Nano Energy
·
2022
·
IF 19.069
Yuan Liu,Yun Ji,Yanlong Xia,Li Wu,Chris R. Bowen,Ya Yang
The photocurrent generated by ferroelectric materials via the photovoltaic effect has latent applications in opto-electronic devices due to the introduction of a polarization-induced charge carrier separation and transport, which is absent in semiconducting p-n junctions. However, the precise mechanism of photocurrent production in photoelectric devices by a range of ferroelectric materials remains a topic of continued interest. Here we report a significant enhancement in the photocurrent of a ferroelectric Bi 0.5 Na 0.5 TiO 3 -based photoelectric device by ferro-pyro-phototronic effect. When compared with the generated photocurrent under illumination alone, the peak and platform photocurrents induced by the simultaneous use of both light and heating can be increased by 131% and 57%, respectively. The increase in photocurrent is found to increase with temperature, where the mechanism of enhancement is associated with the increase in pyroelectric coefficient, photoexcited carrier concentration and carrier mobility at higher operating temperatures . These factors also lead to a rapid response time of 84.2 ms. This work provides guidelines for photocurrent promotion in ferroelectric devices, pushing forward the potential applications of ferroelectric materials for self-powered photodetectors .
研究领域:
材料科学
·
光学工程
·
电子工程
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Peng Wang,Wanqian Cai,Fangyuan Yu,Ping Zhou,Mei Lin,Cong Lin,Tengfei Lin,Min Gao,Chunlin Zhao,Xiangqi Li,Xiao Wu
The decaying photocatalytic rate caused by carrier recombination is a thorny problem that has not been properly solved. Improvement of photocatalysis can be achieved through structural innovation, diversification of catalytic modes, or a combination of both. Herein, effective separation of photo-generated carriers in Bi 0·5 Na 0·5 TiO 3 /ZnO composites was achieved by heterojunction construction for energy band regulation and synchronously mechanical energy harvesting from piezoelectric effect. The formation of heterojunctions between Bi 0·5 Na 0·5 TiO 3 and ZnO was confirmed by electron microscopy and analysis of X-ray photoelectron spectroscopy spectra. The degradation performance of Rhodamine B, a representative industrial dye contaminant, was optimized through the formation of Bi 0·5 Na 0·5 TiO 3 /ZnO heterojunctions and ultrasonic vibration harvesting. Their band structures were described in detail and electrochemical tests were performed to substantiate a novel Z-scheme heterostructure that can explain the carrier separation and transfer processes in catalysis. The piezoelectric polarization field generated by the piezoelectric effect of both Bi 0·5 Na 0·5 TiO 3 and ZnO coordinates perfectly with the photocatalysis , enabling the piezo-photocatalysis. Our research opens a promising avenue in alleviating charge carrier complexation through heterojunction construction and mechanical strain for future pollutants degradation via catalysis.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 9
·610
·
IF 3.2
Zhang Hang,Zhang Weijun,Ye Hu,Wang Fenglin,Zhou Yujiu,Chen Xingyu,Liu Zhuofeng,Li Wei,Mao Haijun
The ongoing miniaturization and integration of electronic devices are imposing stringent demands on the energy storage performance of dielectric ceramics under low electric fields. NaNbO 3 (NN), an environmentally friendly and low-cost antiferroelectric (AFE) dielectric ceramic, shows significant potential in this context. However, the instability of its AFE P -phase under low electric fields results in unfavorable polarization behavior, which limits its energy storage performance. To overcome this limitation, we introduced the perovskite ferroelectric material Bi 0.5 Na 0.5 TiO 3 (BNT) with high maximum polarization ( P max ) into the NN matrix. With increasing BNT content, the crystal structure transitions from the AFE P -phase to a more stable AFE R -phase. This phase transition is accompanied by enhanced relaxor behavior, which in turn leads to slimmer polarization–electric field ( P-E ) hysteresis loops and a reduced remnant polarization ( P r ). In addition, the P max of NN ceramic is also enhanced,. The 0.85NaNbO 3 -0.15Bi 0.5 Na 0.5 TiO 3 (NN-0.15BNT) ceramic exhibits a P max of 16.73 μC/cm 2 at 100 kV/cm, a value approximately three times higher than that of pure NN ceramic ( P max = 5.63 μC/cm 2 ). Consequently, under a low electric field of 100 kV/cm, the NN-0.15BNT ceramic achieves a recoverable energy storage density ( W rec ) of 0.65 J/cm 3 and an efficiency ( η ) of 87.6%, representing nearly fourfold ( W rec = 0.16 J/cm 3 for NN) and twofold ( η = 45.1% for NN) enhancements, respectively, over pure NN. The achieved performance is competitive with other lead-free relaxor ferroelectrics under similar low-field conditions. The synergistic optimization strategy proposed in this work provides a valuable guideline for designing high-performance energy storage ceramics suitable for low-electric-field applications.
