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.
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JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Kang Wu,Yuhai Sun,Jing Liu,Juxia Xiong,Junliang Wu,Jin Zhang,Mingli Fu,Limin Chen,Haomin Huang,Daiqi Ye
The insights on the primary surface-reactive oxygen species and their relation with lattice defects is essential for designing catalysts for plasma-catalytic reactions. Herein, a series of Ba 1−x Ce x TiO 3 perovskite catalysts with high specific surface areas (68.6–85.6 m 2 g −1 ) were prepared by a facile in-situ Ce-doping strategy and investigated to catalytically decompose toluene. Combining the catalysts with a nonthermal plasma produced a significant synergy effect . The highest decomposition efficiency (100%), CO x selectivity (98.1%), CO 2 selectivity (63.9%), and the lowest O 3 production (0 ppm) were obtained when BC 4 T (Ce/Ti molar ratio = 4:100) was packed in a coaxial dielectric barrier discharge reactor at a specific input energy of 508.8 J L −1 . The H 2 -TPR, temperature-programmed Raman spectra , EPR and OSC results suggested that superoxides ( • O 2 − ) were the primary reactive oxygen species and were reversibly generated on the perovskite surface. Molecular O 2 was adsorbed and activated at the active sites (Ti 3+ -V O ) via an electron transfer process to form • O 2 − . Surface-adsorbed • O 2 − had a greater effect on the heterogeneous surface plasma reactions than the dielectric constant , and enhanced the toluene decomposition and intermediate oxidation . A possible reaction path of toluene decomposition was also proposed.
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TEXTILE RESEARCH JOURNAL
·
2024
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IF 1.6
Bo Yang,Xifeng Zhang,Jiakang Tang,Xinyu Zhu,Ming Hao,Xiaodong Hu,Yanbo Liu
The rapid development of piezoelectric sensors has been studied extensively, owing to their good flexibility, wearability, high sensitivity and low cost. However, some inorganic materials with good piezoelectricity cannot make sensors flexible, and the organic materials with good flexibility have a weak output electrical signal and low strength. In order to explore and optimize the preparation technology of piezoelectric sensors, a BaTiO3@polyacrylonitrile (PAN)/poly(vinylidene fluoride) (PVDF) nanofibrous composite membrane (NCM) was prepared by cross-electrospinning technology and the central combination design (CCD) method. The morphology, structure, hydrophobicity, mechanical properties and piezoelectricity of the BaTiO3@PAN/PVDF NCMs were investigated. The BaTiO3@PAN/PVDF NCMs had the better hydrophobicity and mechanical properties compared with the pure PAN/PVDF NCM. The 5BaTiO3@PAN/PVDF NCM designed by CCD had a more uniform fiber diameter, and a more stable output voltage with a 46% improvement. With the help of cross-electrospinning technology and the CCD method, the NCM will be outstanding for the development of fabricating flexible wearable piezoelectric sensors.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Feng Si,Bin Tang,Zixuan Fang,Hao Li,Shuren Zhang
Novel lead-free ceramics of (1- x )BaTiO 3 - x Bi(Mg 1/2 Sn 1/2 )O 3 (abbreviated as (1- x )BT- x BMS, with x = 0–0.20) were fabricated through a solid-state reaction route. Introducing BMS into the BT host triggered a ferroelectric-to-relaxor phase transition, which yielded slim polarization-electric field ( P - E ) loops and enhanced energy-storage performances. The large recoverable energy density with 2.25 J/cm 3 and high energy efficiency of 94% were obtained simultaneously under 240 kV/cm with x = 0.12. Furthermore, the energy storage characteristics of the 0.88BT-0.12BMS ceramics exhibited good temperature stability in the range of −55–150 °C, and great frequency stability in the range of 10–1000 Hz. Meanwhile, by means of pulsed charging-discharging evaluation, the 0.88BT-0.12BMS ceramics displayed a fast discharge period of 73 ns and a large power density of 27.7 MW/cm 3 . The results indicate that the elaborately designed 0.88BT-0.12BNS ceramics have promising potential for high-power pulsed capacitor applications.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Bowei Xun,Aizhen Song,Jingru Yu,Yang Yin,Jing-Feng Li,Bo-Ping Zhang
