APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yijiang Li,Chen Chen,Wencheng Xia,Yujin Sun,Hongxin Qiu
In this study, in-situ flocculation kinetics tests, fourier transform infrared spectroscopy and DFT theoretical calculation were used to analyze flocs properties of calcite flocs under combination of sodium alginate and AlCl 3 /polyaluminum chloride (PAC) and their adsorption mechanism. The results showed that the average size of calcite flocs treated with AlCl 3 -sodium alginate was smaller than that of flocs treated with PAC-sodium alginate. The number of residual fine particles in the slurry treated with AlCl 3 -sodium alginate was more than that in the slurry treated with PAC-sodium alginate. However, the fractal dimension of calcite flocs treated with AlCl 3 -sodium alginate was larger than those treated with PAC-sodium alginate. The sodium alginate and Al 3+ could form chemical adsorption on the calcite surface. AlCl 3 has a higher content of Ala than PAC. Ala could form chemical adsorption between sodium alginate and calcite, resulting in a high strength and fractal dimension of calcite flocs. Alb and Alc was not easily able to form metal bridges between calcite and sodium alginate. The sweep effect of PAC and sodium alginate leads to the formation of large-sized flocs. This work can promote the supplication of sodium alginate as a green flocculant.
研究领域:
环境科学
·
化学工程
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Juan Zhao,Guiying Li,Qisu Hao,Yucheng Gu,Changwei Hu
Glycerol-based pretreatment enhanced the enzymatic hydrolysis efficiency of biomass. Post-reaction addition of a dilution solvent facilitated filtration of the pretreated slurry. The dilution solvent also affected the cellulose structure of the pretreated samples and the behavior/structure of lignin derivatives, which influenced the enzymatic hydrolysis efficiency of cellulose. When H 2 O was employed as the dilution solvent, the cellulose conversion of pretreated pine (with redeposited lignin derivatives) reached 76.9 % in enzymatic hydrolysis, surpassing values obtained with ethanol-diluting (29.7 %) and acetone-diluting (42.3 %) pretreated pines (without redeposited lignin derivatives). The study revealed that 1) lignin deposited during aqueous dilution acts as a steric hindrance agent, effectively preventing cellulose microfibril re-aggregation. The resultant cellulose exhibited lower crystallinity (72.2 % vs 81.7–87.9 %) and smaller crystallite size (2.48 nm vs 2.76–3.10 nm) compared to organic solvent (ethanol or acetone)-diluted pretreated pine. 2) Among the lignin derivatives derived from this system, those exhibiting higher aliphatic hydroxyl content, lower phenolic hydroxyl content, and higher molecular weight showed no inhibitory effect on the enzymatic hydrolysis of α-cellulose, with conversion hovering over 52.4–54.1 % upon the addition of lignin derivatives obtained from both ethanol/acetone-diluted H 2 O-washed processes to α-cellulose.
研究领域:
生物能源
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生物质转化
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木质纤维素生物燃料
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绿色化学
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生物炼制
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 106
·期 2
·860-866
·
IF 4.186
Weiliang Jin,Jie Pang,Qian Kou,Chuntao Ge,Hongmin Zhu,Geir Martin Haarberg,Saijun Xiao,Jun Zhang
This paper demonstrates the availability of electro-codeposition (i.e., the simultaneous occurrence of electrophoretic deposition of nanoparticles and electrochemical deposition of metal ions) in molten salts without the assistance of stirring of the bath. In molten NaCl–KCl–AlCl 3 –MoO 3 system containing TiB 2 nanoparticles at 710°C, the electro-codeposition of TiB 2 nanoparticles and Mo(VI) ions has been achieved, and a (Ti, Mo)B 2 coating has been prepared.
研究领域:
材料科学
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电化学
·
表面工程
·
纳米材料
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Fanyuan Zhang,Youcai Zhu,Jiongyi Chen,Xinyi Yang,Zhen Liu,Zuoxiang Zeng,Li Sun
The Friedel–Crafts acetylation of 2-methylnaphthalene (2-MN) represents a powerful approach for synthesizing 2-methyl-6-acetylnaphthalene (2,6-MAN). The identification of catalytically active species in Friedel–Crafts acylation has recently attracted considerable attention. In this study, we performed an experimental and computational investigation of the AlCl3-catalyzed Friedel–Crafts acetylation of 2-MN in nitrobenzene and dichloromethane solvents. The yield of the acetylation can be significantly affected by the solvent and the addition method. Following the substitution mechanism, the stepwise deprotonation pathway is preferred in both solvents, which is mediated by the donor–acceptor complex as the catalytically active species. The calculations with the explicit solvent led to the same conclusions. This study provides important understanding of the AlCl3-catalyzed Friedel–Crafts acetylation reaction, with potential applications to other Lewis acid-catalyzed acylation reactions.
