CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiang Li,Wei Liu,Yan Wang,Linze Lv,Huaiwei Feng,Weibo Huang,Yu Sun,Weixing Xiong,Honghe Zheng
Covalent organic frameworks (COFs) have been widely used in various fields due to their abundant elemental resources, easy structure control, and abundant tunable porous structures. COFs containing electroactive organic groups with reversible redox behavior are potential electrode materials for next-generation high-performance lithium-ion batteries (LIBs). However, the aromatic conjugated structure of the backbone moiety in most reported COFs cannot participate in redox reactions, resulting in low capacity of COFs. At the same time, the synthesis processes of COFs are usually complicated and generally requires high temperature and high pressure. On this basis, an imine bond-rich COF (TAACOF) with reversible Li-ion bonding is developed, which has the advantages of facile preparation and low energy consumption. In particular, the lone pair electrons of the N atom in the imine bond can induce lithium ions to combine with the aromatic conjugated structure, which greatly improves the capacity of the TAACOF electrode. After 800 cycles, the active sites of the TAACOF are fully activated, and after a 14-electron redox reaction, the specific capacity can reach as high as 1035.7 mAh/g.
研究领域:
材料科学
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电化学
·
储能
·
有机化学
·
纳米技术
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Hongyu Qu,Xiangcheng Li,Xiao Han,Junjie Li,Xinqiang Feng,Chuang Liu,Zhendong Wang,Weimin Yang
Rational design of highly efficient non-noble-metal catalysts for the selective hydrogenolysis of biomass platform compounds to produce fuels and fine chemicals is a key pursuit for the sustainable chemical industry. In this work, we report for the first time the synthesis of a Ni-supported germanosilicate zeolite (Ni-SCM-14) catalyst by a simple grinding method, showing both satisfactory yield (90.3%) and good stability in eight cycles for the hydrogenolysis of 5-hydroxymethylfurfural (HMF) to 2,5-dimethylfuran (DMF). Characterization revealed that Ni nanoparticles were highly dispersed on the SCM-14 zeolite with strong interactions. The synergistic effect of highly dispersed Ni hydrogenation sites and the weak acidity activation of the C–O bond provided by SCM-14 is considered to be the key to the efficient hydrogenolysis of HMF. This discovery opens up a new avenue for germanosilicate zeolite to activate the C–O bond.
研究领域:
催化化学
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生物质转化
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材料科学
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产品关联
DOI
高影响因子
Energy Storage Materials
·
2019
·
IF 0
Huanhuan Jia,Yulong Sun,Zhuoran Zhang,Linfeng Peng,Tao An,Jia Xie
Sodium superionic conductors are keys to realize room-temperature and high safety all-solid-state sodium batteries . Sulfide based sodium superionic conductors are promising but most reported examples are based on group 15 elements. To extend the horizon, we demonstrate a development route from group 14 elements based sodium chalcogenide . Na 4 Sn 0.67 Si 0.33 S 4 shows a distinctly new structure with space group I 4 1 / acd and 3D diffusion pathway by silicon doping in Na 4 SnS 4 , which exhibits 2 orders of magnitude conductivity improvement than that of the mother compound Na 4 SnS 4 . And the Na 4 Sn 0.67 Si 0.33 S 4 can be taken as a high tolerance structural template for chemical manipulation. Based on the structural template, aliovalent substitution of P 5+ for M 4+ leads to a wide range of solid solutions of Na 4- x [Sn 0.67 Si 0.33 ] 1- x P x S 4 (0 ≤ x ≤ 0.4) with enhanced sodium conductivity. The highest ionic conductivity reaches 1.6 × 10 −3 S cm −1 with x = 0.25. Change of vacancy population and weak Na-S interaction induced from P doping are main reasons for the improvement of ionic conductivity. In addition, excellent air stability is demonstrated. This work expands the exploration opportunities and provides further understanding of structure-property relationship for sodium superionic conductors.
研究领域:
材料科学
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固态化学
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储能
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离子导体
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电池材料
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DOI
ELECTROPHORESIS
·
2012
·Vol. 33
·期 13
·2019-2027
·
IF 3.303
Yaping Li,Li Qi,Juan Qiao,Ying Shen,Huijuan Yan,Peiyong Xin,Huimin Ma
A novel series of diblock copolymers, poly(butyl methacrylate) n -block-poly(glycidyl methacrylate) m [P(BMA) n -b-P(GMA) m ], were synthesized by atom transfer radical polymerization and developed as covalent coating of capillaries. The excellent performance of this coating in separation of three 1,4-dihydropyridines (DHPs) derivatives (amlodipine, nicardipine, nitrendipine) was achieved when the diblock copolymers self-assembled into micelles, which was confirmed by transmission electron microscopy, dynamic light scattering, and atom force microscopy. Meanwhile, the effects of block ratio n/m, pH value, buffer concentration, and organic solvents on the separation of 1,4-DHPs were investigated in detail. Then, the relationship between the morphologies of copolymers and the separation resolutions of 1,4-DHPs was discussed. Furthermore, the proposed method exhibited good run-to-run and column-to-column precision with relative standard deviations of electroosmotic flow less than 3.0%. It was also validated with linearity of three 1,4-DHPs in the range of 0.01–1.80 mM ( r 2 ≥ 99.7%), efficient recovery (94–103%), and good repeatability (≤ 3.8%). In addition, three 1,4-DHPs were successfully separated in the spiked human serum sample, which indicated the potential utility of this method in biological sample analysis.