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产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 106
·期 8
·4723-4731
·
IF 3.9
Weixian Luo,Meixia Wu,Yifeng Han,Xiang Zhou,Laijun Liu,Qiuwei He,Pengrong Ren,Haiming Yang,Hui Yang,Qiao Wang,Zihao Chen,Xihui Liang,Zhifeng Chen
Dielectric ceramics with both excellent energy storage and optical transmittance have attracted much attention in recent years. However, the transparent Pb-free energy-storage ceramics were rare reported. In this work, we prepared transparent relaxor ferroelectric ceramics (1 − x )Bi 0.5 Na 0.5 TiO 3 – x NaNbO 3 (BNT– x NN) by conventional solid-state reaction method. We find the NN-doping can enhance the polarization and breakdown strength of BNT by suppressing the grain growth and restrained the reduction of Ti 4+ to Ti 3+ . As a result, a high recoverable energy-storage density of 5.14 J/cm 3 and its energy efficiency of 79.65% are achieved in BNT–0.5NN ceramic at 286 kV/cm. Furthermore, NN-doping can promote the densification to improve the optical transmittance of BNT, rising from ∼26% ( x = 0.2) to ∼32% ( x = 0.5) in the visible light region. These characteristics demonstrate the potential application of BNT– x NN as transparent energy-storage dielectric ceramics.
研究领域:
材料科学
·
陶瓷
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能量存储
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光电子学
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铁电材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Mingxuan Sun,Xiaojing Lin,Xianglong Meng,Wenzhu Liu,Zhipeng Ding
Herein, a series of TiO 2 /Bi 0.5 Na 0.5 TiO 3 heterojunctions with different mass ratio are first constructed under ultrasound irradiation, which shows superior sonocatalytic and photoelectrochemical properties. The improved performance is attributed to the internal electric field and close interfacial contact of TiO 2 and Bi 0.5 Na 0.5 TiO 3 , which promote the transfer of photoinduced electrons from TiO 2 to Bi 0.5 Na 0.5 TiO 3 . The spontaneous polarization of ferroelectrics in the heterostructures can be adjusted by ultrasonic treatment durations, which further influences the internal electric field. The TiO 2 /Bi 0.5 Na 0.5 TiO 3 sample with mass ratios of 5:1 and ultrasonic treatment for 15 min presents the highest sonocatalytic degradation of Rhodamine B. Moreover, the sonocatalytic activity also shows a close relevant to the ultrasonic temperature and frequency of degradation process. And, the •OH radicals are mainly responsible for Rhodamine B sonodegradation. This work provides a novel TiO 2 /Bi 0.5 Na 0.5 TiO 3 heterojunctions and promotes the application of ferroelectrics modified materials in sono-/photo-catalysis.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
Coatings
·
2024
·Vol. 14
·期 11
·1392
·
IF 2.9
Yangyang Zhang,Hui Li,Erping Wang,Jingxia Gao,Liqin Yue,Miao Zhao,Ling Zhang
NaNbO3-based ferroelectric composites are regarded as a highly promising typical energy storage material. In this work, 0.02xMnO2−(1−x)NaNbO3−xBi0.5Na0.5TiO3composites were prepared by the solid-state sintering method and their microstructure, energy storage performance, and temperature stability were analyzed. As observed by the SEM images, the addition of Bi0.5Na0.5TiO3to NaNbO3in appropriate amounts can effectively suppress grain growth, which is beneficial for improving the breakdown field strength. Whenx= 0.3, an optimal value of 210 kV/cm is achieved. Meanwhile, as 2θ = 33.2°, the most intense XRD peak can be observed, indicating excellent solid solubility between the phase components. Consequently, 0.006MnO2–0.7NaNbO3–0.3Bi0.5Na0.5TiO3composites demonstrated an impressive discharging storage density of 2.464 J/cm3and a considerable energy storage efficiency of 85.8%. In addition, within the temperature range of 30–80 °C, the fluctuation in energy storage density remains below 10%. All the above performances indicate that this type of material exhibits excellent practicality in the field of pulse power supply.
