Surfaces and Interfaces
·
2025
·
IF 6.3
Haowen Dong,Mengnan Ruan,Chengyi Wang,Tingting Zhong,Miao Zhou,Zhifeng Liu
In 2 S 3 is a promising pyroelectric material and its internal polarization field strength has a significant effect on pyro-PEC catalytic performance. Therefore, effective strategies to enhance the polarization strength of the materials play a crucial role in improving the pyro-PEC performance. Here, sulfur vacancies were introduced by simple treatment of the material with vinylpyrrolidone (PVP) solution to study the effect of sulfur vacancy introduction on the thermoelectrocatalytic properties of In 2 S 3 and the mechanism of action is analyzed. It is shown that the current density of In 2 S 3 photoanode with introduction of sulfur vacancies in the hot and cold cycling field at 1.23 V vs.RHE reaches 1.07 mA∙cm -2 , which is 3.15 times higher than that of bare In 2 S 3 . After the introduction of light, the current density reached a maximum value of 2.29 mA∙cm -2 at 1.23 V vs.RHE. It is shown that the introduction of sulfur vacancies not only changes the distribution of dipole moments between In-S, but also increases the distribution of interfacial charges with enhanced polarization effects. Meanwhile, sulfur vacancies triggered an increase in In 2 S 3 surface defects, which promoted the surface polarization behavior and enhanced the response of the material to temperature changes. This study provides a new idea for coordinated catalysis with thermal-optical-electrical multiple external field coupling.
研究领域:
材料科学
·
纳米技术
·
催化
·
固体物理
·
能量转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Liangwei Hu,Guanghui Zhang,Yangyang Zhang,Wenfei Zhang,Husheng Wang,Kun Liu,Yifei Zhang,Qifan Li,Yong Chen,Meng Shen
Pyroelectric energy harvesting has been explored to obtain high room temperature pyroelectric coefficient ( p ) along with high depolarization temperature ( T d ) for the practical applications. However, the problem that T d and p of Bi 0.5 Na 0.5 TiO 3 -based ceramics cannot be increased simultaneously has not been solved. In this work, (1- x )Bi 0.5 Na 0.5 TiO 3 - x BaNi 0.5 Nb 0.5 O 3 (BNT- x BNN, x = 0, 0.02, 0.03, 0.04 mol) lead-free ceramics were prepared by conventional solid-state reaction method. Introduction of BaNi 0.5 Nb 0.5 O 3 can facilitate lattice cell expansion and decrease of the O-B-O bond angles, providing more possibilities for the B-site ion to deviate from the equilibrium position, producing micrometer level grain size (3.25–6.15 µm) with good ferroelectric performance ( P r = 42 μC/cm 2 , P s = 47 μC/cm 2 ). The permittivity ( ε r ) of pristine samples raises from 439 to 723 when the content of BNN ascends to 0.03 mol. Hence, an enhanced room temperature p of 7.91 × 10 −4 C m −2 K −1 with a high T d of about 150 °C has been attained in BNT- x BNN with x = 0.03 mol, which concomitantly generates the energy density of 22.3 μJ/cm 3 with 90 MΩ load. Our work contributes to the development of pyroelectric properties for practical applications in energy harvesting.
