JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 28
·期 1
·487-492
·
IF 1.798
Zhang Xinxiu,Liu Jinsong,Zhu Kongjun,Wang Jing,Li Ziquan,Qiu Jinhao
High-quality lead-free piezoelectric x Mn-doped (K 0.48 Na 0.52 ) 0.985 Li 0.015 NbO 3 films (KNLN; x = 0, 0.01, 0.02, 0.03) were successfully deposited onto Pt(111)/Ti/SiO 2 /Si(100) substrates by sol–gel method. Effects of Mn substitution on the microstructure, dielectric properties, ferroelectric properties, and leakage current of the KNLN films were investigated in detail. Mn-doping can significantly improve the ferroelectric properties and decrease the leakage current of KNLN films. Optimal dielectric properties were obtained in films doped with 2 mol% Mn, whose dielectric constant and dielectric loss at 1 kHz were 875 and 0.030, respectively. In addition, well-saturated ferroelectric P - E hysteresis loop with large remanent polarization (2 P
r ) and coercive field ( E
c ) of 22.5 μC/cm 2 and 65 kV/cm were obtained in 2 mol% Mn-doped KNLN film at an applied electric field of 200 kV/cm.
研究领域:
材料科学
·
物理学
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Fenghua Shen,Chaolong Liu,Jie Yu,Kaisong Xiang,Bangwei Bai,Xin Liang,Guangpeng Sun,Shide Li,Hui Liu
To address the issues of low activity and poor stability of manganese-based catalysts in the catalytic degradation of refractory volatile organic compounds such as chlorobenzene (CB), this study designed a sodium-doped Mn-Cu bimetallic catalyst supported on hydroxyl-rich pseudo-boehmite (PB), denoted as Na-CuMnO x /PB, depending on the route of “support hydroxylation, bimetallic synergy, and alkali metal modification”. The catalyst achieved highly efficient degradation of CB under room temperature with the non-thermal plasma assistance. The PB support significantly increased surface hydroxyl groups and acidity. MnO x /PB showed a degradation efficiency of 85.14 %, superior to the 73.98 % achieved by a conventional Al 2 O 3 -supported catalyst. Cu doping promoted the formation of a Mn-Cu synergistic structure, increasing the surface-adsorbed oxygen to 56.59 % and the Mn(IV)/Mn(III) ratio to 0.63, thereby improving the degradation efficiency to 92.02 %. However, chlorine deposition (Cl content: 3.91 %) caused rapid deactivation. After Na modification, the Na-CuMnO x /PB catalyst exhibited a further increased Mn(IV)/Mn(III) ratio of 0.79, enhanced weak basic and acidic sites. The abundant surface hydroxyl groups and alkaline sodium hydrolysis facilitated HCl generation, achieving an HCl selectivity of 40.95 % with surface chlorine deposition as low as 0.59 %, thereby enabling the catalyst to maintain a degradation efficiency of 95.95 % over 16 h. Mechanism studies revealed the crucial roles of acid-base sites, reactive oxygen species, and metal valence states in CB degradation. The bimetallic system promotes the redox cycling between Cu(II)/Cu(I) and Mn(IV)/Mn(III), enabling continuous regeneration of active species. This work provides new insights for designing highly active and chlorine-tolerant catalysts for low-temperature purification of chlorine-containing VOCs.
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高影响因子
Frontiers in Chemistry
·
2019
·
IF 3.782
Hao Guo,Yong Hu,Xiaoping Zhang,Rongliang Zhang,Dong Hou,Yulei Sui,Ling Wu
In this paper, we report a facile one-step hydrothermal method to synthesize tetragonal Na3V2(PO4)2F3@C particles which are connected by carbon nanotubes (CNTs) networks, using water as hydrothermal solvents. In this strategy, the reduction and crystallization of materials are carried out in the hydrothermal process (180°C, 12 h), no additional heat treatment is required. The well-crystallized Na3V2(PO4)2F3 tetragonal grains (5–10 μm) are coated with amorphous nano-carbon and connected by highly conductive CNTs. The addition of CNTs can not only improve the conductivity of materials but also effectively inhibit the Na3V2(PO4)2F3 grains over growth. The Na3V2(PO4)2F3@C/CNTs composite possesses very flat charge/discharge platforms of 3.6 and 4.1 V. The sample exhibits an initial discharge specific capacity of 120.2 and 74.3 mAh g−1 at 0.1 and 10 C rate, respectively, and shows excellent cyclical stability. The composite owns excellent electrochemical performances owing to the three-dimensional highly conductive network which is co-constructed by the CNTs and nano-carbon coating layer.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机化学
