Zea mays lea silk extract mediated synthesis of nickel oxide nanoparticles as positive electrode material for asymmetric supercabattery

Nwanya, Assumpta C.; Ndipingwi, Miranda M.; Ikpo, Chinwe O.; Obodo, Raphael M.; Nwanya, Stephen C.; Botha, Subelia; Ezema, Fabian I.; Iwuoha, Emmanuel I.; Mâaza, M.

doi:10.1016/j.jallcom.2019.153581

Cited by 109 publications

(42 citation statements)

References 60 publications

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“…Miller confirmed the formation of NiO NPs and is associated with a charge transfer from the band of conduction to the band of valence cations [10,14]. Direct bandgap was computed using the formula Eg = 1240/ k and was amounted to 3.39 eV whereby Eg is the optical band gap, with 1240 being the value of the photon energy while k is the wavelength.…”

Section: Methodsmentioning

confidence: 79%

“…Consequently, an alternative and environmentally benign synthesis route that adheres to the green chemistry approach involving phytoexudes or extracts is becoming a popular approach for nanoparticles synthesis and advocated for its rapidity, simplicity, minimized energy intensity thus reduced synthesis costs with minimum waste generation to produce the desired metal oxides NPs [8][9][10]. Plant extracts such as those from Callistemon viminalis (Weeping bottlebrush) Sageretia thea (Osbeck), Aspalathus linearis (Rooibos), Agathosma betulina (Buchu), Aegle marmelos L. (Bael) have been used as capping, reducing, chelating, and stabilizing agents for NiO nanoparticles [4,[11][12][13][14] except leaves extract from Rosmarinus officinalis, commonly known as rosemary has not been reported in the literature as a viable source for the synthesis of Bunsenite to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of structural and optical properties of biosynthesized Zincite (ZnO) nanoparticles (NPs) via an aqueous extract of Rosmarinus officinalis (rosemary) leaves

et al. 2020

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Biosynthesized Zincite nanoparticles have been successfully demonstrated by a completely green process mediated aqueous extract of rosemary leaves acting as both reducing and stabilizing agents and zinc nitrate hexahydrate as the precursor. The synthesis was free of solvents and surfactants to adhere to green chemistry principles and the impartation of environmental benignity. To achieve our objective, structural and optical investigations of ZnO annealed at 500°C for 2hrs were carried-out using complementary techniques. High resolution transmission electron microscopy (HRTEM) revealed the self-assembled, highly agglomerated quasi-hexagonal shaped NPs and the average particle size was found to peak at 15.62 ± 0.22 nm. Selected area electron diffraction (SAED) and X-ray diffraction (XRD) exhibited several diffraction rings with clear diffraction spots confirming their polycrystallinity and the purity of ZnO NPs with a wurtzite structure. Furthermore, the energy dispersive X-ray spectroscopy (EDS) substantiated the presence of Zn and O in the sample and attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) illustrated the Zn-O chemical bonds. From UV-Vis-NIR, the optical band gap was amounted to 3.2 eV and photoluminescence (PL) emission spectrum to 2.9eV with high surface defects and oxygen vacancies. Through these results, the use of rosemary leaves extract is hereby shown to be a cost-effective and environmentally friendly alternative to synthesize Zincite nanoparticles (ZnO NPs).

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Section: Methodsmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Investigation of structural and optical properties of biosynthesized Zincite (ZnO) nanoparticles (NPs) via an aqueous extract of Rosmarinus officinalis (rosemary) leaves

et al. 2020

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“…These results indicate that these electrodes maintained small resistance, this may be credited to GO added during the synthesis, which enlarged electrodes conductivity and reduced resistance [15]. In all the Nyquist plots obtained, semicircle did not manifest, indicating lower charge transfer resistance of the electrodes and revealing great pseudo capacitive properties of these electrodes [34].…”

Section: Resultsmentioning

confidence: 71%

Performance Evaluation of Graphene Oxide Based Co₃O₄@GO, MnO₂@GO and Co₃O₄/MnO₂@GO Electrodes for Supercapacitors

et al. 2020

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Hydrothermally synthesized electrodes of Co 3 O 4 @GO, MnO 2 @GO and Co 3 O 4 /MnO 2 @GO were produced for usages in supercapacitors. Graphene oxide (GO) was incorporated in the nanocomposites used for electrodes synthesis due to its great surface area and electrical conductivity. The synergistic alliance among these composites and GO enhance electrodes performance, life span and stability. The structural properties as obtained from the X-ray diffraction (XRD) results suggest that nanocomposites are crystalline in nature. The morphological studies indicated that the nanocomposites have platelet nanoparticles with some agglomerations. The energy bandgaps estimated for the Co 3 O 4 @GO, MnO 2 @GO and Co 3 O 4 /MnO 2 @GO are 2.38 eV, 2.05 eV and 2.33 eV respectively The electrochemical studies provided highest specific capacitance from CV using 10 mV/s scan rates and GCD using 1.0 A/g current density were 765, 1215, 1518 and 975, 1358, 1718 F/g for Co 3 O 4 @GO, MnO 2 @GO and Co 3 O 4 /MnO 2 @GO respectively. These results obviously indicate that composites perform better than single transition metal oxide and the addition of graphene oxide enhanced electrodes performance.

