H2 evolution under visible light irradiation on La and Cr co-doped NaTaO3 prepared by spray pyrolysis from polymeric precursor

Kang, Hyun Woo; Lim, Sung Nam; Park, Seung Bin; Park, Ah‐Hyung Alissa

doi:10.1016/j.ijhydene.2013.03.048

Cited by 44 publications

(22 citation statements)

References 40 publications

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“…To synthesize high-surface-area NaTaO 3 nanoparticles for different applications, several methods like sol–gel, hydrothermal, reverse micelles have been employed. 15,30,31…”

Section: Introductionmentioning

confidence: 99%

High-Surface-Area Sodium Tantalate Nanoparticles with Enhanced Photocatalytic and Electrical Properties Prepared through Polymeric Citrate Precursor Route

et al. 2019

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NaTaO3 nanoparticles with a high surface area of 46.2 m2/g have been successfully synthesized using a polymeric citrate precursor route. As-prepared nanoparticles were extensively characterized by X-ray diffraction, Fourier transform infrared, transmission emission microscopy, and scanning electron microscopy studies for the analysis of phase purity, crystallinity, and morphology. NaTaO3 nanoparticles show efficient photo-induced removal of the methylene blue dye under sunlight, which were confirmed by using liquid chromatography–mass spectroscopy. 86% dye has been degraded in 200 min at neutral pH, whereas the same amount of dye was decolorized in only 80 min at alkaline pH. Also, the dielectric behavior of the as-prepared nanoparticles at different annealing temperatures was explained by the Maxwell–Wagner polarization mechanism. At 500, 600, and 700 °C annealing temperatures, the dielectric constant and dielectric loss at 500 kHz for the samples were found to be 21.5, 18, and 16 and 0.012, 0.022, and 0.029, respectively. The unsaturated hysteresis loop shows weak ferroelectric behavior of NaTaO3 nanoparticles with remanent and saturation polarizations of 0.0013 and 0.21 μC/cm2, respectively, and S-E hysteresis shows a bipolar strain of 0.10%.

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“…To synthesize high-surface-area NaTaO 3 nanoparticles for different applications, several methods like sol–gel, hydrothermal, reverse micelles have been employed. 15,30,31…”

Section: Introductionmentioning

confidence: 99%

High-Surface-Area Sodium Tantalate Nanoparticles with Enhanced Photocatalytic and Electrical Properties Prepared through Polymeric Citrate Precursor Route

et al. 2019

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“…Nevertheless, doping Cr effectively red-shifts the absorption edge of both Sr 2 TiO 4 and Sr 2 TiO 3 F 2 into visible light region. This phenomenon has been seen in a wealth of Cr doped metal oxides [62][63][64][65] and is attributed to the formation of spinpolarized Cr 3 d valence band in the middle of band gap (Fig. S2).…”

Section: Spectroscopymentioning

confidence: 68%

Fluorination over Cr doped layered perovskite Sr2TiO4 for efficient photocatalytic hydrogen production under visible light illumination

2020

Journal of Energy Chemistry

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“…La, Cr codoping NaTaO 3 system is also developed by spray pyrolysis from aqueous and polymeric precursor solution. 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].…”

Section: Doping Strategiesmentioning

confidence: 96%

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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H2 evolution under visible light irradiation on La and Cr co-doped NaTaO3 prepared by spray pyrolysis from polymeric precursor

Cited by 44 publications

References 40 publications

High-Surface-Area Sodium Tantalate Nanoparticles with Enhanced Photocatalytic and Electrical Properties Prepared through Polymeric Citrate Precursor Route

High-Surface-Area Sodium Tantalate Nanoparticles with Enhanced Photocatalytic and Electrical Properties Prepared through Polymeric Citrate Precursor Route

Fluorination over Cr doped layered perovskite Sr2TiO4 for efficient photocatalytic hydrogen production under visible light illumination

Tantalate-based Perovskite for Solar Energy Applications

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