RSC Advances
·
2025
·Vol. 15
·期 38
·31508-31521
·
IF 4.6
Donghai Li,Yunrui Xu,Shilin Zhang,Linping Wang
To improve the utilization of solar energy and the efficiency of photocatalytic organic pollutant degradation, novel Z-scheme heterojunctions with high visible light catalytic performances have been widely developed. Herein, a novel Z-scheme BiFeO3/Ag/g-C3N4 heterojunction with a hierarchical 1D/0D/2D structure and visible light absorption was constructed by matching the suitable band structure between 1D BiFeO3 and 2D g-C3N4 and employing the localized surface plasmon resonance (LSPR) effect of 0D Ag nanoparticles. BiFeO3 nanofibers were synthesized via the electrospinning technique, providing short electron transport paths and visible light absorption range for g-C3N4. Plasmonic Ag nanoparticles were photodeposited on the surface of BiFeO3 to enhance the separation efficiency of the photogenerated electron–hole pairs between the bulk interfaces. UV-vis DRS, PL, photocurrent and EIS spectra confirmed the important roles of Ag and BiFeO3 in improving the photocatalytic activity of the Z-scheme heterojunction. The working principle of the BiFeO3/Ag/g-C3N4 Z-scheme heterojunction was proposed, indicating that ˙O2− and ˙OH are the main active species for the photocatalytic degradation of methylene blue (MB). The prepared BiFeO3/Ag/g-C3N4 heterojunction exhibited the highest photocatalytic activity, where its rate constant was 5.84 times higher than that of the pristine BiFeO3 and 3.26 times higher than that of the pristine g-C3N4. This study offers a new means for the design of novel high-performance photocatalysts, which can be a promising candidate in industrial applications.
研究领域:
光催化
·
材料科学
·
环境科学
·
纳米技术
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Keyang Shang,Yongbo Fan,Yuxin Jia,Xinghong Chen,Zhenhai Yang,Huiqing Fan,Weijia Wang
The poor electrical properties and high leakage current of BiFeO 3 -BaTiO 3 -based ceramics are the main reasons that hinder their application. A two-step sintering method prepared the 0.68Bi 1-x La x (Fe 99.8% Sb 0.2 % )O 3 -0.32BaTiO 3 ceramics (x = 0, 0.005, 0.01, 0.015, abbreviated as BL x FS-BT). The surface morphology and properties of the ceramic were observed and tested using different techniques. La ion doping significantly affects the crystal structure, leakage current, and the electro-induced strain of the BL x FS-BT ceramics. BL 0.005 FS-BT ceramics achieve 0.198 % unipolar electro-induced strain and 396 pm/V inverse piezoelectric coefficient under a 50 kV/cm electric field, and they can maintain good temperature stability at high temperatures. A large strain of 0.43 % was obtained at 150 °C. The inhibition effect of La ion on Fe valence and oxygen vacancy formation also greatly improves the insulation performance of ceramics. This work shows that BF-BT-based ceramics via ion substitution defect engineering effectively enhance electrical and insulating properties.
研究领域:
材料科学
·
电物理学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Min Zhang,Zihao Zheng,Fengyuan Dong,Jinming Guo,Bin Yang,Peixuan Jing,Yang Li,Ce-Wen Nan,Yuan-Hua Lin
Multilayer ceramic capacitors (MLCCs) with ultrahigh power density are fundamental components in the modern electronics industry. However, the relatively low energy density or/and efficiency are still limited by high conduction losses and hysteresis loss. To address these issues, we propose a simple and efficient design in high-entropy 1/3BiFeO 3 -1/3BaTiO 3 -1/3Ca 0.5 Sr 0.5 TiO 3 ceramics (abbreviated as BFBCST) through three different sintering aids (CuO, MgO, MnO 2 ). With optimized sintering aids, the optimal sintering temperature is reduced by 150 to 975°C. Meanwhile, the synergistic strategy effectively minimizes hysteresis loss by lowering the domain switching barriers and decreases conduction losses by suppressing the volatilization of Bi 3+ and minimizing valence variations of Fe 3+ and Ti 4+ . Therefore, an ultrahigh energy storage density of 17.9 J cm −3 with a high efficiency of 94.4% is simultaneously achieved under an electric field of 905 kV cm −1 in BFBCST-based MLCCs with MnO 2 sintering aid. This approach should be universally applicable to designing high-performance dielectrics, which holds promise for extensive applications in MLCCs.
