Nanoscale
·
2020
·Vol. 12
·期 16
·9208-9218
·
IF 6.895
Jie Guo,Jun Cheng,Hui Tan,Qichun Sun,Jun Yang,Weimin Liu
The development of a high-performance nanoparticle (NP) additive for lubricating oil is a research hotspot for the tribology and engineering areas. In this study, the concept of a novel liquid nano-additive has been proposed based on the emergence of Ga-based liquid metals (GLMs), which display excellent extreme-pressure and high-temperature lubricity. Herein, the liquid NPs (designated as GLM-NP/C12) were prepared from a GLM droplet through the ultrasonic method, modified with 1-dodecanethiol, and are mainly distributed at 286 ± 21 nm. They have a core–shell structure with liquid-state GLM on the inside, and gallium oxide and a self-assembled alkylthiolate monolayer on the outside. In terms of the tribological performance, GLM-NP/C12s have a wonderful dispersion-stability in PAO10 oil, and provide excellent anti-adhesion, friction-reducing, and wear-resistance properties. When the additive concentration was 0.17 wt% in PAO10, the friction coefficient was reduced by 39% and the wear rate was reduced by 93% compared to those lubricated by the neat PAO10. This kind of liquid nano-additive has the advantages of easy preparation, internal composition regulation and recyclability, compared to conventional solid NPs. In addition, the liquid NPs were readily introduced into the frictional interfaces. More generally, the optimal additive concentration of the liquid NPs was much lower than that of the solid NPs. This observation has important implications for understanding the differences of the lubrication mechanisms between the solid and liquid nano-additives, and may provide a new design method and strategy of nano-additives for lubricating oil.
研究领域:
材料科学
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机械工程
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表面工程
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PubMed
高影响因子
ECS Journal of Solid State Science and Technology
·
2023
·Vol. 12
·期 2
·023010
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IF 2.2
Zhentao Wang,Haisheng Zheng,Lei Zhang,Zhan Cheng,Feiwen Zhao,Ruzhong Zuo,Tianyu Li,Dong Xu
In this paper, (M0.5Ta0.5)0.05Ti0.95O2 (M = Al, Ga, In) ceramic materials were successfully prepared by Flash Sintering (FS) under an electric field of 550 V cm−1 at 1200 °C for 18 min. The influences of different ionic radius on flash sintering behavior, crystal structure, microstructure and dielectric properties of TiO2-based colossal permittivity (CP) ceramics were systematically investigated. FS can reduce the sintering temperature by 200 °C and shorten the sintering time by more than 12 times. The results show that all flash sintering samples were pure rutile TiO2 structure. The grain size decreased with increasing ionic radius. ATTO had the lowest dielectric loss of 0.2 and ITTO had a maximum dielectric constant of 8100 at 1 kHz. XPS analysis confirms that Ti3+ content increased gradually with increasing ion radius. Impedance spectroscopy analysis shows that all flash sintering ceramics were composed of semi-conductive grains and insulating grain boundaries. The CP behavior was explained using the internal barrier layer capacitance effect. This work provides a very meaningful method for the preparation of co-doped TiO2 CP ceramic materials.
