ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yingbo Cao,Jinfeng Lin,Yunjing Shi,Guohui Li,Cheng Shi,Kun Zhu,Guanglong Ge,Chukai Chen,Fei Yan,Weiwei Yang,Lihui Xu,Bo Shen,Jiwei Zhai
To meet the requirements of environmental friendliness, high-performance lead-free piezoelectric materials have become important materials for next-generation electronic devices. Here, lead-free and potassium-free NaNbO3 (NN)-based ceramics with high piezoelectric (d33 = 361 ± 10 pC/N) and dielectric (εr = 4500) properties were obtained by tolerant preparation techniques. The excellent piezoelectric and dielectric properties can be attributed to the relaxor morphotropic phase boundaries (R–MPB) and coexisting domain regions, which are beneficial in lowering the free energy and greatly improving the dielectric response and domain switching capability. Furthermore, the d33 of NaNbO3-10Ba(Ti0.7Sn0.3)O3-1.5NaSbO3 (NN-10BTS-1.5NS) ceramics can be maintained at 350 pC/N over the range of 25–80 °C with a change rate of less than 10%, exhibiting excellent temperature stability. Based on a series of in situ characterizations, the variations of the phase and domain structures of NN-based relaxor piezoelectric ceramics with temperature are clearly demonstrated. This work not only proposes new materials for sensors and actuators but also provides an excellent strategy for designing high-performance piezoelectric ceramics through phase and domain engineering.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Wei Shao,Fei Han,Yin Hu,Wei Chen,Yu Xie,Lingling Wang,Xuanye Chen,Fen Zhang,Lin Ding
The design and theoretical study of green, low-cost heterojunction photocatalysts with strong interfacial interactions are crucial for achieving efficient and stable photocatalytic hydrogen evolution (PHE). This study proposes a simple method to synthesizing graphene quantum dots (GQDs)/NaNbO 3 heterojunction with dynamic oxygen vacancies. GQDs promote the formation of oxygen vacancies and increase the surface-active sites of NaNbO 3 , significantly enhancing light absorption efficiency. This results in superior separation of photogenerated charge carriers in the GQDs/NaNbO 3 composite and improves PHE activity and stability. Under the reaction conditions of methanol as a sacrificial agent, the 0.5%GQDs/NaNbO 3 catalyst exhibited the highest hydrogen production rate of 775.9 μmol·g −1 ·h −1 . Notably, in cyclic stability tests, the catalyst demonstrated higher catalytic activity in subsequent cycles compared to the initial cycle. The activity of the second round was 1.5 times that of the first round, and the hydrogen evolution rate was 1204.9 μmol·g −1 ·h −1 . This improvement is likely attributed to the fast electron transport channel between NaNbO 3 and GQDs, which facilitated the transfer of photo-generated electrons from NaNbO 3 to GQDs, thereby promoting the generation of dynamic oxygen vacancies and improving the PHE performance. Electron Spin Resonance (ESR) and X-ray Photoelectron Spectroscopy (XPS) analyses confirmed the crucial role of dynamic oxygen vacancies in enhancing catalytic activity. Furthermore, Density Functional Theory (DFT) calculations and experimental results elucidated the charge transfer mechanism and PHE process. This study provides valuable insights for the design of efficient and durable photocatalysts.
研究领域:
材料科学
·
能源化学
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产品关联
DOI
PubMed
高影响因子
CATALYSIS COMMUNICATIONS
·
2023
·
IF 3.7
Shubo Sun,Haihan Yu,Mingzhi Hua,Lina Zhang,Chaomin Gao,Xin Cheng
Promoting the effective separation of photo-generated charge carriers is vitally crucial to enhancing the photocatalytic performance. The piezo-phototronic effect, which could regulate the directional migration of photogenerated carriers, has been regarded as an effective strategy of separating carriers. Herein, the NaNbO 3 @ZIF-8 which possesses efficient carrier separation property is prepared to achieve significant increase of H 2 evolution rate (1.16 mmol g −1 h −1 ) under the coupling effects of ultrasonic vibration and light irradiation, which is 1.9 times than that of NaNbO 3 . This work provides a strategy for studying the promotion of carrier separation and promoting photocatalytic performance under an external field.