研究领域:
材料科学
·
电子器件
·
陶瓷与介电材料
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储能技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 27
·14316-14325
·
IF 14.511
Tao Cui,Ji Zhang,Jian Guo,Xiongjie Li,Shun Guo,Yu Huan,Jing Wang,Shan-Tao Zhang
Ceramic-based dielectric capacitors have attracted ever-increasing interest owing to their wide applications in high-power and pulsed-power electronic systems. Nevertheless, synchronously achieving ultrahigh recoverable energy storage density (Wrec) and high efficiency (η) in dielectric ceramics is still a great challenge. Herein, when lead-free Bi0.9La0.1FeO3–Ba0.7Sr0.3TiO3–K0.5Na0.5NbO3 ceramics with a high disorder degree at the atomic scale was systematically explored, it exhibited an ultrahigh Wrec of 13.9 J cm−3 and high η of 89.6% due to the synergistic contribution of high maximum polarization Pmax, small remanent polarization Pr and large breakdown strength Eb. The high Pmax is generated because of the genes of BiFeO3, while the small Pr originates from the significantly enhanced relaxor behavior. In particular, the large Eb stems from multiple intrinsic and extrinsic factors, such as the decreased average grain size at the submicron scale and promoted electrical microstructure. Moreover, the ceramics displayed exceptional reliability and giant power density. These results not only demonstrate the great potential of BiFeO3-based dielectric ceramics in energy storage applications but also pave a feasible way to develop novel lead-free dielectric capacitors with extraordinary energy storage properties.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Ting Wang,S.-H. Song,Qing Ma,M.-L. Tan,J.-J. Chen
Multiferroic BiFeO 3 and Bi 1- x Sm x Fe 0.95 Nb 0.05 O 3 ceramics are successfully fabricated by spark plasma sintering combined with sol-gel powders. The effects of Sm and Nb co-doping on the structural, dielectric, ferroelectric and magnetic properties of the samples are investigated. With the Sm-Nb co-doping, the crystal structure of as-prepared samples transforms from R 3 c to Pnma and the grain size, loss tangent and leakage current density are reduced. The leakage current density of the co-doped samples can be reduced by approximately three orders of magnitude compared with the undoped sample. The dielectric, ferroelectric and magnetic properties are apparently enhanced due to the Sm-Nb co-doping. The optimal values of remanent polarization ( P r ) and magnetization ( M r ) of the created Bi 0.85 Sm 0.15 Fe 0.95 Nb 0.05 O 3 ceramic are approaching up to 5.853 μC/cm 2 and 0.187 emu/g, respectively. This enhancement of the multiferroic properties could be attributed to the co-doping-induced structural distortion, grain size reduction, oxygen vacancy decrease, space-modulated spin structure collapse as well as increased magnetic ions.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Chunxin Xu,Yi Wang,Wanjun Li,Dunfeng Gao,Guoxiong Wang,Rui Cai
Renewable energy-driven electrocatalytic CO2 reduction reaction (CO2RR) over bismuth-based catalysts shows great promise for converting CO2 into formic acid and formate while closing the carbon cycle. Herein, we report a high-performance BiFeO3/Bi25FeO40 precatalyst, which delivers a formate partial current density of 359.8 mA cm–2 and a formate formation rate of 6.71 mmol h–1 cm–2 in a flow cell at −0.75 V versus reversible hydrogen electrode (vs RHE). Furthermore, it shows stable formate production for 88 h at −0.64 V vs RHE with a total current density of 160 mA cm–2. The impressive electrocatalytic performance toward CO2RR to formate is likely ascribed to the synergistic effect of single Bi atoms and bimetallic BiFe nanoparticles present in close proximity after in situ electrochemical reconstruction of the BiFeO3/Bi25FeO40 precatalyst. This work presents new insights into the development of highly efficient Bi-based catalysts for the CO2RR.