研究领域:
材料科学
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电子材料
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DOI
高影响因子
ADVANCED MATERIALS
·
2025
·Vol. 37
·期 41
·e03562
·
IF 26.8
Shangqing Qu,Tianhao Niu,Xianji Qiao,Yanran Shen,Guohong Cai,Xiaoge Wang,Yonggang Wang,Zhipeng Zhou,Shipeng Zhang,Zeyue Zhang,Guobao Li,Guanqun Cai,Junliang Sun
Na- β ″-Al 2 O 3 is a highly promising solid-state electrolyte (SSE) for solid-state sodium batteries (SSSBs) with a wide electrochemical stability window and excellent stability against metallic sodium. However, its practical application is hindered by the instability of β ″ phase ( R 3 ¯ $\bar 3$ m ) during sintering, low polycrystalline ionic conductivity at room temperature, and poor interfacial contact with sodium anodes. In this study, a stablized SSSB is obtained via doping Ga 3+ into Na 1.67 Mg 0.67 Al 10.33 O 17 (NMAO), which also suppresses the formation of the β ′ phase ( P 6 3 / mmc ) and decreases stacking faults. After sintering at 1550 °C for 2 h, Na 1.67 Mg 0.67 Al 9.33 GaO 17 (NMA9.33GO) exhibits an ionic conductivity of 9.2 × 10 −4 S cm −1 at 30 °C, ≈1.7 times greater than NMAO. Furthermore, Ga 3+ doping enhances the wettability with sodium, achieving superior contact stability and the formation of Na-Ga alloys at the interface significantly improves electrode-electrolyte contact stability, achieving a high critical current density (CCD) of 0.8 mA cm −2 and a low interfacial impedance of 16 Ω cm 2 . A quasi-solid-state battery assembled with Na 3 V 2 (PO 4 ) 3 (NVP) as the cathode demonstrates excellent cycling stability and rate performance, retaining a high discharge capacity of 91 mAh g −1 at 5 C, and maintaining 87% capacity retention after 1000 cycles at 1 C. This work provides new insights into improving electrolyte performance and interfacial engineering through doping strategies, thereby promoting the development of efficient and long-term SSSBs.
研究领域:
材料科学
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电化学
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储能
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固态电池
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DOI
PubMed
高影响因子
International Journal of Nanomedicine
·
2024
·
IF 6.6
Jing Kong,Jiabin Lai,Min Wang,Yi Xie,Haifei He,Jiayu Gu,Tao Pan,Zhiqiang Lu,Lifeng Jiang
Background Chemodynamic therapy (CDT) faces challenges of low catalytic ion efficiency and ROS production. We developed a ROS nano-bomb, Cu/ZIF-8@GA-Fe, to address these issues.Methods The nano-bomb was synthesized by doping copper into ZIF-8 and assembling Fe3+ and gallic acid (GA). It was tested for reactive oxygen species (ROS) generation in acidic conditions and its photothermal properties.Results In an acidic micro environment, Cu/ZIF-8@GA-Fe effectively released Fe3+ and Cu2+, depleting GSH and generating ROS. The GA-Fe coating provided photothermal heat and was used to enhance Fenton reactions via dual ions for increasing ROS production. In vivo and in vitro experiments, Cu/ZIF-8@GA-Fe inhibited tumor growth with minimal side effects.Conclusion Cu/ZIF-8@GA-Fe shows promise for safe and effective CDT, offering a synergistic approach to tumor therapy.
研究领域:
纳米技术
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癌症治疗
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生物医学工程
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材料科学
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PubMed
高影响因子
EUROPEAN JOURNAL OF PHARMACEUTICAL SCIENCES
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2022
·
IF 5.112
Nan Jin,Ruotong Chen,Yuling Li,Ziyi Zhang,Baomei Zhang,Jianmin Chen
The aim is to achieve the targeting function of Aptamer 21-2 (Apt) by modifying glycyrrhizic acid (GA) to obtain Apt-GA and by delivering it through mesoporous silica in μm-size (μmS). Moreover, it is planned to induce synergistic effects of the novel amorphous preparation of Apt-GA with curcumin (Cur) in the treatment of psoriasis. UV/vis spectrophotometric analysis and Fourier transform infrared spectroscopy were performed to demonstrate the linkage of Apt and GA. The replacement of GA with Apt-GA in GA-Cur-μmS did not make a difference in the amorphous state, but showed superior fluorescence of Cur in the inflamed dermis similar to psoriatic induced by imiquimod. Consequently, compared to GA-Cur-μmS and Apt, Apt-GA-Cur-μmS exhibited less pronounced psoriatic characteristics in vivo , including Psoriasis Area and Severity Index, histological image, immunohistochemistry and immuno-fluorescence labeling neutrophils. The enzyme-linked immunosorbent assay showed a similar phenomenon that less IL-17A was observed after treatment with Apt-GA-Cur-μmS than with GA-Cur-μmS or Apt. Our finding suggests that this novel Apt delivery system achieved the Apt targeting function in the dermis by taking advantage of GA and μmS, and exhibited synergistic anti-psoriatic effect by co-delivering curcumin .
