Green synthesis of manganese oxide nanoparticles for the electrochemical sensing of p-nitrophenol

Kumar, Vineet; Singh, Kulvinder; Panwar, Shaily; Mehta, Surinder Kumar

doi:10.1007/s40089-017-0205-3

Cited by 84 publications

(31 citation statements)

References 43 publications

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“…The intensity of the band is seen to be a function of the amount of D. graveolens extract used in the reaction and the increase in the extracts concentration led to an increase in the synthesis of MnO NPs. According to Kumar et al [21] most of the MnO NPs were synthesised in 30 min and further time did not affect the reaction. Polynomial equations summarised the influence of each factor, and it can be found considering the sign and magnitude of each parameter, e.g.…”

Section: Resultsmentioning

confidence: 99%

“…Lots of natural and synthetic polymers are being used as stabilising agents to prevent metal NPs from sedimentation, agglomeration, and oxidation [16]. Manganese NPs (MnO NPs) are being widely used in wastewater treatment, rechargeable batteries, and sensors of p-nitrophenol, molecular sieve, magnetic materials, and catalysis [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Optimisation of green synthesis of MnO nanoparticles via utilising response surface methodology

Souri

Hoseinpour

Shakeri

et al. 2018

IET nanobiotechnol.

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This study concerns the optimisation of green synthesis of manganese oxide nanoparticles (MnO NPs) with (L.) extract via response surface methodology (RSM). Central composite design was used to evaluate the effect of pH, time, and the extract to the metal ratio on the synthesised nanoparticles (NPs). Nine runs were designed to investigate the effect of each parameter while NPs were synthesised under different conditions. Considering the-values (-value < 0.05), it is indicated that the extract to the metal ratio was the most effective parameter. The synthesised NPs were characterised using UV-vis. Synthesis of the NPs by polyphenolic compounds of green reducing agent and their stabilisation by curcumin was confirmed by Fourier transform infrared spectra and the surface morphology of the spherical MnO NPs was studied by field-emission scanning electron microscopy and transmission electron microscope techniques. The present researchers claimed the optimal condition as follows: time = 56.7 min, pH = 7.2, and the extract to the metal ratio = 87.9 v/v. MnO NPs at optimum condition were then employed for degradation of industrial dyes and they showed high dye degradation activity against Rhodamine B and light green dye. The average size of the synthesised MnO NPs at optimal condition was claimed to be nearly 38 nm.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimisation of green synthesis of MnO nanoparticles via utilising response surface methodology

Souri

Hoseinpour

Shakeri

et al. 2018

IET nanobiotechnol.

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“…Metallic nanoscales, like nanomaterials, have attracted much interest in academia and engineering because of their physicochemical properties [5]. Mn oxides can be employed in molecular sieves, solar cells, optoelectronics, drug delivery ion sieves, as well as other fields such as imaging contrast agents, magnetic storage devices, and water treatment and purification, due to their privileged physical and chemical properties [4,[6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Procedure optimization for green synthesis of manganese dioxide nanoparticles by Yucca gloriosa leaf extract

et al. 2018

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In this paper, a simple, efficient, and eco-friendly procedure for the green synthesis of manganese dioxide nanoparticles (MnO 2 NPs) by Yucca gloriosa leaf extract is described. The effect of three different factors such as pH of the metallic solution, time, and extract ratio was studied. Optimizing the factors was done by Response Surface Methodology (RSM). Considering the results, the ratio of the extract to the metallic solution and the time was the most important factors for the synthesis of MnO 2 NPs. The optimal condition was claimed to be time = 120 min, pH 6, and extract ratio = 90%. Then, the MnO 2 NPs re-synthesized using Y. gloriosa leaf extract and stabilized using turmeric extract. Crystal phase identification of the MnO 2 NPs was characterized by XRD analysis and the formation of crystalline MnO 2 has been confirmed. In addition, XRD study confirms the attendance of MnO 2 NPs with around size of 32 nm. Furthermore, FESEM and TEM analyses showed that the synthesized MnO 2 NPs have the spherical shape.

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“…The appearance of a pair of redox peaks at 0.22 V(R1) and 0.26 V(O1) and an irreversible oxidation peak at −0.6 V(R2) for PNP indicates, a three-step electrochemical process undergoing on the surface of AgGr-600/GCE. Kumar et al ., obtained a reversible PNP oxidation (O1), reduction (R1) peaks at 0.12 and 0.04 V also an irreversible reduction peak (R2) at −0.69 V with MnO NPs/BCA/gold electrode 28 . The redox mechanism of PNP on AgGr/GCE can be explained in Scheme 1 as provided in the earlier literature by Liu et al .…”

Section: Resultsmentioning

confidence: 94%

Capacitive and Sensing Responses of Biomass Derived Silver Decorated Graphene

Bhujel

Rai

Baruah

et al. 2019

Sci Rep

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A new, easy and green method is utilized for producing silver decorated graphene for its application in sensors and supercapacitors. The biomass-derived silver decorated graphene (AgGr) samples are prepared using an APCVD reactor with varying the process temperature from 600 to 800 °C. The as-synthesized AgGr samples were then characterized by AFM, SEM, Raman spectroscopy, FTIR spectroscopy, XRD, cyclic voltammetry and impedance spectroscopy. The interlayer spacing and ID/IG ratio of the AgGr samples varied from 3.6 to 3.7 Å and 0.87 to 1.52, respectively, as the process temperature was raised from 600 to 800 °C. The SEM image shows the distribution of the flower-like structure of Ag flakes in the graphene sheet for the AgGr-800 sample. Also, the greater number of active sites on the surface of AgGr-800 and the presence of a higher number of defects makes it least useful for p-nitrophenol sensing due to the excess opening of the CV curve but has a maximum capacitance of 93.5 Fg−1 in 1 M H2SO4. AgGr-600 showed extremely good sensing of p-nitrophenol than the other AgGr samples. Therefore this novel technique can be utilized for the large scale manufacture of various metal decorated graphene samples for their application in different fields.

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Green synthesis of manganese oxide nanoparticles for the electrochemical sensing of p-nitrophenol

Cited by 84 publications

References 43 publications

Optimisation of green synthesis of MnO nanoparticles via utilising response surface methodology

Optimisation of green synthesis of MnO nanoparticles via utilising response surface methodology

Procedure optimization for green synthesis of manganese dioxide nanoparticles by Yucca gloriosa leaf extract

Capacitive and Sensing Responses of Biomass Derived Silver Decorated Graphene

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