研究领域:
材料科学
·
能量收集
·
铁电材料
·
陶瓷
✓ 已验证
DOI
高影响因子
Journal of Advanced Dielectrics
·
2022
·
IF 0
Chuan Chen,Yan Wang,Jiajiu Li,Chaofeng Wu,Guanrong Yang
A series of (100 − x ) Pb(Mg 1 / 3 Nb 2 / 3 ) O 3 − x PbTiO 3 (PMN − x PT, x = 24, 25, 26) ceramics were prepared by solid-state reaction technique using MgNb 2 O 6 precursor. The results of the detailed characterizations reveal that the content of PT has negligible influence on the grain size, and all samples possess the perovskite structure. As the PT content increases, the samples changed from the normal ferroelectric phase to the ergodic relaxor state at room temperature. As a result, PMN– x PT ceramics are endowed with electro-strain of 0.08% at a relatively low electric field of 2 kV/mm, and effective piezoelectric coefficient of 320 pm/V was obtained. Simultaneously, the PMN– x PT ceramics have exceptional pyroelectric performance, exhibiting a high pyroelectric coefficient p ∼ 5.5 – 6.3 × 10 − 8 C⋅cm − 2 ⋅K − 1 . This study demonstrates the great potential of PMN– x PT for piezoelectric and pyroelectric device applications.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
Small
·
2024
·
IF 13
Shulin Jiao,Xiaofan Sun,Min Zhao,Peng Chen,Zheng Tang,Dong Li,Zilong Zhou,Tingfeng Li,Wentao Zhang,Yanzhou Lu,Yizhang Wu,Kongmeng Ye,Libo Xu,Qi You,Hong-Ling Cai,Xiaoshan Wu
There is a noticeable gap in the literature regarding research on halogen-substitution-regulated ferroelectric semiconductors featuring multiple phase transitions. Here, a new category of 1D perovskite ferroelectrics (DFP) 2 SbX 5 (DFP + = 3,3-difluoropyrrolidium, X − = I − , Br − , abbreviated as I-1 and Br-2 ) with twophase transitions (PTs) is reported. The first low-temperature PT is a mmm F mm 2 ferroelectric PT, while the high-temperature PT is a counterintuitive inverse temperature symmetry-breaking PT. By the substitution of iodine with bromine, the Curie temperature ( T c) significantly increases from 348 K of I-1 to 374 K of Br-2 . Their ferroelectricity and pyroelectricity are improved ( P s value from 1.3 to 4.0 µC cm −2 , p e value from 0.2 to 0.48 µC cm −2 K −1 for I-1 and Br-2 ), while their optical bandgaps increased from 2.1 to 2.7 eV. A critical slowing down phenomenon is observed in the dielectric measurement of I-1 while Br-2 exhibits the ferroelastic domain. Structural and computational analyses elucidate that the order-disorder movement of cations and the distortion of the chain perovskite [SbX 5 ] 2− anions skeleton lead to PT. The semiconductor properties are determined by [SbX 5 ] 2− anions. The findings contribute to the development of ferroelectric semiconductors and materials with multiple PTs and provide materials for potential applications in the optoelectronic field.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CONTROLLED RELEASE
·
2023
·
IF 10.8
Jie Meng,Kun Wei,Shuang Xie,Zhanlin Zhang,Pan Ran,Peng Zhang,Xiaohong Li
The tumor diffusion and cell internalization are the major obstacles to improving delivery efficacy of therapeutic agents. External electric fields have shown strong effect on the cell membrane polarization and fluidity, but usually need complicated power management circuits. Herein, in situ generation of microelectric field on nanoparticles (NPs) is proposed to overcome these delivery barriers. Janus [email protected] NPs were developed through partially coating of polydopamine (PDA) caps on pyroelectric tetragonal BaTiO 3 (tBT) NPs and then camptothecin (CPT) conjugation via disulfide linkages. For comparison, [email protected] NPs were prepared from non-pyroelectric cubic BaTiO 3 (cBT) as control. Near-infrared (NIR) illumination on PDA caps of the Janus NPs produces asymmetric thermophoretic force to drive NP motion for tumor accumulation, deep tissue penetration and effective cell interaction. Photothermally created temperature variations on tBT NPs build pyroelectric potentials to selectively change the membrane potential of tumor cells other than normal cells and exhibit a dominated role in enhancing tumor cell internalization and cytotoxicity. The combination index analysis confirms the synergistic effect of pyroelectric dynamic therapy (PEDT), chemotherapy and photothermal therapy (PTT), leading to full inhibition of tumor growth and noticeable extension of animal survival at significant lower CPT doses. The mild PTT/PEDT, the reduced CPT dose and the selective toxicity to tumor cells have achieved favorable treatment safety after [email protected] /NIR treatment. Therefore, in response to the differences in membrane potentials and glutathione levels between tumor and normal cells, we have demonstrated a concise design to achieve thermophoresis-driven motion, pyroelectric potential-enhanced cell internalization and PTT/PEDT/chemotherapy-synergized antitumor treatment.
研究领域:
纳米技术
·
生物医学工程
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癌症治疗
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Meng Li,Weiji Sun,Wangkai Hui,Lang Liu
Photocatalytic oxidation technology is a green and low carbon approach for degradation of mineral processing wastewater, which is extensively applied to ecological environment restoration. In this research, coal gangue-ZnS/CuS pyroelectric/photothermal composite photocatalyst is constructed by high temperature calcination method. The temperature difference between heat converted from light energy absorbed by CuS and the circulating condensate water provides the impelling force for the pyroelectric effect. The porous structure of coal gangue acts as a “heat capacitor”, which furnishes greater temperature fluctuation for pyroelectric effect. Furthermore, the hydroxyl groups on the surface of coal gangue can availably adsorb oxygen and facilely form superoxide radicals with electrons. The degradation efficiency of xanthate is as high as 99.5 % within 50 min. This research has significant implications for designing and developing highly efficient photocatalysts for the degradation of mining wastewater.
