JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 26
·1-14
·
IF 2.8
Li Chenglong,Si Jingxiang,Yuan Xiufang,Wang Wenxuan,Wang Guoguo,Lin Xiujuan,Huang Shifeng,Yang Changhong
With the development of new sensor technology, flexible piezoelectric materials possessing exceptional mechanical-to-electrical energy conversion capabilities hold great promise for application in a variety of sectors, including biomedicine, flexible robotics, and wearable electronic devices. This work reports the successful growth of an all-inorganic transparent Bi(Fe 0.95 Mn 0.05 )O 3 (BFOMn) film on the Mica substrate using a straightforward one-step sol–gel method. The prepared BFOMn thin film enables the optimum electrical properties with a saturated polarization of ~ 92 μC/cm 2 , a remanent polarization of ~ 74 μC/cm 2 , and a high piezoelectric constant d 33 of ~ 405 pm/V. Concurrently, the film exhibits exceptional adaptability without compromising its electrical performance, as evidenced by its capacity to undergo a tight curve with a radius of just 2 mm. Utilizing this BFOMn film, the fabricated flexible piezoelectric energy harvester (FPEH) has exceptional energy collecting capabilities, producing an output voltage of 15 V, a short current of 130 nA, and a notable force sensitivity of 4 V·N −1 before poling. It can also be employed to monitor human actions, such as hand hammering, hand clapping, and foot stepping. This work demonstrates the potential of the BiFeO 3 -based FPEH/sensor in the field of new intelligent electronics.
研究领域:
材料科学
·
纳米技术
·
能量转换
·
柔性电子学
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传感器技术
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 19
·6702-6709
·
IF 4.39
Qiuci Yu,Yuchi Zhang,Yan Xu
Metal oxide-based gas sensors have drawn tremendous research interests owing to their various compositions and selective and improved performance. However, the development of a targeted metal oxide with controlled microstructures via a facile preparation procedure is still a challenge. In this work, hierarchical BiFeO3 nano-microstructures are successfully developed through the post-modification of Bi3+ encapsulation with Fe-based Prussian blue microcubes followed by a sequential annealing strategy. The microstructures of the hierarchical BiFeO3 architectures can be effectively modulated by tuning various thermolysis temperatures. Among them, the hierarchical hollow BiFeO3 microcubes assembled from ultrathin nanosheets exhibit optimum acetone selective sensing performances with a gas response value (Ra/Rg) of 5.2 at 240 °C, rapid response/recovery times (10 s/9 s), and excellent long-term stability (for at least 30 days). The high and reproducible acetone-sensing properties are mainly attributed to the unique interior loose and porous structures with good permeability. The corresponding acetone sensing mechanism relying on the microstructure of BiFeO3 was also discussed. This work highlights the key role of morphological evolution in the fabrication of multi-functional multimetal oxides, and thus offers new opportunities for the rational design of novel gas sensing materials.
研究领域:
材料科学
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纳米技术
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气体传感
·
化学传感器
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
·
2024
·Vol. 42
·期 2
·
IF 2.4
Zia Layiq,Razia Eesha Tur,Hassnain Jaffari G.,Ismat Shah S.
