CERAMICS INTERNATIONAL
·
2026
·
IF 6
Jinpeng Zhao,Zi'ang Liu,Suo Fu,Fazheng Wei,Xiaowei Chen,Danqing Liu,Weicheng Huang,Shaoqin Liu
A Sm/Co dual-doping strategy is introduced to the A and B sites of BiFeO 3 (BFO) perovskite structure to boost the synergetic piezo-photocatalytic performance for organic pollutant degradation and hydrogen production. The optimized doping ratio enables it to achieve the best balance between carrier concentration and piezoelectric response while regulating the energy band. The dual-doped sample Bi 0.9 Sm 0.1 Fe 0.8 Co 0.2 O 3 (BS 0.1 FC 0.2 O) exhibits the best piezo-photocatalytic performance, achieving a 90% RhB degradation efficiency in 60 min and hydrogen production rate of 1525 μmol g −1 h −1 . The coupling of Sm and Co co-doping in BFO effectively enhances the light harvesting and the piezoelectric polarization performance, which facilitate the generation and separation of electrons and holes. This work provides a paradigm for designing efficient piezo-photocatalysts with tailored band structures through bimetal co-doping strategies and demonstrates great potential for applications in environmental remediation and hydrogen production.
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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.
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Journal of Environmental Chemical Engineering
·
2020
·
IF 4.3
Tao Huang,Jundong Zhu,Shengzhuo Ge,Tianyu Guo,Chongwen Jiang,Le Xie
Heterogeneous photo-Fenton reaction using BiFeO 3 as catalyst was considered as an efficient environmental remediation technique. However, its low catalytic performance limited its application. In this work, CdSe QDs with high electron mobility, small size effect and rich surface properties were loaded on BFO surface by stirring impregnation method. The photo-Fenton catalytic performance of catalysts under visible light irradiation was evaluated by the degradation of phenol. The results showed that the BFO with CdSe QDs uniformly distributed on the surface shows much better photo-Fenton degradation of phenol performance than that of pure BFO. Moreover, when the load content of CdSe QDs comes to 0.5 wt%, the degradation efficiency of phenol increased from 41.5% to 98.5% within 60 min. The results of photochemical experiments confirmed that composite catalyst had a good ability to separate photo-induced carriers and the experiments of free radicals trapping showed that the holes and OH radicals were important active substances. Based on the above research, the possible mechanism of photo-Fenton reaction of catalyst was expounded. Excellent photo-Fenton catalytic performance and superior stability make this material showing a good application prospect for the degradation of organic pollutants in wastewater.
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ACS Omega
·
2026
·
IF 5.2
Xuan Liu,Liangliang Chang,Aiguo He,Zengzhe Xi,Chunsheng Zhou,Baoyue Cao
The persistence of fluoroquinolone antibiotics like OFL in aquatic environments poses a significant ecological and public health risk due to their poor biodegradability and potential to induce antibiotic resistance. This study reports the fabrication of free-standing, flexible nanofibrous films via electrospinning, incorporating optimal BGFZ9 nanoparticles into a P(VDF-HFP) matrix (denoted as P(VDF-HFP)@BGFZ9). Comprehensive characterization reveals that the BGFZ9 nanoparticles act as effective heterogeneous nucleating agents, significantly promoting the formation of piezoelectric β-phase in P(VDF-HFP) and enhancing the ferroelectric polarization of the composite through interfacial coupling. Under ultrasonic excitation, the composite film exhibits remarkable piezocatalytic performance for OFL degradation, following pseudo-first-order kinetics. The film with an optimal 10% BGFZ9 loading achieves a reaction rate constant of 0.684 min–1·g–1 under piezocatalysis, which is approximately 1.22 times higher than that of the pure polymer film. A synergistic piezophotocatalytic effect is observed under combined ultrasonic and light irradiation, leading to an OFL removal efficiency of 85.71% within 3 h and a further increased rate constant of 1.043 min–1·g–1. Radical scavenger experiments and EPR spectroscopy identify superoxide radicals •O2– and h+ as the primary reactive species responsible for the degradation. The composite film demonstrates excellent cycling stability, retaining 94.4% of its initial activity after five consecutive runs, alongside robust structural integrity. This work provides a novel strategy for developing efficient, stable, and easily recyclable flexible piezocatalytic materials for antibiotic wastewater remediation.
