MoO3 nanostructures from EGCG assisted sonochemical route: Evaluation of its application towards forensic and photocatalysis

Yogananda, H.S.; Nagabhushana, H.; Darshan, G.P.; Basavaraj, R.B.; Prasad, B. Daruka; Sateesh, M.K.; Raghu, G.K.

doi:10.1016/j.jallcom.2017.11.278

Cited by 29 publications

(6 citation statements)

References 59 publications

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“…The sample S2 possesses a lower charge transfer resistance and higher Warburg resistance than S1 and S3. The Warburg resistance is related to the charge transfer resistance, and denotes the resistance to mass transfer and is controlled by the specific conductance [58]. The electrochemical results are in agreement with the results obtained in photodegradation experiments because sample S2 showed the best photodegradation efficiency with respect to S1 and S3 catalysts since the better charge transfer in sample S2 caused diminishing of the electron and hole recombination [59].…”

Section: Eis and CV Studysupporting

confidence: 84%

“…Sample S1 has a rod-like morphology providing a quicker and smoother path to electrolyte ions for insertion or extraction from the surface of the electrode. Sample S3 has a 3D structure and the smallest crystallite size, which helps to build a pathway for electric charge carriers, utilise more active sites and provide a faster path for electrolyte ions, leading to an excellent supercapacitor performance [56,58]. Also, sample S1 possesses a higher specific capacitance than S2 and S3 since S1 has a high ion diffusion coefficient (shown in…”

Section: Eis and CV Studymentioning

confidence: 99%

“…The ein the CB diffused to the adsorbed O 2 to form activated O 2•−. These radicals react with the H 2 O molecules adsorbed on the surface to form H 2 O 2 that get converted to OH • radicals[58]. The OH • radicals are powerful oxidising agents.…”

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confidence: 99%

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Ethylenediamine-assisted growth of multi-dimensional ZnS nanostructures and study of its charge transfer mechanism on supercapacitor electrode and photocatalytic performance

et al. 2020

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In recent years, much interest has been raised by materials with multi-purpose characteristics as the performance of electrochemical energy devices such as supercapacitors and photocatalytic activities depend strongly on the properties of materials. This study delineates various parameters like morphology, energy band gap, charge transfer resistance, different defect states, diffusion coefficient and functional groups adsorbed on the surface of material to assess the performance of supercapacitor electrodes and photocatalytic degradation efficiency of synthesised multi-dimensional ZnS nanostructures. Ethylenediamine (EN)-mediated multi-dimensional ZnS nanostructures were grown by the solvothermal route. One-dimensional (1D), 2D and 3D morphologies were obtained by varying the ratio of de-ionised water and EN, taken as 1:3, 1:2 and 1:1, respectively. The EN molecules effectively capped most of the surfaces of the ZnS nanoparticles formed, preventing agglomeration of nanoparticles due to the decrement in surface energy. The oriented attachment of these clusters resulted in the formation of 1D, 2D and 3D morphologies. The plausible chemistry in the formation of 1D, 2D and 3D nanostructures has been elaborated. Charge transfer properties of prepared electrodes have been examined using the electrochemical impedance spectroscopy (EIS) technique because better charge transfer causes diminishing electron/hole recombination and hence better photodegradation efficiency. Among the synthesised materials, the 2D nanostructure degraded the eosin Y dye to maximum 90.71% efficiency with rate constant 34 × 10−3 min−1. 2D nanostructures possess better charge transfer and hence better photodegradation efficiency. Various studies using methods of UV-vis, Fourier-transform infrared, Brunauer–Emmett–Teller, x-ray photoelectron spectroscopy and photoluminescence spectra are in good agreement with the obtained photodegradation results. After analysing cyclic voltammetry curves and EIS, a higher diffusion coefficient is obtained for 1D nanostructure material, hence a higher specific capacitance and higher energy density of 159.12 F g−1 and 22.75 KWh kg−1 are found in this case. Only 9% loss of specific capacitance is found after 1000 cycles, showing a relatively high cycling stability in 3D nanostructures. The excellent supercapacitive property can be attributed to the porous structure and high specific surface area. Thus, the synthesised multi-dimensional ZnS nanostructures are proved to be a potential candidate for both photocatalytic and supercapacitor electrode performance.

