Journal of Materials Chemistry C
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2020
·Vol. 8
·期 21
·7211-7220
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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.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
CATALYSIS LETTERS
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2021
·Vol. 152
·期 7
·2164-2177
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IF 3.186
Hu Yin,Chen Wei,Chen Yongxin,Zhang Fen,Song Weiguo,Wang Lingling,Fu Jianping,Ren Xiangrong,You Shengyong,Cao Changyan,Yu Zhonghua,Dong Xiaona
Rh/NaNbO 3 catalyst was prepared by a facile solvothermal method combined with photo-deposition technique. Over this catalyst, both conversion and selectivity were up to 100.0% in ten reaction recycles for the selective hydrogenation of benzoic acid to cyclohexane carboxylic acid at room temperature and 0.5 MPa H 2 pressure. TOF value of the catalyst was 207 h −1 for this hydrogenation reaction. The excellent performance and the mild hydrogenation conditions were among the best of the reference catalysts with different supports or surface metal active component. Multiple characterization techniques were adopted to further study the essence of the superior hydrogenation performance. It was found that the abundant oxygen vacancies and the reduction in situ of Rh species accounted for the excellent hydrogenation performance. Besides, the reducible perovskite support, small Rh species particle, specific morphology and pore structure of the catalyst also played important roles in improving the hydrogenation reaction. After eleven hydrogenation recycles, the inactivation of the catalyst was also investigated, and attributed to the carbon deposition and the leaching of Rh species during hydrogenation process. It is an attractive work to design the highly efficient catalysts for benzoic acid hydrogenation with potential application value. Graphic Abstract
研究领域:
催化
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化学工程
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材料科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Xinrong Zhong,Anze Shui,Hulei Yu,Yawei Fang
The remarkable polarization and stability of ceramic capacitors make them promising candidates for pulse-power devices in energy-storage systems. However, the energy-storage density of ceramic capacitors is severely limited by the negative correlation between the maximum polarization ( P m ) and the breakdown strength (BDS), leading to the impediment of broader applications. Herein, we reconcile the contradiction by synthesizing high-performance NaNbO 3 -based ceramics via chemical doping with Bi(Ni 0.5 Ti 0.25 Zr 0.25 )O 3 (BNTZ). An antiferroelectric-paraelectric phase transition with a decline in polarization hysteresis is induced by the dopant. Further studies have shown that the existence of a tiny quantity of the polar phase in the nonpolar matrix contributes to a higher P m , and the enhancement of both electrical resistivity and activation energy of the conductance also improved their BDS. The thinning process is also identified to be important in the improvement of its BDS and W rec , resulting in the maximum energy-storage density of 3.53 J/cm 3 with an energy efficiency of 74.2 % in thinned 10 mol% BNTZ-doped NaNbO 3 samples. Our findings provide a feasible approach to simultaneously improving energy-storage density and efficiency in NaNbO 3 -based ceramic capacitors.
研究领域:
材料科学
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电气工程
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能源存储
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Jingkai Min,Hongshun Hao,Yirui Zhao,Yutong Hu,Qiqi Huang,Fuxiao Zhu,Gongliang Zhang,Jingran Bi,Shuang Yan,Hongman Hou
In the present study, NaNbO 3 -CdS nanorods composites with pyroelectric effect were used to degrade RhB solution and sterilize Salmonella under room-temperature cold-hot cycles. The pyrocatalytic decomposition rate of NaNbO 3 -CdS reached 90 % under 45 cold-hot (25–55 °C) cycles while the antibacterial rate of NaNbO 3 -CdS also achieved 90 % under 45 cold-hot (17–37 °C) cycles. Compared with the pyrocatalytic effect of single NaNbO 3 , with the hole’s radicals and superoxide radicals as the main active species, the pyrocatalytic effect of the NaNbO 3 -CdS was significantly enhanced. It is mainly attributed to its surface electrons being captured by CdS, thereby reducing the recombination probability of electron pairs. After four repeated experiments, the high pyrocatalytic activity still maintained, which indicated that the property of NaNbO 3 -CdS composites was stable. The composite nanocatalyst has potential in the degradation of dye pollution and sterilization by temperature difference.