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DOI
高影响因子
SOLID STATE IONICS
·
2020
·
IF 3.107
Jian Liu,Ying-Ge Xu,Ling-Bin Kong
Sodium-ion batteries (SIBs) and Sodium-ion capacitors (SICs) have great promise for large-scale energy storage. However, the mismatch of electrode kinetics and charge-storage capacity between anode and cathode materials remains a challenge. Here three-dimensional self-assembled MoS 2 /SnS 2 -reduced graphene oxide (MoS 2 /SnS 2 -RGO) anode material with fast Na-ion diffusion rate and pseudocapacitive charge storage has been successfully prepared via a facile hydrothermal method . With this particular structure, the Na-ion diffusion coefficient of MoS 2 /SnS 2 -RGO calculated by GITT achieves 5.53 × 10 −7 cm 2 s −1 during the desodiation process, which effectively improves the reaction kinetics for anode material. When tested against metal sodium in the potential window of 0.01–3.00 V, the optimized MoS 2 /SnS 2 -RGO delivers an excellent reversible capacity of 818.9 mA h g −1 at a specific current of 100 mA g −1 after 100 cycles and a superior rate capability of 555.4 mA h g −1 at 2000 mA g −1 over 500 cycles. So far, MoS 2 /SnS 2 -RGO possesses the highest reversible capacity among the reported anode materials . Furthermore, a SIC composed of optimized MoS 2 /SnS 2 -RGO anode and a CC cathode reaches a high specific energy of 113.9 W h kg −1 at specific power of 561.25 W kg −1 . Similarly, a SIB consisted of the MoS 2 /SnS 2 -RGO anode and a Na 3 V 2 (PO 4 ) 3 /C cathode displays the reversible discharge capacity of 56 mA h g −1 at the high rates of 2 C.
研究领域:
材料科学
·
能源存储
·
电化学
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·
IF 6.3
Decheng Kong,Zhanhui Peng,Qizhen Chai,Yuanhao Wang,Di Wu,Lingling Wei,Pengfei Liang,Zupei Yang,Xiaolian Chao
In recent years, there have been many significant breakthroughs in the research of potassium sodium niobate (KNN) based piezoelectric ceramics, positioning them as promising candidates for high-temperature piezoelectric device applications. To achieve synergistic optimization of high piezoelectric performance and high Curie temperature, the composition was designed to lie within the orthorhombic-tetragonal (O-T) phase coexistence region at room temperature by regulating the K/Na ratio, while the overall lattice stability was preserved. Our results show that the 0.96(KₓNa 1-x )(Nb 0.98 Sb 0.02 )O 3 -0.04Bi 0.5 Li 0.5 HfO 3 ceramic at x = 0.48 exhibits a high inverse piezoelectric constant of ~1383 pm/V and a strain of 1.32%, which are primarily attributed to the reduced polarization switching barrier enabled by the O-T phase coexistence at room temperature. Meanwhile, the local structural heterogeneity introduced by Sb 5+ and Hf 4+ doping further enhances the electrical strain response. Notably, the ceramic maintains a high Curie temperature of 276 °C, governed by the intrinsic lattice stability without significant compromise, confirming its great potential for high-temperature piezoelectric device applications.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Jialong Wang,Jinmeng Xiang,Huihui Cao,Renze Chen,Xinyu Long,Changheng Chen,Jiwen Chang,Chongfeng Guo
Cr 3+ -activated phosphor has become the mainstream choice to obtain broadband near-infrared phosphor-converted light-emitting diodes (NIR pc-LED) for the applications of bio-imaging and component nondestructive detection. However, exploring efficient and stable Cr 3+ -activated NIR phosphors is still an important yet formidable challenge. Herein, a series of Na y K 3- y LiMg 4 (Si 2 O 5 ) 6 :Cr 3+ phosphors was synthesized, which exhibits a broadband emission spectrum spanning 650-1100 nm. Utilizing the innovative non-main lattice substitution strategy, the internal quantum efficiency (IQE) of Cr 3+ was enhanced from 21% to 80%, and thermal stability was also improved from 42% to 70%@150 °C. Based on the first-principles theory calculation, the IQE and thermal stability improvement are attributed to the strengthened local structure stability around Cr 3+ caused by the introducing of Na + . Finally, a NIR pc-LED device was packaged by combining the optimized Na 3 LiMg 4 (Si 2 O 5 ) 6 :4%Cr 3+ phosphor with blue LED chip, which demonstrates potential applications in biological imaging and night vision systems.
