ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Bowei Xun,Aizhen Song,Jingru Yu,Yang Yin,Jing-Feng Li,Bo-Ping Zhang
BiFeO3-BaTiO3 is a promising high-temperature piezoelectric ceramic that possesses both good electromechanical properties and a Curie temperature (TC). Here, the piezoelectric charge constants (d33) and strain coefficients (d*33) of (1 – x)BiFeO3-xBaTiO3 (BF-xBT; 0.20 ≤ x ≤ 0.50) lead-free piezoelectrics were investigated at room temperature. The results showed a maximum d33 of 225 pC/N in the BF-0.30BT ceramic and a maximum d*33 of 405 pm/V in the BF-0.35BT ceramic, with TCs of 503 and 415 °C, respectively. To better understand the performance enhancement mechanisms, a phase diagram was established using the results of XRD, piezoresponse force microscopy, TEM, and electrical property measurements. The superb d33 of the BF-0.30BT ceramic arose because of its location in the optimum point in the morphotropic phase boundary, low oxygen vacancy (VO··) concentration, and domain heterogeneity. The superior d*33 of the BF-0.35BT ceramic was attributed to a weak relaxor behavior between coexisting macrodomains and polar nanoregions. The presented strategy provides guidelines for designing high-temperature BF-BT ceramics for different applications.
研究领域:
材料科学
·
物理学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 9
·5261-5268
·
IF 10.7
Jianwei Zhao,Hongtian Li,Yuxiao Du,Xiaoxin Chen,Hailan Qin,Jinming Wang,Tingnan Yan,Shuhui Yu,Yongming Hu,Dawei Wang
Lead-free ceramics have received considerable research interest because of their environmentally friendly characteristics and superb performance in energy storage applications, which are critical for pulsed power electronic systems. In this work, we sintered a series of (0.90 − x)BiFeO3–xBaTiO3–0.10CaHfO3 lead-free ceramics and comprehensively probed the crystallographic structure, grain morphology, electrical properties, etc., to assess their capability for use in energy storage applications. The 0.50BiFeO3–0.40BaTiO3–0.10CaHfO3 ceramic achieved an ultrahigh recoverable energy storage density of 4.70 J cm−3 and an outstanding energy conversion efficiency of 79% and can be considered an excellent material candidate for use in high-power energy storage devices.
研究领域:
材料科学
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电气工程
·
能量存储
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产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Yingtong Pan,Yiwen Tang,Ji-Xuan Liu,Guo-Jun Zhang
High-entropy engineering offers a new paradigm for catalyst design. In this study, a high-entropy BiFeO 3 -based catalyst was synthesized via rare-earth multi-element doping. Entropy engineering enhanced structural stability and oxygen vacancy concentration, which promoted iron redox cycling and the generation of reactive oxygen species, thereby boosting activity in Fenton reactions. The catalyst achieved 96.9 % rhodamine B degradation within 20 min ( k = 0.169 min −1 ) under neutral conditions. It retained 93.5 % activity after multiple cycles without ion leaching, demonstrating excellent stability, scalability, and durability. This work confirms the feasibility of high-entropy strategies in developing efficient and sustainable catalysts for water treatment applications.
研究领域:
催化
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材料科学
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环境工程
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Xiaohui Tang,Hongjun Zhang,Fangzhe Li,Dongliang Wang,Yong Huang,Hua Ke
Dielectric capacitors play an increasingly important role in power systems because of their fast charging and discharging speed. Applications are usually limited due to the low W rec . We design materials with high values of Δ P ( P max - P r ) and recoverable energy storage density( W rec ) from the high entropy perspective. Two single phases with a large Curie temperature T c difference have been selected, which leads to the enlarged entropy. The ceramics (Bi 0.85 Nd 0.1 Sm 0.05 ) 1- x Ba x )(Fe 1- x Ti x )O 3 (BNSBFT x ) are prepared by the solid-state reaction. As x increases, the corresponding configuration entropy( S config ) goes from 1.4 R to 1.52 R. The increased entropy destroys the long-range order, accompanied by the reduced remanent polarization( P r ) and the improved W rec . The W rec of BNSBFT 0.5 ceramics reaches 4.9 J/cm 3 at a low field of 250 kV/cm. Both temperature change(∼ 0.5% from 30 °C to 140 °C) and frequency variation(∼ 4.8% from 1 Hz∼50 Hz) in W rec show excellent stability.