BiFeO3-BaTiO3 is a promising high-temperature piezoelectric ceramic that possesses both good electromechanical properties and a Curie temperature (TC). Here, the piezoelectric charge constants (d33) and strain coefficients (d*33) of (1 – x)BiFeO3-xBaTiO3 (BF-xBT; 0.20 ≤ x ≤ 0.50) lead-free piezoelectrics were investigated at room temperature. The results showed a maximum d33 of 225 pC/N in the BF-0.30BT ceramic and a maximum d*33 of 405 pm/V in the BF-0.35BT ceramic, with TCs of 503 and 415 °C, respectively. To better understand the performance enhancement mechanisms, a phase diagram was established using the results of XRD, piezoresponse force microscopy, TEM, and electrical property measurements. The superb d33 of the BF-0.30BT ceramic arose because of its location in the optimum point in the morphotropic phase boundary, low oxygen vacancy (VO··) concentration, and domain heterogeneity. The superior d*33 of the BF-0.35BT ceramic was attributed to a weak relaxor behavior between coexisting macrodomains and polar nanoregions. The presented strategy provides guidelines for designing high-temperature BF-BT ceramics for different applications.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
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IF 5.6
Wentao Huai,Xinyu Fu,Yifan Zhao,Zhenhao Cai,Saiwei Luan,Zhouyi Xu,Huizhan He,Jingxi Wang,Zhenxiao Fu,Xiuhua Cao,Lei Zhang,Rong Sun
Multilayer ceramic capacitors (MLCCs) are used in harsh environments such as automotive electronics, which require high reliability and temperature stability. Therefore, the regulation of Ho/Mg co-doping on the core-shell structure of BaTiO 3 -based MLCCs and the effect on temperature stability and reliability were investigated in this study. Ceramics and MLCCs device with various Ho/Mg molar ratios (1.2–1.8) were prepared using the solid-state reaction method. The study revealed the synergistic effects of Ho/Mg doping on shell concentration, shell thickness, and oxygen vacancy inhibition. The results showed that with the Ho/Mg molar ratio increase, the shell thickness increased from 27.98% to 62.24%. The temperature coefficient of capacitance (TCC) for the sample with Ho/Mg=1.8 satisfied the EIA-X7S (ΔC/C 25°C = ±22%, –55 °C to 125 °C) specification. X-ray photoelectron spectroscopy confirmed that Ho 3+ effectively captured oxygen vacancies by forming defect dipoles, while impedance spectroscopy demonstrated that the shell significantly inhibited carrier migration. Furthermore, the MLCCs device with Ho/Mg=1.8 exhibited a breakdown strength of 96.38 kV/mm and met the more stringent EIA-X7R (ΔC/C 25°C = ±15%, –55 °C to 125 °C) specification. These findings indicate that Ho/Mg co-doping effectively optimizes the core-shell structure, offering valuable theoretical guidance for developing MLCCs with enhanced temperature stability and reliability.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Hong Liu,Ren Zhu,Nannan Shi,Long Zhang,Shun Li,Jianming Zhang
Charge carrier transfer efficiency as a crucial factor determines the performance of heterogeneous photocatalysis. Here, we demonstrate a simple nanohybrid structure of BaTiO3-Au (BTO-Au) for the efficient selective oxidization of benzyl alcohol to benzaldehyde upon piezotronic effect boosted plasmonic photocharge carrier transfer. With the aid of ultrasonic mechanical vibration, the reaction rate of the photocatalytic organic conversion would be considerably accelerated, which is about 4.2 and 6.2 times higher than those driven by sole visible light irradiation and sole ultrasonication, respectively. Photoelectrochemical tests under ultrasonic