研究领域:
材料科学
·
光催化
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产品关联
DOI
高影响因子
Coatings
·
2024
·Vol. 14
·期 11
·1392
·
IF 2.9
Yangyang Zhang,Hui Li,Erping Wang,Jingxia Gao,Liqin Yue,Miao Zhao,Ling Zhang
NaNbO3-based ferroelectric composites are regarded as a highly promising typical energy storage material. In this work, 0.02xMnO2−(1−x)NaNbO3−xBi0.5Na0.5TiO3composites were prepared by the solid-state sintering method and their microstructure, energy storage performance, and temperature stability were analyzed. As observed by the SEM images, the addition of Bi0.5Na0.5TiO3to NaNbO3in appropriate amounts can effectively suppress grain growth, which is beneficial for improving the breakdown field strength. Whenx= 0.3, an optimal value of 210 kV/cm is achieved. Meanwhile, as 2θ = 33.2°, the most intense XRD peak can be observed, indicating excellent solid solubility between the phase components. Consequently, 0.006MnO2–0.7NaNbO3–0.3Bi0.5Na0.5TiO3composites demonstrated an impressive discharging storage density of 2.464 J/cm3and a considerable energy storage efficiency of 85.8%. In addition, within the temperature range of 30–80 °C, the fluctuation in energy storage density remains below 10%. All the above performances indicate that this type of material exhibits excellent practicality in the field of pulse power supply.
研究领域:
材料科学
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Xue Bai,Tao Fan,Gang Chen,Jie Wang,Cong Ji,Chao Chen,Zixuan Zhang,Wei Cai,Rongli Gao,Chunlin Fu
NaMg 0.12 Nb 0.88 O 3 - x BiYbO 3 (abbreviated as NMN- x BY) ( x = 0, 0.005, 0.01, 0.015, 0.02, 0.04 and 0.08) ceramics were fabricated by using a traditional solid-state reaction method. The crystal structure, morphology, relaxation behavior and energy storage properties of NMN- x BY) ceramics were systematically investigated. X-ray diffraction patterns (XRD) demonstrates that all samples present a single pseudo-cubic phase. It is also found that the grain sizes vary irregular with the BY content, and it can be reduced by the appropriate addition of BY content as indicated by scanning electron morphology. From the measured dielectric properties , it can be seen that all samples are transformed from normal ferroelectric (FEs) to relaxor ferroelectric (RFEs). The maximum relaxor diffuseness coefficient γ (∼1.78) is obtained for 0.98NMN-0.02BY ceramic. As x increases, the polarization-electric ( P - E ) hysteresis loops gradually become slimmer. The largest discharged energy density (∼0.998 J/cm 3 ) and the maximum energy efficiency (∼70%) are obtained at 170 kV/cm for x = 0.04. Meanwhile, the discharge energy densities present relatively excellent temperature stability for x = 0.02 in the temperature range from 20 to 140 °C. This work demonstrates a wide potential application in enhancing the storage properties of lead-free ferroelectric materials by co-doping MgO and bismuth-based perovskites .
研究领域:
材料科学
·
电介质物理
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 8
·1-12
·
IF 2.8
Yan Xin,Xie Ming,Pan Liangfeng,Ai Tao,Li Zhuo,Niu Yanhui
The recombination of charge carriers in photocatalysts is one of the main factors restricting photocatalytic performance. In this paper, the NaNbO 3 /g-C 3 N 4 heterojunction photocatalyst was prepared by a simple ultrasonic mixing approach and applied to obtain superior piezo-photocatalytic activity. The results showed that the NaNbO 3 nanowires were attached to the g-C 3 N 4 surface for efficient degradation of rhodamine B (RhB). Through the synergistic action of visible-light irradiation and ultrasonic vibration, the RhB solution could be degraded within 30 min by 5% NaNbO 3 /g-C 3 N 4 heterojunction. The reaction rate constant ( k ) of 5% NaNbO 3 /g-C 3 N 4 heterojunction is 2.7 times that of pure g-C 3 N 4 . Moreover, quenching tests and electronic spin resonance (ESR) indicated that ·O 2 − was the primary active species for RhB degradation. The enhanced photocatalytic performance was attributed to the formation of the heterojunction at the NaNbO 3 /g-C 3 N 4 interface. Furthermore, the piezoelectric field that originated from the bending deformation of NaNbO 3 nanowires effectively promoted charge carriers separation efficiency in the NaNbO 3 /g-C 3 N 4 heterojunction.
