JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xin Zhang,Langyue Pan,Aimin Liu,Zhongning Shi
The effect of the AlCl 3 content on the solubility, conductivity, ionic structure, and electrochemical behavior of Al in the 1,3-Dimethyl-2-imidazolidinone-aluminum chloride (DMI-AlCl 3 ) electrolyte system was studied. The results indicate that when the molar ratio of AlCl 3 to DMI is less than 1.0, there are anions [AlCl 4 ] − , cations [AlCl 2 (DMI) 4 ] + , and neutral molecules [AlCl 3 (DMI) 2 ] in the system. When the molar ratio is greater than 1.0, [AlCl 4 ] − will react with AlCl 3 and form [Al 2 Cl 7 ] − . As the molar ratio increases, the conductivity of the system gradually decreases, the concentration of [Al 2 Cl 7 ] − ion increases and under the same conditions, the electrodeposited products increase. After adding MgCl 2 in the DMI-AlCl 3 ( x = 1.6) system, the structure of aluminum ions in the system will change, and magnesium exists in the form of [MgCl(DMI) 4 ] + . The cyclic voltammetry and square wave voltammetry results show that the electrochemical reduction of aluminum and magnesium is controlled by diffusion. The XRD and XPS results indicate that magnesium exists in the form of Al 12 Mg 17 in the deposits, with a content of approximately 6.4 wt%.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2021
·
IF 2.917
Ai-min LIU,Yu YAO,Meng-xia GUO,Yu-bao LIU,Zhong-ning SHI,Feng-guo LIU,Xian-wei HU,Wen-cai HE,Zhao-wen WANG
The density, conductivity, and viscosity of the 1,3-dimethyl-2-imidazolinone and lithium nitrate (DMI– LiNO 3 ) solvated ionic liquid were measured as a function of temperature. Additionally, the electrochemical mechanism and electrodeposition of neodymium from the DMI–LiNO 3 solvated ionic liquid were investigated. Cyclic voltammetry results indicate that the electrochemical reduction of Nd(III) is irreversible and proceeds via one-step with three-electron transfer, which is controlled by diffusion with a diffusion coefficient of 5.08×10 −8 cm 2 /s. Energy- dispersive X-ray spectrometry and X-ray photoelectron spectroscopy data confirm that the electrodeposit obtained after electrodeposition at −4 V (vs Ag) using the DMI–LiNO 3 –Nd(CF 3 SO 3 ) 3 solvated ionic liquid contains metallic neodymium.
研究领域:
电化学
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材料科学
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 3
·640
·
IF 4.2
Maoqing Chai,Guangqiang Xu,Rulin Yang,Hongguang Sun,Qinggang Wang
The accumulation of waste plastics has a severe impact on the environment, and therefore, the development of efficient chemical recycling methods has become an extremely important task. In this regard, a new strategy of degradation product-promoted depolymerization process was proposed. UsingN,N′-dimethyl-ethylenediamine (DMEDA) as a depolymerization reagent, an efficient chemical recycling of poly(bisphenol A carbonate) (BPA-PC or PC) material was achieved under mild conditions. The degradation product 1,3-dimethyl-2-imidazolidinone (DMI) was proven to be a critical factor in facilitating the depolymerization process. This strategy does not require catalysts or auxiliary solvents, making it a truly green process. This method improves the recycling efficiency of PC and promotes the development of plastic reutilization.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHEMISTRY
·
2022
·Vol. 90
·期 2
·027006-027006
·
IF 1.777
Aimin LIU,Mengxia GUO,Yubao LIU,Fengguo LIU,Xianwei HU,Zhongning SHI
In this work, the Zn–Ta coating was electrodeposited from DMI–ZnCl2–TaCl5 solvate ionic liquid. The electrochemical reaction was studied by cyclic voltammetry using titanium as working electrode. The onset potential of zinc and tantalum co-deposition was −0.7 V (vs. Ag). Moreover, potentiostatic electrodeposition experiments were conducted to investigate the influence of potential and temperature on the morphology of the coating. X-ray photoelectron spectroscopy analysis confirmed that the coating obtained by electrodeposition at −1.6 V (vs. Ag) and 353 K was composed of Zn, Ta, ZnO, and Ta2O5. The mass fraction of element tantalum was 6.21 %, and metallic tantalum accounted for 11.54 % of the mass of element tantalum. The corrosion current density of the Zn–Ta coating was 1.83 × 10−4 A cm−2.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2024