研究领域:
分析化学
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药物分析
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2013
·
IF 4.612
Juxiang Ruan,Xiongjun Zuo,Qiwei Lang,Zhijian Zeng,Chao Li
This paper reports the preparation of a novel, silica-based, strong anion-exchange stationary phase from a 1,4-diazacyclohexane derivative. To prepare the difunctional strong anion-exchange stationary phase, activated silica beads were first bonded with 3-chloropropyltriethoxysilane and then reacted with 1-methylpiperazine followed by benzyl chloride . The silica beads, the strong anion-exchange stationary phase and its precusors were instrumentally characterized. Aromatic acids were separated with non-aqueous anion-exchange chromatography. After elution with eluant prepared in mixed solvents of water and methanol, the resulting 1,4-diazacyclohexane-derived, difunctional, strong anion-exchange stationary phase exhibited good separation and selectivity for the aromatic acids investigated. The effects of eluant pH, eluant ion concentration and solvent composites on the separations were investigated. Organic acids with different substituents were eluted in order of decreasing dissociation coefficients, with no observable peak shape differences.
研究领域:
分析化学
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色谱技术
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Hao Deng,Guang Wu,Lingyu Zhou,Xiaomei Chen,Li Guo,Senlin Luo,Qingchun Yin
Biogenic amines (BAs) produced by microbial decarboxylation of amino acids are crucial toxic nitrogenous compounds in fish. An optimized ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC–MS/MS) method with simple pretreatment was established to detect 14 BAs in both raw (control check, CK) and deep-fried (DF) hairtails. This method exhibited a good linear relationship with average recoveries of 73.3–120.0 % and relative standard deviations of 2.5–10.0 %, respectively. The total BAs in CK and DF hairtails decreased sharply to 338.2 and 25.3 mg/kg on the 9th day, respectively. Four BAs, including cadaverine (CAD), histamine (HIS), tyramine (TYR), and putrescine (PUT) accounted for 92.5–99.9 % of total BAs were selected as the dominant BAs. Bacterial analysis showed that the abundance of DF was relatively low. Further correlation analysis proved that Vibrio had a significant ( p < 0.05) positive correlation with total BAs and could be the main BA-producing bacterium in DF hairtail. This work provides new evidence of the accumulation of BAs in refrigerated hairtail.
研究领域:
食品科学
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微生物学
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分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 9
·7164-7171
·
IF 2.22
Wang Chuang,Li Ying,Zhou Faguang,Li Zhuowei,Jiang Jing,Zhu Ge
The discovery of near-ultraviolet-excited orange-emitting phosphors is a major challenge in light-emitting diodes. Benefitting from highly condensed framework and abundant cation sites of β -Ca 3 (PO 4 ) 2 -type compounds, a novel orange emitter, Sr 19 Mg 2 (PO 4 ) 14 :Eu 2+ , has been synthesized and investigated in this study. The structure and coordination environment around each cation were determined by Rietveld refinement for the first time. The optical bandgap was estimated by diffuse reflectance spectrum and the photoluminescence performance was studied systematically. The Sr 19 Mg 2 (PO 4 ) 14 :Eu 2+ phosphor exhibited strong absorption in near-ultraviolet region, and emitted broad-band orange emission from 500 to 750 nm peaked at 620 nm. According to the Rietveld refinement result, photoluminescence and Gaussian fitting spectrum, it could be inferred the emission spectrum of Sr 19 Mg 2 (PO 4 ) 14 :Eu 2+ came from three different Eu 2+ luminescent centers which could be assigned to the different cation site. The different thermal stability of each luminescent center was also investigated and explained by the different Debye temperature (Θ D ) calculated by average atomic displacement parameter; however, its integrated thermal stability still needs to be improved. All the results indicated Sr 19 Mg 2 (PO 4 ) 14 :Eu 2+ may be applied as an alternative orange phosphor in WLEDs.
研究领域:
材料科学
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光学材料
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固态化学
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光子学
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发光材料
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Huimin Liu,Shui Wang,Chao Qu,Manman Li,Yixin Qu
In this paper, the solubility of chlorpropamide (CPA) in 14 solvents including 8 alcohols (ethanol, n-propanol, isopropanol, n-butanol, 2-butanol, iso-butanol, n-pentanol, and isopentanol) and 6 acetate esters (ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, amyl acetate, and methyl propionate) at temperatures of 283.15 to 323.15 K and atmospheric pressure was determined using a laser method. The solubility as a function of temperature was regressed using modified Apelblat, Van’t Hoff, λh, Wilson, and nonrandom two-liquid (NRTL) models. On the basis of the experimental and the simulation results, the mixing properties of the solutions, that is, mixing Gibbs energy, enthalpy, and entropy, were estimated.
