Alcohol Films for Sensing of Cu2+ ions

Preparation of Graphene Nanosilver Composites for 3D Printing Technology

In Situ Green Synthesis of Graphene Oxide-Silver Nanoparticles Composite with Using Gallic Acid

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Product

Resources

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Dual Activities of Nano Silver Embedded Reduced Graphene Oxide Using Clove Leaf Extracts: Hg²⁺ Sensing and Catalytic Degradation

Nano Gold Hybrid Polyvinyl Alcohol Films for Sensing of Cu²⁺ ions

Nano Gold Hybrid Polyvinyl Alcohol Films for Sensing of Cu²⁺ ions