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PubMed
高影响因子
JOURNAL OF PHYSICAL CHEMISTRY B
·
2021
·
IF 2.991
Jinxia Wang,Xiangyue Liu,Hongwei Xie,Huayi Yin,Qiushi Song,Zhiqiang Ning
The magnetohydrodynamic (MHD) effect was usually used to improve the mass transport during electrodeposition in a solution electrolyte. Herein, we reported the effect of a magnetic field on the electrode process of Al electrodeposition in a [Emim]Cl-AlCl3 ionic liquid composed of pure ions. Under a uniform and perpendicular magnetic field to the Cu electrode plane, electrochemical impedance spectroscopy (EIS) of the circuit, the cyclic voltammetry (CV) curves, and the different capacitances at the potential of zero charge (PZC) were measured, and the electrodeposition of aluminum was carried out at a constant current density. The results indicated that a vertical magnetic field significantly reduced the resistance (activation energy) for charge transfer of electrochemical reduction of Al2Cl7–; meanwhile, the capacitance of an electric double layer (EDL) and the density of the electrodeposited aluminum layer were increased.
研究领域:
电化学
·
材料科学
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DOI
PubMed
高影响因子
Polymers
·
2019
·Vol. 11
·期 12
·2121
·
IF 3.164
Yulong Jin,Liang Chen,Xing Guo,Linfeng Xu,Zhihua Zhu,Zhen Liu,Ruihua Cheng,Boping Liu
A complexed initiating system AlCl3·phenetole/TiCl4·H2O was prepared by simply compounding AlCl3/phenetole and TiCl4/H2O and used for cationic polymerization of isobutylene. It was found AlCl3·phenetole/TiCl4·H2O exhibited activities 1.2–3 times higher than those of AlCl3/phenetole, and more than an order of magnitude higher than those of TiCl4/H2O, which indicated a notable synergistic effect produced in the complexed system. In addition, due to the higher activity of AlCl3·phenetole/TiCl4·H2O, lower coinitiator concentration and polymerization temperature, as well as higher monomer concentration were more favored for this complexed initiating system to produce polyisobutylene (PIB) with reasonable molecular weight (Mw) and molecular weight distribution (MWD). Furthermore, high molecular weight polyisobutylene (HPIB) with Mw= 1–3 × 105g·mol−1could be successfully produced by the complexed catalyst system at Tp= −60 to −40 °C. As a whole, the high activity as well as the simple preparation procedures of the complexed initiating system offer us a unique approach for the production of HPIB with improved efficiency.
研究领域:
高分子化学
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材料科学
·
催化
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高影响因子
Lubricants
·
2022
·Vol. 10
·期 11
·287
·
IF 3.584
Jiajia Fu,Chen Chen,Qiong Tang,Hong Xu,Lei Liu,Jinxiang Dong
Alkyltetralins similar to naphthenic base oil were successfully synthesized by Friedel–Crafts alkylation of tetralin with short-chain α-olefins (C3/C4), where the applied chemical feedstock could be obtained from coal chemical industry with ease. The Et3NHCl-AlCl3ionic liquid (IL) as catalyst exhibited excellent catalytic performance for alkylation of tetralin withn-butene or propylene. The reaction conditions were investigated in detail to achieve the high selectivity toward multi-alkyltetralins, and the selectivity for multi-alkyltetralins could reach as high as 90% with the complete conversion of tetralin. For comparison, three alkyltetralins with various side-chain alkyl groups and number of side-chains on tetralin were isolated, which behaved as lubricating base oils for investigation. The synthetic oils exhibited an excellent low temperature fluidity, and good potential for compatibility with additives. Di-propyltetralins (DPT) and di-butyltetralins (DBT) displayed the lower friction and wear values than mono-butyltetralins (MBT), which had comparable tribological properties to the commercial naphthenic base oil 4006 (N4006).