Multiferroic (BiFeO 3 ) 1− x -(PbTiO 3 ) x (1− x )BF− x PT thin films exhibit very high electromechanical properties in the vicinity of the morphotropic phase boundary (MPB), making them important candidates for use in several modern device applications. However, preparing high-quality (1− x )BF− x PT thin films is challenging due to the high conductivity caused by oxygen vacancies produced during the synthesis process. This study aims to understand the effect of size and porosity density on the electrical properties of (1− x )BF− x PT thin films. A series of (1− x )BF− x PT solid solution thin films were fabricated using the spin-coating method on Pt/TiO 2 /SiO 2 /Si(100) substrates through chemical solution deposition. X-ray diffraction studies revealed a polycrystalline structure. Surface SEM images showed that the films have a uniform surface with average grain sizes ranging between 50 and 200 nm and an average film thickness of 1.5 μ m. A decrease in average pore size and an increase in the number of pores were observed with the increase in PT concentration in the prepared films. Ferroelectric characterization revealed that the films exhibit room-temperature ferroelectric hysteresis loops. Sources of various contributions to polarization were extracted from hysteresis loops, including true ferroelectric switching and space charge contributions. Thin films with 0.30 < x < 0.45 show higher remanent and saturation polarization values, suggesting that these compositions exhibit the MPB. The highest remanent polarization value ( P R = 16.68 μ C/cm 2 ) was observed for the thin film with x = 0.40. The correlation between the phase, composition, film morphology, and ferroelectric response is described and discussed.
研究领域:
材料科学
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固体物理
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电陶瓷
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纳米技术
✓ 已验证
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2017
·
IF 7.78
Qian Zhou,Youxiu Lin,Kangyao Zhang,Meijin Li,Dianping Tang
A novel magnetic controlled photoelectrochemical (PEC) sensing system was designed for sensitive detection of prostate-specific antigen (PSA) using reduced graphene oxide-functionalized BiFeO 3 (rGO-BiFeO 3 ) as the photoactive material and target-triggered hybridization chain reaction (HCR) for signal amplification . Remarkably enhanced PEC performance could be obtained by using rGO-BiFeO 3 as the photoelectrode material due to its accelerated charge transfer and improved the visible light absorption. Additionally, efficient and simple operation could be achieved by introducing magnetic controlled flow-through device. The assay mainly involved in anchor DNA-conjugated magnetic bead (MB-aDNA), PSA aptamer/trigger DNA (Apt-tDNA) and two glucose oxidase-labeled hairpins (H1-GOx and H2-GOx). Upon addition of target PSA, the analyte initially reacted with the aptamer to release the trigger DNA , which partially hybridized with the anchor DNA on the MB. Thereafter, the unpaired trigger DNA on the MB opened the hairpin DNA structures in sequence and propagated a chain reaction of hybridization events between two alternating hairpins to form a long nicked double-helix with numerous GOx enzymes on it. Subsequently, the enzymatic product (H 2 O 2 ) generated and consumed the photo-excited electrons from rGO-BiFeO 3 under visible light irradiation to enhance the photocurrent . Under optimal conditions, the magnetic controlled PEC sensing system exhibited good photocurrent responses toward target PSA within the linear range of 0.001 − 100 ng/mL with a detection limit of 0.31 pg/mL. Moreover, favorable selectivity, good stability and satisfactory accuracy were obtained. The excellent analytical performance suggested that the rGO-BiFeO 3 -based PEC sensing platform could be a promising tool for sensitive, efficient and low cost detection of PSA in disease diagnostics.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Xin Xu,Shang Wu,Xin Sun,Shuo Tian,Chaoyang Liu,Penghui Zhang,Shuaishuai Fu,Yanbin Wang,Qiong Su,Xia Wang,Quanlu Yang