研究领域:
化学
·
材料科学
·
电化学
·
可再生能源
·
催化
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Shuangjie Xu,Huan Zheng,Chongqi Wang,Kaifeng Li,Xinyue Xu,Hongmeng Zhang,Yanda Ji,Lei Qiu,Hao Yang
Real-time impact monitoring is essential to ensure the safe service and efficient operation of the aircraft structure. By embedding the piezoelectric sensor array within the structure and applying appropriate signal processing algorithms, the impact position can be precisely localized, enabling real-time monitoring of the aircraft structure. With the development of supersonic aircraft, the fuselage skin of the aircraft is often exposed to high temperatures and other harsh environments during flight. However, the relatively low operating temperature significantly limits the application of traditional piezoelectric sensor arrays in high-temperature impact monitoring. The Mn-doped BiFeO 3 -BaTiO 3 ceramics exhibit excellent piezoelectric properties and high Curie temperature ( T c ), making them promising for high-temperature impact monitoring of the supersonic aircraft. In the present work, we fabricated a sensor array based on 0.7BiFeO 3 -0.3BaTiO 3 -0.25 %molMnO 2 (73BFBT-Mn) ceramic, which demonstrates a T c of 478 °C and a piezoelectric charge constant ( d 33 ) of 125 pC/N at room temperature. Significantly, the 73BFBT-Mn ceramic sensor array maintains a good impact localization accuracy from 25 °C to 200 °C combined with the improved path imaging algorithm. This is attributed to the construction of virtual paths within the sensor array and the extraction of impact signal features, which represent the major improvement compared to traditional path imaging algorithms. The 73BFBT-Mn ceramic sensor array exhibits significant prospects for high-temperature impact monitoring, particularly in the monitoring of supersonic aircraft fuselage skins.
研究领域:
材料科学
·
航空工程
·
传感器与执行器
·
信号处理
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Jian Dai,Yucheng Zhu,Delong Dai,Wenfeng Yue,Zhenhao Fan,Fu Huang,Yuqun Deng,Atilla Evcin,Yangke Long,Dawei Wang,Yunfei Chang
Piezocatalysis promises sustainable water purification but remains constrained by ephemeral and nonselective radical pathways in complex aqueous environments. Herein, this study reports a defect-engineered BiFeO 3 piezocatalytic peroxymonosulfate activation system, which manifests efficient catalytic dynamics through dual nonradical oxidation pathways involving high-valent Fe(IV) = O species and piezo-induced holes. Experimental and theoretical analyses unveil a closed-loop Fe(II)/Fe(III)/Fe(IV) = O redox cycle sustained by the synergy of oxygen vacancy defects and piezoelectric polarization, enabling persistent nonradical oxidation. This system achieves over 99% bacterial inactivation within 30 min and unprecedented pollutant degradation rates (e.g., k = 0.174 min −1 for Sulfamethoxazole, 0.477 min −1 for Rhodamine B), outperforming state-of-the-art radical-based BiFeO 3 systems by 2−40 fold. The catalyst retains robust activity across broad pH ranges, anion-rich environments, and real water matrices. This work not only advances the mechanistic understanding of piezocatalysis beyond conventional radical pathways but also establishes a design framework for durable, efficient, and self-sustaining piezocatalytic systems for scalable water purification.
研究领域:
环境科学
·
材料科学
·
催化
·
水处理
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Xuan Liu,Yujie Yan,Feifei Guo,Liangliang Chang,Zengzhe Xi,Chunsheng Zhou
This study demonstrates a tripartite strategy to significantly enhance the piezo-photocatalytic degradation of ofloxacin (OFL) using modified BTO@BGFZ9 composite nanoparticles. Gd/Zr codoping optimizes the band structure and ferroelectricity of BFO, while heterojunction construction with BTO promotes interfacial charge separation. Corona poling treatment further aligns ferroelectric domains to amplify the piezoelectric field. The optimized 0.4BTO@BGFZ9 composite achieved 88.96% OFL degradation within 120 min under ultrasonic and visible-light synergy with a first-order rate constant of 0.0175 min–1. Mechanistic studies reveal that VO and a type-II heterojunction facilitate the generation of dominant reactive species (•O2– and h+), enabling efficient OFL mineralization via piperazine ring cleavage and defluorination.