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
Surfaces and Interfaces
·
2024
·
IF 5.7
Jizhong Deng,Qi Sun,Zhiyi Wu,Yuanyu Wang
The self-driven flexible piezoelectric sensor has wide application prospects in areas such as health monitoring, human-machine interaction, and warning detection due to its advantages of non-toxicity and high sensitivity. In this study, a composite film of poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] doped with NaNbO 3 (NN) was prepared by electrospinning. The highly oriented NN particles promote the formation of P(VDF-TrFE) β phase, reaching a maximum β phase content of 91%. Under mechanical motion at a frequency of approximately 3 Hz, the piezoelectric nanogenerator (PENG) fabricated from the nanofiber membrane achieved a maximum piezoelectric output of 17.3 V and 12 V in the transverse and longitudinal piezoelectric responses, respectively. With an external load of 100 MΩ, the PENG obtained a maximum power density of 0.67 μW/cm². Additionally, the PENG sensor exhibited sensitivity to various human activities and demonstrated high sensitivity and rapid response in monitoring the status of the proposed door lock opening/closing, highlighting its enormous potential in security monitoring applications.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Xueqiong Lei,Fan Zhang,Meiyue Li,Jihang Liu,Xiaoyue Ma,Chao Wang,Xuequan Gao,Zhan Jie Wang
Due to their high power density, rapid charging and discharging rate, and environmental friendliness, lead-free dielectric capacitors are receiving extensive attention in energy storage devices. Whereas, their inherent low recoverable energy density ( W rec ) remains a bottleneck that restricts their practical application. It is of great significance to exploit lead-free dielectric ceramics with high energy storage capacity and good reliability. In this work, NaNbO 3 (NN)-modified [(Bi 0.5 Na 0.5 ) 0.94 Ba 0.06 ] 0.6 (Bi 0.2 Sr 0.7 ) 0.4 TiO 3 (BNBT-SBT) ceramics were developed to obtain excellent energy storage characteristics. The results revealed that NN doping leads to the refinement of grain, the enhancement of relaxation behavior, the increase of resistivity, and the expansion of band gap, observably improving the breakdown strength ( E b ). Notably, under a great E b of 697 kV/cm, the BNBT-SBT-0.07NN ceramic exhibits superior energy storage characteristics with W rec of 7.46 J/cm 3 and efficiency ( η ) of 82.3 %. Furthermore, this system displays good thermal stability, frequency stability, and charge-discharge features. These findings suggest that NN modification can effectively tailor the energy storage performance of BNBT-based ceramics, and the as-prepared BNBT-SBT-0.07NN system has the potential to be applied in pulsed power systems.
研究领域:
材料科学
·
功能陶瓷
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电介质物理
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能源存储
·
无铅材料
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2020
·
IF 4.217
Yekun Zhu,Yun Zhang,Lili Cheng,Mohammed Ismael,Zhiyuan Feng,Ying Wu
The g-C 3 N 4 /NaNbO 3 photocatalyst was synthesized by simply calcining the mixture of NaNbO 3 and melamine. The synthesized composite exhibits high photocatalytic performance in the selective oxidation of 5-Hydroxymethylfurfural (HMF) to 5-formyl-2-furancarboxylic acid (FFCA) when using water as solvent. The structure and composition of g-C 3 N 4 /NaNbO 3 photocatalysts were characterized by TG, XRD, SEM, UV–Vis, FT-IR, and XPS methods, and the optical and electrochemical properties were investigated by EIS, PC, and PL techniques. O 2 − was inferred to be the primary active species in this process based on the active species trapping experiment. Heterostructure formation of g-C 3 N 4 /NaNbO 3 composites efficiently promoted the separation of photo-generated electron-hole pairs and accelerated the electron transfer rate, thus reduced the formation of OH, and sequentially improved the selectivity of FFCA. The highest HMF conversion of 35.8% with FFCA selectivity of 87.4% was achieved on C/N-59.6 photocatalyst under the irradiation of visible light. The possible mechanism and reaction route were also proposed.
