Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 43
·15552-15565
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IF 7.393
Menghan Xu,Tao Wu,Yiheng Song,Ming Jiang,Zhuqun Shi,Chuanxi Xiong,Quanling Yang
As good alternatives to conventional rigid piezoelectric materials, environment-friendly biomass-based piezoelectric nanocomposites comprising piezoelectric ceramic fillers and a natural polymer matrix are highly desirable for flexible piezoelectric nanogenerators (PENGs) with high output performance. In this work, composite piezoelectric films were successfully prepared through uniform assembly of MoS2 nanosheets and tetragonal BaTiO3 nanoparticles in a 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofibril (TOCN) matrix using a facile, cost-effective and scalable method. The TOCN/MoS2/BaTiO3 ternary composite film demonstrated excellent mechanical properties with the highest tensile strength of 335 MPa and outstanding piezoelectric properties with the maximum longitudinal piezoelectric constant (d33) of 45 pC N−1 much higher than that of other cellulose-based piezoelectric materials. Benefiting from the prominent performance of the flexible cellulose-based nanocomposite, the resulting flexible TOCN/MoS2/BaTiO3 composite film-based PENG exhibited very high and stable output piezoelectric signals: namely, a maximum open-circuit voltage of 8.2 V and a maximum short-circuit current of 0.48 μA. Furthermore, the electricity generated by the PENG illuminated a LED directly or charged a 10 μF capacitor up to 3.1 V at 110 s. With high flexibility and sensitivity, the innovative device can work not only as a self-powered motion sensor to detect tiny forces in the environment and in human motion, but also as an electronic skin with good pyroelectric properties to monitor the temperature. Thus, this research provides new insights into the design and preparation of lightweight and simple-structure PENGs with high flexibility and remarkable piezoelectric performance, presenting great potential in the development of efficient mechanical energy harvesters, active sensor networks and wearable electronics.
研究领域:
材料科学
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能源技术
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传感器技术
✓ 已验证
产品关联
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
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电子工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Dan Xu,Jiale Wei,Taolin Yu,Fujia Ben,Xinyuan Zhou,Wenping Cao,Wenjie Zhao
The BaTi 1- x (Ni 0.5 Zn 0.5 ) x O 3 ( x = 0–0.10) ceramics are prepared by conventional sintering strategy. With increasing Ni/Zn co-doping, a continuous phase transition between BaTiO 3 (BT) polymorphs is demonstrated in this work. The phase composition evolution of orthorhombic(O)/tetragonal(T)-T/cubic(C)/hexagonal(H)-H phase can be observed in Ni/Zn co-doped BT ceramics. Owing to the successive transition of this phase structure, the micro morphology is modulated from normal circular grains to elongated morphology structure. Meanwhile, the strong ferroelectricity of the pure BT with O/T symmetry is gradually suppressed, and eventually disappears in the high-concentration Ni/Zn co-doped BT ceramics ( x = 0.08, 0.10) with H symmetry. The oxygen vacancy defects induced by Ni/Zn acceptor doping at local Ti-sites are responsible for the continuous phase transformation. To maintain charge balance, A-site Ba vacancy and the reduction of Ti 4+ to Ti 3+ is generated and hence, the polar displacement of Ti-O ions is restrained in multiphase coexistence samples. For the low Ni/Zn content of x = 0.02, the broadened phase transition region is advantageous for energy storage application. The energy storage density ( W rec ) of the x = 0.02 sample is 0.49 J/cm 3 and corresponding energy efficiency ( η ) is 85 % at 140 kV/cm. The variation in electrical properties is closely associated with phase structure evolution and defects/defect dipoles caused by Ni/Zn co-doping. Our work is instructive for the design and engineering the phase composition and morphology structure of BT-based ceramics.
