JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2021
·
IF 2.694
Fei Yu,Liu-Ying Yu,Ke-Jun Wu,Chao-Hong He
In this work, the thermal conductivities of toluene, cyclohexane, and diethyl ether were measured from 291 to 351 K at pressures up to 15.1 MPa. The binary systems of toluene–cyclohexane, toluene–diethyl ether, and cyclohexane–diethyl ether were also measured from 291 to 351 K at pressures 0.1 and 10.1 MPa. The relative expanded uncertainty of the obtained data was estimated to be ±2% with a confidence level of 0.95 (k = 2). The linear thermal conductivity model was used to correlate the pure components as a function of temperature and pressure. The thermal conductivities of binary systems were fitted as a function of temperature and composition. For pure components, the maximum values of absolute percentage deviation (AAD) and maximum absolute percentage deviation (MAD) are 0.45 and 0.87%, respectively. For binary systems, the maximum values of AAD and MAD are 0.56 and 1.79%, respectively.
研究领域:
热力学
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化学工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Shuang Qi,Tingwei Zhang,Chaofeng Zhang,Bo Jiang,Caoxing Huang,Qiang Yong,Yongcan Jin
As the most important phenolic biopolymer in nature, lignin shows promising application potentialities in various bioactivities in vivo and in vitro, mainly including antioxidant, anti-inflammatory, hypolipidemic, and antidiabetic control. In this work, several carbon-based solid acids were synthesized to catalyze the fragmentation of organosolv lignin (OL). The generated lignin fragments, with controllable molecular weight and functional groups, were further evaluated for their application in the prevention and treatment of type 2 diabetes mellitus (T2DM). The results suggested that the urea-doped catalyst (SUPC) showed a more excellent catalytic performance in producing diethyl ether insoluble lignin (DEIL) and diethyl ether soluble lignin (DESL). In addition, the lignin fragments have a good therapeutic effect on the cell model of T2DM. Compared with the insulin resistance model, DEIL obtained by catalytic depolymerization of OL with SUPC could improve the glucose consumption of insulin-resistant cells. Moreover, low-concentration samples (50 μg/mL) can promote glucose consumption (19.7 mM) more than the traditional drug rosiglitazone (17.5 mM). This work demonstrates the prospect of depolymerized lignin for the prevention and treatment of T2DM and provides a new application field for lignin degradation products.
研究领域:
化学
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材料科学
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生物技术
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药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TENSIDE SURFACTANTS DETERGENTS
·
2020
·Vol. 57
·期 1
·82-89
·
IF 1.089
Zhifei Wang,Yunling Li,Yongbo Song,Jun Li,Qinghong Zhang
A quaternary ammonium salt gemini surfactant (C 12 N) 2 O with diethyl ether as the spacer group was synthesized by dodecyl dimethyl amine and 2-chloroethyl ether. The structure of the product was confirmed by Fourier transform infrared spectra (FT-IR) and proton nuclear magnetic resonance spectra ( 1 H NMR), which showed that the structure of the synthesized product was consistent with the theoretical structure. We tested the surface tension of (C 12 N) 2 O at 25°C and found the critical micelle concentration (CMC) was roughly 2 orders of magnitude lower than that of dodecyl trimethylamine chloride (DTAC). Gemini structure and the unique diethyl ether spacer group endowed the novel amphiphile excellent properties including low contact angle and high antistatic property. (C 1 2 N) 2 O showed good compatibility with alcohol ether sulfate (AES) and dodecylbenzene sulfonate (LAS) in surfactant mixed systems. When the ratio of (C 12 N) 2 O:AES was 1:4 and (C 12 N) 2 O:LAS 1:9, the emulsifying properties were preferable to single surfactant.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2021
·
IF 5.062
Guoqin Wang,Gangli Zhu,Yong Ding,Chungu Xia,Zhen Li
Polyoxymethylene dialkyl ethers, which can be blended into diesel fuels, have attracted increasing attentions due to their advantages for fuel additives. It can utilize bioethanol and biomass syngas, helping to achieve the carbon neutral target earlier. Polyoxymethylene diethyl ethers (PODEE n ) synthesis requires efficient catalysts with high performance. In this work, the mesoporous acidic functional N-containing ZrN x O y catalysts were prepared with a Sol-Gel assisted solvothermal method. The acid nature and strength, morphology, crystalline structure and pore distribution of catalysts were characterized by fourier transform infrared (FT-IR) spectroscopy, pyridine-adsorption infrared spectra (Py-IR), scanning electron microscopy (SEM), Transmission electron microscopy (TEM), X-ray diffraction (XRD), thermogravimetric analysis/differential scanning calorimetry (TGA/DSC), N 2 adsorption-desorption isotherm, X-ray photoelectron spectroscopy (XPS), temperature-programmed desorption of ammonia (NH 3 -TPD) etc, showing catalyst possessing crystalline-amorphous mixed domains with smaller defective tetragonal nanoparticles and mesopores . The catalysts were applied in PODEE n synthesis, showing excellent activity and selectivity under mild conditions. And the high trioxane (TOX) conversion of 93 % and excellent PODEE 2−8 selectivity of 98 % can be achieved at 80 °C under atmospheric pressure owning to the superior properties.