stimuli reveal the BTO-Au catalytic system is independent of the light intensity, showing a consistent photocurrent density, over a wide range of incident light brightness. The largely enhanced photocatalytic activity can be ascribed to the synergetic effect of surface plasmonic resonance (SPR)–piezotronic coupling by which a built-in electric field induced by the piezotronic effect significantly favors the oriented mobilization of energetic charge carriers generated by the SPR effect at the heterojunction. Notably, a decrease of the Schottky barrier height of ∼0.3 eV at the BTO-Au interface is verified experimentally, due to the band bending of BTO induced by the piezotronic effect, which can greatly augment the hot electron transfer efficiency. This work highlights the coupling of the piezotronic effect with SPR within the BTO-Au nanostructure as a versatile and promising route for efficient charge transfer in photocatalytic organic conversion.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Ge Yang,Jinyan Xiong,Mengjie Lu,Weiming Wang,Wei Li,Zhipan Wen,Shaozhong Li,Weijie Li,Rong Chen,Gang Cheng
Photocatalytic CO 2 reduction into valuable fuel and chemical production has been regarded as a prospective strategy for tackling with the issues of the increasing of greenhouse gases and shortage of sustainable energy. A composite photocatalysis system employing a semiconductor enriched with oxygen vacancy and coupled with metallic cocatalyst can facilitate charge separation and transfer electrons . In this work, mesoporous TiO 2 and titanium-based perovskite oxides (BaTiO 3 and SrTiO 3 ) nanoparticle assembly incorporated with abundant oxygen vacancy and copper particles have been successfully synthesized for CO 2 photoreduction . As an example, the TiO 2 decorated with different amounts of Cu particles has an impact on photocatalytic CO 2 reduction into CH 4 and CO. Particularly, the optimal TiO 2 /Cu-0.1 exhibits nearly 13.5 times higher CH 4 yield (22.27 μmol g −1 h −1 ) than that of pristine TiO 2 (1.65 μmol g −1 h −1 ). The as-obtained BaTiO 3 /Cu-0.1 and SrTiO 3 /Cu-0.1 also show enhanced CH 4 yields towards photocatalytic CO 2 reduction compared with pristine ones. Based on the temperature programmed desorption (TPD) and photo/electrochemical measurements, the co-embedding of Cu particles and abundant oxygen vacancy into the titanium-based oxides could promote CO 2 adsorption capacity as well as separation and transfer of photoinduced electron-hole pairs, and finally result in efficient CO 2 photoreduction upon the TiO 2 /Cu, SrTiO 3 /Cu, and BaTiO 3 /Cu composites.
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RSC Advances
·
2020
·Vol. 10
·期 53
·31705-31710
·
IF 3.119
Hongcheng Yang,Miao Zhou,Haodong Tang,Mingyu Sun,Pai Liu,Yizun Liu,Lixuan Chen,Dongze Li,Dan Wu,Junjie Hao,Bing Xu,Zhili Zhao,Zhenwei Ren,Siqi Jia,Kai Wang,Xiao Wei Sun
Quantum dots (QDs) have received considerable attention in information displays owing to their high quantum yield, high colour purity and low-cost fabrication. However, light emission for ultra-thin QD films with low mass percentage of QDs still need to be improved because the blue light can directly transmit the films, leading to insufficient energy to excite the QDs. In this study, we report QD films based on a poly(zinc methacrylate) coating with alloyed green-emitting CdZnSeS/ZnS quantum dots (QDs@PZnMA) together with high refractive-index BaTiO3 nanoparticles to enhance the scattering coefficient of the QD films. Results demonstrate a 7.5-fold increase in the absorption coefficient, 11.3-fold increase in the scattering coefficient, 8.5-fold increase in the optical density (OD) and 8.6-fold increase in the green-light emission of QD films, compared with films that have the same mass percentage of pristine QDs. This approach provides a promising strategy for developing QD optical films with high scattering and enhanced light emission for flexible displays.