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Section: Eis and CV Studysupporting

confidence: 84%

Section: Eis and CV Studymentioning

confidence: 99%

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Ethylenediamine-assisted growth of multi-dimensional ZnS nanostructures and study of its charge transfer mechanism on supercapacitor electrode and photocatalytic performance

et al. 2020

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“…Actually, La-based complex oxides such as LMO, LCMO, and LMWO are difficult to deactivate. For that reason, they retain their activity longer than MoO 3 , releasing Mo-polyacids slowly with higher amounts of minimal inhibitory concentration (MIC) value (0.17–1.7 μmol/l for E. coli [ 60 ]).…”

Section: Resultsmentioning

confidence: 99%

Effects of cerium and tungsten substitution on antiviral and antibacterial properties of lanthanum molybdate

Matsumoto

Sunada²,

Nagai³

et al. 2020

Materials Science and Engineering: C

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Powders of cerium (Ce)-substituted and tungsten (W)-substituted La 2 Mo 2 O 9 (LMO) were prepared using polymerizable complex method. Their antiviral and antibacterial performances were then evaluated using bacteriophage Qβ, bacteriophage Φ6, Escherichia coli , and Staphylococcus aureus . The obtained powders, which were almost single-phase, exhibited both antiviral and antibacterial properties. Effects of dissolved ions on their antiviral activity against bacteriophage Qβ were remarkable. A certain contribution of direct contact to the powder surface was also inferred along with the dissolved ion effect for antiviral activity against bacteriophage Φ6. Dissolved ion effects and pH values suggest that both Mo and W are in the form of polyacids. Antiviral activity against bacteriophage Φ6 was improved by substituting Ce for La in LMO. Similarly to LMO, Ce-substituted LMO exhibited hydrophobicity. Inactivation of alkaline phosphatase enzyme proteins was inferred as one mechanism of the antiviral and antibacterial activities of the obtained powders.

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“…MoO 3 is also used as a catalyst in the industrial production of acrylonitrile from propylene and ammonia. However, the constant interest in nanomaterials has made also nano MoO 3 attractive, which has been proven to be a promising candidate in many fields, e.g., (photo)catalysis, gas sensing, electrochemical cells, or even in forensic science and photothermal therapy [1][2][3][4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis and Gas Sensing of Monoclinic MoO3 Nanosheets

et al. 2020

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Effects of different reaction parameters in the hydrothermal synthesis of molybdenum oxides (MoO3) were investigated and monoclinic (β-) MoO3 was prepared hydrothermally for the first time. Various temperatures (90/210 °C, and as a novelty 240 °C) and durations (3/6 h) were used. At 240 °C, cetyltrimethylammonium bromide (CTAB) and CrCl3 additives were also tested. Both the reaction temperatures and durations played a significant role in the formation of the products. At 90 °C, h-MoO3 was obtained, while at 240 °C the orthorhombic (α-) MoO3 formed with hexagonal rod-like and nanofibrous morphology, respectively. The phase transformation between these two phases was observed at 210 °C. At this temperature, the 3 h reaction time resulted in the mixture of h- and α-MoO3, but 6 h led to pure α-MoO3. With CTAB the product was bare o-MoO3, however, when CrCl3 was applied, pure metastable m-MoO3 formed with the well-crystallized nanosheet morphology. The gas sensing of the MoO3 polymorphs was tested to H2, which was the first such gas sensing study in the case of m-WO3. Monoclinic MoO3 was found to be more sensitive in H2 sensing than o-MoO3. This initial gas sensing study indicates that m-MoO3 has promising gas sensing properties and this MoO3 polymorph is promising to be studied in detail in the future.

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MoO3 nanostructures from EGCG assisted sonochemical route: Evaluation of its application towards forensic and photocatalysis

Cited by 29 publications

References 59 publications

Ethylenediamine-assisted growth of multi-dimensional ZnS nanostructures and study of its charge transfer mechanism on supercapacitor electrode and photocatalytic performance

Ethylenediamine-assisted growth of multi-dimensional ZnS nanostructures and study of its charge transfer mechanism on supercapacitor electrode and photocatalytic performance

Effects of cerium and tungsten substitution on antiviral and antibacterial properties of lanthanum molybdate

Hydrothermal Synthesis and Gas Sensing of Monoclinic MoO3 Nanosheets

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