研究领域:
材料科学
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能源工程
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产品关联
DOI
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 8
·1514
·
IF 4.324
Fang Cai,Ting Zhang,Qiong Liu,Pengran Guo,Yongqian Lei,Yi Wang,Fuxian Wang
Tetragonal CuBi2O4/amorphous BiFeO3(T-CBO/A-BFO) composites are prepared via a one-step solvothermal method at mild conditions. The T-CBO/A-BFO composites show expanded visible light absorption, suppressed charge recombination, and consequently improved photocatalytic activity than T-CBO or A-BFO alone. The T-CBO/A-BFO with an optimal T-CBO to A-BFO ratio of 1:1 demonstrates the lowest photoluminescence signal and highest photocatalytic activity. It shows a removal rate of 78.3% for the photodegradation of methylene orange under visible light irradiation for 1 h. XPS test after the cycle test revealed the reduction of Bi3+during the photocatalytic reaction. Moreover, the as prepared T-CBO/A-BFO show fundamentally higher photocatalytic activity than their calcinated counterparts. The one-step synthesis is completed within 30 min and does not require post annealing process, which may be easily applied for the fast and cost-effective preparation of photoactive metal oxide heterojunctions.Keywords:tetragonal CuBi2O4;amorphous BiFeO3;visible light absorption;charge carrier recombination;photocatalytic property
研究领域:
材料科学
·
环境科学
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DOI
PubMed
高影响因子
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
·
2025
·
IF 1.8
Yang-yang Xia,Cong-jie Yang,Xiao-huan Wang,Zhi-peng Yuan,Guo-wei Hu,Hexige Wuliji
Perovskite BiFeO 3 is a multifunctional oxide material with advantages such as low cost, high thermal stability, and low-thermal conductivity. Currently, research on BiFeO 3 mainly focuses on its multiferroic and optoelectronic properties, whereas studies on its electrical and thermal properties are relatively rare. Herein, first-principles calculations are employed to investigate the formation energies of 18 different dopants substituted at Bi sites in BiFeO 3 , including the isovalent anion Sb as well as cations with varying valence states. Bulk samples of pure porous BiFeO 3 and doped systems are prepared by solid-state sintering, and electrical and thermal properties are characterized. Pure BiFeO 3 exhibited a low electrical conductivity of 7.78 Sm −1 at 300 °C. Doping BiFeO 3 with Yb effectively tunes its porosity, which in turn modulates its electrical conductivity. The Yb-doped sample exhibits an electrical conductivity of 10.37 Sm −1 at 300 °C, representing an ≈33.3% increase compared to that of undoped BiFeO 3 . Although the thermal conductivity slightly rises from 0.96 to 1.26 Wm −1 K −1 at 300 °C, it remains relatively low compared to values reported in previous studies. This study provides new insights into the exploration of the electrical and thermal properties of BiFeO 3 materials.
