JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Shuzhi Zhang,Panpan Lv,Yuxin Cui,Tong Pan,Wentao Yang,Hang Zhan,Jia Wang,Ruihang Li,Cuncheng Li,Luchao Ren,Mingwei Zhang
Lead-free dielectric capacitors have been garnering increasing attention for pulsed power applications owing to their green sustainability. BiFeO 3 (BFO) is widely researched in association with dielectric energy-storage applications, owing to its large saturated polarization and high Curie temperature. However, it suffers from serious leakage problems. In this work, BFO-based thin films with different stacking structures are designed and fabricated by introducing a linear dielectric material, SrTiO 3 (STO). The experimental results and finite-element simulations indicate that the polarization and breakdown strength can be simultaneously optimized by regulating the position of the STO layer. In particular, a recoverable energy density of 70 J/cm 3 and efficiency of 60 % is achieved in sandwiched Bi(Fe 0.93 Mn 0.05 Ti 0.02 )O 3 /SrTiO 3 /Bi(Fe 0.93 Mn 0.05 Ti 0.02 )O 3 (BFMTO/STO/BFMTO) film, owing to the synergistic effect of different dielectrics as well as the blocking effect of the interface. The capacitor exhibits a wide operating temperature window (-100–125 °C) and high frequency stability (1–20 kHz), as well as strong fatigue durability (2 × 10 7 cycles). These results demonstrate that the BFMTO/STO/BFMTO film is a promising ecofriendly material for advanced power-capacitor applications.
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Xuan Liu,Jie Chao,Feifei Guo,Liangliang Chang,Zengzhe Xi
To address rapid carrier recombination and low magnetic separation efficiency in piezocatalysis, Gd/Ni co-doped BiFeO3 nanoparticles were synthesized via a sol–gel method. Rietveld refinement confirmed lattice distortion and secondary phase formation at high doping levels. Gd/Ni doping induces a phase transition in BFO from rhombohedral to orthorhombic, with the Pnma proportion reaching 84.15% at x = 0.09. Gd/Ni co-doping induced 12.7% oxygen vacancy concentration, suppressing electron–hole recombination, while enhanced Dzyaloshinskii–Moriya interaction increased saturation magnetization by 17.85-fold (magnetic recovery > 95%). The optimized sample (x = 0.09) achieved 80.94% ofloxacin degradation in 120 min (twice that of pristine BiFeO3), retaining 71.53% efficiency after 4 cycles. Radical trapping and EPR identified ˙OH and ˙O2− as dominant species, revealing a ferroelectric–piezoelectric synergistic mechanism. This work provides a strategy for designing magnetically recoverable piezocatalysts for complex wastewater treatment.
研究领域:
环境催化
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功能材料学
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纳米材料
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环境化学
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水处理技术
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Lin Tang,Xuefan Zhou,Muhammad Habib,Jinzhu Zou,Xi Yuan,Yan Zhang,Dou Zhang
As a promising lead-free high-temperature piezoelectric material , BiFeO 3 –BaTiO 3 (BF-BT) is still under debate on its crystal structure, especially for the compositions in the morphotropic phase boundary (MPB). Herein, the crystal structure of (1- x )BF- x BT ceramics near the MPB with x = 0.20–0.33 was analyzed by X-ray diffraction and Raman spectroscopy . With the addition of BT, the phase transition from distorted rhombohedral to pseudo-cubic structure was determined by Rietveld refinement . Raman analysis showed the weakening interactions between the A-site cations and BO 6 octahedron, as well as the degenerated distortions of BO 6 octahedron. Intriguingly, the results of X-ray photoelectron spectroscopy suggested the inhibition of Fe 3+ reduction and decrease in oxygen vacancy concentration by the incorporation of BT. In terms of the electrical properties, the significant decline in Curie temperature , improvement in permittivity, and reduction in high-temperature dielectric loss can be observed with the increase of BT content. The increased remnant polarization, enhanced dielectric response and decreased coercive field were helpful for the piezoelectric performance. The maximum room-temperature piezoelectric coefficient of ∼160 pC/N and high-temperature piezoelectric coefficient of ∼324 pC/N were acquired in the x = 0.30 ceramics. This work provides a clear scope for further research on the structural transformation and high-temperature piezoelectric applications of BF-BT system.