·
IF 4.7
Xiao-qing LU,Ai-min LIU,Feng-guo LIU,Xian-wei HU,Zhong-ning SHI
The feasibility and reaction mechanism of NdFeB film electrodeposition in 1,3-dimethyl-2-imidazolidinone (DMI)−LiNO 3 ionic liquid analogs at room temperature were investigated. Cyclic voltammetry indicated that the reduction peak at −1.83 V (vs Ag) was related to the reduction of Fe(II) to Fe, while the reduction peak at −2.01 V (vs Ag) was related to the reduction of B(III) to B. The electrochemical reduction reaction of Fe(II) and B(III) were irreversible processes controlled by diffusion, and the diffusion coefficients of Fe(II) and B(III) at 313 K were 3.03×10 −6 and 6.74×10 −7 cm 2 /s, respectively. In addition, XRD analysis suggested that the product obtained by the electrodeposition in DMI−LiNO 3 −Nd(CF 3 SO 3 ) 3 −FeCl 2 −H 3 BO 3 ionic liquid analogs for 2 h on the Al substrate contained NdFe 3 B 3 . SEM and EDS analysis showed that Nd, Fe, and B in the cathode product were uniformly distributed. XPS analysis revealed that the mass fractions of Nd, Fe, and B on the W substrate were 27.44%, 27.90%, and 7.51%, respectively.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2017
·
IF 1.174
Chunyuan Wu,Youwei Cheng,Lijun Wang,Xi Li
The binary solid–liquid equilibrium of Dimethyl Terephthalate (DMT), Dimethyl Isophthalate (DMI) and Dimethyl Phthalate (DMP) was investigated by experiment and differential scanning calorimetry (DSC). The result demonstrated DMT/DMI and DMT/DMP systems are eutectic while DMI/DMP is a solid-solution system. The eutectic temperature of DMT/DMI system is 336.7 K and that of DMT/DMP is 271.1 K. Furthermore, a classical solid–liquid phase equilibrium model was used to fit the experimental data of the eutectic systems of DMT/DMI and DMT/DMP and the theoretical model could describe the eutectic solid–liquid phase diagrams properly.
研究领域:
化学工程
·
热力学
·
分离过程
·
材料科学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2020
·
IF 7.864
Chenkai Jiang,Han Chen,Junliang Wang,Yao Shen,Jiexu Ye,Shihan Zhang,Lidong Wang,Jianmeng Chen
A biphasic solvent features high absorption capacity and low heat duty for CO2 capture. Phase separation behavior is essential to cut down energy penalty. Four phase splitting agents with different hydrophobicities, such as 1,3-dimethyl-2-imidazolidinone (DMI), 1-methyl-2-pyrrolidinone (NMP), N,N-dimethylformamide, and sulfolane, were dosed to biphasic solvents, triethylenetetramine and 2-(diethylamino)ethanol. Experimental results revealed that they can tune the phase separation behavior during CO2 absorption. Generally, under the same CO2 loading, the volume ratio of the rich phase increased with their hydrophobicity (log P), which accounts for over 50%. Moreover, their influences on absorption capacity, kinetics, and thermodynamics were also investigated. After dosing NMP, the heat duty was decreased by 22%. Furthermore, a phase splitting agent with a positive log P was more conducive to reducing the heat duty, and one with a negative log P enhanced the absorption rate. With DMI, the absorption rate was 114% higher than that of MEA at rich loading. The 13C NMR analysis showed that the agents were not involved in CO2 absorption and did not affect the reaction mechanism. Furthermore, quantum calculation was used to verify the reaction mechanism, confirming that the phase splitting agent increases the reaction equilibrium constant and makes it proceed more thoroughly.
研究领域:
化学工程
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）