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
Nature Communications
·
2023
·Vol. 14
·期 1
·1-9
·
IF 16.6
Li Bo,Cai Chuanyang,Liu Yang,Wang Fang,Yang Bin,Li Qikai,Zhang Pengxiang,Deng Biao,Hou Pengfei,Liu Weishu
Ferroelectric polymers have great potential applications in mechanical/thermal sensing, but their sensitivity and detection limit are still not outstanding. We propose interface engineering to improve the charge collection in a ferroelectric poly(vinylidene fluoride-co-trifluoroethylene) copolymer (P(VDF-TrFE)) thin film via cross-linking with poly(3,4-ethylenedioxythiophene) doped with polystyrenesulfonate (PEDOT:PSS) layer. The as-fabricated P(VDF-TrFE)/PEDOT:PSS composite film exhibits an ultrasensitive and linear mechanical/thermal response, showing sensitivities of 2.2 V kPa −1 in the pressure range of 0.025–100 kPa and 6.4 V K −1 in the temperature change range of 0.05–10 K. A corresponding piezoelectric coefficient of −86 pC N −1 and a pyroelectric coefficient of 95 μC m −2 K −1 are achieved because more charge is collected by the network interconnection interface between PEDOT:PSS and P(VDF-TrFE), related to the increase in the dielectric properties. Our work shines a light on a device-level technique route for boosting the sensitivity of ferroelectric polymer sensors through electrode interface engineering.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yi Yang Xu,Lei Meng,Miao Miao Zhao,Chu Xin Peng,Fei Yen
While all of the polymorphs of pure NH 4 I and KI are non-polar, we identify that (NH 4 ) 0.95 K 0.05 I is ferroelectric and (NH 4 ) 0.87 K 0.13 I and (NH 4 ) 0.83 K 0.17 I are pyroelectric through measurements of their pyroelectric current and complex dielectric constant. The order to disorder phase transitions occur near 245 K. Magnetic susceptibility measurements indicate that the proton orbitals of the NH 4 + continue to become ordered in the ground state in the (NH 4 ) 1–x K x I system up to x ≤ 0.17. The polar phases are proposed to stem from K + ions disrupting the symmetry of proton-orbital-lattice interactions between the NH 4 + and I – ions. Our work introduces a new pathway for the ordered phases of ammonium-based compounds to potentially become ferroelectric.
研究领域:
材料科学
·
凝聚态物理
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2022
·
IF 4.778
Xuexue Zou,Ruijian Zhu,Zhenxiang Cheng,Xueru Shi,Liang Li,Yong Zhou,Dong Wang,Wenlong Wang,Zengmei Wang,Yi Shao,Jing Bai
Environmental remediation approaches in terms of wastewater treatment and CO 2 reduction using environmental energy are highly desirable for an industrialized society. Herein, the pyrocatalytic performance of electrospun lead-free ferroelectric Ba(Ti 0.8 Zr 0.2 )O 3 - x (Ba 0.7 Ca 0.3 )TiO 3 (BZT- x BCT, x = 0.2, 0.3, 0.4, 0.5, 0.6) micro-nano fibers is investigated, and BZT-0.5BCT is identified as an efficient pyrocatalyst for water pollutants decomposition driven by rhombohedral–tetragonal ( R - T ) phase transition. Phase changes can induce high pyroelectric coefficients. In response to 0–60 °C thermal cycles, the decomposition ratio of Rhodamine B (RhB) by BZT-0.5BCT fibers after nine thermal cycles is approximately 70%. Moreover, under outdoor day-night temperature fluctuations, about 76% of RhB and 95% of methylene blue (MB) can be degraded after 10 and 7 days respectively because BZT-0.5BCT has an R-T phase change point of around 30 °C. For Cr(VI) (potassium dichromate) and tetracycline (TE), the fibers also show good pyrocatalytic degradation ability. Due to destruction of bacterial cell membranes by superoxide groups, high levels of antimicrobial activity could also be achieved against Escherichia coli (99.99%) and Staphylococcus aureus (92.83%). Furthermore, the pyrocatalytic reduction of CO 2 to acetaldehyde by BZT-0.5BCT can reach approximately 382.47 μmol g −1 after 20 thermal cycles of 0–60 °C. Therefore, such outstanding catalytic performance of pyroelectric BZT-0.5BCT fibers enables pyroelectric catalysis as a potential approach for both all-round wastewater treatment and CO 2 reduction.