研究领域:
材料科学
·
陶瓷
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压电材料
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晶体学
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电学性质
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 7
·1-18
·
IF 2.8
Du Ze,Li Yanmei,Kuang Daihong,Wang Wenquan,Yang Fangyuan,Yang Jiadong,Hou Liang
BiFeO 3 @GO nanocomposite fibers were successfully synthesized by the electrospinning and simple ultrasound method. The structure, morphology, optical, composition and magnetic properties of BiFeO 3 @GO samples were characterized by XRD, FT-IR, SEM, TEM, UV–Vis and XPS analyses. The results showed that the removal of organic dye pollutants was enhanced by novel BiFeO 3 @GO fibers through the adsorption–photocatalytic synergy. The removal rates of methylene blue (MB), Congo red (CR), Rhodamine B (RHB) and norfloxacin (NOR) dyes were increased by 64.5%, 33.6%, 43% and 61.1%, respectively. Then it was a benefit to remove MB when the pH is between 6.0 and 10.0, while it was favorable for adsorption in a neutral environment and photocatalysis in an acidic or alkaline environment. The adsorption process of MB dyes was more in line with the pseudo-second-order kinetic model for BiFeO 3 @GO nanocomposite sample with 3 mg graphene oxide weight (GO 3 ). The adsorption data were well fitted by Langmuir adsorption isotherm, which indicated that the adsorption process was a monolayer adsorption. The adsorption of MB dyes on GO 3 nanocomposite fibers appeared to be a favorable process (0 < R L < 1). Moreover, the trapping experiments showed that · OH was the main active substance during photocatalysis, and the FT-IR tests indicated that nanocomposite fibers can degrade MB into CO 2 and H 2 O under the synergistic effect of adsorption and catalysis.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Jia Qi,Nan Ma,Xiaochen Ma,Rainer Adelung,Ya Yang
Ferroelectric materials can be utilized for fabricating photodetectors because of the photovoltaic effect. Enhancing the photovoltaic performance of ferroelectric materials is still a challenge. Here, a self-powered ultraviolet (UV) photodetector is designed based on the ferroelectric BiFeO3 (BFO) material, exhibiting a high current/voltage response to 365 nm light in heating/cooling states. The photovoltaic performance of the BFO-based device can be well modulated by applying different temperature variations, where the output current and voltage can be enhanced by 60 and 75% in heating and cooling states, respectively. The enhancement mechanism of the photocurrent is associated with both temperature effect and thermo-phototronic effect in the photovoltaic process. Moreover, a 4 × 4 matrix photodetector array has been designed for detecting the 365 nm light distribution in the cooling state by utilizing photovoltage signals. This study clarifies the role of the temperature effect and the thermo-phototronic effect in the photovoltaic process of the BFO material and provides a feasible route for pushing forward practical applications of self-powered UV photodetectors.
研究领域:
材料科学
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光子学
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电气工程
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Xilin Liao,Ting-Ting Li,Hai-Tao Ren,Zhiyong Mao,Xuefei Zhang,Jia-Horng Lin,Ching-Wen Lou
Herein, a simple and effective visible-light driven photoelectrochemical (PEC) aptasensor was designed using BiFeO 3 @TiO 2 nanocomposites for accurate and rapid detection of microcystin-LR (MC-LR). This composite was obtained by coupling p-type BiFeO 3 nanoparticles with n-type TiO 2 nanosphere to constructed a p-n heterojunction. This p-n heterojunction not only could narrow the band-gap of TiO 2 from 3.14 eV down to 2.14 eV of BiFeO 3 @TiO 2 , resulting in superior utilization of visible light. More importantly, it also could accelerate charge separation/transfer leading to enhanced photoelectrochemical (PEC) performance of BiFeO 3 @TiO 2 . Based on these excellent optoelectronic performances of BiFeO 3 @TiO 2 composite, a PEC aptasensor with “turning on” signal mechanism was constructed by aminated aptamer as a biorecognition probe. The constructed PEC aptasensor performed gratifying analytical property toward MC-LR with a low detection limit of 0.016 pM (S/N = 3) and a wide detection range (5.0 × 10 −5 ∼ 2.5 × 10 2 nM). This PEC aptasensor possessed promising potential application value for its precise selective and ultrasensitive for MC-LR in practical analysis.