研究领域:
材料科学
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凝聚态物理
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热电材料
·
陶瓷
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Jingquan Wang,Hongguang Guo,Yang Liu,Wei Li,Bo Yang
In this study, porous BiFeO 3 (BFO) was successfully synthesized by sol-gel method and employed as an activator for peroxymonosulfate (PMS) to degrade bisphenol AF (BPAF), an emerging contaminant in the water. Porous BFO were prepared and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and oxygen temperature programmed desorption (O 2 -TPD). Compared to the raw BFO, large improvement of BPAF removal was observed when using porous BFO to activate PMS. The influences of selected activating systems, PMS dosage, catalysts loading, initial pH and water matrix on the degradation efficiency were examined. The role of reactive oxygen species produced in the degradation process of BPAF were identified through chemical quenching experiments and electron spin resonance (ESR), which demonstrated that high performance of porous BFO/PMS on BPAF removal was ascribed to the co-oxidation of radicals (sulfate radical and hydroxyl radical) and non-radical reactive oxygen species (singlet oxygen). Based on the XPS and ESR results, this study proved that lattice oxygen on the surface of BFO participated in the formation of singlet oxygen and the oxygen vacancies were propitious for the catalytic degradation. The reaction pathways and the mechanism of BPAF degradation via the BFO/PMS system were also proposed.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zelin Shan,Fang Ma,Minghan Xu,Xiaoqing Shan,Lianbin Shan,Chongwei Cui,Haijuan Guo
Improving the yield of reactive oxygen species and inhibiting the recombination of photogenerated e - and h + have been reliable strategies to accelerate the rate-limiting step for nano photocatalytic materials. A novel magnetic Fe 3 O 4 @La-BiFeO 3 composite with variable molar ratios was successfully synthesized via a facile hydrothermal method for the photo-Fenton-like degradation of norfloxacin (NOR) under visible light irradiation. The comprehensive characterization of the crystal phase purity, morphological structure and elemental composition of the catalyst confirmed the formation of a heterojunction structure between Fe 3 O 4 and La-BiFeO 3 . The effects of the composite molar ratio, initial pH, catalyst addition, and H 2 O 2 concentration on the degradation efficiency were investigated. 20% Fe 3 O 4 @La-BiFeO 3 showed the best catalytic activity with 93.8% removal of NOR after 60 min of reaction and the pseudo-first-order rate constant was 0.05952 min −1 , attributed to the synergistic interaction of the photocatalytic and Fenton-like processes. The excellent stability and recyclability of the catalyst ensured the catalytic reactions continued to occur efficiently. The appropriate amount of Fe 3 O 4 reduced the band gap of the catalyst, and the introduction of a weak magnetic field accelerated the transfer of electrons between interfaces, effectively restrained the recombination of photogenerated e - /h + and directly enhanced the yield of ·OH and O 2 · - . This work not only realized the preparation of a heterogeneous photo-Fenton-like catalyst with high application potential for the degradation of antibiotics, but also provided new prospects for designing efficient catalysts on the basis of theoretical guidance.
研究领域:
环境科学
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材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Tianjiao Zhai,Jinyi Wang,Rui Min,Xu Su,Kai Ma,Guozhen Zhang,Tianhong Zhou
The cooperation of heterojunction and magnetic field can effectively improve the efficiency of photocatalytic degradation of pollutants. Herein, CoFe 2 O 4 /BiFeO 3 Z-scheme heterojunctions (CFO/BFO) were applied in the magnetic field-assisted photocatalytic reaction generated by a rotating permanent magnet for the degradation of berberine hydrochloride, which achieved a degradation rate of 96.49% and showed good stability and recoverability. The active substances controlling the reaction were holes and superoxide radicals . The excellent magneto-photocatalytic performances of CoFe 2 O 4 /BiFeO 3 can be attributed to the construction of the Z-scheme heterojunction, the magnetoelectric effect produced by the synergistic combination in the magnetic field, and the driving force of the Lorentz force for photocatalysis .
