Microwave synthesis and electrochemical characterization of mesoporous carbon@Bi2O3 composites

Xia, Nannan; Yuan, Dingsheng; Zhou, Tianxiang; Chen, Jingxing; Mo, Shanshan; Liu, Yingliang

doi:10.1016/j.materresbull.2011.01.022

Cited by 41 publications

(25 citation statements)

References 17 publications

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“…It is to be noted that the outer surface contributes larger to the electrochemical performance of the material than the inner surfaces. As previously reported [6], the inner electrode surface of pristine Bi 2 WO 6 has higher contribution to the charge storage than the outer surfaces. The values of q* (Inner) and q* (Outer) for pristine Bi 2 WO 6 are 864 and 223 C g -1 .…”

Section: Cyclic Voltammetric (Cv) Analysissupporting

confidence: 77%

“…Subsequently, the peak at 307 cm -1 is associated with the translation modes involving simultaneous motions of Bi 3? and WO 6 6-. Moreover, the peak at 284 cm -1 is due to the mode of terminal WO 2 groups [37,38].…”

Section: Raman Analysismentioning

confidence: 99%

“…However, from the early results of Rietveld refinement for pristine Bi 2 WO 6 [6], there is a coexistence of Bi 2 WO 6 (96.64 wt%) and Bi 2 O 3 -based phase (3.36 wt%) within the material. Hence, it can be concluded that the addition of PVP has enhanced the phase purity of the material to a greater extent.…”

Section: X-ray Diffraction (Xrd) With Rietveld Analysismentioning

confidence: 99%

“…Especially NiO (674.2 F g -1 ), Co 3 O 4 (905 F g -1 ), MnO 2 (622 F g -1 ), NiWO 4 (173 F g -1 ), etc., [2][3][4][5] have been used as the positive electrodes. On the other hand, Bi 2 O 3 (386 F g -1 ), Fe 3 O 4 (163 F g -1 ), VN (413 F g -1 ), BiPO 4 (302 F g -1 ), etc., [6][7][8][9] have been used as the negative electrode materials: however, the obtained specific capacitance of negative electrodes is still insufficient to meet the practical applications. Recently, it has been reported that Bi 2 WO 6 nanoparticles could be used as an efficient negative electrode material for supercapacitors due to its distinctive properties and it delivered a specific capacitance of 304 F g -1 at 3 mA cm -2 in 1 M KOH electrolyte in the operating potential window of -0.9 to ?…”

Section: Introductionmentioning

confidence: 99%

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Effect of carbon coating on the electrochemical properties of Bi2WO6 nanoparticles by PVP-assisted sonochemical method

et al. 2015

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Polyvinylpyrrolidone (PVP)-assisted Bi 2 WO 6 nanoparticles were successfully synthesized by sonochemical method. Three different concentrations of PVP (0.05, 0.1, and 0.2 g) were used, and their effects over the structural, morphological, compositional, and electrochemical analysis were studied. The structural investigation revealed the formation of 100 % pure Bi 2 WO 6 phase. The presence of carbon in the PVP-assisted materials was evidenced from differential scanning calorimetry, Fourier transform infra red (FT-IR) spectroscopy and Raman analysis. There was a reduction in the particle size of Bi 2 WO 6 (30-35 nm) upon using PVP. The highly crystalline nature and the presence of carbon coating over Bi 2 WO 6 were evidenced from the high-resolution transmission electron microscopic image. Besides, the calculated d-spacing of 0.19 nm attributed to (2 0 6) lattice plane of Bi 2 WO 6 nanoparticles. Subsequently, a shift in binding energy toward larger values while using PVP was identified through X-ray photoelectron spectroscopic analysis. The electrochemical analysis showed a subsequent enhancement in specific capacitance of PVP-assisted Bi 2 WO 6 (462 F g -1 ) compared with pristine Bi 2 WO 6 (304 F g -1 ) at 3 mA cm -2 .

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Section: Cyclic Voltammetric (Cv) Analysissupporting

confidence: 77%

Section: Raman Analysismentioning

confidence: 99%

Section: X-ray Diffraction (Xrd) With Rietveld Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of carbon coating on the electrochemical properties of Bi2WO6 nanoparticles by PVP-assisted sonochemical method

et al. 2015

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“…Second, Bi 2 O 3 polymorphs are sensitive toward temperature-dependent phase transformations; e.g., the metastable high-temperature β-Bi 2 O modification tends to transform into low-temperature α-Bi 2 O 3 at a definite temperature [8] which would restrict the parameter window for photocatalytic applications. Doping has been proposed as an effective solution to these issues [9,10]. A notable study on this topic demonstrated that N dopants to Bi 2 O 3 induced redshift of the visible light absorption, resulting in a significantly improved photodegradation performance [11,12].…”

Section: Introductionmentioning

confidence: 99%

Electronic and optical properties of N-doped Bi2O3 polymorphs for visible light-induced photocatalysis

Wang

Cao

et al. 2015

J Mol Model

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The effect of N doping on the crystal structure, electronic, and optical properties of α-Bi2O3 and β-Bi2O3 has been studied in detail based with first principle calculations. The crystallographic features of Bi2O3 polymorphs are not substantially changed through N doping, whereas charge transfer from Bi to N results in large variations of charge density distribution. N-doped β-Bi2O3 exhibits improved thermal stability due to stronger Bi-N covalent bonds and lower defect formation energy, and the convenient preparative access agrees well with experimental observations. Calculated band structures and optical properties indicate that N doping does not induce major band gap narrowing, but leads to the presence of isolated bands above the VBM induced by N 2p for both α-Bi2O3 and β-Bi2O3 which induce large red-shifts of their visible light absoprtion properties. These isolated bands act as acceptor levels and facilitate electron transition under visible light illumination through introduction of steps between VB and CB, thereby rendering the materials quite promising for photocatalytic applications.

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Metal Oxides for Supercapacitors

Adli

Hosseini

et al. 2021

Handbook of Supercapacitor Materials

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Microwave synthesis and electrochemical characterization of mesoporous carbon@Bi2O3 composites

Cited by 41 publications

References 17 publications

Effect of carbon coating on the electrochemical properties of Bi2WO6 nanoparticles by PVP-assisted sonochemical method

Effect of carbon coating on the electrochemical properties of Bi2WO6 nanoparticles by PVP-assisted sonochemical method

Electronic and optical properties of N-doped Bi2O3 polymorphs for visible light-induced photocatalysis

Metal Oxides for Supercapacitors

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