Mesoporous Ta2O5 nanoparticles as an anode material for lithium ion battery and an efficient photocatalyst for hydrogen evolution

Manukumar, K. N.; Kishore, Brij; Manjunath, K.; Nagaraju, G.

doi:10.1016/j.ijhydene.2018.08.075

Cited by 46 publications

(18 citation statements)

References 80 publications

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“…The transition metal oxide semiconductor catalyst such as ZnO and TiO 2 reported for best photocatalytic activity. Along with ZnO and TiO 2 some other oxide catalyst such as SnO 2 4 , Ta 2 O 5 5 , Nb 2 O 5 6 , Co 3 O 4 7 , WO 3 8 , V 2 O 5 9 , MoO 3 10 , Bi 2 MoO 4 11 , and CdMoO 4 also reported 12 . But these materials have wide band gap (>3.0 eV) and show good activity only under UV light which is only 5% of the solar spectrum and did not show good photocatalytic activity in the visible light 13 .…”

Section: Introductionmentioning

confidence: 99%

Unique CdS@MoS2 Core Shell Heterostructure for Efficient Hydrogen Generation Under Natural Sunlight

Kadam

Gosavi

Kale

et al. 2019

Sci Rep

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The hierarchical nanostructured CdS@MoS 2 core shell was architectured using template free facile solvothermal technique. More significantly, the typical hexagonal phase of core CdS and shell MoS 2 has been obtained. Optical study clearly shows the two steps absorption in the visible region having band gap of 2.4 eV for CdS and 1.77 eV for MoS 2 . The FESEM of CdS@MoS 2 reveals the formation of CdS microsphere (as a core) assemled with 40–50 nm nanoparticles and covered with ultrathin nanosheets of MoS 2 (Shell) having size 200–300 nm and the 10–20 nm in thickness. The overall size of the core shell structure is around 8 µm. Intially, there is a formation of CdS microsphre due to high affinity of Cd ions with sulfur and further growth of MoS 2 thin sheets on the surface. Considering band gap ideally in visible region, photocatalytic hydrogen evolution using CdS@MoS 2 core shell was investigated under natural sunlight. The utmost hydrogen evolution rate achieved for core shell is 416.4 µmole h −1 with apparent quantum yield 35.04%. The photocatalytic activity suggest that an intimate interface contact, extended visible light absorption and effective photo generated charge carrier separation contributed to the photocatalytic enhancement of the CdS@MoS 2 core shell. Additional, the enhanced hole trapping process and effective electrons transfer from CdS to MoS 2 in CdS@MoS 2 core shell heterostructures can significantly contribute for photocatalytic activity. Such core shell heterostructure will also have potential in thin film solar cell and other microelectronic devices.

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Section: Introductionmentioning

confidence: 99%

Unique CdS@MoS2 Core Shell Heterostructure for Efficient Hydrogen Generation Under Natural Sunlight

Kadam

Gosavi

Kale

et al. 2019

Sci Rep

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“…Figure B shows the Raman spectra. Bands at low frequencies around 250 cm −1 were assigned to O‐Ta‐O bending vibration in [TaO 6 ] octahedra and at 650 cm −1 attributed to the stretching of Ta‐O‐Ta linkages . Bands at 1020 and 1163 cm −1 are assigned to the stretching mode of terminal P‐O bonds in pyrophosphate Q 1 units and O‐P‐O bonds in metaphosphate Q 2 units respectively.…”

Section: Resultsmentioning

confidence: 99%

Transparent glass and glass‐ceramic in the binary system NaPO₃‐Ta₂O₅

et al. 2019

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Transparent and homogeneous tantalum phosphate glasses were prepared in the binary system (100‐x)NaPO3‐xTa2O5 with x varying from 10 to 50 mol%. Thermal, structural, and optical properties, as well as crystallization mechanisms, were investigated by thermal analysis, X‐ray diffraction, Fourier‐transform infrared spectroscopy (FTIR) and Raman spectroscopies, optical absorption, transmission electron microscopy in terms of Ta2O5 content. FTIR and Raman results support the tantalum insertion in the phosphate chains with [TaO6] polyhedra cross‐linking the phosphate units. At higher Ta2O5 content, [TaO6] clusters are formed and connected to the phosphate network by P‐O‐Ta bonds. This structural evolution is in good agreement with the thermal features measured by differential scanning calorimetry (DSC) with a strong increase of the Tg temperatures up to 920°C, high thermal stability against crystallization for low Ta2O5 content and increasing of crystallization tendency for the most Ta‐concentrated samples. Besides, due to the progressive insertion of [TaO6] units, the precipitation of Na2Ta8O21 perovskite‐like phase was identified in the sample with 50 mol% of Ta2O5. The optimal heat treatment conditions were identified using DSC measurements and a transparent glass‐ceramic from 50NaPO3 to 50Ta2O5 composition was prepared. The obtaines glass‐ceramic has great potential for optical applications, such as host for rare‐earth ions, nonlinear optical materials, and ferroelectric domain.

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“…They are used aer calcination at 773 K for 3 h. A Ta 2 O 5 support with high surface area was prepared using a solvothermal method based on the reported procedure. 18 Aer 2.5 g of TaCl 2 was dissolved into ethanol (250 mL) and was stirred for 2 h, it was heated at 463 K for 72 h. Then, aer cooling to room temperature, the white precipitate was ltrated and washed with distilled water. It was then dried at 333 K for 12 h, and was calcined at 973 K for 3 h. On these supports, Pd (3 wt%) was loaded using an impregnation method with Pd(OCOCH 3 ) 2 as a precursor.…”

Section: Catalyst Preparationmentioning

confidence: 99%

“…For this purpose, it is important to optimize the catalyst support, which plays an important role for surface proton conduction. Some reports have described the effect of support in an electric eld, 6,9,18 but no report to date explains a study of catalytic activity with surface proton conductivity, or claries catalytic activity or factors of support affecting surface proton conductivity. Thus, the reason of high activity for some catalysts were still unclear.…”

Section: Introductionmentioning

confidence: 99%

Support effects on catalysis of low temperature methane steam reforming

et al. 2020

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Mesoporous Ta2O5 nanoparticles as an anode material for lithium ion battery and an efficient photocatalyst for hydrogen evolution

Cited by 46 publications

References 80 publications

Unique CdS@MoS2 Core Shell Heterostructure for Efficient Hydrogen Generation Under Natural Sunlight

Unique CdS@MoS2 Core Shell Heterostructure for Efficient Hydrogen Generation Under Natural Sunlight

Transparent glass and glass‐ceramic in the binary system NaPO₃‐Ta₂O₅

Support effects on catalysis of low temperature methane steam reforming

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Mesoporous Ta2O5 nanoparticles as an anode material for lithium ion battery and an efficient photocatalyst for hydrogen evolution

Cited by 46 publications

References 80 publications

Unique CdS@MoS2 Core Shell Heterostructure for Efficient Hydrogen Generation Under Natural Sunlight

Unique CdS@MoS2 Core Shell Heterostructure for Efficient Hydrogen Generation Under Natural Sunlight

Transparent glass and glass‐ceramic in the binary system NaPO3‐Ta2O5

Support effects on catalysis of low temperature methane steam reforming

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Product

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Transparent glass and glass‐ceramic in the binary system NaPO₃‐Ta₂O₅