Hydrothermal synthesis and photocatalytic properties of tantalum pentoxide nanorods

Li, Juxia; Dai, Weili; Yan, Junqing; Wu, Guangjun; Li, Landong; Guan, Naijia

doi:10.1016/s1872-2067(14)60215-1

Cited by 18 publications

(42 citation statements)

References 54 publications

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“…Actually, only few works could be found in the literature discussing the use of pure (or doped) Ta 2 O 5 as photocatalyst for photodegradation of RhB dye. ,,− Table S4 presents a summary of these works. As it can be seen, several authors do not mention the radiometric or photometric characteristic (W m –2 , lm m –2 , etc.)…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Visible-Light-Driven Photocatalytic Activity of Ta⁴⁺ Self-Doped Gray Ta₂O₅ Nanoparticles

et al. 2018

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C-impregnated/Ta4+ self-doped ultrafine Ta2O5 nanoparticles (NPs) were prepared by a one-step solvothermal method through reaction of Ta(V) chloride with benzyl alcohol. These NPs showed a large specific surface area of 253.4 m2 g–1, mean diameter of 2–3 nm, and superior photocatalytic activity in the photodegradation of Rhodamine B dye (RhB), compared to TiO2 (P25) and Ta2O5 commercial NPs. The obtained materials were annealed at different temperatures and their structure, morphology and optical and photocatalytic properties were investigated in detail. The C-impregnated Ta4+ self-doped Ta2O5 NPs presented enhanced and extended absorption in the visible range of the solar spectrum, increasing significantly their photocatalytic activity. The best photocatalyst could completely remove RhB after only 12 min of UV irradiation and yielded 68% and 43% of RhB photodegradation after 120 min of simulated sunlight and visible irradiation, respectively, with an apparent quantum efficiency of 3.6% at 447 nm. This enhanced photocatalytic performance is ascribed to the combined effects of better light harvesting properties, high surface area and longer electron lifetimes in the excited sub-band, due to the presence both of oxygen vacancies neighboring Ta4+ and Ta–O–C on the Ta2O5 surface. The photocatalyst systems presented good stability, confirming their promise as candidates for photocatalytic applications.

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Section: Resultsmentioning

confidence: 99%

Synthesis and Visible-Light-Driven Photocatalytic Activity of Ta⁴⁺ Self-Doped Gray Ta₂O₅ Nanoparticles

et al. 2018

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“…Tantalum oxide (Ta 2 O 5 ) is a wide bandgap semiconductor with high refractive indexes, low absorption, and large dielectric constants that has a variety of important applications, including catalysts, gas sensors, coating, photographic glasses, , as well as storage capacitors. − Ta 2 O 5 nanomaterials, which have a larger surface area than their bulk counterparts, are good catalysts and catalytic supports. − Particularly, Ta 2 O 5 nanorods have potential for providing solutions to the current energy- and environment-related problems because these materials show excellent catalytic properties, including photocatalytic hydrogen production, photodegradation of rhodamine B, and methylene blue …”

Section: Introductionmentioning

confidence: 99%

“…5−8 Ta 2 O 5 nanomaterials, which have a larger surface area than their bulk counterparts, are good catalysts and catalytic supports. 9−15 Particularly, Ta 2 O 5 nanorods have potential for providing solutions to the current energy-and environment-related problems because these materials show excellent catalytic properties, including photocatalytic hydrogen production, 16 photodegradation of rhodamine B, 17 and methylene blue. 18 In order to develop structure−property relations and improve the catalytic performances, detailed surface structure information of oxide nanomaterials is required; however, much is still not well-understood.…”

Section: ■ Introductionmentioning

confidence: 99%

¹⁷O Solid-State NMR Studies of Ta₂O₅ Nanorods

Chen

Wen

et al. 2020

ACS Omega

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17O solid-state NMR spectroscopy was used to study the structure of Ta2O5 nanorods for the first time. Although the observations of oxygen ions in the “bulk” part of the Ta2O5 nanorods can be achieved with conventional high-temperature enrichment with 17O2, low-temperature isotopic labeling with H2 17O generated samples whose surfaces are selectively enriched, leading to surface-only detection of oxygen species. By applying 17O–1H double-resonance NMR techniques and 1H NMR spectroscopy, surface hydroxyl species and adsorbed water can also be studied. The results form the basis for further understanding of the structure–property relationship of Ta2O5 nanomaterials.