研究领域:
环境科学
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分析化学
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材料科学
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DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Renshu Wang,Meixuan Wu,Lin Miao,Baocheng Zhou,Pengfei Sun,Xiaoping Dong
Antibiotic pollution has drastically threatened human health and aquatic ecosystem, and current technologies are confronted with inevitable limitations. Herein, we used BiFeO 3 (BFO) as catalyst, and employed an ultrasound-assistant strategy to activate peroxydisulfate (PDS) for degrading antibiotic contaminants. The synthetic conditions including hydrothermal temperature and time were optimized, and the optimal BFO catalyst could completely decompose Tetracycline hydrochloride (TC, 15 mg l -1 ) in 30 min. The degradation rate of the BFO/PDS/US system is 4.76, 3.98 and 7.14 times higher than those of the PDS/US, BFO/US (piezoelectric catalysis) and BFO/PDS (Fenton-like process) systems, implying the synergistic effect. The influence of reaction conditions on the TC removal was investigated, including TC concentration, pH, and inorganic salt. This technology was demonstrated to possess high efficiency for different antibiotics and aquatic environments, and have good cycling durability. Different reactive oxygen species (ROSs), •SO 4 - , •OH, •O 2 - and 1 O 2 , were generated during the activation process. The coexistence of Bi 3+ /Bi 5+ and Fe 2+ /Fe 3+ in BFO was confirmed, and the relative content of Fe 3+ increased after reaction, indicating the cycle process of Fe 2+ /Fe 3+ . Therefore, a synergistic mechanism of piezoelectric catalysis and Fenton-like activation was proposed to explain the ultrasound-assistant PDS activation by BFO for degradation antibiotics. Finally, the intermediates were detected and their possible toxicities were assessed, which proved the treatment could effectively decrease the potential risk of TC wastewater to environment.
研究领域:
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
Journal of Advanced Dielectrics
·
2024
·
IF 2.1
Yao Feng,Jinhua Li,Hao Yan
In this work, a series of BiFeO 3 /ZnO composites with varying molar ratio of BiFeO 3 to ZnO (Bi:Zn = 2.5:1, 5:1, 10:1, 20:1) have been synthesized via a one-step hydrothermal method and evaluated for their efficiency in rhodamine B (RhB) degradation performance. The morphology results reveal that the microsphere-shaped ZnO is dispersed on the surface of the blocky-like BiFeO 3 , with intimate contact between the two phases. It has been found that the maximum piezocatalytic activity could be achieved at BiFeO 3 /ZnO molar ratio of 5:1, with a degradation rate up to 92% for RhB. Compared with pure BiFeO 3 and ZnO, the composites have superior piezocatalytic degradation performance. The reason for the enhanced piezocatalytic dye degradation rate may be that the BiFeO 3 /ZnO composites effectively separate the positive and negative charges to reduce the recombination of positive and negative charges. These active species, such as superoxide radicals ( O 2 • − ) in the process of piezocatalytic, are proved on the active species capture experiments. The BiFeO 3 /ZnO composites have good piezocatalytic degradation performance, which provides an option for collecting vibration energy to degradation dye wastewater in the future.
研究领域:
材料科学
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环境催化
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纳米材料
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压电催化
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DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2024
·
IF 2.8
Guo Yaping,Li Jing,Zhang Jin,Wang Xiujv
The photocatalyst S-scheme BiFeO 3 –g-C 3 N 4 had been prepared by combining calcination and hydrothermal reaction. 10% BiFeO 3 –g-C 3 N 4 composite showed the greatest photocatalytic effect during tetracycline hydrochloride degradation (TC-HCl, 99.7% removal) within 100 min. Meantime, the photocatalytic efficacy was further confirmed by the removal efficiency of ciprofloxacin(CIP, 98.2% removal). The formation of S-scheme heterostructure and matching valence band and conduction band may be responsible for the improved photocatalytic efficiency of BiFeO 3 –g-C 3 N 4 . This leads to the rapid separation of photo-induced carriers, increased electronic transport capacity, and extended carrier lifetime. A study was done on the potential mechanism by employing chemical scavenger experiment revealing the paramount role of O 2 − . The composite could maintain photocatalytically stable even after five consecutive reaction cycles. The recovery efficiency of 10% BiFeO 3 –g-C 3 N 4 was high because of the magnetic property of BiFeO 3 , which was convenient for the recycling process. The produced photocatalyst has potential use in the field of photocatalysis, and this work provides a novel thought to raise the photocatalysts recovery efficiency during recycling.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
Nano-Micro Letters
·
2022
·Vol. 14
·期 1
·1-14
·
IF 23.655
Han Xiao,Ji Yun,Wu Li,Xia Yanlong,Bowen Chris R.,Yang Ya
Coupled nanogenerators have been a research hotspot due to their ability to harvest a variety of forms of energy such as light, mechanical and thermal energy and achieve a stable direct current output. Ferroelectric films are frequently investigated for photovoltaic applications due to their unique photovoltaic properties and bandgap-independent photovoltage, while the flexoelectric effect is an electromechanical property commonly found in solid dielectrics. Here, we effectively construct a new form of coupled nanogenerator based on a flexible BiFeO 3 ferroelectric film that combines both flexoelectric and photovoltaic effects to successfully harvest both light and vibration energies. This device converts an alternating current into a direct current and achieves a 6.2% charge enhancement and a 19.3% energy enhancement to achieve a multi-dimensional "1 + 1 > 2" coupling enhancement in terms of current, charge and energy. This work proposes a new approach to the coupling of multiple energy harvesting mechanisms in ferroelectric nanogenerators and provides a new strategy to enhance the transduction efficiency of flexible functional devices.
