Green Biosynthesis of Silver Nanoparticles Using ‘Polygonum Hydropiper’ and Study its Catalytic Degradation of Methylene Blue

Bonnia, Noor Najmi; Kamaruddin, M.S.; Nawawi, M.H.; Ratim, Suzana; Azlina, H. N.; Ali, Ernie Suzana

doi:10.1016/j.proche.2016.03.058

Cited by 92 publications

(31 citation statements)

References 13 publications

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“…Therefore, the photo-reduction, which reported in others studies, was not occurred. 19,[74][75][76] Furthermore, in the present study, used concentration of dye was higher than other reported studies.…”

Section: Discussioncontrasting

confidence: 64%

“…In this study, the possible reasons for the low catalytic activity of biosynthesized AuNPs can be attributed to the applied form of NPs (powder form) without NaBH 4 and sunlight as reducing and inducing agent in the reduction of MB. Therefore, the photo‐reduction, which reported in others studies, was not occurred . Furthermore, in the present study, used concentration of dye was higher than other reported studies.…”

Section: Discussioncontrasting

confidence: 60%

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Biological applications of phytosynthesized gold nanoparticles using leaf extract of Dracocephalum kotschyi

Chahardoli

Karimi

Fattahi

et al. 2018

J Biomedical Materials Res

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In this work, biosynthesis potentials of Dracocephalum kotschyi leaf extract for the production of gold nanoparticle (AuNPs) were studied, and the biological (catalytic, antibacterial, antioxidant, and anticancer) activities of studied AuNPs were evaluated. Different analytical techniques including UV–visible spectroscopy, X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), energy dispersive X‐ray analysis, and transmission electron microscopy (TEM) were used for the characterization of AuNPs. Moreover, Different testing methods were used for evaluating biological activities of biosynthesized AuNPs. The formation of AuNPs was confirmed by color change and UV–visible spectroscopic analysis. Field emission (FE)‐SEM and TEM images were used to characterize phytosynthesized AuNPs which were predominantly spherical in shape with size in the range of 5–21 nm. These spherical NPs were found to be 39.79 ± 5 nm in size as determined by dynamic light scattering particle size analyzer. XRD pattern confirms the crystalline nature of the biosynthesized nanoparticles. The phytoconstituents involved in the reduction and stabilization of nanoparticles have been identified using FTIR spectra. The phytosynthesized AuNPs showed effective antioxidant, antibacterial and catalytic reduction activities. Furthermore, they have inhibited H1229 and MCF‐7 cancer cell lines proliferation in a dose‐dependent manner. These results have supported that D. kotschyi leaf extract was very efficient for the synthesis of AuNPs, and synthesized NPs showed enhanced biological activities which make them suitable for biomedical applications. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 621–630, 2019.

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Section: Discussioncontrasting

confidence: 64%

Section: Discussioncontrasting

confidence: 60%

Biological applications of phytosynthesized gold nanoparticles using leaf extract of Dracocephalum kotschyi

Chahardoli

Karimi

Fattahi

et al. 2018

J Biomedical Materials Res

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“…Many studies have attempted to use different kind of plant‐based reducing agents and have successfully synthesized AgNPs ,. Among of these plant, Parkia speciosa ( P. speciosa ) extract shows good potential as reducing agent owing to the presence of active organic compounds such as phenolic (50‐85 wt.%), flavonoids (5‐6 wt.%), saponins and tannins which is vital for reduction of metal ions and following by capping of AgNPs .…”

Section: Figurementioning

confidence: 99%

Parkia speciosa as Reduction Agent in Green Synthesis Silver Nanoparticles

et al. 2018

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Synthesis of nanoparticles based on plant extract as reduction agent has been discovered extensively due to its environmental friendly approach. In this work, a facile silver nanoparticles is synthesized via incorporation of silver nitrate aqueous solution with Parkia speciosa leaves extract. Centrifugation is introduces to improve the characteristics of nanoparticles. Chemical interactions have identified –OH stretching vibration, C=O and C=C, proving the presence of phenolic, terpenoid and flavonoid capped on silver nanoparticles. The TEM result demonstrates the silver nanoparticles had consistence spherical nanoparticles shape with average particles size (59.96 nm) in accordance with FESEM analysis. The structural analysis by XRD shows the nanoparticles had high degree of crystallinity (97%) and crystallite size (17.95 nm). The optical analysis by UV‐Vis reveals that the nanoparticle produces brown colour solution with high absorption band (465 nm). This proves that Parkia speciosa extract has potential as reduction agent in synthesis of silver nanoparticles.

