Photocatalytic degradation of an azo dye using N-doped NaTaO3 synthesized by one-step hydrothermal process

Liu, Darui; Jiang, Yinshan; Gao, Guangzhen

doi:10.1016/j.chemosphere.2011.01.033

Cited by 83 publications

(31 citation statements)

References 25 publications

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“…2(a), the NaTaO 3 -E-G0 particles synthesized by mixed solution in the absence of glucose presented agglomeration, to some extent, with non-uniform sizes. [15][16][17][18][19][20][21][22] This might be because of the considerably decreased particle size with good distribution, resulting in homogeneous pore structure with a pore size of 7.8 nm and considerably improved pore volumes (0.362 cm 3 g À1 ). When the glucose was employed, it is apparent that the particles of sample NaTaO 3 -E-G2 were well dispersed with relatively uniform size of about 20 nm as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

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A carbon modified NaTaO₃ mesocrystal nanoparticle with excellent efficiency of visible light induced photocatalysis

Yin

Liu

et al. 2014

J. Mater. Chem. A

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A carbon modified NaTaO 3 mesocrystal nanoparticle (ca. 20 nm) was successfully synthesized by a one-pot solvothermal method, employing TaCl 5 and NaOH as the starting materials and distilled water/EG mixed solution as a reaction solvent in the presence of appropriate amounts of glucose. The mesocrystal sample presented a high specific surface area 90.8 m 2 g À1 with large amounts of well-dispersed mesopores in the particle, owing to the co-effect of EG and glucose during the reaction process. A nonclassic mechanism of formation was proposed for the growth of the NaTaO 3 mesocrystal. Furthermore, the NaTaO 3 mesocrystal exhibited considerably improved visible light absorption in addition to the intrinsic UV light absorption as a result of carbon modification originated from glucose. On the basis of the large specific surface area, high crystallinity and optical property, the carbon modified NaTaO 3 mesocrystal demonstrated excellent efficiency for continuous NO gas destruction under irradiation of UV, short wavelength visible lights (>400 m) and even long wavelength visible light (>510 nm), considerably superior to those of the unmodified NaTaO 3 specimen and commercial titania, P25. The carbon modified NaTaO 3 mesocrystal nanoparticles prepared in this work would probably have potential utilization in environmental purification and energy conversion.

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Section: Resultsmentioning

confidence: 99%

“…[14][15][16] However, there are two main factors, which limit the high efficiency of NaTaO 3 in photocatalysis. [14][15][16] However, there are two main factors, which limit the high efficiency of NaTaO 3 in photocatalysis.…”

Section: Introductionmentioning

confidence: 99%

A carbon modified NaTaO₃ mesocrystal nanoparticle with excellent efficiency of visible light induced photocatalysis

Yin

Liu

et al. 2014

J. Mater. Chem. A

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“…Among them, NaTaO 3 photocatalyst has the highest photocatalytic activity for hydrogen production [13]. NaTaO 3 -based photocatalyst, such as La 0.02 NaTaO 3 , SmNaTaO 3 , and N-NaTaO 3 , have been reported to act as efficient photocatalysts to split water into H 2 and O 2 under UV light irradiation [14].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Nanocrystalline of Lanthanum Doped NaTaO3 and Photocatalytic Activity for Hydrogen Production

Husin

Pontas

et al. 2014

j.eng.technol.sci.

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Abstract. Sodium tantalum oxide doping lanthanum (La-NaTaO 3 ) compounds were successfully synthesized by a sol-gel method and calcined at different temperatures. Tantalum chloride (TaCl 5 ) was used as starting material and lanthanum nitrate (La(NO 3 ) 3 .6H 2 O) as lanthanum source. X-ray diffraction (XRD) revealed that the calcination temperature strongly influenced the crystallinity of the prepared samples. The crystallite sizes of the resultant LaNaTaO 3 were in the range of 27-46 nm. The photocatalytic activities of the samples were examined for hydrogen production from an aqueous methanol solution under UV light irradiation. It was found that the photocatalytic activity of the La-NaTaO 3 depended strongly on the calcination temperature. The range of calcination temperatures were 500, 700, and 900°C. The La-NaTaO 3 sample calcined at 900°C showed the highest photocatalytic activity compared to the samples calcined at the other temperatures. The rate of hydrogen production reached a value of 6.16 mmol h -1 g -1 catalyst.