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“…Up to date, many methods such as anodization methods [8][9][10], sol-gel technique [11], hydrothermal oxidation [12], magnetron sputtering method [13], pulsed laser deposition [14], electrospinning [15], solvothermal [16] and microemulsion [17] have been used for the fabrication of Ta 2 O 5 NPs with various morphologies including mesoporous, spheres, nanowires, nanotubes, nanorods, nanoparticles [8][9][10][11][12][13][14][15][16][17]. However, most of them have some significant drawbacks, for example, complex reaction and treatment process, poor crystallinity, or very narrow spectrum response range [17].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Ta₂O₅ nanoparticles by using cathode glow discharge electrolysis

et al. 2021

Mater. Res. Express

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Tantalum pentoxide nanoparticles (Ta2O5 NPs) were fabricated by cathode glow discharge electrolysis (CGDE) generated between a needle-like platinum wire cathode and a tantalum foil anode in 6 g L−1 Na2SO4 electrolyte solution containing 5 mL hydrofluoric acid (HF) and 0.075 g cetyltrimethyl ammonium bromide (CTAB). The chemical structure, composition and morphology of the obtained powder were analyzed by using XRD, FT-IR, SEM/EDS, XPS and UV-vis DRS. The results found that Ta2O5 NPs with orthorhombic structure and wide band gap (3.6 eV) are successfully fabricated at 500 V discharge voltage in about 3 h. CTAB as a stabilizing agent can reduce the agglomeration due to forming CTA+ and attaching the surface of the synthetic products. A possible preparation mechanism of Ta2O5 NPs is proposed. Firstly, the tantalum foil anode is oxidized to form a compact Ta2O5 layer. Then, Ta2O5 surface is etched to form soluble [TaF7]2− complexes in the presence of HF. After that, soluble [TaF7]2− complexes can react with H2O to form Ta(OH)5. Finally, Ta(OH)5 is further converted to Ta2O5 from plasma-liquid interface into solution.

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Hydrothermal synthesis and photocatalytic properties of tantalum pentoxide nanorods

Cited by 18 publications

References 54 publications

Synthesis and Visible-Light-Driven Photocatalytic Activity of Ta⁴⁺ Self-Doped Gray Ta₂O₅ Nanoparticles

Synthesis and Visible-Light-Driven Photocatalytic Activity of Ta⁴⁺ Self-Doped Gray Ta₂O₅ Nanoparticles

¹⁷O Solid-State NMR Studies of Ta₂O₅ Nanorods

Preparation of Ta₂O₅ nanoparticles by using cathode glow discharge electrolysis

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Hydrothermal synthesis and photocatalytic properties of tantalum pentoxide nanorods

Cited by 18 publications

References 54 publications

Synthesis and Visible-Light-Driven Photocatalytic Activity of Ta4+ Self-Doped Gray Ta2O5 Nanoparticles

Synthesis and Visible-Light-Driven Photocatalytic Activity of Ta4+ Self-Doped Gray Ta2O5 Nanoparticles

17O Solid-State NMR Studies of Ta2O5 Nanorods

Preparation of Ta2O5 nanoparticles by using cathode glow discharge electrolysis

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Product

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Synthesis and Visible-Light-Driven Photocatalytic Activity of Ta⁴⁺ Self-Doped Gray Ta₂O₅ Nanoparticles

Synthesis and Visible-Light-Driven Photocatalytic Activity of Ta⁴⁺ Self-Doped Gray Ta₂O₅ Nanoparticles

¹⁷O Solid-State NMR Studies of Ta₂O₅ Nanorods

Preparation of Ta₂O₅ nanoparticles by using cathode glow discharge electrolysis