Journal of Materials Chemistry A
·
2013
·Vol. 1
·期 16
·5031-5036
·
IF 0
Chu Liang,Yongfeng Liu,Mingxia Gao,Hongge Pan
In this paper, we report a KOH-doped Mg(NH2)2–2LiH system with low operating temperatures and good cycling stability. The Mg(NH2)2–2LiH–0.07KOH sample can reversibly desorb/absorb ∼4.92 wt% hydrogen with a starting and peak dehydrogenation temperature of ∼75 °C and ∼120 °C, respectively, the lowest in the current Mg(NH2)2–2LiH system studied. Moreover, the cycling stability of de-/hydrogenation is also remarkably improved by KOH doping as the average capacity degradation of the Mg(NH2)2–2LiH–0.07KOH system is of only 0.002 wt% per cycle within 30 cycles. Detailed structural investigations reveal that during ball milling, the doped KOH can react with Mg(NH2)2 and LiH to convert to MgO, KH and Li2K(NH2)3, which work together to provide the synergistic effects of thermodynamics and kinetics on hydrogen desorption and absorption of the Mg(NH2)2–2LiH system upon heating, consequently inducing a significant improvement in hydrogen storage properties.
✓ 已验证
DOI
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
·
2024
·
IF 1.8
Jia-Yue Wang,Chen Yan,Han Sen-Jian,Guo Ya-Fei,Wang Shi-Qiang
To achieve efficient separation of alkali metal borate resources from the brines of the salt lake to provide a theoretical basis, this paper adopts the isothermal dissolution equilibrium method to study the solid-liquid phase equilibrium and phase diagram of the ternary system (LiB 5 O 8 + KB 5 O 8 + H 2 O) and (LiB 5 O 8 + NaB 5 O 8 + H 2 O) at 288.15 K. The study grasps the changing law of solubility and physicochemical properties of the system, as well as analyses and identifies the solid phase in stable equilibrium. The results show that the stable phase diagrams of the two ternary systems at 288.15 K are of the simple eutectic type, containing one invariant point, two univariate saturated solubility curves, and two crystalline regions. Among them, the crystalline region of LiB 5 O 8 ·5H 2 O is the smallest, indicating that it is not easy to precipitate from the saturated liquid phase, and the density and refractive index curves of each system show regular changes with the increase of LiB 5 O 8 content.
✓ 已验证
产品关联
DOI
高影响因子
INFLAMMATION RESEARCH
·
2023
·
IF 6.7
He Ze-Hui,Zou Jing-Tao,Chen Xia,Gong Jiang-Shan,Chen Ya,Jin Ling,Liu Yi-Wei,Rao Shan-Shan,Yin Hao,Tan Yi-Juan,Wang Zun,Du Wei,Li Hong-Ming,Qian Yu-Xuan,Wang Zhen-Xing,Wang Yi-Yi,Wan Teng-Fei,Luo Yi,Zhu Hao,Chen Chun-Yuan,Xie Hui
Objective Nanoparticles (NPs) hold a great promise in combating rheumatoid arthritis, but are often compromised by their toxicities because the currently used NPs are usually synthesized by chemical methods. Our group has previously fabricated Ångstrom-scale silver particles (AgÅPs) and demonstrated the anti-tumor and anti-sepsis efficacy of fructose-coated AgÅPs (F-AgÅPs). This study aimed to uncover the efficacy and mechanisms of F-AgÅPs for arthritis therapy. Methods We evaluated the efficacy of F-AgÅPs in collagen-induced arthritis (CIA) mice. We also compared the capacities of F-AgÅPs, the commercial AgNPs, and the clinical drug methotrexate (MTX) in protecting against K/BxN serum-transfer arthritis (STA) mice. Moreover, we evaluated the effects of F-AgÅPs and AgNPs on inflammation, osteoclast formation, synoviocytes migration, and matrix metalloproteinases (MMPs) production in vitro and in vivo. Meanwhile, the toxicities of F-AgÅPs and AgNPs in vitro and in vivo were also tested. Results F-AgÅPs significantly prevented bone erosion, synovitis, and cartilage damage, attenuated rheumatic pain, and improved the impaired motor function in mouse models of CIA or STA, the anti-rheumatic effects of which were comparable or stronger than AgNPs and MTX. Further studies revealed that F-AgÅPs exhibited similar or greater inhibitory abilities than AgNPs to suppress inflammation, osteoclast formation, synoviocytes migration, and MMPs production. No obvious toxicities were observed in vitro and in vivo after F-AgÅPs treatment. Conclusions F-AgÅPs can effectively alleviate arthritis without notable toxicities and their anti-arthritic effects are associated with the inhibition of inflammation, osteoclastogenesis, synoviocytes migration, and MMPs production. Our study suggests the prospect of F-AgÅPs as an efficient and low-toxicity agent for arthritis therapy.