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“…The principles of green chemistry as proposed by Anastas and Warner 37 ultimately aim to use sustainable and greener materials and concepts to shield our surroundings from hazardous chemicals and processes. The detailed description of the aqueous extract of the Zea mays lea plant utilized in the synthesis, the phytochemicals present in the extract as well as the bio‐redox processes that yielded the complex metal oxide have been reported in our previous studies 3,38‐40 . We tested the biosynthesized material in an aqueous sodium ion battery in a Swagelok‐like cell using commercially available titanium dioxide (TiO 2 ) (Degussa P25) as the negative electrode.…”

Section: Introductionmentioning

confidence: 99%

Impedance studies of biosynthesized Na_0.₈Ni₀_.₃₃Co₀_.₃₃Mn₀_.₃₃O₂applied in an aqueous sodium‐ion battery

et al. 2021

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Summary We studied Na0.8Ni0.33Co0.33Mn0.33O2 nanoparticles synthesized using water‐based extract procured from the dried silk of maize (Zea mays lea) plant. The synthesized Na0.8Ni0.33Co0.33Mn0.33O2 was used as the positive electrode in an aqueous sodium ion battery (SIB). X‐ray diffraction (XRD) studies of the biosynthesized material reveal that it can be indexed to the trigonal structure of Na0.8Ni 0.33Co0.33Mn0.33O2 with an R 3m space group (160), (ICSD 184736) although impurities of Mn2O3 and NiO were detected. Surface morphological studies from a scanning electron microscope (SEM) disclose that the nanoparticles consist of an interspersion of sheath‐like particles with quasi‐spherical nanoparticles of uneven dimensions. The sheath‐like particles seem to agglomerate to form layers that coalesce into flower‐like structures that are spread within the quasi‐spherical nanoparticles. The material yielded a rechargeable discharge capacity of about 86 mA h g−1 in a three‐electrode system consisting of platinum, the Na0.8Ni0.33Co0.33Mn0.33O2 and Ag/AgCl as the counter, working and reference electrodes respectively at a current density of 10 mA g−1. However, a full cell using P25 Degussa TiO2 and the biosynthesized Na0.8Ni0.33Co0.33Mn0.33O2 as the negative and the positive electrode, respectively, and having a mass ratio of 1:1 yielded a discharge capacity of 49 mA h g−1 at a current density of 5 mA g−1. Impedance studies for a symmetrical cell developed showed that the magnitude of the impedance is highest at 0% and 100 state of charge (SOC).

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Zea mays lea silk extract mediated synthesis of nickel oxide nanoparticles as positive electrode material for asymmetric supercabattery

Cited by 109 publications

References 60 publications

Investigation of structural and optical properties of biosynthesized Zincite (ZnO) nanoparticles (NPs) via an aqueous extract of Rosmarinus officinalis (rosemary) leaves

Investigation of structural and optical properties of biosynthesized Zincite (ZnO) nanoparticles (NPs) via an aqueous extract of Rosmarinus officinalis (rosemary) leaves

Performance Evaluation of Graphene Oxide Based Co₃O₄@GO, MnO₂@GO and Co₃O₄/MnO₂@GO Electrodes for Supercapacitors

Impedance studies of biosynthesized Na_0.₈Ni₀_.₃₃Co₀_.₃₃Mn₀_.₃₃O₂applied in an aqueous sodium‐ion battery

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Zea mays lea silk extract mediated synthesis of nickel oxide nanoparticles as positive electrode material for asymmetric supercabattery

Cited by 109 publications

References 60 publications

Investigation of structural and optical properties of biosynthesized Zincite (ZnO) nanoparticles (NPs) via an aqueous extract of Rosmarinus officinalis (rosemary) leaves

Investigation of structural and optical properties of biosynthesized Zincite (ZnO) nanoparticles (NPs) via an aqueous extract of Rosmarinus officinalis (rosemary) leaves

Performance Evaluation of Graphene Oxide Based Co3O4@GO, MnO2@GO and Co3O4/MnO2@GO Electrodes for Supercapacitors

Impedance studies of biosynthesized Na0.8Ni0.33Co0.33Mn0.33O2applied in an aqueous sodium‐ion battery

Contact Info

Product

Resources

About

Performance Evaluation of Graphene Oxide Based Co₃O₄@GO, MnO₂@GO and Co₃O₄/MnO₂@GO Electrodes for Supercapacitors

Impedance studies of biosynthesized Na_0.₈Ni₀_.₃₃Co₀_.₃₃Mn₀_.₃₃O₂applied in an aqueous sodium‐ion battery