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“…The hydrogen evolution rate of La, Cr codoped NaTaO 3 was enhanced 5.6 times to 1467.5 μmol g -1 h -1 , and the induction period was shortened to 33%, compared to the identical values achieved by the Cr-doped NaTaO 3 photocatalyst prepared from aqueous precursor solution [34]. Besides metal ion doping, several non-metal ions are also incorporated into the host matrix of alkali tantalates for improved visible light absorption and photocatalytic performance [35,36]. A plane-wave-based density functional theory calculation is conducted to predict the doping effects on the variations of the band structure of non-metal ions doped NaTaO 3 .…”

Section: Doping Strategiesmentioning

confidence: 97%

Tantalate-based Perovskite for Solar Energy Applications

Su¹,

Lang²,

Du³

et al. 2016

Perovskite Materials - Synthesis, Characterisation, Properties, and Applications

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To realize a sustainable society in the near future, the development of clean, renewable, cheap and sustainable resources and the remediation of environmental pollutions using solar energy as the driving force would be important. During the past few decades, plenty of efforts have been focused on this area to develop solar light active materials to meet the increased energy and environmental crisis. Owning to the unique perovskite-type structure, tantalate-based semiconductors with unable chemical composition show high activities toward the conversion of solar radiation into chemical energy. Moreover, various engineering strategies, including crystal structure engineering, electronic structure engineering, surface/interface engineering, co-catalyst engineering and so on, have been developed in order to modulate the charge separation and transfer efficiency, optical absorption, band gap position and photochemical and photophysical stability, which would open a realm of new possibilities for exploring novel materials for solar energy applications.Keywords: Tantalate, photocatalysis, solar energy, perovskite . IntroductionIn view of global energy crisis and environmental pollution, the search for renewable and clean energy resources and the development of eco-friendly systems for environmental remediation have received great attention. Solar energy is the prime renewable source of energy for every life on the earth. The amount of solar energy that strikes the Earth yearly in the form of sunlight is approximately ten thousand times the total energy that is consumed on this planet [ ]. However, sunlight is diffuse and intermittent, which impedes its collecting and storage that play critical roles in the full exploitation of its potentials. As one of the most promising solutions for storing and converting solar energy, semiconductor photocatalysis has attracted much © 2016 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. attention, since it provides an environmental benign strategy for splitting water into hydrogen and oxygen, reducing carbon dioxide into useful chemicals and fossil fuels, and completely eliminating all kinds of contaminants under the sunlight illumination under ambient conditions [ -]. Generally, the fundamental principles of semiconductor photocatalysis have been extensively reported in previous works [ ]. A photocatalytic reaction is initiated on the basis of the formation of photogenerated charges such as electrons and holes after capture of sunlight by a semiconductor. Consequently, electrons can transit from valence band VB to conduction band CB leaving behind holes in the VB. If the photogenerated electron-hole pairs' separation is maintained, the photogenerated carriers can move to the semiconductor surfaces to react with the adsorbed small molecule...

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Photocatalytic degradation of an azo dye using N-doped NaTaO3 synthesized by one-step hydrothermal process

Cited by 83 publications

References 25 publications

A carbon modified NaTaO₃ mesocrystal nanoparticle with excellent efficiency of visible light induced photocatalysis

A carbon modified NaTaO₃ mesocrystal nanoparticle with excellent efficiency of visible light induced photocatalysis

Synthesis of Nanocrystalline of Lanthanum Doped NaTaO3 and Photocatalytic Activity for Hydrogen Production

Tantalate-based Perovskite for Solar Energy Applications

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Photocatalytic degradation of an azo dye using N-doped NaTaO3 synthesized by one-step hydrothermal process

Cited by 83 publications

References 25 publications

A carbon modified NaTaO3 mesocrystal nanoparticle with excellent efficiency of visible light induced photocatalysis

A carbon modified NaTaO3 mesocrystal nanoparticle with excellent efficiency of visible light induced photocatalysis

Synthesis of Nanocrystalline of Lanthanum Doped NaTaO3 and Photocatalytic Activity for Hydrogen Production

Tantalate-based Perovskite for Solar Energy Applications

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A carbon modified NaTaO₃ mesocrystal nanoparticle with excellent efficiency of visible light induced photocatalysis

A carbon modified NaTaO₃ mesocrystal nanoparticle with excellent efficiency of visible light induced photocatalysis