CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Quanqing Han,Xin Gao,Heng Zhang,Keli Chen,Lincai Peng,Qingmin Jia
In this study, cellulosic fines were separated from corn stalk soda-anthraquinone (AQ) pulp, then dissolved in DMAc/LiCl solvent system and regenerated to form films. Pulp fines was separated from pulp fibers using different standard sieves. The results exhibited that the value of specific surface area for fines was increased with the reduction of particle size. The cellulose of fines was successfully dissolved in DMAc/LiCl solution and regenerated as biopolymeric films in the water bath. Mechanical properties of regenerated cellulose films were enhanced with the increase of raw-material fineness from 120 to 300 mesh. It was exhibited a remarkable decrease on the values of tensile strength and maximum decomposition temperature of the regenerated cellulose film from 500-mesh fines, indicating that too small dimensions of cellulosic particles took disadvantages on physical strength and thermostability.
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2025
·Vol. 27
·期 47
·15236-15248
·
IF 9.2
Yutao Ni,Jiahui Song,Huiying Lan,Xue Jing,Wenwen Shi,Ruimin Ding,Xi Yin
The synthesis of high-loading platinum intermetallic compounds (IMCs) for proton exchange membrane fuel cells (PEMFCs) remains challenging due to severe nanoparticle agglomeration and inhomogeneity during high-temperature annealing. Here, we report a trace lithium chloride (LiCl)-assisted strategy that enables the synthesis of highly ordered Pt3Co IMCs with ultrahigh metal loading (50.43 wt% Pt) and a small particle size (∼3.58 nm). Comprehensive characterization reveals that LiCl lowers the activation barrier for Pt/Co salt reduction by a strong polarization force, while its molten-salt phase accelerates Co diffusion into the Pt lattice and surface atomic rearrangement. The resulting Pt3Co/C catalyst achieves a record oxygen reduction reaction (ORR) mass activity (MA) of 0.86 ± 0.04 A mgpt−1 in rotating disk electrode (RDE) tests. When integrated into PEMFC cathodes, it delivers peak power densities (PPD) of 2.92 W cm−2 (H2–O2) and 1.23 W cm−2 (H2–air) at 80 °C, alongside exceptional stability. Crucially, the MA at 0.9 V reaches 0.61 A mgpt−1, surpassing the U.S. DOE 2025 target (0.44 A mgpt−1) by 39%. This work pioneers a barrier-lowering synthesis paradigm that resolves the fundamental ordering–sintering trade-off in high-temperature IMC fabrication.
研究领域:
材料科学
·
电化学
·
能量转换
·
纳米催化
·
燃料电池技术
✓ 已验证
产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2023
·
IF 8.3
Mingyong Jia,Fei Chen,Xipeng Tan,Yaling He,Yueqi Wu,Qiang Shen
The high-temperature corrosion behavior of an AlN/Mo functionally graded material (FGM) under the Li/LiF-LiCl-LiBr vapor has been investigated. It is suggested that the Li vapor diffuses along the AlN and AlN/Mo grain boundaries and enters the interior of adjacent AlN grains, leading to the disintegration of AlN grains and subsequent failures. The 3D Mo networks are barely corroded, thus preventing cracking that may occur due to the inconsistent deformation inside the FGM. This work unravels the high-temperature corrosion mechanisms for the AlN/Mo FGM. Meanwhile, the operating temperature threshold for the liquid metal batteries employing Mo/AlN/Mo seals is determined to be ∼ 600 °C.
研究领域:
材料科学
·
腐蚀科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Kai Zong,Dongshun Deng
In this study, we proposed a robust and efficient accelerator-silicic acid (SA) to support metal chlorides (MCl x ) as adsorbents for NH 3 adsorption and separation. Their structures and NH 3 adsorption performance were systematically investigated. Results revealed that SA with abundant hydroxyl group could dissociate and immobilize MCl x to realize synergistic M x + –NH 3 coordination and Cl - –NH 3 hydrogen bonding. Meanwhile, the interactions between the MCl x and SA significantly reduced the desorption energy of the adsorbent. The outstanding LiCl-3@SA composite demonstrated remarkable NH 3 adsorption capacity of 17.20 mmol NH 3 /g-adsorbents at 30 °C and 1.0 bar and adsorption enthalpy of −50.23 kJ/mol. Present work provided valuable information on deep understanding of MCl x −porous support interactions and strategy to design efficient composites for NH 3 capture.
