Journal of Materials Chemistry C
·
2015
·Vol. 3
·期 18
·4706-4712
·
IF 4.696
Linxing Zhang,Jun Chen,Jiangli Cao,Dongyu He,Xianran Xing
The destructive readout signal distinguishing the ferroelectric polarization state in a memory device has long been seen as the bottleneck for its commercial application. Both ferroelectric resistive switching and the switchable photovoltaic effect provide multiple choices for non-destructive readout. The polycrystalline ferroelectric BiFeO3-based thin films fabricated by cost-effective chemical solution growth exhibit large resistive switching (with ON/OFF ratios ∼104), which is comparable to switchable diodes and tunnel junctions. Furthermore, switchable photovoltaic response shows stable switching and good retention properties. The standard hysteretic loops of resistive switching current, short circuit current and open circuit voltage versus poling voltage directly indicate hysteretic modulation by ferroelectric polarization, which is the first evidence in polycrystalline BiFeO3 based films. The present films would be potential candidates for non-destructive ferroelectric memory devices with multiple selections.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Gang Chen,Xiaodong Peng,Chunlin Fu,Wei Cai,Rongli Gao,Peigeng Fan,Xin Yi,Hongqi Yang,Cong Ji,Hualei Yong
(0.95– x ) BaTiO 3 –0.05 BiYbO 3 – x BiFeO 3 ( x = 0, 0.01, 0.02, and 0.04) (abbreviated as (0.95– x ) BT–0.05 BY– x BFO) ceramics were fabricated by conventional sintering (CS) and microwave sintering (WS) methods. Effects of sintering method and BFO dopant on the microstructure and electric properties of (0.95– x ) BT–0.05 BY– x BFO ceramics were comparatively investigated. X-ray diffraction showed that all CS and WS samples presented a single perovskite phase. It was also found that WS ceramics possessed denser microstructure and finer grains compared to CS samples as indicated by the surface morphology characterization. Dielectric measurements revealed that all samples exhibited the weak relaxation behavior; however, the degree of relaxation behavior of BT–BY based ceramic could be strengthened by addition of BFO and by WS method. Moreover, the temperature and frequency stability could be improved with doped BFO. The density of 0.93BT–0.05BY–0.02BFO ceramic was found to be the largest while that of 0.94BT–0.05BY–0.01BFO ceramic was the smallest, thus, the dielectric constant of 0.93BT–0.05BY–0.02BFO was significantly larger than that of 0.94BT–0.05BY–0.01BFO and 0.94BT–0.05BY–0.04 BFO ceramics. minimum dielectric constant of (0.95– x ) BT–0.05 BY– x BFO ceramic was obtained at x = 0.01. Ferroelectric measurements indicated that all samples showed the slim hysteresis loop. The remnant polarization ( P r ) and coercive field ( E C ) of (0.95– x ) BT–0.05 BY– x BFO ceramics first decreased and then increased with increasing x ，the minimum values were obtained at x = 0.01. Moreover, P r and E C of WS ceramics were slightly larger than those of CS ceramics, indicating that higher density and larger grain sizes contributed to enhancing the ferroelectric characteristic. These findings indicate that addition of moderate amount of BFO and use of WS technique can strengthen the degree of relaxation behavior and improve the ferroelectric properties of BT–BY based ceramics.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2022
·
IF 7.34
Xin Wang,Xue-Song He,Chun-Yu Li,Shi-Lin Liu,Wen Lu,Zheng Xiang,Yang Wang
The development of efficient sonocatalysts is of great significance to the treatment of antibiotic wastewater. Herein, an S-scheme sonocatalyst Cu 2 O/BiFeO 3 has been fabricated using a simple synthesis method, in which Cu 2 O nanoparticles grow on the surface of BiFeO 3 . Tetracycline (TET) was selected as a representative pharmaceutical model to systematically evaluate the sonocatalytic performance of the Cu 2 O/BiFeO 3 . The experimental results showed that optimized Cu 2 O/BiFeO 3 (CBF-3) has superior sonocatalytic performance to TET (98.0 %, 0.02302 min −1 ), which is much higher than that of pure BiFeO 3 (54.6 %, 0.00515 min −1 ). Combined with the experimental result and characterization analysis, the sonodegradation mechanism was discussed. The improved sonocatalytic performance can be ascribed to the S-scheme charge transfer mechanism between Cu 2 O and BiFeO 3 , which can simultaneously inhibit sonoelectron-hole recombination, promote carrier transfer, maintain high redox capacity, and generate more active substance. The possible intermediate products and degradation pathways of TET over CBF-3 were analyzed by ion chromatography and liquid chromatography-mass spectrometry. Furthermore, the results of the bacterial toxicity test indicated that the toxicity of the reaction solution decreased significantly after sonodegradation. This study provides a simple way for the rational design and successful preparation of S-scheme sonocatalyst with promising applications in the remediation of the water environment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2017
·Vol. 85
·期 2
·356-368
·
IF 1.575
Wang Ting,Song S. -H.,Wang X. -L.,Chen J. -J.,Tan M. -L.