研究领域:
药剂学
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皮肤科
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分子生物学
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药物递送系统
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PubMed
高影响因子
Frontiers in Plant Science
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2018
·
IF 3.677
Li Zhan,Gao Yue,Zhang Yuchan,Lin Cheng,Gong Dongting,Guan Yajing,Hu Jin
Seed germination is a complex process controlled by various mechanisms. To examine the potential contribution of reactive oxygen species (ROS) and gibberellin acid (GA) in regulating seed germination, diphenylene iodonium chloride (DPI) and uniconazole (Uni), as hydrogen peroxide (H2O2) and GA synthesis inhibitor, respectively, were exogenously applied on tobacco seeds using the seed priming method. Seed priming with DPI or Uni decreased germination percentage as compared with priming with H2O, especially the DPI + Uni combination. H2O2 and GA completely reversed the inhibition caused by DPI or Uni. The germination percentages with H2O2 + Uni and GA + DPI combinations kept the same level as with H2O. Meanwhile, GA or H2O2 increased GA content and deceased ABA content through corresponding gene expressions involving homeostasis and signal transduction. In addition, the activation of storage reserve mobilization and the enhancement of soluble sugar content and isocitrate lyase (ICL) activity were also induced by GA or H2O2. These results strongly suggested that H2O2 and GA were essential for tobacco seed germination and by downregulating the ABA/GA ratio and inducing reserve composition mobilization mutually promoted seed germination. Meanwhile, ICL activity was jointly enhanced by a lower ABA/GA ratio and a higher ROS concentration.
研究领域:
植物生理学
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分子生物学
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植物学
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PubMed
高影响因子
Nanoscale Research Letters
·
2018
·Vol. 13
·期 1
·1-10
·
IF 3.125
Lan Lifang,Li Sheng,Li Jun,Lu Lu,Lu Yan,Huang Si,Xu Shuaijun,Pan Chunyang,Zhao Fenghua
A sol-gel method was adopted to obtain LiNi 0.5-x Ga x Mn 1.5 O 4 ( x = 0, 0.04, 0.06, 0.08, 0.1) samples. The effect of Ga doping on LiNi 0.5 Mn 1.5 O 4 and its optimum content were investigated, and the electrochemical properties at room temperature and at a high temperature were discussed. The structural, morphological, and vibrational features of LiNi 0.5-x Ga x Mn 1.5 O 4 ( x = 0, 0.04, 0.06, 0.08, 0.1) compounds were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FT-IR). The XRD results demonstrate that all samples have a disordered spinel structure with a space group of Fd3m, and Ga doping restrains the formation of the Li x Ni 1-x O secondary phase. FT-IR analysis reveals that Ga doping increases the degree of cation disorder. The SEM results reveal that all samples possess a fine spinel octahedron crystal. The electrochemical performance of the samples was investigated by galvanostatic charge/discharge tests, dQ/dV plots, and electrochemical impedance spectroscopy (EIS). The LiNi 0.44 Ga 0.06 Mn 1.5 O 4 sample with the optimum content shows a superior rate performance and cycle stability after Ga doping, especially at a high discharge rate and high temperature. In addition, the LiNi 0.44 Ga 0.06 Mn 1.5 O 4 sample retained 98.3% of its initial capacity of 115.7 mAhg −1 at the 3 C discharge rate after 100 cycles, whereas the pristine sample delivered a discharge capacity of 87.3 mAhg −1 at 3 C with a capacity retention of 80% at the 100th cycle. Compared with the pristine material, the LiNi 0.44 Ga 0.06 Mn 1.5 O 4 sample showed a high capacity retention from 74 to 98.4% after 50 cycles at a 1 C discharge rate and 55 °C.