研究领域:
化学工程
·
催化
·
润滑科学
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DOI
高影响因子
Oxidative Medicine and Cellular Longevity
·
2022
·
IF 7.31
Debo Gao,Pingli Li,Fei Gao,Yangjun Feng,Xiaolin Li,Delong Li,Yuqin Li,Yuliang Xiao
Previous studies have demonstrated that both CS and LiCl possess anti-Alzheimer's disease (AD) activities. We prepared chondroitin sulfate-Li (CS-Li) and investigated its effect on AD and explored the possible mechanisms both in vitro and in vivo . We found that CS-Li could inhibit amyloid β (A β ) aggregation and protect SH-SY5Y cells from A β 1-42 -induced cytotoxicity in vitro . In D-gal and AlCl 3 -induced AD mouse model, CS-Li improves the spatial learning and memory abilities of AD mice, reverses the nuclear pyknosis and cell edema, and increases the survival rate of neurons in hippocampus of mice. Moreover, CS-Li significantly increased the levels of GSH-Px, Na + /K + -ATPase, and ChAT and decreased the levels of MDA and AchE in AD mice. Western blot results demonstrated that CS-Li could decrease the hyperphosphorylation of tau (Ser396/Ser404) by regulating the expression of p-GSK-3 β (Ser9) and PP2A and inhibit the expression of proinflammatory factors through inhibiting NF- κ B nuclear translocation by activating the MAPK signaling pathways. In a word, CS-Li can delay AD development through multitarget processes, including A β aggregation inhibition, oxidative stress damage, tau hyperphosphorylation, and inflammatory response, thereby improves learning and memory abilities.
研究领域:
神经科学
·
药理学
·
分子生物学
·
细胞生物学
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DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2017
·Vol. 164
·期 13
·A3292
·
IF 3.259
Jiguo Tu,Shubo Wang,Shijie Li,Chen Wang,Dongbai Sun,Shuqiang Jiao
The need of an efficient and sustainable way to store energy is an urgent necessity. Unfortunately, due to the cost and limited resources of lithium, the use of the most mature Li-ion batteries for grid-scale storage of renewable energy production is nowadays going on slowly. Here, a low-cost, high-capacity Al/graphite rechargeable aluminum battery was explored based on molten AlCl3-NaCl liquid electrolyte. The battery shows a specific capacity of above 200 mAh g−1 at a current density of 100 mA g−1, even maintaining at 111.4 mAh g−1 at a higher current density of 1000 mA g−1 over 1000 cycles, with a Coulombic efficiency of 94.6%. Raman spectroscopy and X-ray photoelectron spectroscopy reveal that AlCl4− and Al2Cl7− anions are intercalated between graphite layers at the graphitic carbon cathode, meanwhile Al2Cl7− anions are transformed into metallic Al and AlCl4− anions at the Al anode. The inherent low-cost and low-flammability, as well as the most outstanding high capacity, long-term cycling stability and Coulombic efficiency, are particularly favorable for grid-scale storage of renewable energy.
研究领域:
能源材料
·
电化学
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DOI
高影响因子
CARBOHYDRATE RESEARCH
·
2026
·
IF 3.4
Dongqi Liu,Jun Qian,Xing Chen,Qiaoling Liu,Xiaolei Liu,Xiaoqian Wang,Siyu Zhou,Ying Guan,Liang Zhou,Siquan Xu
A SnCl 4 ·5H 2 O/LVA-DMSO binary system was developed for glucose conversion. • The optimized system achieved 84% HMF yield at 150 °C within 10 min. • DMSO enhanced HMF formation by improving solvation and suppressing side reactions. • Balanced Lewis-Brønsted acidity was crucial for glucose to HMF. A deep eutectic solvent (DES) composed of SnCl 4 ·5H 2 O and levulinic acid (LVA) was developed and combined with dimethyl sulfoxide (DMSO) to construct an efficient reaction medium for the conversion of glucose into 5-hydroxymethylfurfural (HMF). Under the optimized conditions, the Sn/LVA-16-DMSO binary solvent, coupled with AlCl 3 ·6H 2 O as the catalyst, afforded an HMF yield of 84% at 150 °C within 10 min. The effects of key parameters, including solvent composition, DES molar ratio, catalyst dosage, glucose dosage, reaction temperature, and reaction time, were systematically investigated. Response surface methodology (RSM) revealed that reaction temperature and glucose dosage were the most significant linear factors affecting HMF yield within the studied range. The system also showed acceptable recyclability, as HMF could be extracted from the reaction mixture with a recovery efficiency of 86%, and an HMF yield of 52% was retained after five consecutive cycles. FTIR, DSC, TG, and DTG analyses indicated that the Sn/LVA DES formed a strong hydrogen-bonding network and modified the coordination environment of Sn species, while the combination of DMSO and AlCl 3 ·6H 2 O further provided favorable solvation and Lewis-Brønsted acid synergy for glucose conversion. Compared with previously reported DES-based systems, the present homogeneous DES-DMSO strategy combines a high HMF yield of 84% with a short reaction time of only 10 min, demonstrating an efficient approach for the rapid conversion of glucose to HMF. Download: Download high-res image (416KB) Download: Download full-size image