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Renjie Xu,Ganbing Yao
The equilibrium solubility of 8-isoquinolinamine in methanol, ethanol, n-propanol, isopropanol, N,N-dimethylformamide (DMF), acetonitrile, acetone, propylene glycol (PG), ethylene glycol (EG), and water, and aqueous mixtures of methanol/ethanol/n-propanol/isopropanol plus water was experimentally measured by the isothermal saturation method at 278.15–323.15 K under 101.2 kPa. The mole fractions of 8-isoquinolinamine in monosolvents were obtained to be maximum in neat DMF. For the four binary mixed solvent systems, the amount of 8-isoquinolinamine dissolved in n-propanol + water is more than that in the other three systems. The mole fractions of 8-isoquinolinamine in pure solvents were correlated using the Apelblat model, van’t Hoff model, and Wilson model, and the calculated value of the Apelblat model was the closest to the experimental value. The Jouyban–Acree model, modified Apelblat–Jouyban–Acree model, and van’t Hoff–Jouyban–Acree model were applied to calculate the solubility of 8-isoquinolinamine in the four solvent mixtures. The feedback obtained by comparing the experimental data with the calculated data is that the calculated data from the Jouyban–Acree model was relatively close to the experimental results. Solvent effects as a powerful tool can be used to estimate interactions at the molecular level, and the results showed that solvent–solvent intermolecular interactions contribute to dissolution. van’t Hoff plots are adopted as a method to show the relationship between ln(x) and 1/T.
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Lili Zhang,Yingmin Yu,Zhaohui Liao,Xiaosheng Xu,Xin Huang,Bing Jia,Qingsong Li
Liquid–liquid equilibrium data (LLE) of ternary systems {water + 1-butanol + 1-hexanol} and {water + 1-butanol + 1-octanol} were investigated at 303.15, 313.15, and 323.15 K at 101.3 kPa. The distribution coefficient (D) and selectivity factor (S) were calculated from experimental LLE data. Meanwhile, the effect of temperature on the two-phase zone of the two systems was discussed. The nonrandom two liquid and universal quasi-chemical activity coefficient models were used to regress experimental data sets and generate the relevant binary interaction parameters. Both thermodynamic models provided similar good descriptions for the studied systems with root mean square deviations between the calculated and experimental values less than 0.3%.
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2018
·
IF 2.196
Bing Jia,Liping Wang,Mengmeng Yan,Hai Liu,Yingmin Yu,Qingsong Li
Liquid–liquid equilibrium (LLE) data for ternary systems of water + 2,2,3,3-tetrafluoro-1-propanol + anisole/1-octanol were determined at temperatures of 298.2, 308.2, and 318.2 K under 101.3 kPa. The distribution coefficients and separation factors were calculated from experimental LLE data, which indicated that anisole/1-octanol extracted 2,2,3,3-tetrafluoro-1-propanol from aqueous solution with high efficiency. The consistency of the experimental LLE data was assessed by the Othmer–Tobias and Hand equations. Meanwhile, the NRTL and UNIQUAC models were successfully applied to regress and correlate the experimental data, presenting the root-mean-square deviations (RMSD) less than 1.0%. The relevant binary interaction parameters of these two models were also regressed.