研究领域:
化学工程
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2023
·Vol. 13
·期 9
·2203631
·
IF 27.8
Ruifeng Song,Jingming Yao,Ruonan Xu,Zhixuan Li,Xinlin Yan,Chuang Yu,Zhigao Huang,Long Zhang
A stable interface and preventing dendrite-growth are two crucial factors to realize long-life all-solid-state Li batteries (ASSLBs) using sulfide-based solid electrolytes (SEs) and Li metal anodes. But it remains a challenge to accomplish the two factors simultaneously. Here, an effective strategy is reported to realize this goal in Li-argyrodites via self-engineered metastable decomposition that is enabled by Si doping in Cl-rich argyrodites. It is shown that Cl atoms in the lattice become metastable and are highly reactive with Li atoms. The locally deposited/grown Li crystal nuclei are thus depleted by the metastable Cl during electrochemical cycling, in situ generating electrically insulated LiCl shells concentrated at the argyrodite grain boundaries. The shells in turn prevent the autochthonous Li redeposition and act as self-protective layers to restrain the continuous decomposition in the interior argyrodite, that is, self-assembly of reactive-cores-stable-shells to Li metal, thereby enabling an ultra-long life ASSLB using Li metal anodes at room temperature under relatively high current densities.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
PHYTOTHERAPY RESEARCH
·
2019
·Vol. 34
·期 4
·817-824
·
IF 3.766
Mingming Zhu,Xi Yu,Zongmei Zheng,Jiaming Huang,Xuepan Yang,Hongfei Shi
Cancer stem cells (CSCs) are considered as the origin and driving cells of cancer, and play a key role in the progress of cancer. Studies have shown that capsaicin exerted inhibitory effect on prostate cancer cells, however, the effects of capsaicin on prostate CSCs remain undefined. In the present study, we showed that capsaicin could downregulate prostate CSCs markers and inhibit the growth of PC-3 and DU145 prostate cancer stem cells. Further, we found capsaicin suppressed the expression of Wnt-2, p-GSK3β and β-catenin, along with downregulation of Wnt/β-catenin pathway target genes c-myc and cyclinD1. Using LiCl, a activator of Wnt/β-catenin pathway, we found activation of Wnt/β-catenin pathway could ameliorate the downregulation of prostate CSCs markers and the growth inhibition induced by capsaicin in prostate cancer stem cells. Those data suggested that the inhibition effect of capsaicin on prostate cancer stem cells and the anti-cancer effect of capsaicin on prostate cancer stem cell may be mediated by Wnt/β-catenin pathway. Findings from this study reveals for the first time the potential role and mechanisms of capsaicin on prostate cancer stem cells.
研究领域:
肿瘤学
·
分子生物学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 14
·142505
·
IF 3.721
Wei Han,Wenjuan Wang,Mei Li,Yangyang Meng,Wenjing Ji,Yang Sun
To recover Gd from LiCl-KCl eutectic, the coreduction mechanism of Gd(III) with Pb(II) was investigated using electrochemical methods. The formation potentials related to the formation of three Gd-Pb intermetallics were detected by cyclic voltammetry, square wave voltammetry and chronopotentiometry, and the formation mechanism of Gd-Pb compounds could be described as xPb(II) + 2xe− = xPb. Meanwhile, the electroreduction of Gd on liquid Pb electrode was explored. The diffusion coefficient of Gd metal in liquid metallic Pb was determined by anodic chronopotentiometry. The kinetic parameters of Gd(III)/Gd(in Pb) couple in the temperature range from 723 K to 873 K were determined employing linear polarization (LP) method. Based on the relationship of exchange current density and temperature, the reaction activation energy was estimated to be 23.17 kJ mol−1. In addition, the recovery of Gd from molten salts was performed assisted by liquid Pb electrode by constant potential electrolysis (CPE) and constant current electrolysis (CCE). The products characterized using XRD, SEM with EDS are comprised of GdPb3 and Pb phases. The concentration change of Gd during CCE process was monitored by ICP-AES, and the recovery rate was estimated. The results showed that Gd concentration decreased and recovery rate increased with the duration.