研究领域:
环境科学
·
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Healthcare Materials
·
2023
·Vol. 12
·期 18
·2300338
·
IF 10
Junwu Wei,Yuan Liu,Yingxin Li,Zhanlin Zhang,Jie Meng,Shuang Xie,Xiaohong Li
Cancer phototherapy experiences limitations in tissue diffusion and cell internalization of phototherapeutic agents and dose-dependent side effects. Herein, Janus pyroelectric nanoparticles (NPs) are designed to generate self-powered motion and built-in electric fields to overcome the delivery barriers. Polydopamine (PDA) layers are partially coated on tetragonal BaTiO 3 (tBT) NPs to prepare Janus tBT@PDA, and Au NPs are deposited on the PDA caps to obtain Janus tBT@PDA-Au NPs. Near-infrared (NIR) illumination of tBT@PDA-Au builds in situ pyroelectric potentials on NPs, which selectively affect the membrane potential of tumor cells rather than normal cells to enhance tumor cell internalization and produce reactive oxygen species (ROS) for pyroelectric dynamic therapy (PEDT). The asymmetric photothermal effect of the Janus NPs creates thermophoretic force to propel NP motion, which enhances tumor diffusion and cellular uptake of NPs and boosts cytotoxicity and intracellular ROS levels. The inoculation of Au NPs increases the photothermal effect, exhibits larger motion velocities, produces higher pyroelectric potentials, and elevates cellular uptake rates, resulting in significant induction of tumor cell apoptosis, suppression of tumor growth, and extension of animal survival. Thus, the concise design of tBT@PDA-Au/NIR treatment has achieved thermophoretic motion-promoted tissue diffusion, built-in electric field-enhanced cell internalization, and photothermal/PEDT-synergized antitumor efficacy.
研究领域:
纳米技术
·
生物医学工程
·
癌症治疗
·
材料科学
·
生物物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Asia-Pacific Journal of Chemical Engineering
·
2024
·
IF 1.4
Ze Cheng,Fuxiao Zhu,Bihui Jin,Zhenhua Hou,Hongbin Li,Gongliang Zhang,Hongman Hou,Jingran Bi,Shuang Yan,Hongshun Hao
Photocatalytic technology has been widely studied, discussed, and tested as a feasible wastewater degradation technology. The present study demonstrated the preparation of g-C 3 N 4 material using solid-state sintering method and the construction of Bi 4 Ti 3 O 12 /g-C 3 N 4 heterostructure via hydrothermal method. This direct contact Z-type heterojunction improves the wide bandgap of Bi 4 Ti 3 O 12 monomer, enhances its photoresponsiveness, and thus improves its photocatalytic performance. During the process of photocatalytic experiments, an environment of cold and hot fluctuations were created, and the pyroelectric effect was utilized to induce self-polarization of the material and formed an internal electric field. It improves the transport ability of electron–hole pairs and suppresses their recombination in the transport path. According to the degradation experiment results, the degradation efficiency of pyroelectric synergistic heterojunction photocatalysis reached 88.7%, which was 2.27 times that of Bi 4 Ti 3 O 12 . It proves that the photocatalysis by pyroelectric synergistic heterojunction has good application prospects.
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
Materials Research Express
·
2020
·Vol. 7
·期 9
·095502
·
IF 1.929
Guo-Yi Li,Hong-Di Zhang,Kun Guo,Xing-Sheng Ma,Yun-Ze Long
Piezoelectric materials such as ZnO semiconductors and polyvinylidene fluoride (PVDF) have been extensively studied to produce flexible wearable devices, providing a viable method for energy collection. In this study, PVDF was mixed with ZnO nanoparticles to prepare PVDF/ZnO devices by electrospinning. The composite ZnO affects the diameter of electrospun fibers and the output performance of the devices. As ZnO was added, the diameter of the fibers decreases, but the output current of the devices increases. Moreover, compared with pristine PVDF, the bending output current and pyroelectric current of the devices were improved after mixed with ZnO. The results indicated that PVDF/ZnO composite was a promising flexible device that can provide power for small electronic devices.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）