Synthesis of multifunctional graphene exhibiting excellent sonochemical dye removal activity, green and regioselective reduction of cinnamaldehyde

Kurmarayuni, Chandra Mohan; Kurapati, Swarnalatha; Akhil, Syed; Byram, Chandu; Khandapu, Bala Murali Krishna; Rao, Koya Prabhakara; Bollikolla, Hari Babu

doi:10.1016/j.matlet.2019.127224

Cited by 9 publications

(11 citation statements)

References 14 publications

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“…For this purpose, XRD patterns of GO and KRG−Au nanocomposite were depicted in Figure 3. The XRD prototype of the GO peak is endorsed at 2θ value 11.22(002) [3] . In KRG−Au nanocomposite, the particular peak substantially faded and a new band was emanated at 2θ value 24.6, which was close to the unoxidized graphite.…”

Section: Resultsmentioning

confidence: 93%

“…The multiple parts of this plant have many medicinal qualities due to the presence of various bioactive molecules. The aqueous KA stem extract (KAE) was an asset resource of phytochemicals such as alkaloids, carbohydrates, flavonoids, polyphenols and sterols and it was previously utilized as a green reducing and stabilizing agent in the synthesis of RGO [3] . In the present work, the KAE was employed in the synthesis of reduced graphene oxide‐gold nanocomposite (KRG−Au NC) by the reduction of graphene oxide (GO) and gold ions.…”

Section: Introductionmentioning

confidence: 99%

“…A well-known carbon material, graphene with its 2D lamellar sheet structure and remarkable biological, electrical, mechanical and thermal properties found numerous applications in the biomedical fields in the recent past. [1][2] The large specific surface of graphene is exploited to immobilize [3] various metals to enhance their stability and biological applications. [4] Accordingly, graphene incorporated with several metals (Ag, Cu, Pd, Zn, Mn, Fe, Ni, Pt, Cd, Co etc.)…”

Section: Introductionmentioning

confidence: 99%

“…The aqueous KA stem extract (KAE) was an asset resource of phytochemicals such as alkaloids, carbohydrates, flavonoids, polyphenols and sterols and it was previously utilized as a green reducing and stabilizing agent in the synthesis of RGO. [3] In the present work, the KAE was employed in the synthesis of reduced graphene oxide-gold nanocomposite (KRGÀ Au NC) by the reduction of graphene oxide (GO) and gold ions. Further, total antioxidant activity (TAA), DPPH radical scavenging activity and zone of inhibition (in mm) against selected bacterial pathogens were investigated for the antioxidant and antibacterial activity of KRGÀ Au nanocomposite.…”

Section: Introductionmentioning

confidence: 99%

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Studies on the Antioxidant and Antibacterial Activities of In Situ Green Synthesized Graphene‐Gold Nanocomposite

et al. 2021

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The current protocol is focused on the fabrication and applications of gold nanoparticles (Au NPs) distributed on graphene sheets with an emphasis on green synthesis using Kigelia Africana (KA) stem extract. The reducing and stabilizing molecules present in the stem of the KA plant were involved in the transformation of metal ions and graphene oxide in to metal nanoparticles anchored on to reduced graphene oxide sheets. Thus, the obtained graphene‐gold nanocomposite was investigated using sophisticated characterization techniques such as UV‐Visible, Infra‐Red, XRD, Raman, SEM and HRTEM techniques. All these techniques proved the formation of graphene‐gold nanocomposite with the characteristic spectroscopic peaks of graphene and gold. The graphene‐gold nanocomposite exhibited superior antioxidant activity than ascorbic acid standard thus finds medical application as a potential antioxidant agent. Moreover, the nanocomposite also showed good antibacterial activity against five pathogens. These results suggest that the in situ green synthesized graphene‐gold nanocomposite can be used as efficient antibacterial and antioxidants for controlling pathogenic microbes.

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Section: Resultsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Studies on the Antioxidant and Antibacterial Activities of In Situ Green Synthesized Graphene‐Gold Nanocomposite

et al. 2021

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“…Therefore, several manuscripts focused on the removal of these colored effluents were reported by researchers. Many treatment technologies have been developed for the decolorization [10] and degradation of dyes in wastewater effluents, using chemical adsorption [11], electrochemical process [12], bio-adsorption [13], biodegradation [14], sonochemical process [15]and ________________________________________________ Egypt. J. Chem.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of dark and photoreactions on the removal and photo-decolorization of azo carmosine dye (E122) as food dye using Rutile- TiO2 suspension

et al. 2021

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Dark and photoreactions have been employed to handle the various hazardous organic water contaminants as Synergistic technologies. The removal (dark reaction) and the photo-decolorization ( photoreaction) of azo carmosine dye (E122) as a food dye in an aqueous solution using Rutile-TiO2 and UV-A light were investigated in this work. Various parameters such as oxidant agents and temperature were determined. In dark reaction, the adsorption capacity and percentage of carmoisine dye removal elevated with the depressing of the temperature. This dark reaction of carmoisne dye is exothermic, physical adsorption, less random, non-spontaneous, and quick response with low activation energy. The maximum value removal % is reached to 86 % when addition mixing of Fe(II) and H2O2 to dye solution. In photoreaction, the same oxidant agents were applied in the dye solution and found the reaction is a pseudo-first-order kinetic, exothermic reaction, fast (low activation energies), less random, and spontaneous. The maximum percentage of decolorization with the addition of mixing of Fe(II) and H2O2 equal to 64.28% at 30 min.

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Rosehip‐Extract‐Assisted Green Synthesis and Characterization of Reduced Graphene Oxide

Mindivan

Göktaş

2020

ChemistrySelect

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Reduced‐graphene oxide (RGO) is one of the main derivatives of graphene. Chemical‐based techniques are used to produce large amounts of graphene in short amount of time. Hydrazine is the strong reductant but its toxic effects limit the various applications. Therefore, the usage of plants extracts has become the research interest in recent years for produced eco‐friendly materials. GO was synthesized through modified Hummer's method in this study and rosehip extracts were synthesized with successful reduction reaction in different environments. The comparison of the all analysis results from RGO samples were suggested that the rosehip extract in methanol environment is very effective in obtaining RGO. EDS and BET surface results indicated that ML‐RGO and MD‐RGO samples which synthesis by methanol extraction, had the highest C/O ratios (4 : 1 and 7 : 1) and surface areas (230.64 and 142.85 m2/g‐1), respectively as compared to other RGO samples. The ML‐RGO exhibited about a 41.14 % residual weight at 600 °C and had the highest thermal stability. The interlayer spacing of the diffraction peaks of MD‐RGO and ML‐RGO samples expanded due to a decrease of the re‐stacking in graphene sheets. FESEM and HRTEM images of the MD‐RGO and ML‐RGO samples confirmed the flat surface with fewer layers and transparent‐ well exfoliated sheets. Therefore, we have validated the practicality of rosehip extract for versatile application and advocates new hopes for greener graphene.

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Synthesis of multifunctional graphene exhibiting excellent sonochemical dye removal activity, green and regioselective reduction of cinnamaldehyde

Cited by 9 publications

References 14 publications

Studies on the Antioxidant and Antibacterial Activities of In Situ Green Synthesized Graphene‐Gold Nanocomposite

Studies on the Antioxidant and Antibacterial Activities of In Situ Green Synthesized Graphene‐Gold Nanocomposite

Synergistic Effect of dark and photoreactions on the removal and photo-decolorization of azo carmosine dye (E122) as food dye using Rutile- TiO2 suspension

Rosehip‐Extract‐Assisted Green Synthesis and Characterization of Reduced Graphene Oxide

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