Substitution-induced modifications in structural, magnetic and optical properties of Nb doped and Sm–Nb co-doped BiFeO 3 nanoparticles are reported. X-ray diffraction and Raman analyses indicate that the phase transforms from a rhombohedral to orthorhombic one due to Nb doping and Sm–Nb co-doping. The Nb doping and Sm–Nb co-doping both can lead to a decrease in particle size and an enhancement in magnetic properties, but there is a much stronger effect for the Sm–Nb co-doping than for the Nb doping. With increasing doping concentration of Nb and Sm, the maximum and remanent magnetizations first increase and then drop down, i.e., there is a maximum value in both maximum and remanent magnetizations. The optimal maximum and remanent magnetizations are obtained as 0.601 and 0.155 emu/g, respectively, at y = 0.05 for BiFe 1 - y
Nb
y
O 3 nanoparticles, while they are 0.954 and 0.206 emu/g at x = 0.15 for Bi 1 - x
Sm
x
Fe 0.95 Nb 0.05 O 3 nanoparticles. Meanwhile, the corresponding optical energy band gap of these samples decreases from 2.16 to 2.02 eV with increasing Sm–Nb co-doping concentration, indicating a strong absorption of visible light. Consequently, the magnetic and optical properties of BiFeO 3 nanoparticles can be improved considerably by doping high-valence transition and rare earth elements. Graphical
研究领域:
材料科学
·
纳米科技
·
凝聚态物理
·
功能材料
·
多铁性材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Chaoyu Peng,Anze Shui,Hulei Yu,Xinrong Zhong
The development of ceramic capacitors with superior energy storage capabilities (>5 J/cm 3 ) under moderate electric fields (300–500 kV/cm) is essential for their practical integration into advanced electronic devices. Here, (1- x )(0.67BiFeO 3 -0.33BaTiO 3 )- x Na(Ta 0.5 Nb 0.5 )O 3 ( x = 0–0.25) ceramics are successfully synthesized, demonstrating exceptional energy storage performance. Specifically, the appropriate introduction of the Na(Ta 0.5 Nb 0.5 )O 3 can disrupt the long-range ordered structure in the ferroelectric samples and suppress the octahedral distortion, promoting the formation of polar nanoregions and reducing the remanent polarization. Meanwhile, a large bandgap and conductive activation energy endow it with a high breakdown strength. As a result, a high recoverable energy storage density of 6.44 J/cm 3 and a high energy storage efficiency of 87 % are achieved in the as-synthesized 0.8BFBT-0.2NTN samples under 440 kV/cm, with excellent frequency stability, temperature stability, and fatigue stability. This work presents a viable strategy for improving the energy storage properties of BiFeO 3 -based ceramics under moderate electric fields, offering significant potential for next-generation energy storage applications.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Cijun Shuai,Xingming Long,Yingxin Yang,Bingxin Sun,Zihao Zhang,Guoyong Wang,Shuping Peng