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Small Methods
·
2018
·Vol. 3
·期 4
·1800111
·
IF 0
Yuruo Qi,Junmei Zhao,Chao Yang,Huizhou Liu,Yong-Sheng Hu
Sodium vanadium fluorophosphate, Na 3 (VO 1− x PO 4 ) 2 F 1+2 x (0 ≤ x ≤ 1), is proved to be a series of very promising cathode materials for Na-ion batteries, owing to the high operating voltage and structural stability. However, the selective preparation of phase-pure Na 3 (VO 1− x PO 4 ) 2 F 1+2 x (0 ≤ x ≤ 1) with outstanding electrochemical performance still remains a big challenge. Moreover, there are lots of discrepancies concerning the Na-storage properties, including a diversity of voltage profiles and capacities reported, based on the variety of synthetic methods. Herein, a comprehensive investigation is conducted about the fabrication of phase-pure Na 3 (VO 1− x PO 4 ) 2 F 1+2 x (0 ≤ x ≤ 1) by employing different starting materials and corresponding synthetic conditions, based on a facile low-temperature hydrothermal strategy. Results show that the pH in the reaction system may be of vital importance for the successful preparation of Na 3 (VO 1− x PO 4 ) 2 F 1+2 x (0 ≤ x ≤ 1) with special microarchitecture. Furthermore, it is found that NaH 2 PO 4 ·2H 2 O is the most appropriate phosphorus source, while VCl 3 , VOSO 4 · x H 2 O, and NH 4 VO 3 are the best choices of vanadium sources to prepare Na 3 (VO 1− x PO 4 ) 2 F 1+2 x (0 ≤ x ≤ 1) with superior Na-storage performance. This is the first time that the underlying correlations between the starting materials and the Na-storage performance, are investigated and further that guidance for the selective synthesis of phase-pure Na 3 (VO 1− x PO 4 ) 2 F 1+2 x (0 ≤ x ≤ 1) with superior performance is provided.
研究领域:
材料科学
·
电化学
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DOI
Pharmaceuticals
·
2026
·Vol. 19
·期 2
·275
·
IF 5.7
Zhongnan Hu,Hui Liu,Weihua Wu,Tayyab Ali,Adam Junka,Farukh S. Sharopov,Xuan Zou,Shisong Fang,Yanfang Sun
Background: Influenza A virus is an acute respiratory virus that spreads quickly, affects a broad range of populations, and can lead to many complications and mortality.ArtemisiaL. species are widely used in traditional medicine, but their antiviral potential against H1N1 remains uncertain.Methodology: Network pharmacology and molecular docking were used to computationally explore their potential function in this domain, and to investigate how their invasion mechanisms and adsorption occur. UPLC-MS/MS analysis identified the main components of the extracts. The anti-H1N1 mechanism ofArtemisiaL. extracts was studied in vitro.Results: Network pharmacology identified 95 key targets betweenArtemisiaL. and IAV, with quercetin and luteolin as core active compounds. Molecular docking predicted strong binding affinities between these compounds and influenza virus proteins. UPLC-MS/MS analysis identified 75, 100, and 64 chemical components inACBE,AALE, andACTE, respectively, mainly flavonoids and terpenoids.ArtemisiaL. extracts exhibited both preventive and therapeutic effects against H1N1, reducing progeny virus NP mRNA and protein levels. In vitro experiments showed that higher concentrations of the extracts prevent virus attachment to MDCK cells by denaturing the HA protein. NA plays an essential role in progeny virus release. We found that a high concentration of ACTE can inhibit NA up to 85%, and ACBE showed a low inhibitory effect on NA.Conclusions: In terms of therapeutic effects,ArtemisiaL. extracts can regulate intracellular inflammatory factors via the TLR4/NF-κB/MyD88 signaling pathways and reduce the expression of IL-1β, IL-6, TNF-α, TLR4, NF-κB, p65, and MyD88 at the mRNA level, thereby inhibiting H1N1 virus replication. These results suggest that bioactive components inArtemisiaL. extracts may inhibit H1N1, potentially leading to the development of natural-product-based anti-influenza agents.
