CuO-doped NaNbO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>antiferroelectrics: Impact of aliovalent doping and nonstoichiometry on the defect structure and formation of secondary phases

Erünal, Ebru; Jakes, Peter; Körbel, Sabine; Acker, Jérôme; Kungl, Hans; Elsässer, Christian; Hoffmann, Michael J.; Eichel, Rüdiger‐A.

doi:10.1103/physrevb.84.184113

Cited by 24 publications

(18 citation statements)

References 58 publications

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“…Moreover, the relative of O 1s/Cu 2p is 1.14 for Re-AgBr/CuO and 0.97 for AgBr/CuO, which indicating that the mole ratio of O and Cu for Re-AgBr/CuO is greater than the stoichiometric ratio of CuO (O/Cu¼1). This mainly because there are a great quantity of gain boundary and rough surface on the catalyst, these sites are easy to adsorption oxygen molecules and form a nonstoichiometric compound [27,31]. Abundant adsorbed oxygen molecules are one of the ways to reach higher oxidizability of CuO and keep the Cu element in the 2 þ state.…”

Section: Xps Analysismentioning

confidence: 99%

Facile regeneration and photocatalytic activity of CuO-modified silver bromide photocatalyst

Wang

Zhang

Liu

et al. 2015

Materials Science in Semiconductor Processing

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Section: Xps Analysismentioning

confidence: 99%

Facile regeneration and photocatalytic activity of CuO-modified silver bromide photocatalyst

Wang

Zhang

Liu

et al. 2015

Materials Science in Semiconductor Processing

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“…Erünal et al. investigated the interplay between aliovalent CuO doping and nonstoichiometry on the development of defect structures and the formation of secondary phases of antiferroelectric NaNbO 3 ceramics . Recently, Shi et al.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Density Functional Study on Mono‐ and Codoped NaNbO₃ for Visible‐Light Photocatalysis

Wang

Chen

et al. 2016

ChemPhysChem

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Monodoping with Mo, Cr, and N atoms, and codoping with Mo-N and Cr-N atom pairs, are utilized to adjust the band structure of NaNbO3 , so that NaNbO3 can effectively make use of visible light for the photocatalytic decomposition of water into hydrogen and oxygen, as determined by using the hybrid density functional. Codoping is energetically favorable compared with the corresponding monodoping, due to strong Coulombic interactions between the dopants and other atoms, and the effective band gap and stability for codoped systems increase with decreasing dopant concentration and the distance between dopants. The molybdenum, chromium, and nitrogen monodoped systems, as well as chromium-nitrogen codoped systems, are unsuitable for the photocatalytic decomposition of water by using visible light, because defects introduced by monodoping or the presence of unoccupied states above the Fermi level, which promotes electron-hole recombination processes, suppress their photocatalytic performance. The Mo-N codoped NaNbO3 sample is a promising photocatalyst for the decomposition of water by using visible light because Mo-N codoping can reduce the band gap to a suitable value with respect to the water redox level without introducing unoccupied states.

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“…However, since the melting points of two carbonates lie in the temperature range of 800-900°C, loss of alkali ions cannot be ruled out during calcination in this temperature range, prior to the chemical reaction among the precursors. This loss is expected to lead to the deficiency of A-site cations in KNN lattice and hence creation of defect complexes and high conductivity [25,26].…”

Section: Resultsmentioning

confidence: 99%

Effect of high density and reduced ionic defects on piezoelectric behavior of K0.5Na0.5NbO3 ceramic

Gupta

Priya

2014

Appl. Phys. A

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A reduced concentration of ionic defects along with [99 % of the theoretical density has been achieved for K 0.5 Na 0.5 NbO 3 ceramic by employing a twofold sintering technique. Lower concentration of ionic defects resulted in an order of magnitude improvement in the resistivity and hence enhanced poling of the ceramic at 100°C. High density and improved poling of the ceramic resulted in a significant improvement in electromechanical properties while maintaining the high orthorhombictetragonal (T o-t ) and Curie (T c ) temperatures of K 0.5 Na 0.5-NbO 3 (200 and 395°C respectively). A comparison with the previous studies suggested that the piezoelectric properties of the ceramic synthesized in this study were similar to those synthesized using complex techniques such as spark plasma sintering and hot pressing. This is a significant advancement facilitating the possibility of transition of K 0.5 Na 0.5 NbO 3 ceramic toward device application.

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CuO-doped NaNbO3antiferroelectrics: Impact of aliovalent doping and nonstoichiometry on the defect structure and formation of secondary phases

Cited by 24 publications

References 58 publications

Facile regeneration and photocatalytic activity of CuO-modified silver bromide photocatalyst

Facile regeneration and photocatalytic activity of CuO-modified silver bromide photocatalyst

Hybrid Density Functional Study on Mono‐ and Codoped NaNbO₃ for Visible‐Light Photocatalysis

Effect of high density and reduced ionic defects on piezoelectric behavior of K0.5Na0.5NbO3 ceramic

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CuO-doped NaNbO3antiferroelectrics: Impact of aliovalent doping and nonstoichiometry on the defect structure and formation of secondary phases

Cited by 24 publications

References 58 publications

Facile regeneration and photocatalytic activity of CuO-modified silver bromide photocatalyst

Facile regeneration and photocatalytic activity of CuO-modified silver bromide photocatalyst

Hybrid Density Functional Study on Mono‐ and Codoped NaNbO3 for Visible‐Light Photocatalysis

Effect of high density and reduced ionic defects on piezoelectric behavior of K0.5Na0.5NbO3 ceramic

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Hybrid Density Functional Study on Mono‐ and Codoped NaNbO₃ for Visible‐Light Photocatalysis