研究领域:
材料科学
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无机非金属材料
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功能陶瓷
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Tiantian Yang,Zibo Dong,Inaam Ullah,Ayesha Irfan,Jun He,Jinhe Qi,Mai Li
Efficient interfacial carrier transfer and separation can effectively enhance the photocatalytic performance. Herein, a high-performance g-C 3 N 4 /Ag/BaTiO 3 heterostructure was constructed, which showed promising results in photocatalytic nitrogen fixation and tetracycline degradation. Specifically, Ag-modified tetragonal barium titanate (BaTiO 3 ) nanoparticles were combined with flower-like spherical graphitic carbon nitride (g-C 3 N 4 ) to prepare the g-C 3 N 4 /Ag/BaTiO 3 photocatalyst. The Ag nanoparticles were uniformly distributed on BaTiO 3 through photodeposition, which was subsequently loaded onto g-C 3 N 4 , offering abundant surface active sites and a large surface area for enhanced photocatalytic activity. Four types of composite photocatalysts were prepared. The 1:3-g-C 3 N 4 /Ag/BaTiO 3 photocatalytic composite, composed of g-C 3 N 4 and Ag/BaTiO 3 in a 1:3 ratio, achieved an impressive nitrogen fixation rate of 765.85 μmol g −1 h −1 , greatly exceeding that of pure g-C 3 N 4 and BaTiO 3 by factors of 2.14 and 3.88, respectively. Also 1:3-g-C 3 N 4 /Ag/BaTiO 3 had the highest tetracycline degradation rate of 82.7 %. It was found that the significant improvement of photocatalytic efficiency could be attributed to the ultrasonic vibration-induced piezoelectric polarization of BaTiO 3 , which generates an intrapolar electric field. Additionally, the noble metal Ag nanoparticles with surface plasmon resonance (SPR) effect can be used as electronic mediators to promote charge separation and transfer to form all-solid Z-type heterojunctions. This Z-type heterojunction effectively minimizes the recombination of photogenerated charge carriers of electrons and holes. Studies have shown that this composite photocatalyst exhibits excellent performance in both photocatalytic nitrogen fixation and the degradation of organic pollutants, highlighting the great potential of this composite heterojunction in photocatalysis.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2019
·
IF 3.771
Dan Yang,Yufeng Ni,Yingjie Xu,Xinxin Kong,Yancong Feng,Liqun Zhang
In this study, a highly efficient and cost-effective approach was developed to improve the electromechanical properties of nitrile-butadiene rubber (NBR). BaTiO 3 (BT) nanoparticles were firstly co-deposited with poly(catechol/polyamine) (PCPA) then grafted with γ-methacryloxypropyl trimethoxy silane (KH570) to form BT-PCPA-KH570 core-shell nanoparticles. The C C in KH570 participated in vulcanization with NBR rubber during crosslinking process to yield improved dispersions and interfacial interactions. This, in turn, enhanced the dielectric and electromechanical properties, as well as the dielectric strengths. The 50 phr BT-PCPA-KH570/NBR composites exhibited an actuated strain of 21.9%, which was ~4.36-folds higher than that of pure NBR (5.0%). Overall, the proposed modification route looks promising in industry for other dielectric fillers based high-performance dielectric elastomers .
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2015
·
IF 3.368
Nan Jia,Qian Xing,Xu Liu,Jing Sun,Guangmei Xia,Wei Huang,Rui Song
Poly(vinylidene fluoride) (PVDF) is a semi-crystalline polymer and the polar β -phase of PVDF shows superb electroactive properties. In order to enhance the β -phase of PVDF, extreme low content of BaTiO 3 nanoparticles (BT-NPs) coated with polydopamine (Pdop) were incorporated into PVDF matrix by solution casting. The β -phase of the resulting PVDF nanocomposites film was dramatically increased and the d 33 value reached 34.3 ± 0.4 pCN −1 . It is found that the Pdop layer could improve the dispersibility and stability of the BT NPs in solution and endow the BT NPs good dispersity in the PVDF matrix. Moreover, the interfacial interaction between PVDF chains and the surface of BT-Pdop nanoparticles (BT-Pdop NPs) were revealed, in which the CF 2 groups on PVDF could interact with the electron-rich plane of aromatic ring of Pdop moiety. This interaction, led to the increase of the crystallization activation energy as derived from the DSC nonisothermal crystallization measurement. The α – β crystal transformation, organization of interfacial interactions as well as the prevention of agglomeration of BT-NPs confer the improvement of mechanical and thermal properties of PVDF, such as toughness, tensile strength , elongation at break, and thermal conductivity .
