ACS Applied Nano Materials
·
2023
·
IF 5.9
Cijun Shuai,Xiuwen Gao,Yifeng Wang,Hongyi Qian,Wei Li,Shuling Liu,Huarui Zhou,Shuping Peng,Fangwei Qi
Bismuth sulfide (Bi2S3) could respond to near-infrared light to generate photocurrent, demonstrating tremendous potential in constructing self-powered electrical stimulation to accelerate bone regeneration. Nevertheless, the facile recombination of electron–hole pairs undermined its photoelectric performance. Herein, a sea-buckthorn-like nanostructured Bi2S3–BaTiO3 was synthesized by loading BaTiO3 nanoparticles onto Bi2S3 nanorods through a self-assembly method and then integrated into poly-L-lactic acid (PLLA) powders to fabricate PLLA/Bi2S3–BaTiO3 scaffolds. Piezoelectric BaTiO3 would deform under stress to produce instantaneous polarization, which triggered positive and negative charges presented on the relative surfaces of BaTiO3. Thus, the photogenerated electrons and holes of Bi2S3 would be, respectively, transferred to the positive and negative charged surfaces of BaTiO3, thereby achieving the electron–hole separation. Results revealed that under ultrasonic irradiation, the photoluminescence peak intensity of Bi2S3–BaTiO3 was significantly reduced compared with that of Bi2S3, confirming the improved electron–hole pair separation. Accordingly, the photocurrent of Bi2S3–BaTiO3 was increased by approximately 1.4 times in comparison with that of Bi2S3. The enhanced photocurrent effectively promoted cell proliferation and differentiation by upregulating alkaline phosphatase expression, enhancing calcium nodule deposition, and promoting cellular Ca2+ influx. Consequently, this work provided a perspective for establishing a self-powered electrical stimulated scaffold for bone repair.
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高影响因子
ENVIRONMENTAL POLLUTION
·
2019
·
IF 5.714
Zhu Mengting,Tonni Agustiono Kurniawan,Song Fei,Tong Ouyang,Mohd Hafiz Dzarfan Othman,Mashallah Rezakazemi,Saeed Shirazian
Methylene blue (MB) is a dye pollutant commonly present in textile wastewater. We investigate and critically evaluate the applicability of BaTiO 3 /GO composite for photodegradation of MB in synthetic wastewater under UV–vis irradiation. To enhance its performance, the BaTiO 3 /GO composite is varied based on the BaTiO 3 weight. To compare and evaluate any changes in their morphologies and crystalline structures before and after treatment, BET (Brunauer–Emmett–Teller), XRD (X-ray diffraction), FTIR (Fourier transform infrared spectroscopy), SEM (scanning electron microscopy) and TEM (transmission electron microscopy) tests are conducted, while the effects of reaction time, pH, dose of photocatalyst and initial MB concentration on its photodegradation by the composite are also investigated under identical conditions. The degradation pathways and removal mechanisms of MB by the BaTiO 3 /GO are elaborated. It is evident from this study that the BaTiO 3 /GO composite is promising for MB photodegradation through ·OH. Under optimized conditions (0.5 g/L of dose, pH 9.0, and 5 mg/L of MB concentration), the composite with 1:2 dose ratio of BaTiO 3 /GO has the highest MB degradation rate (95%) after 3 h of UV vis irradiation. However, its treated effluents still could not comply with the discharge standard limit of less than 0.2 mg/L imposed by national environmental legislation. This suggests that additional biological treatments are still required to deal with the remaining oxidation by-products of MB, still present in the wastewater samples such as 3,7-bis (dimethyl-amino)-10H-phenothiazine 5-oxide.
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PubMed
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 .