研究领域:
材料科学
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环境科学
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纳米技术
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催化
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微生物学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
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2021
·Vol. 10
·期 2
·716-725
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IF 7.393
Jinpeng Li,Junhao Jiang,Qilin Cheng,Zhongkai Cui,Xiaoyun Liu,Peiyuan Zuo,Qixin Zhuang
Polymeric dielectrics with high-temperature resilience are of critical importance in developing advanced electrostatic capacitors. Poly(p-phenylene benzobisoxazole) (PBO) is a polymer with excellent thermal stability. However, poor processability and low intrinsic dielectric constant restrict its application in high-performance dielectrics. In this study, PBO is synthesized by the precursor method, and the polymer films are prepared via solution casting which is more convenient than the traditional processing method. Moreover, a hierarchically structured one-dimensional Al2O3@NaNbO3 is designed and introduced into the PBO matrix. Due to the high aspect ratio and the unique structure of Al2O3@NaNbO3, the dielectric properties and breakdown strength of the nanocomposite have been substantially increased. The nanocomposite filled with 3 vol% Al2O3@NaNbO3 possesses the highest breakdown strength of 286 kV mm−1 while maintaining a high dielectric constant of 6.68 and a low dielectric loss of 0.035 at 1 kHz, and the energy density increased to 1.64 J cm−3 at 250 kV mm−1 (≈200% higher than that of pure PBO). In addition, the dielectric properties of 3 vol% Al2O3@NaNbO3–PBO exhibit excellent thermal stability from 25 to 250 °C which is attributed to the thermal resistance of both PBO and Al2O3@NaNbO3. This work provides a promising way to fabricate polymeric dielectrics for use in extreme environments.
研究领域:
材料科学
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电气工程
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产品关联
DOI
高影响因子
Journal of Materiomics
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2021
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IF 6.425
Yang Yin,Jing-Ru Yu,Yu-Cheng Tang,Ai-Zhen Song,Huan Liu,Dong Yang,Jing-Feng Li,Lei Zhao,Bo-Ping Zhang
NaNbO 3 -based ceramics usually show ferroelectric-like P-E loops at room temperature due to the irreversible transformation of the antiferroelectric orthorhombic phase to ferroelectric orthorhombic phase, which is not conducive to energy storage applications. Our previous work found that incorporating CaHfO 3 into NaNbO 3 can stabilize its antiferroelectric phase by reducing the tolerance factor ( t ), as indicated by the appearance of characteristic double P-E loops. Furthermore, a small amount of MnO 2 addition effectively regulate the phase structure and tolerance factor of 0.94NaNbO 3 -0.06CaHfO 3 (0.94NN-0.06CH), which can further improve the stability of antiferroelectricity. The XRD and XPS results reveal that the Mn ions preferentially replace A-sites and then B-sites as increasing MnO 2 . The antiferroelectric orthorhombic phase first increases and then decreases, while the t shows the reversed trend, thus an enhanced antiferroelectricity and the energy storage density W rec of 1.69 J/cm 3 at 240 kV/cm are obtained for 0.94NN-0.06CH-0.5%MnO 2 (in mass fraction). With the increase of Mn content to 1.0 % from 0.5 %, the efficiency increases to 81 % from 45 %, although the energy storage density decreases to 1.31 J/cm 3 due to both increased tolerance factor and non-polar phase.
研究领域:
材料科学
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陶瓷
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储能
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电陶瓷
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DOI
高影响因子
ACS Applied Nano Materials
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2023
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IF 5.9
Xinyao Ni,Jingyu Lin,You Yuan,Xinhua Wang,Peiyuan Zuo,Xiaoyun Liu,Qixin Zhuang
The development of high-performance antiferroelectric ceramics/polymeric materials with great thermal stability has attracted considerable interest due to their extensive use in efficient power sources and electronic devices. Nevertheless, the high energy storage density and thermal stability of dielectrics are seriously restricted due to their poor processibility and weakened breakdown strength (Eb). To resolve these tough issues, it would be highly effective and feasible if an organically modified high-aspect-ratio one-dimensional (1D) antiferroelectric ceramic can be employed. Specifically, the 1D nanofiller can extend the breakdown path and improve the local electric field distribution while the organic modification endows dielectrics with enhanced interface polarization and improved compatibility, thus yielding high energy storage density. Herein, a series of high-aspect-ratio 1D NaNbO3 nanofiller with organic insulating reduced polyaniline (R-PANI) layer are synthesized by the oxidative polymerization and then introduced into the polyetherimide (PEI) matrix. The prepared NaNbO3@R-PANI/PEI nanocomposites possess enhanced dielectric constant up to 9.8 as well as ultralow dielectric loss (0.009) while maintaining the high energy density of 2.46 J/cm3 (1.4 times of that for pure PEI) and high efficiency of 82.6% at 200 MV/m at a small loading of 3 vol %. Depending on the unique structure of the coated R-PANI, the 3 vol % NaNbO3@R-PANI/PEI increased the energy density up to 4.4 J/cm3 and maintained high efficiency of 70.9% at 200 MV/m under 150 °C, therefore making it a potential candidate for polymeric dielectric materials used in extreme environments.
