Synthesis and characterization of mesoporous Ta2O5–TiO2 photocatalysts for water splitting

Stodolny, Mikołaj; Laniecki, M.

doi:10.1016/j.cattod.2008.07.034

Cited by 51 publications

(31 citation statements)

References 13 publications

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“…This value is in line with reported band gape nergies for crystalline Ta 2 O 5 . [20] Similarly,t he band gap energies of AC-NaTaO 3 andS S-NaTaO 3 match reported values, demonstrating band gap energies of 4.1 and 4.0 eV,r espectively. [14,21] The results of the band gap determination show that AC-Ta 2 O 5 and AC-NaTaO 3 can be excited by UV light with similar energy to the excitation of their corresponding reference materials.T he determined band gap energies of all samples are summarized in Table 1.…”

Section: Resultssupporting

confidence: 75%

“…The obtained data was converted into Tauc plots (Figure ), from which the band gap energies for AC‐Ta 2 O 5 and commercial Ta 2 O 5 were estimated to be 4.0 eV for both samples. This value is in line with reported band gap energies for crystalline Ta 2 O 5 . Similarly, the band gap energies of AC‐NaTaO 3 and SS‐NaTaO 3 match reported values, demonstrating band gap energies of 4.1 and 4.0 eV, respectively .…”

Section: Resultsmentioning

confidence: 99%

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Activated‐Carbon‐Templated Crystalline Tantalates for Photocatalytic Water Splitting

Grewe

Tüysüz

2016

ChemNanoMat

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Herein, we report a facile nanocasting route for the preparation of crystalline mesoporous Ta₂O₅ and NaTaO₃ with a high surface area using activated carbon as the structure-directing hard template. The crystalline particles of Ta₂O₅ and NaTaO₃ have mean sizes of 6 and 9 nm, constructing mesoporous networks with surface areas of 91 and 75 m² g⁻¹, respectively. The photocatalytic performances of the tantalum-based replicas were investigated for the water splitting reaction by using methanol as sacrificial agent and better photocatalytic performances were observed in comparison with bulk and amorphous counterparts. Loading the templated Ta₂O₅ and NaTaO₃ with 1 wt % NiO_x boosted their photocatalytic activity. The most-active sample, NaTaO₃/NiO_x, was also tested for overall water splitting and it produced hydrogen and oxygen in stoichiometric ratios at rates of 129 and 66 μmol h⁻¹, respectively

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Section: Resultssupporting

confidence: 75%

Section: Resultsmentioning

confidence: 99%

Activated‐Carbon‐Templated Crystalline Tantalates for Photocatalytic Water Splitting

Grewe

Tüysüz

2016

ChemNanoMat

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“…These catalysts include simple metal oxides [22][23][24][25][26] such as TiO 2 , ZrO 2 , ZnO, CuO, Cu 2 O, CeO 2 , WO 3 , or Ta 2 O 5 , titanates [27][28][29] such as SrTiO 3 , La 2 Ti 2 O 7 , La 2 TiO 5 , Sr 3 Ti 2 O 7 , BaTi 4 O 9 , PbTiO 3 , or M 2 Ti 6 O 12 (M = Na, K, Rb), niobates [27,[30][31][32][33][34][35] In, etc. These catalysts include simple metal oxides [22][23][24][25][26] such as TiO 2 , ZrO 2 , ZnO, CuO, Cu 2 O, CeO 2 , WO 3 , or Ta 2 O 5 , titanates [27][28][29] such as SrTiO 3 , La 2 Ti 2 O 7 , La 2 TiO 5 , Sr 3 Ti 2 O 7 , BaTi 4 O 9 , PbTiO 3 , or M 2 Ti 6 O 12 (M = Na, K, Rb), niobates [27,[30][31][32][33][34][35] In, etc.…”

Section: Artificial Leavesmentioning

confidence: 99%

An Insight into Artificial Leaves for Sustainable Energy Inspired by Natural Photosynthesis

2010

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The development of green sustainable energy to control our carbon‐based energy “addiction” and to reduce atmospheric CO2 emissions is one of the most urgent issues regarding the continued existence of man on planet earth. Among renewable energy resources, solar energy is by far the largest exploitable resource. Photosynthesis provides a blueprint for solar energy conversion and storage in fuels. Natural green leaves capture and convert solar energy into chemical fuel through photosynthesis. The two reactions are the splitting of water into hydrogen and oxygen (water splitting) and the reduction of CO2 into carbohydrates (CO2 reduction). Inspired by natural leaves, constructing artificial leaves by mimicking photosynthesis to capture solar energy, split water into hydrogen and oxygen, and convert atmospheric carbon dioxide, thus producing various forms of environmentally clean fuels, is of high significance. Many major advances in this research area are highlighted in this Minireview. Some typical successful prototypes from natural systems that can be used for the biomimetic design of artificial leaves are particularly emphasized.

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“…Enhancements in photocatalytic activity over coupled semiconductors including CdS/TiO 2 [2], ZnS/TiO 2 [3], Cu 2 O/TiO 2 [4], and CuO/TiO 2 [5,6], WO 3 /SiCeTiO 2 [7], SrTiO 3 /TiO 2 [8], SnO 2 /TiO 2 [9], Ta 2 O 5 /TiO 2 [10], CuO/Al 2 O 3 /TiO 2 [11] have been investigated extensively.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Oxidation of Carbon Monoxide over Nanocomposites under UV Irradiation

Mohamed

Aazam

2012

Journal of Nanotechnology

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The NiO/SnO 2 nanocomposites have been prepared by the simple coprecipitation method and further characterized by the XRD, SEM, TEM, UV-Vis, and BET. X-ray diffraction (XRD) data analyses indicate the exclusive formation of nanosized particles with rutile-type phase (tetragonal SnO 2 ) for Ni contents below 10 mol%. Only above 10 mol% Ni, the formation of a second NiOrelated phase has been determined. The particle size is in the range from 12 to 6 nm. It decreases with increasing amounts of doping NiO. The morphology of NiO-doped SnO 2 nanocrystalline powders is spherical, and the distribution of particle size is uniform, as seen from transmission electron microscopy (TEM). The photocatalytic oxidation of CO over NiO/SnO 2 photocatalyst has been investigated under UV irradiation. Effects of NiO loading on SnO 2 , photocatalyst loading, and reaction time on photocatalytic oxidation of CO have been systematically studied. Compared with pure SnO 2 , the 33.3 mol% NiO/SnO 2 composite exhibited approximately twentyfold enhancement of photocatalytic oxidation of CO. Our results provide a method for pollutants removal. Due to simple preparation, high photocatalytic oxidation of CO, and low cost, the NiO/SnO 2 photocatalyst will find wide application in the coming future of photocatalytic oxidation of CO.

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Synthesis and characterization of mesoporous Ta2O5–TiO2 photocatalysts for water splitting

Cited by 51 publications

References 13 publications

Activated‐Carbon‐Templated Crystalline Tantalates for Photocatalytic Water Splitting

Activated‐Carbon‐Templated Crystalline Tantalates for Photocatalytic Water Splitting

An Insight into Artificial Leaves for Sustainable Energy Inspired by Natural Photosynthesis

Photocatalytic Oxidation of Carbon Monoxide over Nanocomposites under UV Irradiation

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