Size controllable synthesis of single-crystal ferroelectric Bi4Ti3O12 nanosheet dominated with {0 0 1} facets toward enhanced visible-light-driven photocatalytic activities

He, Hongquan; Yin, Jiao; Li, Yingxuan p; Zhang, Ying; Qiu, Han‐Yue; Xu, Jinbao; Xu, Tao; Wang, Chuanyi

doi:10.1016/j.apcatb.2014.03.003

Cited by 149 publications

(52 citation statements)

References 52 publications

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“…3,[6][7][8][9][10][11][12][13][14] Among these photocatalysts, TiO 2 -based photocatalysts have been extensively studied on account of their high activity, long-term stability, and low cost. 15 Unfortunately, TiO 2 mainly harvests the ultraviolet (UV) light (about 4% of the solar energy), which restrains its utilization of the sunlight. Thus, developing efficient photocatalysts is crucial for H 2 production from water under visible-light irradiation.…”

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confidence: 99%

Enhanced photocatalytic H₂ evolution over CdS/Au/g-C₃N₄ composite photocatalyst under visible-light irradiation

Ding

Zhao

et al. 2015

APL Materials

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confidence: 99%

Enhanced photocatalytic H₂ evolution over CdS/Au/g-C₃N₄ composite photocatalyst under visible-light irradiation

Ding

Zhao

et al. 2015

APL Materials

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“…It is well known that the photocatalytic efficiency can be improved by different ways, including reducing size [12], controlling morphology [13,14], doping low-valence ions to form oxygen vacancy [15] and so forth. Among these methods, producing oxygen vacancy is efficient as it can obviously enhance the transfer of an electron or hole by trapping the electron or hole or any scavenger and limiting the electron-hole recombination [16,17].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, photocatalytic performance and negative thermal expansion property of nanorods ZrMo2−x V x O8−x/2 with cubic structure

Liu

Fan

Liu

et al. 2015

J Sol-Gel Sci Technol

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Cubic ZrMo 2-x V x O 8-x/2 (0 B x B 0.5) compounds, with well-defined nanorods morphology, were synthesized by a facile sol-gel process without using any surfactant or template. The resulting products were characterized by the X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermal mechanical analyzer and UV-vis diffuse reflectance spectra (UV-vis DRS). The results indicated that V-doping did not influence the crystal structure and negative thermal expansion (NTE) property, but made rods size increase. Narrowed band gap was observed in V-doped ZrMo 2 O 8 . The resultant V-doped ZrMo 2 O 8 samples, as compared with pure ZrMo 2 O 8 , exhibited improved UV-light photocatalytic activity, during the photocatalytic degradation of rhodamine B. The mechanism was supposed that the V-doping gave rise to the formation of oxygen vacancies which could enhance photocatalytic performance by reducing the recombination of electrons and holes. In addition, cubic ZrMo 2-x V x O 8-x/2 also displayed reliable recycling photocatalytic performance and satisfying UVlight catalytic activity for the organic pollutant. Furthermore, all of the resulting cubic ZrMo 2-x V x O 8-x/2 showed excellent NTE property from 25 to 450°C. Graphical Abstract TEM images of (a) pure ZrMo 2 O 8 and (b) ZrMo 1.7 V 0.3 O 7.85 ; (c) RhB degradation under UVlight illumination for 180 min in the presence of cubic ZrMo 2-x V x O 8-x/2 (x = 0, 0.1, 0.2, 0.3, 0.4 and 0.5) photocatalysts.

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“…These high temperatures favor the growth of large plate-like particles that facilitates the processing of textured ceramics as will be explained later. The use of eutectic KCl/NaCl mixtures allows the reduction of synthesis temperatures (800 • C-2 h) [34] leading to small particles as the ones observed in Figure 4 that improve the Bi 4 Ti 3 O 12 photocatalytic activities. (f) Microwave assisted synthesis.…”

Section: Processing Of Ceramics With Aurivillius Type Structurementioning

confidence: 99%

Review and Perspectives of Aurivillius Structures as a Lead-Free Piezoelectric System