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DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 36
·12759-12768
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IF 4.099
Kun Qian,Xuguang Lv,Sheng Chen,Hang Luo,Dou Zhang
Dielectric polymer-based nanocomposites have attracted significant attention in recent years for energy storage applications because of their potential high permittivity and breakdown strength. The coupling effect of a nanofiller/matrix interface plays a crucial role in the dielectric and electric properties of polymer-based nanocomposites. In this paper, three kinds of side-chain liquid crystalline fluoric-polymers, denoted as P-nF (n = 3, 5 or 7, which is the number of terminal fluoric groups), were grafted on the surface of BaTiO3 nanoparticles by a surface-initiated reversible-addition–fragmentation chain transfer polymerization method. The nanocomposite films were prepared via core–shell BaTiO3 nanoparticles dispersed in a poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) P(VDF-TrFE-CTFE) polymer matrix. The frequency dependent dielectric properties and energy storage capability of the polymer nanocomposites were studied. The results showed that the permittivity and energy densities of the polymer nanocomposites depended on the molecular structure of the modifier, especially the number of electron-rich fluoric groups. Firstly, all modified BaTiO3 nanoparticles were homogeneously dispersed in the polymer matrix, resulting in the polymer nanocomposites presenting a higher breakdown strength compared with the unmodified BaTiO3 nanoparticles. Secondly, the changes in the nanocomposites’ permittivity exhibited diversity for three modifiers due to many influential factors. Thirdly, compared with neat P(VDF-TrFE-CTFE), the discharge energy densities of the polymer nanocomposites are all significantly improved. The highest discharge energy densities of nanocomposites with 5 vol% P-3F@BT reached 14.5 J cm−3. These findings suggest that the optimal interfacial modifier should be carefully decided by combining various properties of the nanocomposites for energy storage.
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RSC Advances
·
2016
·Vol. 6
·期 43
·36450-36458
·
IF 3.289
Chengliang Li,Shuhui Yu,Suibin Luo,Wenhu Yang,Zaochuan Ge,Haitao Huang,Rong Sun,Ching-Ping Wong
Cu nanoparticles with diameters of 15–25 nm were grown discretely on the surface of BaTiO3 (about 100 nm) via a hydrothermal method, and a polyethylene glycol 4000 layer was coated on the surface of the obtained BT–Cu hybrid particles. The PEG layer will serve as a robust interface layer to suppress the mobilization of charge carriers and protect Cu from oxidation. The BT–Cu particles were loaded as fillers in the matrix of polyvinylidene fluoride (PVDF) to fabricate the BT–Cu/PVDF composites. Microstructure and dielectric performance have been investigated. The results showed that the relative permittivity (εr) of the composites increased prominently with the loading amount and meanwhile the dielectric loss tangent was suppressed at a low level. For instance, the permittivity of BT–Cu/PVDF with the volume fraction of 53.7% reached 150 with a low loss of 0.16 at 1 kHz. The permittivities maintained high values of over 55 and the dielectric loss was less than 0.05 upto 1 GHz. Investigation on the polarization mechanisms has been conducted and the interfacial polarization between different phases should account for the high dielectric permittivity upto GHz. The energy storage characteristics were also studied.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiaxing Xie,Qun Liu,Lijuan Huang,Xingyu Chen,Chunlin Zhao,Xiao Wu,Tengfei Lin,Yong Wu,Min Gao,Cong Lin
The Fenton reaction, an effective advanced oxidation process (AOP) for degrading organic pollutants, requires the addition of H 2 O 2 that is expensive and not environmentally friendly to some extent. It has been reported that piezocatalysis can generate H 2 O 2 under mechanical excitation. Therefore, it is promising to carry out the Fenton catalysis utilizing in situ H 2 O 2 generated by piezocatalysis. However, the current piezocatalysis-assisted Fenton (Piezo-Fenton) reaction was realized by adding piezoelectric nanoparticles and Fe(II) ions to pollutant solutions, which would induce more iron-based chemicals that are not easy to recycle. Herein, Fe 3 O 4 -BaTiO 3 nanocomposites were prepared to demonstrate the feasibility of piezo-Fenton catalysis without the addition of H 2 O 2 or Fe(II) ions. The organic dye degradation efficiency of 98.2% is obtained using Fe 3 O 4 -BaTiO 3 nanocomposites in the acidic solution, one-third and two-thrid greater than that of pure piezocatalysis and that of iron-based Fenton reaction , respectively. Moreover, since the piezocatalysis process is the rate-determining step of the whole piezo-Fenton reaction, all the H 2 O 2 generated can be consumed. Considering that the solid nanocomposites can be magnetically recycled, piezo-Fenton catalysis leaves no additional chemicals in clean water and thus provides an environmentally friendly and low-cost approach for organic dye degradation.
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