研究领域:
环境科学
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材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 21
·1-13
·
IF 2.8
Chen Xinyi,Hua Zhongqiu,Geng Chong,Ma Nan
High sensitivity and low detection limit are crucial parameters in evaluating the performance of gas sensors, particularly in detecting trace amounts of acetone gas in human respiration for diabetes monitoring purposes. In this study, a composite of YbFeO 3 –BiFeO 3 (YFO–BFO) was prepared using a facile method involving the calcination of a mixture of Yb 2 O 3 and BiFeO 3 , followed by acid treatment. It is revealed that the introduction of YbFeO 3 significantly improves the acetone gas sensitivity and reduces the operating temperature. At an optimized operating temperature of 200 °C, the response of YFO–BFO to 10 ppm acetone reaches 32.6, which is 16.6 times higher than that of BiFeO 3 at the optimized operating temperature of 280 °C. Moreover, the response to 400 ppb of acetone still has 7 even at the low temperature of 160 °C. YFO–BFO also exhibits a low limit of detection (25 ppb), good selectivity and stability. The excellent gas-sensing performance of YFO–BFO is mainly attributed to the formation of a p-p heterojunction and the increased Fe 2+ /Fe 3+ redox pairs. This work offers a novel approach for enhancing the acetone sensing properties of BiFeO 3 -based gas sensors, which may lead to the advancement of acetone sensors for the diagnosis of diabetes.
研究领域:
材料科学
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医学传感器
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Xilin Liao,Ting-Ting Li,Hai-Tao Ren,Zhiyong Mao,Xuefei Zhang,Jia-Horng Lin,Ching-Wen Lou
A BiFeO 3 /TiO 2 p-n heterojunction photocatalyst with ferroelectric synergistic effect under visible-light irradiation was developed through facile hydrolysis and precipitation by forming nanospheres of TiO 2 on BiFeO 3 nanocube to improve the photocatalytic efficiency. Analyses of the microstructure, optical properties , and photoelectrochemical performance indicate the formation of a core–shell heterostructure of BiFeO 3 /TiO 2 with excellent energy band matching. The BiFeO 3 /TiO 2 p-n heterojunction has enlarged specific surface area, higher sensitivity to visible-light, and improved separation and transfer efficiency of photoelectron-hole pairs than single TiO 2 and BiFeO 3 . Moreover, the composite exhibits superior photocatalytic degradation performance for methylene blue (MB) and common antibiotic tetracycline (TC) under UV and visible-light irradiation. The MB degradation rate within 180 min reaches 78.4% and 90.4% under UV and visible-light irradiation, respectively. Furthermore, the enhanced photocatalytic mechanism of BiFeO 3 /TiO 2 is explored by photoluminescence (PL), electrochemical impedance spectroscopy (EIS), transient photocurrent analysis, radical quenching, and band structure characterization.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 28
·23089-23096
·
IF 4.6
Yanhong Gu,Weiying Zhang,Yuen Li,Kelan Wang,Lanlan Ge,Xianghui Zhang,Jianguo Zhao,Zhenjiang Shen,Wanping Chen,Yaohua Hu
With a relatively narrow bandgap of around 2.0 eV, BiFeO3 (BFO) nanoparticles have been extensively investigated as an appealing visible-light photocatalyst. In this study, BFO nanoparticles prepared through a sol–gel method were explored as a tribocatalyst to degrade methyl orange (MO) solutions. With BFO nanoparticles stimulated through magnetic stirring using Teflon magnetic rotary disks, as much as 100% of 10 mg per L MO and 99% of 30 mg per L MO solutions were degraded after 20 min and 160 min of magnetic stirring, respectively. For reference, TiO2 nanoparticles (P25) were stimulated under the same conditions and degraded 97% of 10 mg per L MO and 97% of 30 mg per L MO solutions after 150 min and 540 min of magnetic stirring, respectively. The calculated MO degradation rate constants for BFO at concentrations of 10 mg per L and 30 mg per L were 4.94 h−1 and 1.19 h−1, respectively, while the corresponding values for P25 were 0.86 h−1 and 0.40 h−1, respectively. Free radical trapping experiments showed that positive holes are by far the most important active species in the tribocatalytic degradation of MO by BFO. These findings suggest that in addition to its versatile applications, multiferroic BFO is promising for converting mechanical energy into chemical energy through tribocatalysis.
研究领域:
材料科学
·
环境科学
·
催化
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）