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高影响因子
POLYMER COMPOSITES
·
2018
·
IF 1.943
Bin Wang,Yue Ma,Bing Na,Ruihua Lv,Hesheng Liu,Weiping Li,Haiying Zhou
Polymer film capacitors with high stability and reliability at elevated temperatures are promising for next-generation power electronic systems and hybrid electric vehicles. In this work, sandwich-structured composite films with good dielectric thermal stability were fabricated based on hybrid membranes of poly(vinylidene fluoride)/polyacrylonitrile blend nanofibrous skeleton highly filled with BaTiO 3 nanoparticles. Composite films with 64.7 vol% BaTiO 3 nanoparticles in the core layer exhibited high permittivity (38.1) and low loss (0.046) at 1 kHz and room temperature, and the dielectric permittivity and loss were only slightly increased to 41.5 and 0.08, respectively, at 120°C. Good dispersion and high loading of BaTiO 3 nanoparticles in the composites films contributed to enhanced dielectric thermal stability and permittivity. Moreover, the composite films showed good flexibility, which could be ascribed to its sandwich-structure. Our work paves a generic way to fabricate flexible composite films with excellent dielectric thermal stability via high loadings of ceramic nanoparticles. POLYM. COMPOS., 39:E1841–E1848, 2018. © 2018 Society of Plastics Engineers
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2017
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IF 2.714
Ze-Hui Dai,Jia-Rui Han,Yang Gao,Jun Xu,Jinliang He,Bao-Hua Guo
Polymer nanocomposites with high dielectric permittivity ( ε ) are urgently demanded for power energy storage. In this research, in order to prepare nanocomposites with strong interfacial interactions and higher ε , a novel surface modification molecule, 3,4,5-trihydroxybenzoic acid (or Gallic acid, GA), was developed. There are two main advantages for selecting GA as the coating molecule. Firstly, the polar groups, such as hydroxyl and carboxyl groups in GA, could form hydrogen-bonding interaction with poly(vinylidene fluoride- co -chlorotrifluoroethylene) (PVDF-CTFE). Therefore, though thickness of coating layer is only 1.6 nm, nanocomposites with better dispersion were prepared by strengthening hydrogen-bonding interaction at polymer-nanoparticle interface. Secondly, functional groups with high bond dipole moment, such as carboxyl groups and phenolic groups, are beneficial to obtain high ε in PVDF-CTFE + BT@GA. ε is 25.6 at 1 kHz with 12.9% BT@GA. This is about 2.5 times higher than that of PVDF-CTFE matrix (10.4 at 1 kHz). The hypothesis in this research might offer a feasible approach to prepare capacitors with higher ε and higher energy density by regulating bond dipole moment of functional groups in the coating molecules.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2015
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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 .
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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.
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高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
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2020
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IF 7.094
Hai-Yan Wang,Yan-bin You,Jun-Wei Zha,Zhi-Min Dang
For present ceramic particles/polymer dielectric composite materials, their dielectric properties and thermal conductivity haven't met the application requirement at the same time. In this research, to achieve this goal, barium titanate@super short MWCNTs (BT@SSCNT) core-shell particle was prepared in a confinement reactive space built by water phase and oil phase. Polyvinylidene fluoride (PVDF) based composite flexible films reinforced by the BT@SSCNT particles possessed desired dielectric and excellent thermal behaviors. Especially for the composite film with 60 wt% (containing less than 17 wt% SSCNT) loading, at 10 2 Hz and in the wide temperature range of −40–140 °C, dielectric constant and dielectric loss varied from 476 to 764 and from 2.74 to 4.58, respectively. Meanwhile the thermal conductivity of this film reaches 25.43 W/(m K). The promising dielectric properties and high thermal conductivity of the films are attributed to multiple roles of SSCNT shell layer including external electric field applying on BT particles, tremendous interfacial polarization area, restricted electron motion and electron efficient in transporting heat. The BT@SSCNT/PVDF composite films can be a promising candidate for the modern electronic industry.
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高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2019
·Vol. 23
·期 3
·749-758
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IF 2.531
Zhang Yi,Wang Xiaohui,Feng Wei,Zhen Yichao,Zhao Peiyao,Li Longtu,Cai Ziming
For all-solid-state lithium-ion batteries, several disadvantages such as low ionic conductivity and poor interfacial stability have been concerned. According to previous studies, BaTiO 3 nanoparticles can improve the electrochemical properties of PEO-based solid polymer electrolytes (SPEs). This study elucidates the effects of different sizes and contents of BaTiO 3 fillers on SPEs. The BaTiO 3 nanoparticles with average size of 5 nm, 100 nm, and 500 nm and content from 4 to 20 wt% were incorporated into SPEs by solution casting method. For the SPE with 8 wt% 5 nm BaTiO 3 , it possesses the highest ionic conductivity of 2.2 × 10 −5 S cm −1 at 25 °C and 1.9 × 10 −3 S cm −1 at 80 °C. In the LiFePO 4 /SPE with 8 wt% 5 nm BaTiO 3 /Li cell, it indicates a high initial discharge specific capacity of 140.7 mAh g −1 at 0.1 °C rate and the specific capacity remains 97.8% after 50 cycles at 80 °C.