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高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Shuting Zhao,Wentao Qi,Chao Yang,Rui Ling
Na 3 V 2 (PO 4 ) 3 has received a lot of attention as a prospective cathode for sodium-ion batteries (SIBs) owing to its strong 3D wide-open architecture for Na + transport. However, the practical application is still hampered by its poor electronic conductivity and weak Na + diffusion kinetics . In this paper, a novel Mg 2+ -doped Na 3 V 2 (PO 4 ) 3 flower-like cathode (Na 3+x V 2-x Mg x (PO 4 ) 3 /C, x = 0, 0.02, 0.04, 0.06) with abundant mesoporous has been synthesized by a convenient template-assisted sol-gel method. Mg 2+ doping successfully triggers V 4+ /V 5+ reversible redox with improved voltage plateau and reversible capacity. The hierarchical mesoporous structure combined with carbon layers is beneficial to the fast transport of Na + and e − , which guarantee improved kinetic properties and enhanced conductivity. Attributed to these competitive advantages, significantly improved electrochemical properties of Na 3.04 V 1.96 Mg 0.04 (PO 4 ) 3 /C (NVMP-4) are acquired, including extremely high specific capacity (123.8 mAh g −1 at 1C), excellent rate performance (73.8 mAh·g −1 at 100C) and exceptionally stable energy output with 89.1 % capacity retention after 3000 cycles at 20C. Additionally, when assembled with a hard carbon anode (HC), NVMP-4||HC provides an exceptional energy density of 216.9 Wh kg −1 at 0.2C. By enhancing nanostructure and rational surface engineering, this project offers fresh perspectives for creating superior electrodes, increasing the energy density of SIBs.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
LANGMUIR
·
2026
·
IF 4.4
Ziyi Wan,Chunxi Hai,Yanxia Sun,Shengde Dong,Luxiang Ma,Qi Xu,Xin He,Yuan Zhou
Na3V2(PO4)3 has garnered significant attention as a promising cathode material for sodium-ion batteries due to its excellent ionic conductivity and robust structural stability. However, its further large-scale practical application has been hindered by its low electrical conductivity and poor interface kinetics. Therefore, it is reported in this study that the discharging/charging cycling and rate performance of Na3V2(PO4)3 cathodes are dramatically improved by the uniformly formed 3D carbon networks. Evidently, the Na3V2(PO4)3 cathode material prepared under the optimized conditions exhibited a relatively high initial capacity of 109.30 mAh/g at 0.1C with an initial Coulombic efficiency (ICE) of 99% and achieved an appreciable capacity of 99.42 mAh/g with a capacity retention of 96.39% after 400 cycles at 2C. Based on different characterizations and electrochemical performances, both the formation and sodium storage mechanism of Na3V2(PO4)3-based composite cathodes were initially concluded, which is significant and important for improving electrical conductivity and designing practical carbon-cladding strategies for Na-ion batteries.
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高影响因子
Laser & Photonics Reviews
·
2023
·Vol. 18
·期 3
·2301039
·
IF 11
Qianxi Pang,Yichao Wang,Liqing Yan,Ge Zhu,Sai Xu,Jinsu Zhang,Xizhen Zhang,Yongze Cao,Baojiu Chen
Technological progress has promoted the development of ultra-wide near-infrared (NIR) luminescent materials as a new NIR light source. The ultra-wide near-infrared (NIR) emission in Na(Al,Ga) 11 O 17 :xCr 3+ (NAGO:xCr 3+ ) phosphors is achieved by constructing unique Cr 3+ -Cr 3+ ion pair confined structure. The Cr 3+ -Cr 3+ ion pairs can be observed at a low concentration of Cr 3+ ions(x = 0.04), the increase of Ga 3+ ion would promote the formation of Cr 3+ -Cr 3+ ion pairs, thereby effectively enhancing the energy migration process from high-energy Cr 3+ ions to low-energy Cr 3+ ones. Herein, the full width at half maximum can be finely adjusted in a wide range from 17 to 223 nm, while the emission peaks can shift from 704 to 860 nm. NAGO:xCr 3+ exhibits the longest-wavelength emission in the known Cr 3+ -doped galliates and aluminates phosphors. The study further reveals the inherent mechanism of affect on the photoluminescence properties for Cr 3+ -Cr 3+ ion pairs. The quantum efficiency of optimal NaAl 11 O 17 :0.004Cr 3+ (sharp emission) and NaGa 11 O 17 :0.02Cr 3+ (ultra-wide emission) samples reaches 87.6% and 46.6% with high thermal stability (84.47% and 67.52%@150 °C), respectively. The comprehensive properties are excellent among known phosphors with similar property. Multifunctional applications of NAGO:xCr 3+ in agricultural production, quality inspection, and imaging fields are also demonstrated.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xin Hou,Tianyu Li,Yanling Qiu,Mingqin Jiang,Qiong Zheng,Xianfeng Li
Electrolyte plays an important role in conducting sodium ions and carrying out chemical/electrochemical reactions. However, the impact mechanism of microscopic solvation structure remains vague but is significant for the electrolyte design. Here we reveal that the inner relationship between solvation structure and electrochemical reaction is manifested intuitively by manipulating the anions in the solvated shell, which determines Na storage kinetics and SEI evolution process. The result elucidates the weak coulomb interaction between PF 6 − and Na + could promote Na + transport number in bulk liquid and Na storage kinetics. And it could induce PF 6 − to reduce preferentially and facilitate additive to enter solvation structure, thereby forming a thin&compact&protective SEI with layered morphology. The excellent SEI would protect anode effectively, inhibiting decomposition of solvents and improving battery performances. As expected, 5 Ah Na 3 V 2 (PO 4 ) 3 -hard carbon pouch-type batteries with well-matched PF 6 − -based electrolyte display a high specific energy of 129 Wh kg −1 , a superior rate capability with capacity retention of 90 % at 5 C and cycling stability with retention of 86.82 % at 1 C after 700 cycles.
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