研究领域:
材料科学
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电化学
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DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2026
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IF 5.2
Abdelazeem S. Eltaweil,Nouf Al Harby,Mervette El Batouti,GopiKrishna Pasam,Mazin Al Kitani,Eman M. Abd El-Monaem
In this study, the adsorption capability of green algae-derived biochar was enhanced by integrating with iron sulfide, creating the FeS 0.66 @GA-BC 0.33 composite. The magnetic FeS 0.66 @GA-BC 0.33 composite exhibited excellent adsorption performance toward Cr(VI) with a maximal adsorption capacity of 423.73 mg/g. Surprisingly, the FeS 0.66 @GA-BC 0.33 composite showed fast adsorption, with an equilibrium time of 60 minutes. Furthermore, batch experiments showed that the maximum removal efficiency of Cr(VI) by FeS 0.66 @GA-BC 0.33 was 92.39% at pH 3, 20 °C, and an adsorbent dose of 0.01 g. The kinetic analysis indicated that the pseudo-second-order model best described the adsorption process, while the isotherm results showed good agreement with both the Langmuir and Freundlich models. A combination of response surface methodology (RSM) and Box–Behnken design (BBD) was used to optimize the adsorption of Cr(VI) onto FeS 0.66 @GA-BC 0.33 . The independent variables were adsorbent dose (5–30 mg), initial Cr(VI) concentration (50–300 mg/L), and contact time (1–120 min). Analysis of variance (ANOVA) showed that the maximum removal efficiency reached 99.09% at an adsorbent dose of 17.5 mg, an initial Cr(VI) concentration of 50 mg/L, and a contact time of 120 min. The Cr(VI) adsorption mechanism was proposed based on the X-ray photoelectron spectroscopy spectra of fresh and used FeS 0.66 @GA-BC 0.33 composites, suggesting the governing reduction reaction, electrostatic interaction, and coordination bond pathways on the adsorption of Cr(VI).
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高影响因子
PLANT PHYSIOLOGY AND BIOCHEMISTRY
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2026
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IF 6.2
Su Li,Qi Jiang,Yong Qiang Gao,Ren Fang Shen,Qing Song Zheng,Xiao Fang Zhu
Aluminum (Al) toxicity in acidic soils significantly limits crop productivity by inhibiting root growth and nutrient uptake. Brassinosteroid (BR), a key plant hormone, has emerged as a crucial regulator of stress tolerance. This study investigates the role of BR in mitigating Al toxicity in rice ( Oryza sativa ) and explores the interplay between BR and gibberellic acid (GA) under Al stress. Our results show that Al stress rapidly elevates endogenous BR level in rice roots, which alleviates Al-induced root growth inhibition. Specifically, 0.01 μM BR achieves a maximum remission rate of approximately 20% for Al-induced root growth inhibition. BR application significantly reduced Al accumulation in root tips (by approximately 25%) and cell walls, particularly by inhibiting the overexpression of XYLOGLUCAN ENDO TRANSHYDROLASE/GLUCOSYLASE 5/9/11/19 ( OsXTH5/9/11/19 ), which reduces Al binding in hemicellulose fractions and upregulating Cellulose synthase A catalytic subunit 4/7/9 ( OsCesA4/7/9 ) to enhance cell wall’s barrier function against Al. BR also modulates hemicellulose composition and suppresses the expression of the Al transporter gene Nramp aluminum transporter 1 ( OsNRAT1 ), thereby reducing Al uptake into root tip cells. Additionally, BR mitigates Al toxicity via the GSK3/SHAGGY-Like KINASE 2 ( OsGSK2 )-mediated BR signaling pathway: OsGSK2 overexpression lines ( OsGSK2-OE ) exhibit enhanced Al resistance, while RNAi lines ( OsGSK2-RNAi ) show increased Al sensitivity. Furthermore, BR upregulates key expansin genes ALPHA-EXPANSIN 1/4/7 ( OsEXPA1/4/7 ) and BETA-EXPANSIN 2 ( OsEXPB2 ), which promotes root growth under Al stress. Notably, under Al stress, BR enhances endogenous GA levels through the transcription factor BRASSINAZOLE RESISTANT 1 ( OsBZR1 ): Al represses OsBZR1 expression, which is rescued by BR treatment. This process involves upregulating GA biosynthetic genes such as OsGA20OX , restoring Al-suppressed gene expression, and mitigating Al-induced OsGA2OX overexpression to maintain GA homeostasis. Exogenous GA treatment mimics BR’s alleviatory effects, highlighting critical crosstalk between the BR and GA pathways. This study provides novel insights into BR-mediated Al detoxification, revealing a key BR-GA interaction that enhances Al tolerance in rice and offers potential for improving crop resilience in acidic soils.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2025
·
IF 4.7
Rui Geng,Xianjun Niu,Yajie Liu
HZSM-5 zeolite is extensively used in methanol-to-aromatics (MTA) reactions; however, its low aromatics selectivity limits its performance due to weak intrinsic aromatization ability. In this study, a series of bifunctional x -Ga 2 O 3 /HZSM-5 were synthesized by mechanically mixing different Ga 2 O 3 isomers with HZSM-5 to systematically investigate the influence of the crystal structure on methanol aromatization. Among them, β-Ga 2 O 3 /HZSM-5 catalyst exhibited the highest aromatic selectivity, reaching 40 mol%. Structural characterization by XRD, N 2 adsorption, XPS, H 2 -TPR, XANES, and EXAFS analyses revealed that the dispersion and reducibility of extra-framework Ga 3+ species varied with the Ga 2 O 3 structure. In particular, the monoclinic β-Ga 2 O 3 exhibited a pronounced interaction with Brønsted acid sites of HZSM-5, promoting the formation of highly active and stable four-coordinated [Ga 2 O 2 ] 2+ dimers. These species functioned as efficient dehydrogenation and cyclization centers, thereby markedly promoting aromatics production.