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“…Additionally, FT-IR spectra of AgNPs also revealed disapperance of absorption bands previously observed in CLW extract at 1508.12 cm −1 and 1078.93 cm −1 indicating that functional groups in proteins and flavonoids could also be the possible attributing factors. FT-IR spectra of AgNPs also displayed additional low intensity peaks at 2926.27 cm −1 , 2854.65 cm −1 , 1036.39 cm −1 and 1008.24 cm −1 that correspond to C-H bond stretching, bending vibrations of C-OH and C-O bonds respectively [17,46]. These reducing functional groups have been reported to facilitate formation of stable metal nanoparticles due to their strong affinity towards metal ions.…”

Section: Ft-ir Analysismentioning

confidence: 99%

“…Colloidal silver particles have been reported to act as effective antimicrobial agents against bacteria and viruses [11,[13][14][15]. They also possess promising catalytic activity, which enable them to degrade harmful synthetic dyes such as methylene blue (MB), congo red, methyl orange and methyl red [2,3,11,[16][17][18][19]. Additionally, they have also been shown to act as efficient sensors for detecting heavy metals like mercury and copper ions [20,21].…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of silver nanoparticles using cauliflower waste and their multifaceted applications in photocatalytic degradation of methylene blue dye and Hg2+ biosensing

Kadam¹,

et al. 2020

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Green synthesis of silver nanoparticles (AgNPs) using plant extracts has emerged as a viable environment-friendly method. The aim of the study was to biosynthesize AgNPs using cauliflower (Brassica oleracea var. botrytis) waste extract and further test their potential applications in photocatalytic degradation of methylene blue (MB) dye and Hg 2+ biosensing. Optimum extract concentration, AgNO 3 concentration, pH and temperature required for biosynthesis of stable AgNPs were determined by UV-visible spectroscopy. FT-IR, XRD, SEM, TEM, SAED, XPS and BET analysis were performed for characterizing AgNPs. MB dye degradation using AgNPs was determined by analyzing the intensity of dye absorption maxima at 664 nm. Specificity and sensitivity of biosynthesized AgNPs for Hg 2+ ions were studied for assessing their biosensing abilities. Optimum conditions needed for biosynthesis of stable AgNPs were observed to be 3 ml extract, 0.5 mM AgNO 3 , pH 8.5 and microwave-assisted heating at 600 W for 5 min. FT-IR analysis showed that the extract contained necessary functional groups that facilitated biosynthesis of AgNPs. XRD, SEM, TEM, SAED, XPS results confirmed the formation of AgNPs. BET analysis showed that AgNPs had an average size of 35.08 nm and surface area of 19.22 m 2 /g. Maximum MB dye degradation percentage of 97.57% was obtained at 150 min without any significant silver leaching thereby, signifying notable photocatalytic property of AgNPs. Biosensing studies showed that AgNPs were specifically able to detect up to 0.1 mg/l Hg 2+ ions. In summary, cauliflower waste served as a useful source of reducing agents for biosynthesizing AgNPs with promising environmental applications.

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Green Biosynthesis of Silver Nanoparticles Using ‘Polygonum Hydropiper’ and Study its Catalytic Degradation of Methylene Blue

Cited by 92 publications

References 13 publications

Biological applications of phytosynthesized gold nanoparticles using leaf extract of Dracocephalum kotschyi

Biological applications of phytosynthesized gold nanoparticles using leaf extract of Dracocephalum kotschyi

Parkia speciosa as Reduction Agent in Green Synthesis Silver Nanoparticles

Green synthesis of silver nanoparticles using cauliflower waste and their multifaceted applications in photocatalytic degradation of methylene blue dye and Hg2+ biosensing

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