Large scale synthesis of binary composite nanowires in the Mn 2 O 3 -SnO 2 system with improved charge storage capabilities

Vijayan, Bincy Lathakumary; Krishnan, Syam G.; Zain, Nurul Khairiyyah Mohd; Harilal, Midhun; Yar, Asfand; Misnon, Izan Izwan; Dennis, John Ojur; Yusoff, Mashitah M.; Jose, Rajan

doi:10.1016/j.cej.2017.06.171

Cited by 48 publications

(20 citation statements)

References 70 publications

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“…While for pure SnO 2 (Fig. S5 online), the spectrum was characterized by the presence of three peaks located at 476, 631 and 771 cm À1 , indexed to E g , A 1g and B 2g vibration modes, respectively [68]. Note that the Raman bands for the hybrids contained the respective peaks of both g-C 3 N 4 and SnO 2 , which confirmed the coexistence of g-C 3 N 4 and SnO 2 in the hybrids.…”

Section: Resultsmentioning

confidence: 63%

Facile synthesis of bimodal macroporous g-C3N4/SnO2 nanohybrids with enhanced photocatalytic activity

Chen

Jiang

et al. 2019

Science Bulletin

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Section: Resultsmentioning

confidence: 63%

Facile synthesis of bimodal macroporous g-C3N4/SnO2 nanohybrids with enhanced photocatalytic activity

Chen

Jiang

et al. 2019

Science Bulletin

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“…Tremendous effort have been done by researchers in order to improve energy and power densities of the device using TMOs due to their availability along with multiple electron transfer and variable oxidation states during faradaic reactions [2,3]. Among TMOs, MnO2based electrodes are considered as most preferable for SCs fabrication due to their environmental friendly, natural abundance, low cost, wide potential window, and good electrochemical performance compared to RuO2 electrode which is limited by its high cost and low abundance [2,[4][5][6][7]. Manganese oxides can be existed in several allotropes including  and λ due to the different arrangement of linkage of the basic [MnO6] octahedral unit.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Evaluation of Fluorinated MnO2 for Supercapacitor Application

Najwa

Khairiyyah

Misnon

et al. 2018

MATEC Web of Conferences

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Supercapacitors (SCs) functioning as alternative energy storage is useful in most electronic devices, renewable energy system and hybrid vehicles that have high demand in these days. Excellent electrochemical performance, environment friendliness and low cost material are needed to fulfil the energy demand by most developed country. In this study, fluorination treatment on manganese oxide (MnO2) is considered as an effective way to develop better energy storage due to fluorine electronegativity and reactivity when correlate with other element. Hydrothermal method is used to synthesis MnO2 (α–MnO2 and δ–MnO2) and the effect of fluorination (Fα–MnO2 and Fδ–MnO2) on MnO2 surfaces is investigated on the charge storage ability. The crystallinity and functional groups of the samples was confirmed by the X-ray diffractogram and fourier transforms infrared spectroscopy (FTIR). The cyclic voltammetry (CV) and galvanostatic charging–discharging (CDC) analysis in 0.5 M K2SO4 electrolyte shows that F-δ-MnO2 gives the highest Cs value of 184 F g-1 at scan rate of 5 mV s-1 and 66 F g-1 at current density of 0.3 A g-1. The electrochemical impedance spectroscopy shows that the Fδ–MnO2 has the lowest electrode resistances and charge transfer resistance which contributes to high Cs and the high conductivity of electrode.

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“…for energy conversion and storage applications. 35,[47][48][49][50] However, the present crystal/amorphous composite does not show the anticipated properties; the electrical conductivity of the Al(50%) was rather similar to that of pure am-Al 2 O 3 . Despite the inferior electrical conductivity of Al(50%), the sample showed interesting photoelectric properties as detailed subsequently.…”

Section: Resultsmentioning

confidence: 59%

“…We have recently successfully developed composite ceramic nanowires with a similar strategy but focusing on different properties (such as combining electrochemical activity and electrical conductivity, etc.) for energy conversion and storage applications . However, the present crystal/amorphous composite does not show the anticipated properties; the electrical conductivity of the Al(50%) was rather similar to that of pure am‐Al 2 O 3 .…”

Section: Resultsmentioning

confidence: 66%

Photocurrents in crystal‐amorphous hybrid stannous oxide/alumina binary nanofibers

et al. 2019

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Suppression of charge recombination by thin amorphous alumina layers on metal oxide semiconductors has demonstrated a vital role in electronic appliances beside its role as an insulator. This study reports effect of amorphous alumina (Al2O3) on the structural, electrical, and optical properties of stannous oxide (SnO2). The samples for the present study are prepared as nanofibers by electrospinning a polymeric solution containing aluminum and stannous precursors and subsequent annealing; six samples with varying concentrations of aluminum and stannous are considered. A crystal‐amorphous SnO2/Al2O3 hybrid system was confirmed by both XRD and XPS analysis. Both BET and Mott‐Schottky analysis showed increase in the surface area and conduction band minimum of the sample with increase in the Al content, however, at the expense of its electrical conductivity. The electron lifetime of the sample increased with increase in the Al content, but the electron transport time increase with decrease in the electrical conductivity of the sample. Both Urbach energy measurement and Stoke's shift showed generation of deeper trap state with increase in the Al content. Investigation on sample photovoltaic performance showed that the loss in electrical conductivity of the sample can be compensated by the improved surface area to a certain extent. Interestingly, a composite nanofiber containing equal molar fraction of aluminum and stannous showed orders of magnitude higher photocurrent despite its similar resistivity as that of pure alumina fibers, which is shown to originate from a Fermi energy gradient at the Al2O3/SnO2 interface.

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Large scale synthesis of binary composite nanowires in the Mn 2 O 3 -SnO 2 system with improved charge storage capabilities

Cited by 48 publications

References 70 publications

Facile synthesis of bimodal macroporous g-C3N4/SnO2 nanohybrids with enhanced photocatalytic activity

Facile synthesis of bimodal macroporous g-C3N4/SnO2 nanohybrids with enhanced photocatalytic activity

Electrochemical Evaluation of Fluorinated MnO2 for Supercapacitor Application

Photocurrents in crystal‐amorphous hybrid stannous oxide/alumina binary nanofibers

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