✓ 已验证
DOI
高影响因子
Science China-Chemistry
·
2014
·Vol. 57
·期 5
·662-668
·
IF 1.516
Chai YunFeng,Pan YuanJiang
Protonation and alkali-metal cation adduction are the most important ionization processes in soft-ionization mass spectrometry. Studies on the fragmentation mechanism of protonated and alkali-metal-cationized compounds in tandem mass spectrometry are essential and helpful for structural analysis. In some cases, it was often observed that a compound attached by different alkali-metal cations (or proton) exhibits similar fragmentation patterns but the relative abundances of product ions are different. This difference was considered to derive from the different electrostatic interactions of alkali-metal cations (or the bonded effect of proton) with the analyte. The alkali-metal cation with a smaller ionic radius shows stronger electrostatic interaction with the molecule because of its higher charge density. In addition, the bonded effect of the proton is stronger than the electrostatic interaction of the alkali-metal cation. In the present study, which used McLafferty-type rearrangements of even-electron ions ([M + Cat] + , Cat = H, Li, Na, K) as model reactions, the effect of cation size in mass spectrometric fragmentation reactions is highlighted. These considerations were also successfully applied to interpret the similar but distinct fragmentation behavior of proton and alkali-metal cation adducts of a synthetic compound (2-(acetamido(phenyl)methyl)-3-oxobutanoate) and a drug (entecavir).
✓ 已验证
DOI
高影响因子
Optoelectronics Letters
·
2017
·Vol. 13
·期 4
·291-294
·
IF 0
Wang Shuo,Ma Rui-xin,Wang Cheng-yan,Li Shi-na,Wang Hua
Quaternary chalcogenide Cu 2 FeSnS 4 (CFTS) nanoparticles, as a kind of potential absorber layer material in thin film solar cells (TFSCs), were successfully synthesized by using a convenient solvothermal method. Alkali element K is incorporated into CFTS thin films in order to further improve the surface morphology and the optical properties of related films. X-ray diffraction (XRD), Raman spectroscopy and field emission scanning electron microscopy (FESEM) were used to characterize the phase purity, morphology and composition of CFTS particles and thin films. The results show that the particle elemental ratios of Cu/(Fe+Sn) and Fe/Sn are 1.2 and 0.9, respectively, which are close to the characteristics of stoichiometric CFTS. The band gaps of CFTS films before and after doping K ions are estimated to be 1.44 eV and 1.4 eV with an error of ±0.02 eV.
✓ 已验证
DOI
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jiajia Ye,Guang Xia,Xuting Li,Zhiqiang Zheng,Zhanghua Fu,Qingshuai Zhang,Cheng Hu
The Ni 2 P anode own high theoretical capacity but still suffer from big volume expansion thus resulting sluggish electrochemical kinetics in K-ion batteries. Herein, we design and synthesize the urchin-like Ni 2 P yolk-shell microspheres encapsulated into N-doped carbon shells (Ni 2 P@N-C) for the first time through one-step hydrothermal followed a phosphidation/carbonization process. The unique urchin-like morphology provides fast charge transfers to the active sites for improved K-ion storage at high current densities. The yolk-shell structure couples with the nitrogen-doping carbon layer to effectively relieve the volume expansions while enhancing the conductivity of the whole anode composite. As a result, Ni 2 P@N-C electrode delivers an ultrahigh capacity of 172.6 mAh g −1 at 2000 mA g −1 after long time of 3000 cycles and shows outstanding rate performance of 136.6 mAh g −1 at 5000 mA g −1 . Lastly, ex situ X-ray diffraction analysis of K + ion insertion/extraction into/from the Ni 2 P@N-C electrode shows that potassium ion storage mechanism was to be Ni 2 P + 3K + +3e - ↔K 3 P + 2Ni.