Bacterial infection is a severe challenge after artificial transplantation due to the lack of an antibacterial functional implant, which results in delayed healing or even transplant failure. Herein, a sonodynamic antibacterial strategy was proposed by integrating a BiFeO3/Ti3C2 heterojunction into a three-dimensional-printed poly-L-lactic acid scaffold. BiFeO3 can be stimulated using ultrasonic energy to generate carriers. Ti3C2, with good conductivity, can form an interfacial transfer channel with BiFeO3, accelerating interfacial charge transfer. Additionally, forming a Schottky barrier between BiFeO3 and Ti3C2 effectively suppressed electron backflow. The separation of electron–hole pairs was significantly enhanced, thus improving the yield of reactive oxygen species. The results demonstrated that the antibacterial scaffold exhibited antibacterial rates of 93 and 91% against Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus exposed to ultrasound, respectively. Additionally, the poly(L-lactic acid)-BiFeO3/Ti3C2 scaffold possessed good biocompatibility and showed great potential for bone regeneration.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
·
生物材料
·
抗菌治疗
·
组织工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Rongshuo Guo,Linghua Jin,Ye Zhang
Piezo-catalysis emerges as an efficient, safe, and affordable strategy for removing hazardous substances from aquatic environments. Here, the BiFeO 3 @In 2 Se 3 heterojunction demonstrates remarkable prowess as a piezo-catalyst, enabling the high-efficiency removal of uranium (U) from U(VI)-containing water. A total U(VI) removal efficiency of 94.6% can be achieved under ultrasonic vibration without any sacrificial agents. During the entire catalytic process, piezo-induced electrons, hydroxyl radicals, and superoxide radicals play important roles in U(VI) removal, while the generated H 2 O 2 is responsive to the transformation of soluble U(VI) into insoluble (UO 2 )O 2 •2H 2 O and UO 3 . Furthermore, auxiliary illumination can accelerate the increase of free charges, enabling the piezo-catalyst to retain more charges. This leads to an improved U(VI) removal efficiency of 98.8% and a significantly increased reaction rate constant. This study offers a comprehensive analysis of the fabrication of high-efficiency piezo-catalysts in the removal or extraction of U(VI) from U(VI)-containing water.
研究领域:
环境科学
·
材料科学
·
核工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2018
·
IF 3.046
Ting Wang,Qing Ma,S.-H. Song
Pure and Ba-Zr co-doped multiferroic BiFeO 3 nanopowders are synthesized via sol-gel method. X-ray diffraction demonstrates the transformation of crystal structure (from R3c to R3c + P4mm) and the absence of impurity phase. Scanning electron microscopy and transmission electron microscopy indicate that the co-doping leads to a decrease in particle size and the Bi 0.85 Ba 0.15 Fe 0.95 Zr 0.05 sample has a particle size of 30–60 nm. Surprisingly, the room-temperature magnetization hysteresis loops change to be soft ferromagnetic with co-doping. The maximum and remnant magnetizations of the as-prepared nanopowders first increase and then decrease with increasing dopant concentration with the Bi 0.85 Ba 0.15 Fe 0.95 Zr 0.05 sample having the best magnetic properties. The enhanced magnetization is due to the crystal lattice distortion caused by the ionic-radius difference between the substituent and host elements and the suppression of the antiferromagnetic spiral spin structure induced by the size effect of the nanopowders.