研究领域:
催化化学
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能源化学
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材料科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Lijuan Zhang,Si Wang,Zhiqin Yuan,Chao Lu
Development of selective cataluminescence (CTL) sensors toward volatile organic compounds (VOCs) is of great importance to environmental analysis and daily chemicals safety. Although some reports for the determination of VOCs based on CTL have been reported, part of them suffered relatively low selectivity because of their high sensitivity toward interferents. In this study, mesoporous TiO 2 nanoparticles have been exploited to detect diethyl ether with the usage of a 440 nm bandpass filter. The proposed method showed high selectivity toward diethyl ether over other VOCs, such as acetaldehyde, acetone, butanone and butanol, etc. Such a high selectivity was majorly attributed to the difference of CTL emission profiles of various VOCs reaction intermediates, and only diethyl ether exhibited strong CTL emission at about 440 nm. Under the optimal conditions, diethyl ether could be detected ranging from 2.0 to 50.0 mM. Furthermore, the practical application of this proposed CTL sensor for diethyl ether was validated with artificial samples and commercial perfumes. In general, such a simple method with high selective detection through controlling detection range could be extended to other analytes.
研究领域:
环境分析
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化学安全
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Changhui Liang,Hongjun Fan,Aiqun Kong,Mao Peng,Menghui Liu,Weizhuo Xu,Jian Song,Yongxin Li,Jinli Zhang,Yunjie Ding,Z. Conrad Zhang
The hydrogen evolution reaction (HER) activity of Pt-based electrocatalysts in alkaline solution is typically limited by the rate of water dissociation. Herein, we report a facile one-step strategy in the synthesis of Pt/Ni(OH) 2 heterojunction for enhanced HER activity. Ultrathin Ni(OH) 2 nanosheets decorated with uniformly dispersed Pt nanoparticles at average sizes of 2.2 nm are in-situ grown on nickel foam (NF) with binder-free feature under mild conditions due to induction by ethylene glycol diethyl ether, even without adding extra Ni 2+ sources. The synthesized Pt/Ni(OH) 2 /NF shows superior HER activity in 1.0 M KOH solution, achieving low overpotentials of 42, 91, and 114 mV at current densities of 10, 100, and 200 mA cm −2 and outstanding durability for 25 h at 25 mA cm −2 without noticeable Pt agglomeration. This work offers a mechanistic insight into one-step fabrication of Pt/Ni(OH) 2 -based catalyst with high activity and stability for HER.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 68
·39622-39630
·
IF 3.049
Yabin Wang,Keke Hu,Yantu Zhang,Xiuping Ding
Selective and controllable cataluminescence (CTL) sensors for volatile organic compounds (VOCs) are significant for chemical safety, environmental monitoring, health effects on human beings, and so forth. Most of the exploited CTL-based sensors suffer relatively low response and poor selectivity because of their high sensitivities to interferential substances. In this investigation, dendritic fibrous nano-silica & titania (DFNST) spheres have been synthesized as novel sensing materials and the corresponding DFNST-based CTL sensor has been fabricated to detect diethyl ether with high selectivity via a method of utilizing one 440 nm bandpass filter. The as-prepared DFNST hybrids not only keep the excellent dendritic fibrous morphology but also bear ca. 21 wt% catalytic titanium oxide of anatase crystalline structure. The DFNST-based sensor exhibits extremely strong CTL emission at 440 nm toward diethyl ether against other VOCs like acetone, ethyl acetate, butanol, and so forth. The high response can be attributed to the unique architectural texture of DFNST. Under the optimum parameters, ether could be easily detected in a wide range from 2.0 to 40.0 mM with a fine detection limit of 1.55 mM (S/N = 3). Furthermore, the working life of this CTL sensor is satisfactory with outstanding stability and durability, far from damaging the morphology and activity of the DFNST sensing material. In conclusion, it is expected that this novel sensing material, the relevant CTL sensor, and the approach of employing the bandpass filter will be significant for the detection of diethyl ether in actual applications.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Anran Wang,Weijun Zhou,Aixiang Huang,Minfeng Chen,Qinghua Tian,Jizhang Chen
