Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-16
·
IF 36.3
Yin Chaofan,Yang Jiaming,Feng Jiangyuan,Sun Yueyue,Liu Zhengrong,Wang Junkai,Cui Jiajia,Xue Zixuan,Zhang Liang,Zhou Yucun,Zhou Jun,Xu Liangfei,Wu Kai,Li Jianqiu
La 0.3 Sr 0.6 Ti 0.1 Co 0.2 Fe 0.7 O 3− δ (LSTCF) nanofibers showed high structural reversibility.
LSTCF fibers and CoFe nanoparticles were reconstructed through a reversible phase transition process.
The LSTCF fiber electrode demonstrated excellent activity and stability for power and fuel co-generation.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Tao Yang,Houfeng Xiong,Fen Liu,Qiyong Yang,Bingjie Xu,Changchao Zhan
In the application of ultrafiltration (UF) for removal of natural organic matter (NOM) from water, membrane fouling has always been considered a big issue. The influence of UV/TiO 2 photocatalysis as pretreatment to mitigate cross-flow ceramic UF membrane fouling caused by humic acid (HA) and the involved mechanisms of fouling development were investigated. The characterization of dissolved organic carbon (DOC), specific ultraviolet absorbance (SUVA), excitation-emission matrix (EEM), molecular weight (MW), hydrophilicity, fouling resistance, scanning electron microscopy (SEM) and model fitting using Hermia blocking models were performed. The dominant membrane fouling patterns can be predicated by the initial intermediate pore blocking, transition fouling and the final stage of limited cake growth. With extended UV/TiO 2 pretreatment time, a significant reduction of cake filtration coefficients and a slight decrease in pore blocking coefficients were observed. Longer UV/TiO 2 pretreatment achieved the remarkable effect of reversible fouling elimination as a result of reaching the final stage of limited cake growth earlier and aggregation forming a porous cake layer by TiO 2 particles mixed with more hydrophilic (HPI) and high MW (>50 kDa) humic-like substances. However, photocatalytic pretreatment exhibited a slight effect on the mitigation of irreversible fouling that was mainly dominated by HPI fractions, especially tryptophan-like protein (5–50 kDa) organics attaching to and/or blocking the membrane pores.
研究领域:
环境科学
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水处理工程
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
DRUG METABOLISM AND DISPOSITION
·
2025
·
IF 4
Yue Gao,Chenghui Cai,Wanyu Zheng,Shicheng Fan,Yifei Zhang,Yanying Zhou,Huilin Li,Jie Yang,Shaoxing Guan,Huichang Bi
Constitutive androstane receptor (CAR, NR1I3), a nuclear receptor superfamily member, plays a pivotal role in liver size regulation. Murine CAR agonist TCPOBOP was reported to induce hepatomegaly in mice, accompanied by hepatocyte hypertrophy and proliferation. However, whether CAR activation-induced hepatomegaly is reversible and the histological changes during reversal process remain elusive. In the current study, C57BL/6 mice were administered TCPOBOP for 5 days and sacrificed at different time points after drug withdrawal. The results showed that TCPOBOP-induced hepatomegaly required a long time to reverse, as evidenced by the liver-to-body weight ratio in the TCPOBOP group remained significantly higher than that in the Vehicle group even 120 days after withdrawal. CTNNB1 and CCND1 staining indicated a reduction in hepatocyte size and proliferating cells. To investigate the involved mechanisms, we measured proteins associated with hepatomegaly and liver regeneration termination. The results suggested that YAP, C-MYC, CTNNB1, FOXM1 and HNF4α changed significantly after TCPOBOP withdrawal and functioned at different stages during reversal. Furthermore, we established a UPLC-MS/MS method to quantify TCPOBOP concentration. The results indicated a long-term hepatic retention of TCPOBOP, which constantly activated CAR and led to sustained hepatomegaly after TCPOBOP withdrawal. Overall, these findings revealed the reversibility of CAR activation-induced hepatomegaly and provided new insights into the safety of CAR as a drug target. Additionally, the results highlighted the importance of considering long-term TCPOBOP accumulation in the liver to avoid potential adverse effects and experimental biases.