研究领域:
材料科学
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电气工程
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纳米技术
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2020
·
IF 5.774
Chun Tong,Liquan Jing,Minqiang He,Meng Xie,Wei Wei,Yuanguo Xu,Hui Xu,Huaming Li
Designing a green and efficient catalyst to effectively degrade antibiotics is still one of the hot topics of research. Firstly, 1D nanorod Fe 2 O 3 /NaNbO 3 composite was successfully prepared by the two steps strategy through hydrothermal combined calcination method. In addition, the photocatalytic activity of the samples was evaluated by the degradation of tetracycline (TC) under visible light irradiation. The test results show that the 5% Fe 2 O 3 /NaNbO 3 nanorod material exhibits superior degradation rate of TC (89.4% removal efficiency in 90 min), and shows 5.62 times than that of NaNbO 3 nanorods. Under UV–visible light irradiation, 5% Fe 2 O 3 /NaNbO 3 nanorod composite with H 2 O 2 solution can degrade 97.4% of TC in 60 min, which is 12.1 times greater to that of the pure NaNbO 3 nanorods. The outstanding degradation performance may be attributed to the introduction of Fe 2 O 3 nanoparticles, which can activate H 2 O 2 more efficiently and produce more free radicals to degrade pollutants. At the same time, the 5% Fe 2 O 3 /NaNbO 3 nanorod composite can also act as an activate persulfate (PS) and generate SO 4 − to efficiently degrade TC. In addition, the catalyst also showed good performance in degrading TC in the presence of different anions and cations. Plant growth experiment ( mung bean seeds ) results showed that the degradation products have obvious lower toxicity. This study provides new domain about the designing of a photo-Fenton catalyst having dual ion synergy (Fe 3+ /Fe 2+ and Nb 5+ /Nb 4+ ) and full spectrum response.
研究领域:
环境科学
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催化材料
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污染控制
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DOI
高影响因子
CATALYSIS LETTERS
·
2018
·Vol. 149
·期 1
·180-189
·
IF 2.911
Hu Yin,Chen Wei,Ba Mingwei,Song Weiguo
Solvent-free selective hydrogenation of α -pinene to synthesize cis -pinane with high efficiency has always been a challenge in the catalytic research. The key to achieve this goal is the development of the highly efficient and recyclable catalysts. Cubic NaNbO 3 crystals were functionalized by (γ-aminopropyl)-triethoxysilane (APTS) and decorated with Ru species by a simple solvothermal approach combined with a sol-gel method. And this compound was applied to the catalytic hydrogenation of α -pinene. The crystal phase, chemical structure and surface components of the catalysts were analyzed by X-ray diffraction, field emission transmission electron microscope, X-ray photoelectron spectroscopy, Fourier transform infrared spectra and thermogravimetric analysis. APTS-functionalization of the catalyst surface contributes to the highly dispersed and uniform Ru species with small particle size, leading to the outstanding conversion of α -pinene and selectivity of cis -pinane over NaNbO 3 /APTS/Ru catalyst. The performance of this catalyst is better than that of other similar catalysts, and is comparable to that of commercial Ru/C. The possible mechanisms of the formation of catalyst and the hydrogenation reaction were proposed and discussed. The decrease of catalytic performance after seven cycles should be ascribed to the decomposition and leaching of APTS during the hydrogenation process. The work provides an alternative strategy to design a kind of reusable catalyst with highly efficient hydrogenation performance based on the surface functionalization. Graphical Abstract
研究领域:
催化
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材料科学
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化学工程
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物理化学
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产品关联
DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Wang Yunfan,Zheng Zihao,Ren Lele,Du Yifeng,Guo Jinming,Zhang Shujun,Nan Ce-Wen,Li Bao-Wen