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Baolai Wang,Kaili Wei,Fuming Chen,Yinzhen Wang,Guannan He,Wei Li,Junming Liu,Qinyu He
It has been found it more difficult in completely degrading A-ring of tetracycline (TC) than completely degrading B-D rings of tetracycline. Thus, it is very necessary to find an effective route to completely degrading A-ring of tetracycline. In this work, a Z-scheme heterojuncted core-shell La(OH) 3 @BaTiO 3 composite (LB) was designed and fabricated through hydrothermal method . Many characterization techniques were employed to investigate the microstructure, phases, composition, energy band structure , and the lifetime of photogenerated carriers. In the mean time, the photocatalytic properties, including the degradation of A-ring and B-D rings of TC, as well as active species during photo-degradation were investigated. It is found that the as-prepared LB has an improved lifetime of photo-produced carriers, as well as high photocatalytic properties, being attributed to the core-shell structured heterojunction La(OH) 3 @BaTiO 3 . In addition, it is also found that ·O 2 − is more effective on degrading A-ring of TC than other active species, likely owed to the PKa3 value (3.3) of A-ring in TC. This work has supplied a route to completely degrading the A-ring of TC: rationally design and prepare a Z-scheme heterojuncted composites which supply very negative conduction band bottom potential.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Zaitian Wang,Xuan Li,Fei Sun,Kaining Zhang,Fei Long,Tong Zhou,Lei Liu
Flexible piezoelectric films represent a groundbreaking advancement for wearable energy harvesting and bioelectronics, where mechanical adaptability and efficient electromechanical conversion are equally crucial. However, the persistent incompatibility between high piezoelectric coefficients and structural pliability creates a critical performance ceiling that undermines device reliability in dynamic operating environments. Here, we report an in situ interface engineering strategy to fabricate high-performance flexible piezoelectric films directly on Ti foils through combining hydrothermal synthesis of BaTiO 3 films with infiltration of P(VDF-TrFE). The flexible P(VDF-TrFE)/BaTiO 3 film with spatially interlocked heterostructure exhibits an excellent piezoelectric coefficient d 33 of ~264 pC N −1 , representing an enhanced remnant polarization of 21.4 μC cm −2 and a reduced coercive field of 220 kV cm −1 . The as-prepared piezoelectric film assembled on the Ti foil substrates demonstrates long-lasting flexibility, retaining an output voltage of about 5 V after 5000 bending cycles. The exceptional performance originates from the improved polarization through the stabilized BTO nanodomain synthesized by the in situ hydrothermal process. Furthermore, the spatially interlocked architecture redistributes polarized charges, thereby mitigating polarization degradation induced by microscale defects. This study pioneers a new paradigm for developing high-performance flexible piezoelectric film, and the scalable process can be potentially applied to wearable applications.
研究领域:
材料科学
·
纳米技术
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能源采集
·
生物电子学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Zhongbin Pan,Lingmin Yao,Jiwei Zhai,Dezhou Fu,Bo Shen,Haitao Wang
Flexible electrostatic capacitors are potentially applicable in modern electrical and electric power systems. In this study, flexible nanocomposites containing newly structured one-dimensional (1D) BaTiO3@Al2O3 nanofibers (BT@AO NFs) and the ferroelectric polymer poly(vinylidene fluoride) (PVDF) matrix were prepared and systematically studied. The 1D BT@AO NFs, where BaTiO3 nanoparticles (BT NPs) were embedded and homogeneously dispersed into the AO nanofibers, were successfully synthesized via an improved electrospinning technique. The additional AO layer, which has moderating dielectric constant, was introduced between BT NPs and PVDF matrixes. To improve the compatibility and distributional homogeneity of the nanofiller/matrix, dopamine was coated onto the nanofiller. The results show that the energy density due to high dielectric polarization is about 10.58 J cm–3 at 420 MV m–1 and the fast charge–discharge time is 0.126 μs of 3.6 vol % BT@AO-DA NFs/PVDF nanocomposite. A finite element simulation of the electric-field and electric current density distribution revealed that the novel-structured 1D BT@AO-DA NFs significantly improved the dielectric performance of the nanocomposites. The large extractable energy density and high dielectric breakdown strength suggest the potential applications of the BT@AO-DA NFs/PVDF nanocomposite films in electrostatic capacitors and embedded devices.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jin Hu,Yang Liu,Shufen Zhang,Bingtao Tang
Core–shell nanofillers designed for dielectric nanocomposites are expected to integrate high relative permittivity ( ε r ) and breakdown strength ( E b ). However, conventional core–shell nanofillers exhibit two major drawbacks: (i) the low- ε r shell greatly limits the ε r of the entire nanofiller, and (ii) the differences of calcination performance and lattice constant between the core and shell materials induce extra imperfections, which can cause premature breakdown. As a result, significantly enhancing the discharge energy density ( U d ) at low filling content is difficult. Herein, core–shell nanofibers constituted by single element-doped BaTiO 3 are prepared as fillers. They integrate relatively high ε r and E b , helping to obtain high- U d dielectric nanocomposites. The single-layer nanocomposite films with 2 wt% polydopamine-modified BZT15@BZT35 nanofibers (BZT15@BZT35@PDA_nfs) show 64% enhancement of U d compared with pristine poly (vinylidene fluoride) (PVDF) matrix. The sandwich nanocomposite films (PVDF/BZT15@BZT35@PDA_nf/PVDF/PVDF) with 2 wt% nanofibers in the middle layer achieve approximately 100% enhancement. The proposed nanofiller design strategy can be easily realized by coaxial electrospinning and further developed by tri-axial electrospinning and other multi-nozzle electrospinning methods. This study provides valuable insights into developing high-energy–density polymer nanocomposites with low filling content.