研究领域:
药理学
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分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2011
·
IF 4.524
Pei Pei Yuan,Bin Hong Liu,Bang Jie Zhang,Zhou Peng Li
In this work, we report a new reversible hydrogen storage composite based on 6LiBH4+CaF2. It has a theoretical hydrogen capacity of 9.6 wt % (0.09 g·ml−1) and a slightly reduced thermodynamic stability compared with pure LiBH4. The dehydrogenation of 6LiBH4 + CaF2 yielded CaB6 and a solid solution of LiH and LiF that can be rehydrogenated to form LiBH4 and CaF2. The composite revealed good reversibility of hydrogen storage regardless of the hydrogen back pressure applied during the dehydrogenation. Catalysts like TiF3, CeF3, and NbCl5 were found to enhance its dehydriding kinetics. XRD and FT-IR analyses revealed that hydrogen uptake of the composite proceeded through a reaction path involving CaH2 as the main intermediate.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2013
·Vol. 1
·期 12
·3983-3991
·
IF 0
Lina Chong,Jianxin Zou,Xiaoqin Zeng,Wenjiang Ding
In this work, a reversible hydrogen storage composite, 3NaBH4/NdF3, has been prepared using a mechanical milling method. The de-/rehydrogenation properties as well as the mechanisms of reversible hydrogen sorption in the composite were carefully investigated. Based on the pressure–temperature–composition measurements, the de-/rehydrogenation enthalpies of the 3NaBH4/NdF3 composite are determined to be 86.4 kJ mol−1 H2 and −13.2 kJ mol−1 H2, respectively. The onset dehydriding temperature of the composite is determined to be 413 °C in 0.1 MPa Ar atmosphere and can be as low as 80 °C under vacuum conditions. Analyses revealed that NdB6, Nd2H5 and NaF were formed after the decomposition of the composite, which can be hydrogenated to produce NaBH4 and NaNdF4. The formation of NaNdF4 instead of NdF3 in the hydrogenated products is believed to be responsible for the reduced hydrogen storage capacity, while the intermediate formation of B, Nd and NdB4 during dehydrogenation accounts for the asymmetric hydriding/dehydriding behaviors in the 3NaBH4/NdF3 composite.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
JOURNAL OF CULTURAL HERITAGE
·
2014
·
IF 1.111
Mingyuan Sun,Jiqiang Zou,Hui Zhang,Bingjian Zhang
In this work, a new hydrogel designed for water-sensitive artifacts especially for China Dunhuang mural was synthesized to remove the ineffective conservation materials on mural surface. The reversible rate of each conservation material was measured based on hydrogel cleaning. It was found that the gel filled with cleaning agents showed excellent performance over the empty gel. Besides, it was more environment-friendly without mechanical damage to the sensitive surface and easier to control the cleaning process compared with pure organic solvent cleaning. 3D microscopic system confirmed the cleaning effects both visually and quantitatively. The best “conservation material-cleaning agent” pairs and their reversible rates were obtained, which were “ParaloidB72---P-xylene + ethyl acetate---80%”, “polyvinyl acetate---P-xylene + ethyl acetate---40%”, “acrylic---P-xylene---44%”, “silicone---P-xylene + 1-Pentanol---55%”. It was also found that the reversible rates of the conservation materials declined after aging.
研究领域:
文物保护
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2018
·
IF 3.235
Guangxia Tang,Haojie Zhu,Haoxiang Yu,Xing Cheng,Runtian Zheng,Tingting Liu,Jundong Zhang,Miao Shui,Jie Shu
With the development of science and technology, lithium ion batteries have become a representative of modern high-performance batteries due to their excellent performance. In this work, BiNbO 4 with the nanowire morphology is fabricated by a simple electrospinning method on a stainless steel mesh cage collector. Here, we demonstrate that the BiNbO 4 nanowires display a reversible capacity of 165 mAh g −1 and remarkable cycling stability at a current density of 50 mA g −1 . When cycled at 700 mA g −1 , BiNbO 4 nanowires can maintain the capacity retention of 60% after 700 cycles, revealing better cycling properties than other Bi-based anode materials. In addition, in-situ X-ray diffraction analysis suggests that BiNbO 4 nanowires have good electrochemical reversibility. BiNbO 4 is transformed into Bi nanocrystallites and Li 3 NbO 4 during the first discharge process. With the continuation of the discharge, active Bi nanocrystallites react with lithium ions to form Li 3 Bi alloys. This is a reversible process that provides reversible capacity as the reaction proceeds.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Renhui Ling,Mingxing Li,Xin Li,Laihuan Pei,Xiaoyan Luo,Congmin Wang
MOFs have high adsorption performance of ammonia (NH 3 ) because of its porosity and abundant coordination sites, especially MOFs containing carboxylic acid ligands have emerged as effect NH 3 adsorbents. But, it’s troublous for reversible ammonia adsorption for the strong metal-NH 3 coordination or the collapse of adsorbents. [MEDTA] 2- is a very stable and classic carboxylic acid-containing complex, but there was no relevant report. Therefore, this work carried out the design and synthesis of PVIm-R8-MEDTA based on the use of the coordination structure of [MEDTA] 2- and the stability of PILs’ skeleton. The characterization indicated the [MEDTA] 2- could be introduced into PILs successfully for the hydrogen bonding interactions with the imidazolium cation, and the obtained PVIm-R8-MEDTA presented enhanced NH 3 capacity (10.4–14.7 mmol/g) than their precursor PVIm-R8-Br (7.8 mmol/g). The mechanism of NH 3 adsorption was proposed by DFT