The rectangular nanorods microstructure with abundant pores can reduce structural damage caused by the volume contraction during charging-discharging processes and enhance the specific capacitance. In this work, to enhance the energy density and accelerate the marketable applications of supercapacitors , Bi 2 O 3 /BiFeO 3 rectangular nanorods with rich mesoporous structure derived from the iron‑bismuth based Prussian blue analogue are rationally designed to achieve a large specific capacitance through precipitation and annealing measures. There are a huge specific capacity of 741 F g −1 and long cycle life. The NiCo-LDH/rGO (954 F g −1 ) demonstrated an impressive stability of 86 % after 10,000 cycles and is utilized to establish asymmetric supercapacitor device. Amazingly, the NiCo-LDH/rGO//Bi 2 O 3 /BiFeO 3 device achieves an enormous energy density of 59.7 Wh kg −1 at 800 W kg −1 . In addition, the capacity retention ratio is 79.3 % after 7000 cycles. The work has suggested that Bi 2 O 3 /BiFeO 3 has great potential as a negative electrode of supercapacitors.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2011
·Vol. 21
·期 46
·18645-18652
·
IF 5.101
Renqing Guo,Liang Fang,Wen Dong,Fengang Zheng,Mingrong Shen
A facile sol–gel approach with a fixed calcination temperature is developed to prepare BiFeO3 (BFO) nanoparticles, and the gel-drying temperature is adjusted to control the appearance of a γ-Fe2O3 parasitic phase. The room temperature ferromagnetism of the samples is strongly dependent on the gel-drying temperature. When the gel-drying temperature increases from 80 to 140 °C, the saturated magnetization of the corresponding samples jumps from 0.22 emu g−1 to 1.2 emu g−1, allowing the nanoparticles to be magnetically separated in solution. From examination by transmission electron microscopy and X-ray photoelectron spectroscopy, it is confirmed that the γ-Fe2O3 parasitic phase is nucleated during the gel-drying process under high temperatures above 120 °C, and remains in the subsequent annealing process, resulting in the anomalous enhanced magnetization. Comparing with pure BFO nanoparticles prepared under low gel-drying temperature, the BFO/γ-Fe2O3 samples exhibit significantly increased visible-light photocatalytic ability towards rhodamine B. The formation of a heterojunction structure between the BFO and γ-Fe2O3 phases is proposed to be responsible for the enhanced photocatalytic activity. Further enhanced photocatalytic activity is obtained in this study when adding a small amount of H2O2 during photocatalysis, indicating the samples have photo-Fenton-like catalytic activity.
研究领域:
材料科学
·
纳米化学
·
光催化
·
功能材料
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环境催化
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磁性材料
·
能源材料
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Zhaoyang Li,Yongshuai Xie,Yifan Wang,Ying Peng,Zhezhe Deng,Benxue Liu,Guanghui Zhang,Xinqiang Wang,Fengqing Zhang,Luyi Zhu
In this paper, we conducted a study on the structural modulation and photocatalytic performance of single-phase hollow BiFeO 3 nanofibers (SPH–BFO NFs) photocatalysts , investigated the effect of heat treatment temperature on the structure of BFO NFs and the formation mechanism of a hollow structure. The SPH-BFO NFs consist of BiFeO 3 nanocrystals without other heterogeneous phases, with diameters of 400–600 nm and extraordinary flexibility, allowing easy separation of the catalyst from the solution. As a result, the SPH-BFO NFs possess outstanding photocatalytic performance and higher photocatalytic efficiency compared with other forms of BiFeO 3 . In addition, the effects of different environments and water quality on RhB degradation were investigated. It was found that the vacancies (h + ) and superoxide radicals (·O 2 − ) as active substances were less environment-dependent, making the SPH-BFO NFs more resistant to environmental interference. The RhB degradation efficiency of BFO NFs was about 99% in 10 mg/L of RhB dye solution at pH = 6. This work provides valuable insights into the application of SPH-BFO NFs in photocatalysis and the design of nanofiber photocatalysts.