研究领域:
材料科学
·
纳米技术
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Cuicui Su,Lingling Zhang,Yuanzheng Zhang,Xiaocheng Huang,Yumin Ye,Yu Xia,Zhiyi Gong,Xiaojuan Qin,Yichao Liu,Shishang Guo
In the background of air pollution and regular COVID-19 prevention, personal protective masks are necessary for our daily life. However, protective masks with high PM0.3 filtration usually have poor air permeability and are mostly disposable, leading to a heavy burden on the environment. In this work, a reusable membrane based on piezoelectric poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] nanofibers embedded with BaTiO3 nanoparticles (BTO NPs) was developed. The P(VDF-TrFE)/BTO composite nanofibers not only have enhanced piezoelectricity and surface polarity but also have reduced diameters that could be beneficial for electrostatic adhesion, pole–polar interactions, and mechanical sieving to increase the PM0.3 capture capacity. Moreover, the BTO NPs also improved the charge storage capacity of the composite membrane, which could further enhance the PM0.3 filtration efficiency after corona treatment. The piezoelectric mask based on P(VDF-TrFE)/BTO composite nanofibers has high filtration efficiencies of 96% for PM0.3 and 98% for bacteria, while the pressure drop was only 182 Pa, which is lower than the commercial N95 standard of 343.2 Pa. Furthermore, the piezoelectric mask has a long and stable filtration performance after 5 cycles of 75% alcohol disinfection, demonstrating that the P(VDF-TrFE)/BTO composite membrane has a potential application in personal protective masks with comfortable and reusable properties.
研究领域:
材料科学
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环境科学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Haiyan Wang,Linrui Bai,Shaolong Zhong,Qian Yang,Zhimin Dang
Dielectric capacitor is an important component of power systems , but its low dielectric polarization and undesirable dielectric loss have still held back the development of miniaturized microelectronic devices. Hence, we reported core@shell structured fillers with a conducting material@insulating material double-shell to improve the dielectric performance of the poly (vinylidene fluoride) (PVDF) composites. The hybrid fillers introducing ultra-short carbon nanotube (SSCNT) as an inner layer between BaTiO 3 (BT) as a core and silica (SiO 2 ) as an outer shell were synthesized. As the thickness of the insulating shell is enough thin, the BT@SSCNT@SiO 2 /PVDF composites exhibit an enhanced dielectric constant and a concurrently suppressed dielectric loss with the decreasing thickness. The composite incorporating the filler with the thinnest SiO 2 shell has the highest dielectric constant of 12.27 and the lowest dielectric loss of 0.023 at 20 wt% filler loading where the breakdown strength is about 15 less than the maximum value of 192.5 kV/mm. Furthermore, the hybrid fillers endow the composites with impressively stable dependence on frequency in a wide range of 10 2 ∼10 5 Hz. The achievement can be ascribed to the conducting property of the SSCNT inner layer and the suitable thickness of the insulating outer layer. They can synergetically provide the composites with an optimized polarization effect at a broad frequency resulting from the improved electrical field. This work reveals that a proper structure of the core@conducting material@insulating material core@double-shell filler can be an approach to optimize the overall dielectric performance of the polymer-based composites with high energy storage density .
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）