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Guiyang Li,Jinxia Wang,Hongwei Xie,Bo Tao,Zhenyu Li,Kai Yu,Qiushi Song,Zhiqiang Ning
Conquering the anodic passivation effects is essential to achieve the validity of the electrorefining process in room temperature ionic liquids. Herein, we investigated the effect mechanism of H 2 O on the removal of AlCl 3 (s) passivation layer on the surface of aluminum anode and the deposition of aluminum foil on the cathode in EmimCl-AlCl 3 ionic liquid. The results indicate that the introduced H 2 O derives an intermediate species AlCl 3 OH − , which is the key to de-passivation. The de-passivation effect of AlCl 3 OH − is divided into three stages with the anodic potential increase: under the low anodic potential of 0.8 V, it derives the black passivation film AlCl 2 OH(s), and consumes the AlCl 3 (s) passivation layer derived by Al 2 Cl 7 − → AlCl 4 − + AlCl 3 (s) at the anodic potential of 1.6 V ~ 2.2 V. Moreover, the derived AlCl 2 OH(s) is simultaneously also consumed up by the reaction AlCl 2 OH(s) + AlCl 4 − → Al 2 Cl 6 OH − . At the higher anodic potential of 2.2 V, it consumes up the derived AlCl 3 passivation layer, which ensures the continuous dissolution of the aluminum anode, resulting in the high anode dissolution current efficiency of about 100 %. On the other hand, the aluminum foil is electrodeposited by the electrochemical reduction of 4Al 2 Cl 7 − and Al 2 Cl 6 OH − species. However, the introduction of H 2 O reduces the current efficiency of the aluminum foil electrodeposition from 97 % to 90 % as the anodic potential increases from 1.6 V to 3.0 V. In addition, the lithium cobaltate half-cell with the electrodeposited aluminum foil collector shows a superior capacity retention rate of 98.33 % for 150 cycles at 0.5C current density.
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高影响因子
Biomass Conversion and Biorefinery
·
2020
·Vol. 11
·期 5
·1931-1941
·
IF 2.602
Tian Xiatian,Qi Benkun,Zhang Shaofeng,Luo Jianquan,Wan Yinhua
5-Hydroxymethylfurfural (HMF) is a promising platform chemical for production of value-added chemicals and fuels. Conversion of abundantly available and cheap sucrose for HMF synthesis was systematically investigated in the present study. Results showed that Lewis acid AlCl 3 is effective in catalytic transformation of sucrose. Combining AlCl 3 with different Brønsted acids, no matter whether they were inorganic acids (HCl, H 2 SO 4 , and H 3 PO 4 ) or organic acids (malic acid, succinic acid, and oxalic acid), or variation of ratio of Lewis acid/Brønsted acid represented by AlCl 3 /HCl, did not change the obtained maximum HMF yields compared with AlCl 3 alone, but shortened the time required to reach the maximum HMF yield. Sucrose conversion in a green reaction media of aqueous γ-valerolactone (GVL) solvent resulted into comparable HMF yields with dimethyl sulfoxide (DSMO)-water system. Addition of monovalent salt NaCl and divalent salt Na 2 SO 4 produced opposite effect with Cl − promoting while SO 4 2− inhibiting HMF production. Furthermore, HMF synthesis from constituent monosaccharides of sucrose and molasses, a by-product from sugar manufacturing process, was also carried out and it was found that an equivmole mixture of glucose and fructose gave rise to almost identical HMF yield to the same mole of sucrose. Molasses, even after chemical pretreatment for removal of certain amount of inorganic salts and color substances, was significantly inferior to synthetic molasses in terms of HMF formation, indicating the complexity and difficulty in chemical valorization of molasses for production of platform molecules.
研究领域:
化学工程
·
绿色化学
·
生物化学工程
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高影响因子
危险品化学品经营许可证（带存储）