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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.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Wenbao Huang,Houfen Li,Zhiyi Dang,Shibo Xu,Rong Han,Rui Li,Aijuan Zhou,Xiuping Yue,Xu Zhao,Jiancheng Wang
Persulfate-assisted visible-light photocatalysis shows promise for refractory organic pollutant degradation but is limited by low charge separation/utilization in conventional catalysts. Leveraging the unique charge-separation capability of Schottky junctions and the tunable surface charge properties of ferroelectric materials, this study innovatively constructs a polarized BiFeO 3 -Ag (BFOA*) Schottky junction catalyst to drive the synergistic persulfate (PS)/visible-light (VIS) catalytic degradation of quinoline. Comprehensive characterization confirms the formation of the BiFeO 3 -Ag Schottky junction. Pronounced hysteresis loops and distinct domain structures observed via piezo-response force microscopy (PFM) demonstrate that corona poling induces a stable built-in ferroelectric polarization field. In the VIS/PS/BFOA* system, the polarized catalyst achieves 98.8 ± 1.1% quinoline degradation within 90 min, significantly outperforming its unpolarized counterpart (88.1 ± 4.0%), while maintaining excellent cycling stability and markedly reduced effluent toxicity. Mechanistic investigations and DFT calculations reveal that ferroelectric polarization facilitates directional electron migration through the Schottky junction, while the Schottky barrier suppresses the backflow of the photogenerated electrons, thereby synergistically improving charge carrier separation. Simultaneously, ferroelectric polarization–induced charged surface sites promote the adsorption and activation of PS. This dual function results in abundant reactive species (h + , ·O 2 − , SO 4 · − , ·OH), which are responsible for the efficient quinoline degradation. This work highlights ferroelectric polarization engineering as a pivotal strategy for strengthening Schottky junction catalysts and establishes it a viable approach for designing sustainable advanced oxidation processes in wastewater treatment. Download: Download high-res image (193KB) Download: Download full-size image
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Materials
·
2025
·Vol. 18
·期 13
·2953
·
IF 3.2
Nanxi Lin,Hong Zhang,Yunye Shi,Chenjun Xu,Zhuoqian Xie,Yunjin Chen
The poor magnetic and magneto-optical properties of BiFeO3, along with its significant lattice mismatch with silicon, have limited its application in silicon-based integrated magneto-optical devices. In this study, co-doping with Sr2+and Ti4+ions effectively transformed the trigonal structure of BiFeO3into a cubic phase, thereby reducing the lattice mismatch with silicon to 2.8%. High-quality, highly oriented, silicon-based cubic Sr,Ti:BiFeO3thin films were successfully fabricated using radio frequency magnetron sputtering. Due to the induced lattice distortion, the characteristic periodic spiral spin antiferromagnetic structure of BiFeO3was suppressed, resulting in a significant enhancement of the saturation magnetization of cubic Bi0.5Sr0.5Fe0.5Ti0.5O3(48.0 emu/cm3), compared to that of pristine BiFeO3(5.0 emu/cm3). Furthermore, the incorporation of Sr2+and Ti4+ions eliminated the birefringence effect inherent in trigonal BiFeO3, thereby inducing a pronounced magneto-optical effect in the cubic Sr,Ti:BiFeO3thin film. The magnetic circular dichroic ellipticity (ψF) of Bi0.5Sr0.5Fe0.5Ti0.5O3reached an impressive 2300 degrees/cm.
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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
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材料科学
·
环境科学
·
纳米技术
·
物理化学
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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
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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.
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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
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电子器件
·
陶瓷与介电材料
·
储能技术
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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
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