研究领域:
纳米技术
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材料科学
·
能量收集
·
机电系统
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产品关联
DOI
PubMed
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 29
·e02906
·
IF 2
Haojun Zhang,Gengrui Zhao,Shaoting Ma,Bin Zhang
Graphical A novel method enhances triboelectric nanogenerator (TENG) output by using La-doped bismuth ferrite nanoparticles as the triboelectric layer filler. Under the filler concentration threshold, the output performance of the TENG with 1.5 wt% La-doped BFO fillers is significantly enhanced compared to that with undoped BFO fillers. Additionally, a self-powered anticorrosion system is developed using this TENG as the energy source. Incorporating high-permittivity nanoparticles as fillers into triboelectric layers is an effective strategy to enhance the output performance of triboelectric nanogenerators (TENG). However, exceeding the critical filler concentration threshold causes nanoparticle aggregation, limiting further output performance enhancement of TENG. Here, a novel approach is proposed to enhance TENG output performance by doping lanthanum (La) into bismuth ferrite (BFO), forming La-doped BFO nanoparticle fillers (BLFO) to further improve the output performance of polyvinylidene fluoride (PVDF)-based TENG without increasing filler concentration. This approach overcomes the limitation of nanoparticle aggregation at high filler loadings while significantly enhancing the output performance of TENG. Below the critical concentration threshold, the dielectric constant of BLFO/PVDF composites increases by 32% compared to undoped BFO/PVDF composites. Consequently, the BLFO/PVDF-based TENG achieves a high output voltage of 329 V and short circuit current of 44 µA, representing 43% and 69% increases over the BFO/PVDF-based TENG, respectively. Notably, these values represent 219% and 193% increases compared to the pure PVDF-based TENG. Furthermore, a self-powered anticorrosion system powered by the BLFO/PVDF TENG demonstrates effective metal protection, as evidenced by open-circuit potential measurements and reduced average corrosion rates.
研究领域:
能量收集
·
材料科学
·
纳米技术
·
电化学
·
防腐保护
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Lu Jing,Weili Li,Chang Gao,Menglu Li,Weidong Fei
Polymer-based dielectric capacitors are well recognized for high energy density and efficiency. However, the energy density is restricted by the deterioration of breakdown strength with excessive addition of inorganic fillers. Herein, an innovative design of the lamellar-structured BiFeO 3 @TiO 2 (BFO@TO) fillers is proposed and a small amount of BFO@TO is added into P(VDF-HFP)/PMMA blended polymer to fabricate BFO@TO-P(VDF-HFP)/PMMA composites, which delivers an outstanding energy density of 19.3 J cm −3 at 549.2 kV mm −1 . The filler possesses a BFO/TO/BFO triple-layered structure. Due to the different Fermi level, electrons are injected from TO into BFO to form electron accumulation layer and construct the heterojunction electric fields between TO and BFO layers. Heterojunction electric fields at two interfaces produced by the triple-layered structure are opposite. The opposite double heterojunction can withstand larger external electric field and improve the breakdown strength. Besides, BFO, as a narrow bandgap semiconductor, is easier for electrons and holes to separate, which further widens the width of the built-in electric field and reduces the dielectric breakdown. Electric field distribution simulations intuitively confirm the enhancement of the breakdown strength. The results provide an effective strategy to address the critical issue of improving the breakdown strength for high energy storage capability.
研究领域:
材料科学
·
电气工程
·
能源存储
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）