研究领域:
材料科学
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 30
·65414-65421
·
IF 5.6
Mingyang Chen,Juanjuan Wang,Biao Chen,Fusheng Lai,Zhanhui Peng,Xiaolian Chao,Yanmin Jia
Various industrial dye wastewaters are difficult to treat and have resulted in serious environmental problems. The recent tribocatalytic technology, which degrades dyes by harvesting friction energy, has brought great hope. The ferroelectric property is helpful for enhancing charge transfer and storage, which is expected to result in the strong tribocatalytic performance for dye wastewater treatment. In this study, (1- x )Bi 0.5 Na 0.5 TiO 3 - x SrTiO 3 (abbreviated as (1- x )BNT- x ST, x = 0.2, 0.25, 0.3, 0.35, 0.4) particles are produced employing the traditional solid-state sintering technique. It is found that the 0.7BNT-0.3ST powder catalyst can behave has the maximum tribocatalytic performance with a 96 % degradation ratio for Rhodamine B (RhB) dyes after being stirred for 3.5h. The experiments demonstrate that these primary active substances during the catalytic process are ⋅OH and h + . The 0.7BNT-0.3ST has excellent ferroelectric properties and high dielectric constant, which may contribute to the excellent tribocatalytic performance. Furthermore, degradation ratio of RhB dye by 0.7BNT-0.3ST powder can still reach 89 % after three cycles. The ferroelectric 0.7BNT-0.3ST powder, with its advantages of excellent catalytic performance, simple synthesis route, and low cost, is an ideal option for the water purification by harvesting the friction energy has potential application prospects.
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Shuo Zhang,Hua Hao,Rui Huang,Minghe Cao,Zhonghua Yao,Hanxing Liu
The development of effective material modification strategies to enhance the energy-storage performance in dielectric film capacitors remains a critical research focus. Typically, it is difficult to achieve a comprehensive improvement with one single strategy, constrained by complicated interrelationships in materials. Herein, a multiscale modulation strategy is designed in Bi0.5Na0.5TiO3(NBT)-based films. Incorporation of Bi3.25La0.75Ti3O12(BLT) synergistically optimizes the domain structure and microstructure evolution at the multiscale, contributing to the generation of highly dynamic polar nanoregions, reduced grain sizes, low remnant polarization, and enhanced breakdown strength. Consequently, the 0.8NBT–0.2BLT film exhibits a high energy-storage density of 52.2 J cm–3 and a high efficiency of 70.1% under a high breakdown field of 1836 kV cm–1, accompanied by exceptional fatigue endurance, thermal stability, and frequency stability. This multiscale modulation strategy offers a tremendous opportunity for customizing and optimizing the synthetic capability of dielectric materials for energy-storage applications.