Moure

2018

Applied Sciences

104

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According to the EU-Directives 2002/95/EC, 2002/96/EC, lead-based piezoceramics must be substituted in the future with more environmentally friendly alternatives, only when a reliable alternative is found. This is why an increasing interest has grown in the research community to find lead free piezoelectric materials that fulfil the requirements for this substitution. Different families of compounds have been shown to be possible candidates for this use, such as bismuth and niobates based perovskites, pyrochlores, etc. However, a material with piezoelectric coefficients similar to those of PZT (lead zirconate titanate, Pb[Zr x Ti 1-x ]O 3 ) has not been yet found. Besides, each of these families has its specific characteristics in terms of remnant polarization, coercive field or application temperature. Thus, the choice of each material should be made according to the specific needs of the application. In this sense, Aurivillius-type structure materials (also known as Bismuth Layered Structure Ferroelectrics, BLSF) can take advantage of their specific properties for uses as Lead Free Piezoelectric systems. Some of them have a high Curie temperature, which make them good candidates to be used as high temperature piezoelectrics; high coercive fields, which facilitates their use as actuators; or a high switching fatigue resistance, which can be useful for future applications as Ferroelectric Random Access Memories (FERAM).Keywords: bismuth layered ferroelectric structures; aurivillius; piezoelectric; multiferroic OverviewMany of the peculiar characteristic properties of Aurivillius materials are determined by their crystalline structure. Figure 1 shows the prototype of the Aurivillius structure as a function of the number of pseudo-perovskite layers [2]. The "n" values can range from 1 to ∞. In this case (n = ∞), the repeated cell is the pure perovskite. The number of perovskites can be odd, even or a mixture. Examples of each case are Bi 2 WO 6 (n = 1) and Bi 4 Ti 3 O 12 (n = 3); Bi 3 TiNbO 9 , SrBi 2 Nb 2 O 9 (n = 2) and CaBi 4 Ti 4 O 12 (n = 4); an example for a mixture Aurivillius is Bi 7 Ti 4 NbO 21 . In this case, layers with 2 or 3 pseudo-perovskites are alternated with the [Bi 2 O 2 ] 2+ layers.At difference of the ferroelectrics with perovskite structure, the polarization is not produced by the displacement of the B cation within the oxygen octahedral but by relative shifts of the oxygen octahedral through the a-axis with respect to the [001] bismuth chain. They can be divided in 3 main movements, as illustrated in references [3-5]:Oxygen octahedral in the a-axis. -Relative displacements in the opposite direction to B cations of the perovskite with respect to the octahedral. -Displacement through the a-axis of the oxygen ions of the Bi-O layer.

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Size controllable synthesis of single-crystal ferroelectric Bi4Ti3O12 nanosheet dominated with {0 0 1} facets toward enhanced visible-light-driven photocatalytic activities

Cited by 149 publications

References 52 publications

Enhanced photocatalytic H₂ evolution over CdS/Au/g-C₃N₄ composite photocatalyst under visible-light irradiation

Enhanced photocatalytic H₂ evolution over CdS/Au/g-C₃N₄ composite photocatalyst under visible-light irradiation

Synthesis, photocatalytic performance and negative thermal expansion property of nanorods ZrMo2−x V x O8−x/2 with cubic structure

Review and Perspectives of Aurivillius Structures as a Lead-Free Piezoelectric System

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Size controllable synthesis of single-crystal ferroelectric Bi4Ti3O12 nanosheet dominated with {0 0 1} facets toward enhanced visible-light-driven photocatalytic activities

Cited by 149 publications

References 52 publications

Enhanced photocatalytic H2 evolution over CdS/Au/g-C3N4 composite photocatalyst under visible-light irradiation

Enhanced photocatalytic H2 evolution over CdS/Au/g-C3N4 composite photocatalyst under visible-light irradiation

Synthesis, photocatalytic performance and negative thermal expansion property of nanorods ZrMo2−x V x O8−x/2 with cubic structure

Review and Perspectives of Aurivillius Structures as a Lead-Free Piezoelectric System

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Enhanced photocatalytic H₂ evolution over CdS/Au/g-C₃N₄ composite photocatalyst under visible-light irradiation

Enhanced photocatalytic H₂ evolution over CdS/Au/g-C₃N₄ composite photocatalyst under visible-light irradiation