研究领域:
材料科学
·
电化学工程
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Xinrui Huang,Jingsong Liu,Mengshi Zeng,Xiaowei Yang,Xiaojiang Liu
In this article, the MgO imporous fibers, MgO porous fibers and hydrofluoric acid (HF) modified MgO porous fibers were researched as the electrolyte binders in Li–Si/LiCl–KCl/FeS 2 thermal batteries respectively. The results show that the wettability between the LiCl–KCl molten salt and the MgO fiber binders increases significantly in order of MgO porous fibers and HF modified MgO porous fibers. The separator pellet using the MgO porous fiber modified by 40 mol% (of the MgO fiber) HF solution as the electrolyte binder exhibits an extremely small amount of electrolyte leakages (19.6 mg cm −2 ) and the highest ionic conductivity (0.66 S cm −1 at 450 °C). Meanwhile, the corresponding thermal battery shows the largest discharge capacity (425 mA h g −1 at 1.0 V voltage plateau). Moreover, the effect of HF modification on the ion migration was analyzed based on the analysis of element diffusion and the formed MgF 2 phase. In summary, modification of MgO porous fiber binder by HF solution is a potential way to improve the performance of thermal batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Magnesium and Alloys
·
2020
·
IF 7.115
Shaolong Li,Yusi Che,Chenyao Li,Yongchun Shu,Jilin He,Bin Yang,Jianxun Song
The electrochemical behavior of Mg 2+ and Al 3+ in LiCl-KCl (mass 4: 1) melt at 973 K was studied on a Mo electrode systematically by cyclic voltammetry, square wave voltammetry and chronopotentiometry. The results showed that the reductions of Mg 2+ and Al 3+ were reversible processes controlled by the rate of the mass transfer. When Mg 2+ and Al 3+ coexisted in LiCl-KCl melt, they had no significant effect on the reduction potential of each other. The equilibrium potentials of Mg 2+ /Mg and Al 3+ /Al were obtained by open circuit potential method. Their apparent standard potentials were also calculated in this system and the values were −2.52 V vs Cl 2 /Cl − , −1.66 V vs Cl 2 /Cl − , respectively. Correspondingly, the apparent Gibbs free energies of Mg 2+ /Mg and Al 3+ /Al were −485.71 kJ/mol, −480.78 kJ/mol. Finally, potentiostatic electrolysis was performed on a Mo electrode in LiCl-KCl-MgCl 2 -AlCl 3 (the mass ratio of MgCl 2 to AlCl 3 was 10:1) melt at different potentials. The components of the deposits were characterized by scanning electron microscope and energy dispersive spectroscopy. The study revealed that the content of Al in the deposit decreased as the overpotential increased and Al tended to segregate at the grain boundaries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Junjian Niu,Wenjun Yan,Xiaoyuan Song,Wangwang Ji,Zhongde Wang,Xiaogang Hao,Guoqing Guan
Various electrochemical separation methods have been investigated for the recovery of lithium to satisfy the global demand for lithium. However, most of them are still greatly limited by high energy consumption and deficient selectivity. To overcome these issues, in this study, an electrically switched ion exchange (ESIX) system for efficient and selective LiCl separation from brine lakes was developed based on a strategy of self-electrical-energy recuperation, in which the electric energy generated in the process of LiCl uptake was proposed to compensate the energy consumed for the desorption of ions as well as the regeneration of electrodes. λ-MnO 2 film coated electrode and BiOCl@PPy film coated electrode were fabricated to capture Li + and Cl - ions in the brine lake, respectively. In the ion uptake process, the inherent potential difference between the two electrodes was balanced due to the embeddedness of Li + and Cl - ions, which simultaneously triggered the generation of electric energy. This generated electric energy was automatically stored and provided for the desorption of the Li + and Cl - ions from the electrodes in the ion releasing process. As a result, this ESIX system featured with extremely low energy consumption (1.007 Wh for separating per mole of LiCl) and excellent selectivity with a LiCl recovery capacity of 10.88 mg/g. It is expected that such an ESIX system with self-electrical-energy recuperation could be a promising alternative to those current electrochemical techniques for the recovery of LiCl from brine lakes.