研究领域:
材料科学
·
铁电材料
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能量存储
·
介电材料
·
薄膜技术
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2022
·
IF 6.137
Yaoshen Ye,Kaixin Guo,Ruirui Cui,Min Zhang,Xu Wang,Majed A. Bajaber,Chaoyong Deng
The energy storage density of ferroelectric capacitors is mainly determined by their polarization and breakdown strength . In this work, the energy storage performance of BNT thin films was enhanced by introducing an amorphous alumina to construct Al 2 O 3 -Bi 0.5 Na 0.5 TiO 3 (AO-BNT) heterojunctions by sol-gel process. The results reveal that the Bi 0.5 Na 0.5 TiO 3 /Al 2 O 3 /Bi 0.5 Na 0.5 TiO 3 (BNT/AO/BNT) structure significantly improves the breakdown strength of BNT, the breakdown electric field is increased from 1050 to 3082 kV/cm, and the energy storage density is also increased from 8.7 to 19.9 J/cm 3 . This is mainly due to the built-in electric field formed by the opposite double-heterojunction can counteract part of the external electric field, and this capacitor-like structure concentrated more applied electric field on the amorphous alumina with better breakdown ability, thus provides a new way to improve the energy storage performance of dielectric ferroelectric capacitors.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 7
·4846-4853
·
IF 3.5
Shunshun Jiang,Ji Zhang,Dmitry V. Karpinsky,Jinglei Li,Lisha Liu,Yaojin Wang
As one of the important electronic components, the dielectric capacitors for energy storage applications have been extensively studied in recent years. Among various dielectric materials, the perovskite oxide Bi 0.5 Na 0.5 TiO 3 -based ceramics have become promising candidates due to their high polarization, dielectric tunability, environment-friendly composition, and so forth. Herein, the relaxor ferroelectric ceramics of Bi 0.5 Na 0.5 TiO 3 –SrTiO 3 –Bi(Mg 0.5 Zr 0.5 )O 3 were prepared via solid-state reaction method. The sample with optimal composition not only retains the high polarization by introducing Bi 3+ ions, but also achieves the reduced remanent polarization by enhancing relaxor behavior and the promoted electric breakdown strength by the grain size refinement. Accordingly, a high recoverable energy density of 8.3 J/cm 3 under 450 kV/cm and the superb charge/discharge properties (current density C D = 1200 A/cm 2 , power density P D = 150 MW/cm 3 , charge/discharge time t 0.9 = 0.15 µs) are achieved, revealing great prospect in energy storage applications.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Peng Wang,Shiqi Zhong,Ying Wang,Liyao Zou,Fangyuan Yu,Cong Lin,Mei Lin,Min Gao,Chunlin Zhao,Xiao Wu,Chao Chen
The pursuit of high-performance piezo-photocatalysts through structural modifications has been a focal point of investigation within the realm of related scientific disciplines. In this study, we successfully designed Er-doped Bi 0.5 Na 0.5 TiO 3 –BaTiO 3 combined with rare earth ion doping and solid solution modification, and the prepared particles exhibited homogeneous grain sizes and optimized concentrations of oxygen vacancies ( O V ). The synergistic incorporation of O V (accelerator for catalytic reaction) and Er 3+ results in an impressive 12-fold enhancement of the piezo-photocatalytic rate when degrading the Rhodamine B dye. The optimal composition 0.96BNT-0.04BT-Er demonstrates outstanding electrochemical properties , including a superior photocurrent response and minimal impedance, highlighting its exceptional performance in piezo-photocatalysis. The fundamental enhancement in catalytic performance can be attributed to the reconfiguration of the band structure of 0.96BNT-0.04BT-Er, which has been meticulously calculated utilizing DRS and VB-XPS and the internal mechanism was explained in detail. This research serves as a source of inspiration for the investigation of solid solutions among piezo-photocatalysts and sheds light on the vital role of band structure in governing catalytic performance.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Huihui Liu,Yiping Wang,Jun Chen,Junhong Zhao,Kai Xia,Ying Yang
The practical application of lead-free Bi0.5Na0.5TiO3 (BNT)-based piezoelectric ceramics is limited by the persistent trade-off between piezoelectric coefficient (d33) and thermal stability, which conventional compositional strategies fail to resolve. Here, we propose a grain engineering approach to decouple this property conflict by directly designing the microstructure of BNT-based ceramics at the morphotropic phase boundary. Rather than relying on complex chemical modifications, grain morphology is modulated to regulate the ferroelectric-to-relaxor transition. The optimized ceramic exhibits a d33 of ∼180 pC/N, a coercive field Ec of 23.6 kV/cm, a remnant polarization Pr of 34.5 μC/cm2, and a depolarization temperature (Td) of 125 °C, while maintaining less than 2% variation in d33 from 30 to 110 °C. This temperature-insensitive d33 originates from grain-engineered multiphase coexistence, which maintains a high piezoelectric response while stabilizing the field-induced long-range ferroelectric order against thermal depolarization. These findings highlight grain engineering as a robust microstructural strategy for developing high-performance, temperature-stable lead-free piezoceramics, paving the way for their use in high-precision devices under fluctuating thermal environments.
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DOI
高影响因子
危险品化学品经营许可证（带存储）