研究领域:
化学工程
·
药物化学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2016
·
IF 2.74
Chenglong Shi,Yongzhong Jia,Jiang Xiao,Xingquan Wang,Ying Yao,Yan Jing
In this paper, a novel liquid-liquid extraction system was investigated for the selective separation of lithium isotopes using ionic liquid (IL) and dichloroethane as extraction solvent and dibenzo-14-crown-4 (DB14C4) as extractant. Results showed that the separation performance of DB14C4 has been improved after the ILs were involved in the extraction process. The maximum single stage separation factor α for 6 Li/ 7 Li obtained in the present study was 1.021. The light lithium isotope 6 Li and the heavy lithium isotope 7 Li were concentrated in organic phase and solution phase, respectively. The order of the single stage separation factor obtained in different lithium salts was LiI > LiBr > LiClO 4 > LiCl. From the temperature dependence data, the thermodynamic functions values of the lithium isotope exchange reaction were calculated.
研究领域:
化学工程
·
核化学与放射化学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Miao Ma,Jidong Wang,Xiaotong Yang,Zhong Zhao
Bifonazole is a derivative of imidazoles with a wide antibacterial spectrum and is widely used for treating various fungi infections. However, in the open literature, the solubility data of bifonazole are rarely reported. Considering the importance of the solubility of bifonazole in its manufacture and applications, the solubility of bifonazole in 8 alcohols and 4 n-alkyl acetates as well as acetonitrile and N, N-dimethylformamide in the temperatures ranging from 283.15 to 323.15 K has been measured with the assistance of a dynamic laser solubility monitoring device in this paper. The measured solubility of bifonazole follows the order of DMF > alcohols > esters > acetonitrile. The relationship between the solubility of bifonazole and temperature was correlated using three semi-empirical and two activity coefficient solubility models. In addition, the thermodynamic mixing properties (ΔmixG, ΔmixH, ΔmixS, γ1∞, and H1E, ∞) of the bifonazole solutions were evaluated in terms of experimental data and Wilson model parameters.
研究领域:
药学
·
物理化学
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Yiyao Cao,Yuxin Qian,Hong Ren,Liangliang Yin,Yuhan Xie,Yanqin Ji
In this study, we report a new analytical method for determination of 14 C in marine biota utilizing oxidation combustion separation combined with CaCO 3 suspension of precipitates for liquid scintillation counting (LSC). The main factors affecting the oxidation combustion efficiency of tube combustion furnace and the counting efficiency of the LSC were systematically investigated and optimized. Under the optimal combustion conditions, the combustion recovery of carbon ranged from 85.6 % to 92.4 % for five marine samples. And the method achieved a detection limit of 0.13 Bq/g for 14 C and repeatability of 3.9–9.1 %. The analytical turnover time was 6 h, and up to six samples could be processed simultaneously. Assessment of uncertainty components showed that the uncertainty in counting was the largest contributor, followed by combustion recovery and counting efficiency. The developed method enables reliable measurement of 14 C in marine biota, providing valuable analytical tool for risk assessment purposes.
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产品关联
DOI
PubMed
高影响因子
Viruses-Basel
·
2025
·Vol. 17
·期 11
·1452
·
IF 3.5
Nuo Wang,Ping He,Bohan Xu,Hongping Wei,Junping Yu
Diagnosis of dengue virus infections typically relies on RT-PCR-based methods, for which reliable positive controls are essential. Viral RNA is an ideal positive control, but its inherent instability poses a major challenge. Herein, we report a simple and effective method for stabilizing dengue virus RNA by immobilizing it onto silk fibroin films (RNA-SFFs). We evaluated various substrate surfaces for RNA-SFFs preparation and found that the inner surface of sealable bags is optimal for uniform film formation and easy harvesting. Screening different silk fibroin concentrations revealed that even low concentrations (2.8%) effectively preserved RNA well and kept Ct constant for up to 16 days at 25 °C, 37 °C, and even 45 °C (extreme weather for transportations). Due to its rapid film formation and ease of peeling, 7% silk fibroin was selected. Notably, the RNA-SFFs demonstrated robust resistance to UV irradiation, with no significant Ct value changes after 4 h of exposure. Long-term stability testing at −20 °C, 25 °C, and 37 °C showed that dengue serotype 1–4 RNA-SFFs remained stable for the entire duration of the study—up to 56 weeks (approximately 14 months)—at all tested temperatures. These results demonstrate that RNA-SFFs are highly stable, portable, and practical as positive controls for dengue diagnostics, with strong potential for use in on-site and resource-limited settings.
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产品关联
DOI
PubMed
高影响因子
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