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高影响因子
Nanoscale
·
2025
·
IF 5.1
Chuangxin Zhou,Zhiheng Zhang,Yuan Gao,Weize Diao,Siyi Zou,Jun Zhu,Jiangtao Xu,Guozhen Liu
Surface modification of Eutectic Gallium Indium (EGaIn) to inhibit oxidation has been a long-lasting challenge in material science, with limited research reporting the formation of a covalent bond between Ga and modifiers for stability purposes. Taking advantage of strong reductive property of EGaIn, this study developed a simple method for spontaneous reduction of aryldiazonium salts on EGaIn nanoparticle surface to form stable covalent Ga-C sigma bonds, effectively suppressing surface oxidation.Comprehensive characterization confirmed the formation of the covalent Ga-C bond rather than Ga-N=N-C bonds on the EGaIn nanoparticle surface. Approximately 20% of Ga(0) in EGaIn forms Ga-C bonds. Notably, the short chain aryl modified EGaIn nanoparticles exhibited high stability and negligible surface oxidation. This straightforward strategy for preparing stable aryl modified EGaIn nanoparticles allows the introduction of a range of ligands on the EGaIn nanoparticle surfaces, offering promising opportunities for diverse applications across multiple fields.
研究领域:
材料科学
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纳米科技
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表面化学
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生物材料
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药物递送
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Shuyang Shi,Chen Yang,Baozhong Ma,Hui Yang,Zhihe Cao,Yubo Liu,Yongqiang Chen,Chengyan Wang
Ga exhibits enrichment in coal-based solid waste, establishing it as a promising alternative source for Ga recovery. The HNO 3 pressure leaching process effectively achieves simultaneous leaching of Al and Ga while retaining most of the Fe in the residue. However, separating Ga from acidic solutions containing Fe and Al remains a persistent challenge in hydrometallurgy due to their similar physicochemical properties. Herein, a simplified and effective two-stage sequential solvent extraction process using acid phosphorus extractants (P507 and P204) for selective Ga recovery was proposed. Under optimized conditions, P507 removed 97.2 % of Fe from coal gangue HNO 3 leach liquor with limited co-extraction of Ga (10.1 %) and Al (5.7 %). Subsequent P204 extraction recovered 99.2 % Ga with only 9.1 % Al co-extraction from the Fe raffinate. Stripping with 2 mol·L –1 H 2 SO 4 yielded 88.0 % Ga recovery, with the extractants showing excellent regeneration and cycling performance. Mechanistic studies including FT-IR, UV-Vis, ESI-MS, and stoichiometric analysis confirmed coordination through both P = O and P–O–H groups, forming Fe(HA)A 3 and Ga(HL)L 3 complexes (A = P507; L = P204 ligands), respectively. This study presents a highly efficient approach for the separation of Fe/Ga/Al and Ga recovery from HNO 3 leach liquor, featuring exceptionally low acid depletion.
研究领域:
湿法冶金
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溶剂萃取
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资源回收
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无机化学
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环境工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）