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高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 21
·7211-7220
·
IF 7.059
Qinzhao Sun,Jiping Wang,Lixue Zhang,Pu Mao,Shujuan Liu,Liqiang He,Fang Kang,Rong Xue
The choice of dielectric fillers and structure design play an important role in improving the energy storage properties of polymer-based nanocomposites. In this work, a class of sandwich-structured poly(vinylidene fluoride) (PVDF)-based nanocomposites with an insulating layer containing 1D NaNbO3@SiO2 nanowires was prepared using simple casting and hot-pressing methods. 1D NaNbO3 nanowires coated with a SiO2 insulating layer were introduced into the polymer matrix to form a central layer, which has high insulation and low dielectric permittivity. Consequently, the sandwich-structured nanocomposites with 9 vol% 0D BaTiO3 nanoparticles and 1 vol% 1D NaNbO3@SiO2 nanowires exhibit a high discharge energy density of ∼20 J cm−3 at 450 MV m−1 as well as a high discharge efficiency of 75%, indicating a combination of high energy density and high efficiency compared with the systems of all-polymer composites or polymer-based nanocomposites. The dielectric analyses and simulation results indicate that the improved energy storage density and discharge efficiency are attributed to the effect of insulating layers containing 1D NaNbO3@SiO2 nanowires. The findings of this work demonstrate that introducing insulating layers containing 1D nanofillers with high insulation and low permittivity can have a positive effect in improving energy storage performance of dielectric polymer-based nanocomposites.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Wei Wu,Nana Liu,Xiaohui Sun,Xueying Zhao,Quan Yuan,Xuyang Zhang,Bo Wang,Li'e Mo,Xiangwei Wang,Xianhui Rong,Guohua Wu
Polymer dispersed liquid crystals (PDLC) could function as an energy-efficient smart window, enabling the reversible transition between transparent and opaque states when applied bias voltages. However, the requirement for high switching voltages presents a challenge, resulting in severe energy consumption that contradicts objectives for sustainable energy conservation and emission reduction. Herein, this study synthesizes barium titanate/methyltrimethoxysilane/silver (BTO/MPTMS/Ag) composites successfully and incorporates it into the PDLC, designing for the low-energy-consumption smart window. Barium titanate nanowires (BTO NWs) enhance the dielectric constant of the PDLC film, while Ag nanoparticles (Ag NPs) exploit localized surface plasmon resonance (LSPR) to amplify the local electric field. Consequently, this synergistic effect of BTO NWs and Ag NPs reduces the threshold voltage and the saturation voltage to 10 V and 19 V, corresponding to decreases of 60 % and 62 %, respectively. Significantly, experiential results confirm that the incorporation of BTO/MPTMS/Ag nanoparticles does not affect the electro-optical nature of the PDLC film adversely. The work provides a promising approach for the preparation of advanced optical devices and energy-efficient equipment.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Mingcheng Ye,Jiaming Ye,Dandan Ma,Zhiyao Zhang,Zuyong Feng,Deping Xiong,Miao He
SnO 2 is considered a promising anode material for lithium-ion batteries (LIBs) due to its significant theoretical capacity derived from alloying and conversion reactions for lithium storage. However, its development is hindered by considerable volume changes, sluggish kinetics, and limited reversibility of the conversion reaction. In this study, carbon-encapsulated graphite nanosheets-hosted SnO 2 -BaTiO 3 composites (C@SnO 2 -BaTiO 3 -G) with heterojunction structure were synthesized by simple ball milling and calcination, and the material as anode for LIBs exhibits a high specific capacity of 1367.7 mAh g −1 after 200 charge-discharge cycles at a current density of 0.1 A g −1 . Even at a high current density of 5 A g −1 , after 2500 long-cycle tests, its specific capacity can still remain at 401.7 mAh g −1 . The addition of BaTiO 3 can effectively enhance the conversion reactions of SnO 2 . The outer carbon layer and graphite nanosheets serve to protect the structure of the composite material during cycling, preventing agglomeration and coarsening. The C@SnO 2 -BaTiO 3 -G composite material effectively addresses the shortcomings of SnO 2 , making it an excellent anode material for high-performance LIBs.
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危险品化学品经营许可证（带存储）