Sodium niobate (NaNbO 3 ), traditionally recognized as an antiferroelectric material, has garnered significant attention for its potential in energy storage, electromechanical devices, and electrocaloric applications. Central to unlocking its full potential is precise control over its ferroic orders, particularly the transition between antiferroelectric and ferroelectric phases. In this study, we propose a topochemical conversion strategy for fabricating pure ferroelectric NaNbO 3 membranes with a P 2 1 ma orthorhombic phase regardless of membrane thickness. Using Scanning transmission electron microscopy, we identify two distinct regions with large ( > 10°) or small ( < 1°) octahedral tilts in the ferroelectric NaNbO 3 membranes. Polarization analyses in these regions reveal that the ferroelectricity originates from the out-of-plane displacement of Nb 5+ cations. Additionally, the pure ferroelectric NaNbO 3 membranes demonstrate thickness-dependent piezoelectric enhancement, achieving a d 33 value of 93.7 pm/V at 30 nm thickness, as well as pronounced resistance switching behaviors. This study introduces an innovative molten salt environment-controlled synthesis strategy, enabling efficient production of high-quality pure ferroelectric NaNbO 3 membranes, and advancing their integration into next-generation functional devices.
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DOI
PubMed
高影响因子
ACTA MATERIALIA
·
2024
·
IF 8.3
Kun Wei,Jianhong Duan,Gaosheng Li,Huifen Yu,He Qi,Hao Li
Multi-phase NaNbO 3 (NN) exhibits high adjustability on the ordering of both polarization and oxygen octahedral tilt, becoming a perfect carrier to design heterogeneous structure for boosting comprehensive energy storage properties. To balance the energy storage density and efficiency, the coexistence of the relaxor antiferroelectric (AFE) with high polarization capability and the relaxor ferroelectrics (RFE) with high efficiency is designed in this work by introducing Sr 0.7 Bi 0.2 □ 0.1 Ti 0.75 Ta 0.2 □ 0.05 O 3 (SBTT) into NaNbO 3 -BiFeO 3 . As a result, an outstanding capacitive energy density ( W rec ) of 12.25 J cm −3 with a high η of 83 % can be achieved in NN-BF-SBTT ceramic, which can be identified as a novel heterogeneous coexisting structure with the crossover of high polarization capability in relaxor AFE and high efficiency in RFE in terms of high-resolution TEM. Furthermore, grain refinement and the dense structure inhibit the leak current, suppress the concentration of oxygen vacancy defects and raise the activation energy ( E a ), thus enhancing the E B . These excellent energy storage properties overcome the trade-offs between the two sets of parameters ( W rec - η , Δ P - E B ), offering a refreshing strategy for the development of high-performance ceramic capacitors.
研究领域:
材料科学
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能源存储技术
·
陶瓷材料
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Bingsen Wang,Junjun Wang,Yuxiao Du,Jian Dai,Zhenhao Fan,Wenfeng Yue,Fu Huang,Atilla Evcin,Yasemin Tabak,Limei Zheng,Dawei Wang
NaNbO 3 (NN)-based dielectric ceramics for energy storage have garnered significant interest due to their high saturation polarization, low residual polarization, and superior breakdown strength ( E b ). However, the low recoverable energy storage density ( W rec ) and efficiency ( η ) significantly limited their practical application. Herein, BiFeO 3 (BF) was incorporated into NN to optimize the energy storage performance. The NN-BF ceramics exhibited pronounced antiferroelectric (AFE) relaxor phase, alongside grain size reduction and E b enhancement, which contributed to a significant increase of W rec and η . Specially, the optimum W rec of 4.43 J/cm³ and η of 71.51 % were achieved at the composition of 0.9NN-0.1BF. Besides, stable energy storage performance was maintained over a wide temperature range (20–120 °C). These results highlight the potential of NN-BF relaxor AFE ceramics as promising candidates for high-performance energy storage applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）