研究领域:
化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2019
·
IF 3.261
Shuguang Li,Zhiyu Liu,Zhihui Qu,Congcong Piao,Jize Liu,Duo Xu,Xiaojing Li,Jun Wang,Youtao Song
It is first reported that an all-solid-state Z-scheme NaNbO 3 -Au-Sn 3 O 4 nanocomposite photocatalyst can be prepared by ultrasonic dispersion and calcination methods. In NaNbO 3 -Au-Sn 3 O 4 , NaNbO 3 and Sn 3 O 4 form a Z-scheme photocatalytic system, Au as an electron transfer channel accelerates the flow rate of the photo-induced electrons. Their effective combination can not only improve the utilization ratio of sunlight but also achieve the effective segregation of photo-induced electron-hole pairs. The fabricated samples were characterized by XRD, Raman spectra, SEM, TEM, UV–vis DRS, XPS and PL. In addition, the activity of the NaNbO 3 -Au-Sn 3 O 4 photocatalyst was researched via the photocatalytic degradation of carbofuran in wastewater under sunlight irradiation. The sunlight illumination time, NaNbO 3 and Sn 3 O 4 mole ratio, cycle number and pesticides types as influence factors on the photocatalytic degradation efficiency of Z-scheme NaNbO 3 -Au-Sn 3 O 4 photocatalyst are investigated in detail. The possible mechanism and degradation pathways for the photocatalytic degradation of carbofuran caused by Z-scheme NaNbO 3 -Au-Sn 3 O 4 photocatalyst under sunlight irradiation are put forward. The research results show that the all-solid-state Z-scheme NaNbO 3 -Au-Sn 3 O 4 photocatalyst displays a wonderful activity for degradation of carbofuran in 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
NANO
·
2018
·
IF 1.1
Yanmei Feng,Zhiqiang Wang,Yunfeng Yang,Xiangfeng Wu,Xiaodong Gong,Yajian Liu,Yufei Li,Zuolin Cao,Chao Wang,Xin Tong
The Ag 2 SO 3 /NaNbO 3 hybrids have been fabricated via a facile method at room temperature. Several methods such as X-ray diffraction, UV-Vis diffuse reflectance spectroscopy, scanning electron microscopy, electrochemical impedance spectroscopy and X-ray photoelectron spectroscopy were used to characterize the samples. Moreover, the photocatalytic activity of the samples was assessed by degradation of rhodamine B and methyl orange under the visible light illumination. Experimental results indicated the photocatalytic degradation efficiency of the as-fabricated hybrids was first increased and then decreased with increasing the dosage of NaNbO 3 . When the molar ratio of Ag 2 SO 3 to NaNbO 3 was 1:0.7, the as-fabricated composites had the best photodegradation efficiency of 96.4% in 30 min for rhodamine B and 97.1% in 60 min for methyl orange, respectively. These were obviously higher than that of pure samples. Furthermore, Ag 2 SO 3 was conjugated with NaNbO 3 via chemical-bonds rather than physical contact. In addition, the possible photocatalytic degradation mechanism was also provided and the main roles during the process of photocatalytic degradation were played by holes.
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 ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Lin Wang,Haoshuang Gu,Jian He,Tingting Zhao,Xuewen Zhang,Chuan Xiao,Hui Liu,Xianghui Zhang,Yuebin Li
The adsorption and photodegradation performance are of paramount importance to photocatalysts in environmental hazards, especially in serious organic pollutants leaking emergency in the absence of natural light illumination. Here we demonstrated a surface ligand assisted localized crystallization (SLALC) method to scale synthesis of cubic phase NaNbO 3 (c-NaNbO 3 ) photocatalyst at a low temperature as 350 °C. The as synthesized c-NaNbO 3 nanoparticles could adsorb 95% of methylene blue (MB) in 3 min and photodegrade 99.3% of MB in 180 min. Moreover, the as prepared c-NaNbO 3 nanoparticles exhibit both outstanding adsorption and photodegradation recoverability, which shows great potential in actual environmental conservation.
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
危险品化学品经营许可证（带存储）