Abstract:In recent years, lead-free piezoelectric nanogenerators have attracted much attention because of their great potential for harvesting energy from the environment. Here, we report the first synthesis of two-dimensional (2D) single-crystal ZnSnO hexagon nanoplates and the fabrication of ZnSnO nanoplate-based nanogenerators. The orthorhombic perovskite-structured ZnSnO nanoplates with (111) facets of the exposed plate surface are successfully synthesized via a one-step hydrothermal reaction. Piezoelectric nanogen… Show more
“…In order to improve the output performance of PENG, finding new materials with higher piezoelectric coefficients has become the most directed method. Up to now, various types of PENGs have been reported, such as PbZrTiO 3 (PZT), BaTiO 3 (BTO), (1− x )(PbMg 1/3 Nb 2/3 O 3 )– x (PbTiO 3 ) (PMN–PT), GaN, and ZnSnO 3 . Among them, PZT and PMN–PT, with high piezoelectric properties, have been investigated and applied extensively as piezoelectric materials candidates.…”
With the rapid development of the Internet of things (IoT), flexible piezoelectric nanogenerators (PENG) have attracted extensive attention for harvesting environmental mechanical energy to power electronics and nanosystems. Herein, porous piezoelectric fillers with samarium/titanium-doped BiFeO 3 (BFO) are prepared by a freeze-drying method, and then silicone rubber is filled into the microvoids of the piezoelectric ceramics, forming a unique structure based on silicone rubber matrix with uniformly distributed piezoelectric ceramic. When subjected to external force stimulation, compared with conventional piezocomposite films found on undoped BFO without a porous structure, the PENG possesses higher stress transfer ability and thus boosts output performance. The notable enhancement in the stress transfer ability and piezoelectric potential is proven by COMSOL simulations. The PENG can exhibit a maximum open-circuit voltage (V oc ) of 16 V and shortcircuit current (I sc ) of 2.8 µA, which is 5.3 and 5.6 times higher than those of conventional piezocomposite films, respectively. The PENG can be used as a triggering signal to control the operation of fire extinguishers and household appliances. This work not only expands the application scope of lead-free piezoelectric ceramic for energy harvesting, but also provides a novel solution for self-powered mechanosensation and shows great potential application in IoT.
“…In order to improve the output performance of PENG, finding new materials with higher piezoelectric coefficients has become the most directed method. Up to now, various types of PENGs have been reported, such as PbZrTiO 3 (PZT), BaTiO 3 (BTO), (1− x )(PbMg 1/3 Nb 2/3 O 3 )– x (PbTiO 3 ) (PMN–PT), GaN, and ZnSnO 3 . Among them, PZT and PMN–PT, with high piezoelectric properties, have been investigated and applied extensively as piezoelectric materials candidates.…”
With the rapid development of the Internet of things (IoT), flexible piezoelectric nanogenerators (PENG) have attracted extensive attention for harvesting environmental mechanical energy to power electronics and nanosystems. Herein, porous piezoelectric fillers with samarium/titanium-doped BiFeO 3 (BFO) are prepared by a freeze-drying method, and then silicone rubber is filled into the microvoids of the piezoelectric ceramics, forming a unique structure based on silicone rubber matrix with uniformly distributed piezoelectric ceramic. When subjected to external force stimulation, compared with conventional piezocomposite films found on undoped BFO without a porous structure, the PENG possesses higher stress transfer ability and thus boosts output performance. The notable enhancement in the stress transfer ability and piezoelectric potential is proven by COMSOL simulations. The PENG can exhibit a maximum open-circuit voltage (V oc ) of 16 V and shortcircuit current (I sc ) of 2.8 µA, which is 5.3 and 5.6 times higher than those of conventional piezocomposite films, respectively. The PENG can be used as a triggering signal to control the operation of fire extinguishers and household appliances. This work not only expands the application scope of lead-free piezoelectric ceramic for energy harvesting, but also provides a novel solution for self-powered mechanosensation and shows great potential application in IoT.
“…Since last decade, ternary transition metal oxides (TTMOs) have gained tremendous popularity in the field of photocatalysis by the scientific community. To exploit solar light more efficiently, photocatalysts with narrow band gap (e.g., ZnSnO 3 [ 2 ], Bi 2 WO 6 [ 3 ], Ce(MoO 4 ) 2 [ 4 ] and ZnFe 2 O 4 [ 5 ]) have been used, for absorbance of solar light in the visible region. Among ternary metal oxides, transition metal ferrites have drawn a great attention in the field of photocatalysis.…”
ZnFe2O4 was fabricated by a simple solution-combustion method. The structural, optical and electronic properties are investigated by XRD, TEM, FESEM, UV–vis DRS, PL, FTIR and photocurrent measurements. The photocatalytic activity of the prepared material is studied with regard to the degradation of rhodamine B (Rh B) and Congo red under solar irradiation. The kinetic study showed that the material exhibits zeroth and first order reaction kinetics for the degradation of Rh B and Congo red, respectively. The photocatalytic behaviour of ZnFe2O4 was systematically studied as a function of the activation temperature. ZnFe2O4 prepared at 500 °C showed the highest activity in degrading Rh B and Congo red. The highest activity of ZnFe2O4-500 °C correlates well with the lowest PL intensity, highest photocurrent and lowest particle size.
“…ZnSnO 3 , including a polar LiNbO 3 (LN)‐type (space group: R 3 c , No. 161) and a perovskite‐type structure, is a metastable phase, which can partially decomposed into SnO 2 and Zn 2 SnO 4 above 750°C in atmosphere ambient . Son et al reported that ZnSnO 3 thin film could heteroepitaxially grow on SrTiO 3 (111) substrate and show a high ferroelectric polarization.…”
Section: Introductionmentioning
confidence: 94%
“…161) and a perovskite-type structure, is a metastable phase, which can partially decomposed into SnO 2 and Zn 2 SnO 4 above 750°C in atmosphere ambient. 10,11 Son et al 12 reported that ZnSnO 3 thin film could heteroepitaxially grow on SrTiO 3 (111) substrate and show a high ferroelectric polarization. Zn 2 SnO 4 has an inverse spinel structure with a space group of Fdm.…”
Zinc stannate (Zn 2 SnO 4 ) films were deposited on MgO (100) substrates by pulsed laser deposition, and Zn 2 SnO 4 monocrystalline films were obtained by postannealing process. The structures, surface morphologies, and optical properties of the Zn 2 SnO 4 films annealed at different temperatures were investigated in detail. Crystal structure analyses showed that the film annealed at 800°C was single crystal Zn 2 SnO 4 with an inverse-spinel structure. The heteroepitaxial mechanism was further clarified by a schematic diagram, and the epitaxial relationships between the film and substrate were Zn 2 SnO 4 (400)||MgO (200) with Zn 2 SnO 4 [001]||MgO [001]. The obtained Zn 2 SnO 4 films exhibited excellent transparency. The optical band gap of the 800°C-annealed Zn 2 SnO 4 film was about 3.97 eV. The extinction coefficients and refractive indexes of the Zn 2 SnO 4 films annealed at different temperatures as a function of wavelength were analyzed in detail. K E Y W O R D S film, heteroepitaxy, HRTEM, XRD, Zn 2 SnO 4 2556 | HE Et al. How to cite this article: He L, Luan C, Wang D, Le Y, Feng X, Ma J. Preparation and characterization of heteroepitaxial Zn 2 SnO 4 single crystalline films prepared on MgO (100) substrates. J Am Ceram Soc.
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