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
JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Tianrui Xu,Guanghui Wang,Zehua Liu,Nansheng Deng,Xuewen Zhang
A green, efficient and recyclable magnetic BiFeO 3 /Cl-g-C 3 N 4 photocatalyst was prepared for the simultaneous removal of Cr(Ⅵ) and tetracycline (TC) from water by wet chemical and thermal synthesis methods. Experimental results revealed that BiFeO 3 /Cl-g-C 3 N 4 achieved a removal efficiency of 96.1 % for Cr(Ⅵ) and 98.2 % for TC under visible light irradiation for 50 min at pH 6. The results of the work function, charge density difference, UV–vis DRS, PL, PC and EIS tests indicate the formation of S-scheme heterojunctions between BiFeO 3 and Cl-g-C 3 N 4 , which exhibits superior carrier separation and migration efficiency. The evidence for interfacial charge transfer from BiFeO 3 to Cl-g-C 3 N 4 within BiFeO 3 /Cl-g-C 3 N 4 was further corroborated by means of ISIXPS, EPR and KPFM. Moreover, calculations of the density of states demonstrate that the introduction of Cl enhances the reduction capability of BiFeO 3 /Cl-g-C 3 N 4 . Results from ESR tests and trapping experiments has demonstrated that the singlet oxygen ( 1 O 2 ) and electrons are the primary active species. Furthermore, the high removal rates of TC and Cr(VI) from industrial wastewater and groundwater, coupled with the lower ecotoxicity of TC degradation intermediates, indicate that BiFeO 3 /Cl-g-C 3 N 4 has the potential for practical applications. After five cycles, the BiFeO 3 /Cl-g-C 3 N 4 still removed 90.5 % of TC and 96 % of Cr(Ⅵ).
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 Environmental Chemical Engineering
·
2022
·
IF 7.968
Yinghua Li,Wenyue Yin,Mengxi Li,Jingwen Zhang,Lijun Chen
Ag/AgCl/Bi 2 O 3 /BiFeO 3 composite photocatalysts were synthesized by a simple co-precipitation and sono-chemical method, and their photocatalytic properties were investigated. The crystal structure, morphology, and elemental composition of the Ag/AgCl/Bi 2 O 3 /BiFeO 3 composite photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy-energy spectroscopy (SEM-EDS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS). Carrier migration and separation studied by Uv–vis DRS and PL spectroscopy. XPS showed that Ag monomers were successfully reduced out. The photocatalytic activity of the composites was investigated by simulating sunlight (full-spectrum xenon lamp irradiation) irradiation of levofloxacin hydrochloride. The results showed that the composite photocatalyst had the highest photocatalytic activity at pH 8 of the prepared system, pH 7 of the reaction solution and Ag + concentration of 0.1 mol/L (44.3 wt% loading), and still had good photocatalytic activity after five cycles. Compared with Bi 2 O 3 /BiFeO 3 and Ag/AgCl, Ag/AgCl/Bi 2 O 3 /BiFeO 3 exhibited better photocatalytic activity. In addition, based on the radical scavenging experiments and electron spin resonance analysis, ·O 2 - , h + and ∙OH were the reactive groups that played a role in the reaction system, and a possible catalytic mechanism of Ag/AgCl/Bi 2 O 3 /BiFeO 3 was proposed.
研究领域:
材料科学
·
环境化学
·
光化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xiufen Yang,Runzhi Han,LiWei Shi,YiXin Li,Changyong Lan,Leiming Chen,Chuanfu Huang
To address the persistent challenges of wide band gap (2.13 eV), high carrier recombination rates, and poor cycling stability in bismuth ferrite (BiFeO 3 BFO)-based photocatalysts, this study introduces an unprecedented La³⁺/Ti⁴⁺ dual-site doping strategy. La/Ti co-doped BFO nanoparticles (n% BLFTO) were synthesized using a sol-gel method. The synergistic effects of La³⁺-induced gradient oxygen vacancies (increased by 270%) and Ti³⁺/Ti⁴⁺ redox couples led to a significant band gap narrowing to 1.79 eV, extending visible light absorption to 450-700 nm. Remarkably, the optimized 30% BLFTO sample achieved a 98.9% degradation efficiency of Rhodamine B (Rh B) within 120 minutes-7.17% higher than pure BFO and maintained 95.92% efficiency after 12 cycles (2.98% decay), demonstrating exceptional stability rarely reported in prior works. In-situ X-ray Photoelectron Spectroscopy and Photoluminescence Spectroscopy analyses revealed that dual-doping synergistically modulates carrier dynamics via Fe²⁺/Fe³⁺ mixed valency and abundant oxygen vacancies, thereby prolonging carrier lifetimes and enhancing photocatalytic activity. This work pioneers a dual-doping framework that simultaneously enables highly efficient visible-light-driven degradation of Rh B and exceptional cycling stability, offering new insights for the design of robust photocatalysts for environmental remediation and renewable energy applications.