calculation, spectroscopic method, and the calorimetric test, it indicated the NH 3 was fixed by imdazolium cation through hydrogen bonding and inserted into two of the carboxylate and metal bonds of [MEDTA] 2- . Because of the multi-meshing coordination of [EDTA] 4- and metal ions, the disconnected carboxylate ions could easily coordinate with metal ions again and repair the chelating structure of [MEDTA] 2- , which caused the ammonia easily be desorbed. In the process of gas adsorption, there was no bonding breakage of the skeleton of PILs, which helped the PVIm-R8-MEDTA be recovered under moisture and NH 3 atmosphere. Thanks for the designability of PILs, such as the cationic structure, structure and size of cross-linking agent, the choice of complex anion and so on, it provides a new design idea and theoretical basis for efficient and reversible ammonia adsorption materials.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2020
·
IF 3.693
Zhang Xin,Zhang Xuelian,Ren Zhuanghe,Hu Jianjiang,Gao Mingxia,Pan Hongge,Liu Yongfeng
In this paper, we report amorphous-carbon-supported TiB2 nanoparticles having sizes of 2–4 nm (nano-TiB2@C) as highly active catalysts for hydrogen storage in NaAlH4. Nano-TiB2@C was synthesized by a simple calcination at 550°C with Cp2TiCl2 and MgB2 (molar ratio of 1:1) as precursors. The addition of 7 wt% nano-TiB2@C reduced the onset dehydrogenation temperature of NaAlH4 by 100 to 75°C. A practically available hydrogen capacity of 5.04 wt% could be desorbed at 140°C within 60 min, and completely hydrogenated at 100°C within 25 min under a hydrogen pressure of 100 bar. Notably, the hydrogen capacity was almost unchanged after 20 cycles, which shows the stable cyclability, considerably higher than those of structures catalyzed by Ti halides or TiO2. The stable catalytic function was closely related to the in-situ-formed Ti–Al alloy, which considerably facilitated the dissociation and recombination of H–H and Al–H bondings.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 3
·期 8
·4493-4500
·
IF 0
Lina Chong,Jianxin Zou,Xiaoqin Zeng,Wenjiang Ding
In the present work, hydrogen sorption behaviors of some of the 3NaBH4–LnF3 (Ln = Ce, Sm, Gd and Yb) composites were investigated and the mechanisms associated with different effects of LnF3 (Ln = La, Ce, Pr, Nd, Sm, Gd, Ho, Er and Yb) on reversible hydrogen sorption in NaBH4 were proposed based on careful comparisons. The key factors controlling the properties of 3NaBH4–LnF3 can be summarized as follows: (i) electronegativity χp of Ln3+ determines the thermodynamic stability of 3NaBH4–LnF3 composites with their χp in the range of 1.23–1.54 being suitable for reversible hydrogen storage; (ii) the electronic configuration of Ln3+ influences rehydrogenation behaviors: more stable the oxidation state of the Ln3+ is, the better is the rehydrogenation performance of NaBH4; (iii) the unique crystal structure of the Ln–B phase formed during dehydrogenation, and geometrical configuration of B in Ln–B, provide dangling bonds for hydrogen atoms to embed in, consequently modifying the rehydrogenation kinetics. Because Gd3+ possesses a combination of suitable electronegativity, stable oxidation state and favorable geometric structure in GdB4, the 3NaBH4–GdF3 composite exhibits the best overall hydrogen storage properties among all the studied 3NaBH4–LnF3 composites, with high cycling stability up to 51 cycles along with fast kinetics. This understanding provides us with criterions to design new borohydride-based hydrogen storage systems and to optimize their hydrogen storage properties.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
MATERIALS CHEMISTRY AND PHYSICS
·
2016
·
IF 2.101
Feng-Fei Pang,Sen Li,Wen-Quan Sun,Guo-Zhi Han
We report the reversible conductivity and morphology modulation of PEDOT:PSS composites based on pH. Through studying effects of pH on the morphology and conductivity of PEDOT:PSS composites, it was found that different pH of PEDOT:PSS composites solution will result in different morphology of PEDOT:PSS composites film . At the same time, conductivity of the film also changed accordingly. With the increase of pH from 3 to 11, the microstructure of PEDOT:PSS film reversibly changed from a continuous network to non-continuous clusters, and the corresponding conductivity decreased from 0.62 S/cm to 0.42 S/cm. Furthermore, the mechanism was innovatively investigated by Raman spectra , along with UV–Vis spectra and SEM .
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 5
·2644-2649
·
IF 3.108
Guodong Wei,Lin Wei,Dong Wang,Yufeng Tian,Yanxue Chen,Shishen Yan,Liangmo Mei,Jun Jiao
In this report, a reversible control of Fe3O4 saturated magnetization by Li ions is demonstrated. A miniature Li ion battery (LIB) was assembled using a Fe3O4 nanoparticle layer as the active cathode. A stable magnetism modulation is realized by a nondestructive electrochemical process in which the lithium insertion results in a valence change and partial redistribution of Fe cations in the crystal structure. The relation between the discharge voltage and the chemical phases were studied by ex situ X-ray diffraction and magnetic measurement. In a suitable discharge potential range, a reversible control of Fe3O4 saturated magnetization was obtained without structural damage to the magnetic electrode. The experimental results indicate by further optimizing the LIB's performance, a large reversible change in magnetization could be realized at room temperature, suggesting the potential for future practical applications.
研究领域:
材料科学
·
物理学
✓ 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）