研究领域:
环境科学
·
材料科学
·
电化学工程
✓ 已验证
DOI
高影响因子
Solids
·
2025
·Vol. 6
·期 3
·53
·
IF 2.4
Chenxing Liao,Huihuang Cai,Dongyuan Dai,Liaolin Zhang
Mg2TiO4:Mn4+(MTO:Mn4+) red phosphor has important applications in areas such as red LEDs and forensic science, but the preparation of MTO:Mn4+through the solid-state reaction method requires a high sintering temperature. Herein, MTO:Mn4+red phosphor was synthesized using the solid-state reaction method with LiCl flux, and its crystallographic structure and photoluminescence properties were studied to determine the influence of experimental parameters like the amount of fluxing agent added and sintering temperature in producing a bright red phosphor suitable for LEDs. The experimental results showed that samples with added LiCl could form pure MTO after sintering at 950 °C, whereas those without LiCl still contained a mixture of MTO and MgTiO3, even when sintered at 1400 °C. The optimal performance was achieved with a sample doped with 0.2 mol% Mn4+, synthesized using 50 wt% LiCl flux and sintered at 950 °C for 12 h. This sample exhibited a broad excitation band and a narrow red emission band peaking at 662 nm, confirming its excellent luminescence properties. Furthermore, a prototype red LED fabricated with a 377 nm chip and MTO:0.2% Mn4+phosphor achieved photoelectric conversion efficiency of 78.5% at a 100 mA drive current, confirming its viability for high-performance red LED manufacturing.
研究领域:
材料科学
·
发光材料
·
无机化学
·
固体化学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Jinqiu Zhuo,Wenwen Lv,Zixin Li,Yaodan Cao,Bingbing Li,Yusen Huangfu,Yuchun Zhang,Jiaxu Zhang,Jie Wu
Molten salt method was effective to improve the photocatalytic performance of graphitic carbon nitride (CN). Nevertheless, various complex reactions took place in flux, leading to the complicated CN molecular structure. Therefore, besides high photoactivity, it was necessary to illustrate the structure-function relationship. Herein, CN nanosheets (CN-S) were prepared. After post-treated by LiCl molten salts, the photocatalytic H 2 O 2 rate over as-obtained CN-S-LiCl- x was dramatically increased from 22.3 to 81.4 mM·g −1 ·h −1 , much higher than the sample post-treated by NaCl and KCl molten salts. Compared to the initial CN-S, the -C N groups, bulk N-defects and surface N-defects were controllably introduced in CN-S-LiCl- x. These critical structural factors on photocatalytic H 2 O 2 performance were quantitatively studied, and the bulk N-defects displayed the correlation of linear relationship as high as 0.945. Electrochemical tests and DFT calculation indicated bulk N-defects were served as the main O 2 adsorption sites with adsorption energy of −4.33 eV, which not only accelerated surface reaction, but also extended light harvest and improved separation efficiency of photoinduced charge carriers. In photocatalytic H 2 O 2 mechanism study, one-step two-electron reduction and two-step single-electron reduction performed simultaneously, while the latter was primary. Our work has conducted a detailed analysis on the relationship between various structural factors and H 2 O 2 yield, and identified the key role of bulk N-defects. This provides new ideas to investigate photocatalytic H 2 O 2 evolution mechanism and design efficient CN-based photocatalysts.
✓ 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）