研究领域:
材料科学
·
环境科学
·
光催化
·
纳米技术
·
固态化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Huan He,Qingsong Yue,Qicheng Ma,Xiaoxia Yang,Juhong Zhan,Feng Liu,Zhicheng Liao,Ziwei Guo,Bin Huang,Xuejun Pan
The reuse of reclaimed water has been limited by the ecological and human health risks of the residual trace organic pollutants , antibiotic-resistant bacteria and antibiotic resistance genes it often contains. The emerging photoelectrocatalytic technology may be able to break through this bottleneck. Nevertheless, the detailed information about such technology in the reclaiming water treatment has not been fully addressed. A laboratory-scale photoelectrocatalytic purification system was constructed using TiO 2 nanotube arrays doped with BiFeO 3 nanoparticles as the anode and carbon/polytetra-fluoroethylene as the cathode. The anode was stable with excellent optical and electrochemical properties. About 5.6 log of antibiotic-resistant bacteria were inactivated within 30 min, and 60% of free antibiotic resistance genes were removed within 60 min. The effective removal was mainly due to mutual promotion between photoelectrocatalysis and Fenton reactions which produced abundant active radicals. Low concentrations of effluent organic matter promoted the inactivation. The process was demonstrated in a bench-scale reactor treating 17α-ethinylestradiol and antibiotic-resistant bacteria with high removal rates. The designed photoelectrocatalytic reactor can provide efficient technology for the reuse of reclaiming water.
研究领域:
环境工程
·
水处理
·
光电催化
·
废水回用
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Ping Su,Dong Zhang,Xintong Yao,Tengteng Liang,Nan Yang,Dafeng Zhang,Xipeng Pu,Junchang Liu,Peiqing Cai,Zhengping Li
An emerging approach that employs both light and vibration energy on binary photo-/piezoelectric semiconductor materials for efficient hydrogen (H 2 ) evolution has garnered considerable attention. ZnIn 2 S 4 (ZIS) is recognized as a promising visible-light-activated photocatalyst. However, its effectiveness is constraint by the slow separation dynamics of photoexcited carriers. Density functional theory (DFT) predictions have shown that the integration of piezoelectric BiFeO 3 (BFO) is conducive to the reduction of the H 2 adsorption free energy (ΔG H* ) for the photocatalytic H 2 evolution reaction, thereby enhancing the reaction kinetics. Informed by theoretical predictions, piezoelectric BFO polyhedron particles were successfully synthesized and incorporated with ZIS nanoflowers to create a ZIS/BFO heterojunction using an ultrasonic-assisted calcination method. When subjected to simultaneous ultrasonic treatment and visible-light irradiation, the optimal ZIS/BFO piezoelectric enhanced (piezo-enhanced) heterojunction exhibited a piezoelectric photocatalytic (piezo-photocatalytic) H 2 evolution rate approximately 6.6 times higher than that of pristine ZIS and about 3.0 times greater than the rate achieved under light-only conditions. Moreover, based on theoretical predictions and experimental results, a plausible mechanism and charge transfer route for the enhancement of piezo-photocatalytic performance were studied by the subsequent piezoelectric force microscopy (PFM) measurements and DFT calculations. The findings of this study strongly confirm that both the internal electric field of the step-scheme (S-Scheme) heterojunction and the alternating piezoelectric field generated by the vibration of BFO can enhance the transportation and separation of electron-hole pairs. This study presents a concept for the multipath utilization of light and vibrational energy to harness renewable energy from the environment.
研究领域:
材料科学
·
催化
·
可再生能源
·
纳米技术
·
光化学
·
压电学
✓ 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）