✓ 已验证
DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2022
·Vol. 147
·期 17
·9725-9735
·
IF 4.755
Huang Zhen,Gao Na,Liu Ming,Lin Yan,Chang Guozhang,Deng Lisheng,Huang Hongyu
This study uses K-modified copper slag as an oxygen carrier (OC) candidate to examine the characteristics of Chemical Looping Gasification (CLG) of high nitrogen wood waste (HNWW) and investigated the emissions of nitrogenous pollutants (NH 3 /HCN). K modification significantly improves the reactivity of original copper slag because some new species were generated. The calcined copper slag loaded with 10 mass% K (10 K-CS) has relatively higher performance, thus, it was selected as an OC in the CLG of HNWW. The presence of 10 K-CS significantly promotes the conversion of HNWW, especially the char conversion. A suitable HNWW to 10 K-CS mass ratio was determined as 3:7. The OC not only promotes the release of nitrogen (N) in HNWW and oxidizes the reducing nitrogenous-pollutants, thus, the generated NH 3 and HCN content decrease significantly. Compared with HNWW pyrolysis, the NH 3 and HCN content decrease by 78.86% and 46.20%, respectively, at the mass ratio of HNWW to 10 K-CS of 1:10. High temperature promotes the non-gas-phase nitrogen in char/tar to be converted into the nitrogenous pollutants. A long residence time facilitates the oxidization of nitrogenous pollutants. The introduction of steam promotes the release of nitrogenous pollutants, especially NH 3 .
✓ 已验证
DOI
高影响因子
MINERALS ENGINEERING
·
2026
·
IF 6
Qiuyue Sheng,Long Li,Wenjing Feng,Zhifeng Zhao,Yonghang Luo,Yuxuan Yang,Zhanglei Zhu,Ningning Zhang,Wanzhong Yin
3-TPT is used for the efficient concentration of azurite for the first time. • 3‑TPT achieves a pronounced separation efficiency between azurite and K‑feldspar. • 3-TPT chemically adsorbs onto azurite via the formation of N Cu S C rings. The strong surface hydrophilicity of azurite leads to its low recovery, and the poor flotation separation between azurite and gangue minerals further reduces the utilization efficiency of copper. This study presents a novel selective collector 1-(3-(trifluoromethyl)phenyl)thiourea (3-TPT) for the efficient recovery of azurite from K-feldspar. Results from flotation tests and contact angle measurements indicate that with 150 mg/L 3-TPT, the contact angle of azurite surface raised to 79.4°, the recovery reaches 94.16 %, while K-feldspar remains hydrophilic, with a recovery of only 11.29 %. The selective adsorption mechanism of 3-TPT on azurite surface was revealed by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and Scanning Electron Microscope-Energy Dispersive Spectroscopy (SEM-EDS) analyses. XPS and FTIR analyses indicate that after the interaction of 3-TPT with the azurite surface, the C N stretching in 3-TPT exhibits a notable shift, and changes in the chemical states of Cu and S are observed during adsorption, confirming that 3-TPT chemically adsorbs onto azurite via the formation of N Cu S C rings, whereas its adsorption on K-feldspar is negligible. SEM-EDS results further confirm the selective interaction of 3-TPT on azurite surface, as evidenced by changes in surface morphology and elemental analysis. Characteristic elements S, N, and F from 3-TPT were clearly detected on the azurite surface in EDS mapping. This research highlights the potential of 3-TPT in copper concentration, not only improving the recovery efficiency of copper resources but also contributing to the advancement of more environmentally friendly direct flotation practices for copper oxide minerals. Download: Download high-res image (251KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLUTION CHEMISTRY
·
2026
·
IF 1.3
Bo Zhenhai,Han Mai,Wu Mingjing,Li Xia,Zheng Meng
Furfuryl alcohol is a significant fine chemical; however, its industrial separation from aqueous by-products remains a challenge. To address the lack of thermodynamic data, this study reports liquid–liquid equilibrium data for ternary systems containing water, furfuryl alcohol, and extractants (benzyl alcohol or 1-hexanol) at 303.2, 313.2, and 323.2 K. The extraction efficiency was evaluated by the distribution coefficient ( D ) and selectivity coefficient ( S ), with the highest D value reaching 7.28 and the highest S value reaching 103.42, indicating that both solvents exhibit excellent potential for separating furfuryl alcohol from water. Furthermore, the experimental data were correlated using NRTL and UNIQUAC models. The root mean square deviation values were less than 0.64 and 0.55%, respectively, confirming the reliability of the binary interaction parameters calculated via relevant software.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）