研究领域:
材料科学
·
纳米科技
·
多铁性材料
·
固态化学
·
磁学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2014
·
IF 2.307
S.-H. Song,Q.-S. Zhu,L.-Q. Weng,V.R. Mudinepalli
BiFeO 3 ferrite ceramics were synthesized by spark plasma sintering (SPS) and conventional solid-state synthesis in conjunction with high-energy ball milling. They were evaluated by different characterization techniques such as X-ray diffraction, scanning electron microscopy, and dielectric , ferroelectric and magnetic measurements. The 750 °C-SPS prepared ceramic samples possessed a single perovskite structure and they were compared with the conventionally synthesized ones. The relative density and average grain size were approximately 95% and <200 nm for the SPS-prepared samples, while they were about 89% and >300 nm for the conventionally prepared ones. In comparison with the conventionally synthesized ceramics, the SPS-prepared ones exhibited improved dielectric, ferroelectric and magnetic properties . These should be associated with high-density, fine-grained and uniform microstructure created by SPS in conjunction with high-energy ball milling, which could be a promising technique for fabricating high-quality BiFeO 3 multiferroic ceramics.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Ting Wang,X.-L. Wang,S.-H. Song,Qing Ma
Multiferroic Nd/Sm-doped BiFeO 3 ceramics synthesized at 700 °C by spark plasma sintering in conjunction with sol-gel precursor powders are investigated by X-ray diffraction, scanning electron microscopy, dielectric , ferroelectric and magnetic measurements. With the doping content of Nd/Sm beyond 10 mol%, the crystal structure changes from R 3 c to coexistence of Pbam and R 3 c . It is also revealed that the grain size for all samples greatly decreases and the dielectric, ferroelectric and magnetic properties are obviously improved with Nd/Sm doping. The optimized remanent polarization are about 1.451 μC/cm 2 and 3.448 μC/cm 2 for the 10 mol% Nd-doped and 15 mol% Sm-doped BiFeO 3 ceramics, respectively. Because of the reduced concentration of oxygen vacancies , the leakage current density of Nd/Sm-doped ceramics decreases more than two orders of magnitude compared to the pure BiFeO 3 sample. The maximum remanent magnetization for the Sm-doped ceramics is approximately 0.279 emu/g, which is higher than that for the Nd-doped samples (0.263 emu/g).
研究领域:
材料科学
·
凝聚态物理
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2018
·
IF 6.945
Shuo Li,Guangshan Zhang,Heshan Zheng,Yongjie Zheng,Peng Wang
In this study, BiFeO 3 (BFO) powders decorated on nickel foam (NF) with a high catalytic activity are prepared via a one-step microwave-assisted hydrothermal method . The factors that influence the degradation of bisphenol A (BPA) with BFO/NFs as catalysts are optimized to improve the catalytic activity in a microwave-enhanced Fenton-like process. BFO/NF exhibit a superior catalytic activity with a high BPA removal ratio (98.4%) and TOC removal ratio (69.5%) within 5 min. Results indicate that NF significantly affect the improvement of the catalytic activity of BFO because it served as a source of hydroxyl radicals (•OH) during degradation. The amount of • OH generated by BFO/NF is approximately 1.65-fold higher than that by pure BFO. After six reaction cycles, the stability and reusability of • OH remain high. These findings provide new insights into the synthesis of composites on heterogeneous catalysts with high efficiency and easy recyclability for water treatment applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xinqi Chen,Wenjing Lv,Zhili Shi,Pujia Cheng,Kaidong Zhan,Yaqi Liu,Fan Wu,Quinn Qiao
The photovoltaic conversion of heterojunction solar cells relies on the interface properties between n-type and p-type semiconductors. N-type TiO 2 -nanoarray (NA), ferroelectric BiFeO 3 interlayer, and p-type BiOI were used to fabricate a ternary bulk heterojunction using a solution-based method in this study. Solid-state solar cells of FTO/TiO 2 -NA/BiFeO 3 /BiOI/spiro-OMeTAD/Ag are constructed for the first time, and their photo-electric conversion performance is studied. The addition of a BiFeO 3 interlayer at the interface between TiO 2 -NA and BiOI increased the solar cell open-circuit voltage ( V oc ) from 0.18 to 0.47 V and the short-circuit current ( J sc ) from 0.29 to 0.54 μA/cm 2 , resulting in a nearly 5-fold increase in power conversion efficiency. The Kelvin Probe force microscope analysis confirmed that the polarization electric-field ( E self ) generated by the BiFeO 3 interlayer is directed toward BiOI, thereby increasing the surface potential and decreasing electron and hole back flows between TiO 2 and BiOI. This additional electric field caused greater charge concentrations and a greater V oc . Furthermore, the E self directed toward the BiOI increased the built-in electric field ( E bi ) in the space charge area from TiO 2 to BiOI, allowing for greater separation of photogenerated electrons and holes and thus raising the J sc . The findings of this study suggested that manipulating internal electric fields via polarization could be an effective method for enhancing the performance of solar cells based on BiOI.
研究领域:
材料科学
·
光伏技术
·
纳米技术
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）