研究领域:
材料科学
·
环境催化
·
纳米材料
·
压电材料
·
光催化
·
功能陶瓷
·
废水处理
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·Vol. 42
·期 6
·7328-7335
·
IF 2.758
Ting Wang,S.-H. Song,Meng Wang,J.-Q. Li,M. Ravi
Phase-pure BiFeO 3 powders were synthesized by sol–gel technique. Based on these powders, high-density BiFeO 3 ceramics were prepared by spark plasma sintering (SPS) at 700 °C along with annealing for 2 and 4 h, respectively, at 650 °C under atmospheres of air and oxygen. X-ray diffraction analysis revealed that the 4 h-oxygen-annealed sample contained a single rhombohedral perovskite phase while the samples annealed in the other conditions contained small quantities of impurity phases besides the rhombohedral perovskite phase. The relative density of the 4 h-oxygen-annealed sample was about 96%, being apparently higher than that of the other samples. In comparison with the 4 h-air-annealed sample, the dielectric constant of the 4 h-oxygen-annealed sample was relatively higher. The activation energy for electrical conduction was about 1.17 eV for the 4 h-oxygen-annealed sample while it was about 0.98 eV for the 4 h-air-annealed sample, showing that the former would have a lower room-temperature conductivity (~2.6×10 −14 S cm −1 ) than the latter (~2.1×10 −13 S cm −1 ). It is therefore anticipated that the oxygen-annealed sample could possess better ferroelectric properties as compared to the air-annealed sample.
研究领域:
材料科学
·
陶瓷
·
多铁性材料
·
固态物理
·
材料电学性能
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Ting Wang,Ting Xu,Shang Gao,S.-H. Song
BiFeO 3 , BiFe 0.95 Nb 0.05 O 3 and Bi 1− x Nd x Fe 0.95 Nb 0.05 O 3 ( x =0.0, 0.05, 0.10, 0.15 and 0.20) nanoparticles are successfully synthesized via a tartaric acid-assisted sol-gel technique for the first time. The effect of Nd and Nb co-doping on the structure, morphology, and magnetic and optical properties is investigated. X-ray diffraction (XRD) and Raman measurements demonstrate that Nd 3+ ions and Nb 5+ ions co-doping at A and B-sites of BiFeO 3 can result in a structural transformation (from single rhombohedral phase ( R 3 c ) to two coexisting phases ( R 3 c and Pbam)). The morphology of the nanoparticles seems to be approximately cubic, and by the co-doping, the size of the nanoparticles decreases from ~132 to ~35 nm. Notable improvement in the remanent magnetization of the sample with x =0.15 is observed with a value of 0.285 emu/g, being 20 times higher than that of the undoped sample (BiFeO 3 ). A decrease in the optical band gap is also observed in the Nd and Nb co-doped nanoparticles, indicating their favorable potential in photocatalytic applications.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Journal of Materiomics
·
2023
·
IF 9.4
Jianwei Zhao,Hailan Qin,Xiaoxin Chen,Shuhui Yu,Dawei Wang
A number of CaHfO 3 modified BiFeO 3 -0.33BaTiO 3 (BF-0.33BT- x CH) lead-free piezoceramics were fabricated through the solid-state sintering method and comprehensively investigated in this work. Under the optimal sintering temperature, all compositions display a typical perovskite structure in a pseudo-cubic phase with slightly larger lattice parameters as the CH content increases. The electrical resistivity is highly enhanced due to the addition of CH. Microstructures, including the grain morphology, core-shell structure, and chemistry inhomogeneities, are demonstrated upon different BF-0.33BT- x CH compositions. In particular, the core-shell structures with non-uniform element distributions in the compositions can be eliminated by adding sufficient CH content ( x > 0.05). The highest saturation polarization (40.1 μC/cm 2 ), remnant polarization (26.8 μC/cm 2 ), and converse piezoelectric coefficient (290 pm/V) are achieved in the BF-0.33BT-0.01CH piezoceramic, which are significantly enhanced in comparison with the undoped BF-0.33BT piezoceramic. With further increasing the CH content, the piezoelectric properties of BF-0.33BT- x CH ceramics decline rapidly, and they start to exhibit characteristics of relaxor ferroelectrics.
研究领域:
材料科学
·
陶瓷
·
压电材料
·
铁电材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）