Due to their low cost, high safety, environmental friendliness, and impressive electrochemical performances, aqueous zinc-ion batteries are considered promising alternative technologies to lithium-ion batteries for use in large-scale applications. However, existing aqueous zinc-ion batteries usually suffer from poor cyclability and cannot operate at subzero temperatures. Herein, to solve these problems, the electrolyte in aqueous zinc-ion batterie is optimized by adding the appropriate amounts of diethyl ether and ethylene glycol. Results show that the addition of 1% diethyl ether contributes to the best cyclability at 25 °C. Furthermore, the addition of 30% ethylene glycol results in the best electrochemical performances at 0 and − 10 °C. This significant performance improvement at low temperatures is ascribed to the high ionic conductivity of the modified electrolyte and the low charge transfer impedance of the battery with the modified electrolyte at 0 and −10 °C. It is also shown that the modified electrolyte can decrease the nucleation overpotential of zinc plating, enhance the interfacial stability between the zinc metal and electrolyte, suppress the zinc dendritic growth and side reactions, and decrease the self-corrosion rate of the zinc anode. This work offers a facile strategy to realize aqueous zinc-ion batteries with excellent cyclability and antifreezing ability and may inspire research on other aqueous energy storage systems.
研究领域:
能源存储
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材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small Structures
·
2022
·Vol. 3
·期 10
·2200078
·
IF 11.343
Danni Wang,Xiaoqiong Du,Biao Zhang
It has been widely recognized that ether electrolytes show great advantages in building robust solid–electrolyte interphases (SEIs) for stable anode performance. However, its extension to the graphite electrode is hampered by the ether solvent cointercalation, leading to a lower capacity and higher potential than those in ester counterparts having neat cation insertion. Herein, the ether solvent molecules by optimizing the O/C atomic ratio through tailoring the end group and chain length are screened. Such a modification alters the solvation strength between K ions and the solvent, which dictates the intercalation behavior in graphite. In particular, an ethylene glycol diethyl ether-derived electrolyte is developed, which prevents the solvent cointercalation and induces the formation of binary intercalation compound KC 8 . Meanwhile, the novel ether electrolyte helps build a uniform and robust SEI, significantly boosting the rate capability and long-term stability of graphite anode. This study resolves the dilemma of ether electrolyte in realizing the stable and high-capacity graphite anode for facilitating its application in potassium-ion batteries.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2014
·
IF 5.825
Zhongshan Liu,Junjie Ou,Hui Lin,Hongwei Wang,Zheyi Liu,Jing Dong,Hanfa Zou
Two monolithic polymer columns were directly prepared in the UV-transparent fused-silica capillaries via photoinitiated thiol-yne click polymerization of 1,7-octadiyne (ODY) with a dithiol (1,6-hexanedithiol, 2SH) or a tetrathiol (pentaerythriol tetrakis(3-mercaptopropionate), 4SH) within 15 min. The rapid polymerization provided a time-saving approach to optimize preparation conditions. Then, two porogenic systems of diethylene glycol diethyl ether (DEGDE)/tetrahydrofuran (THF) and DEGDE/poly(ethylene glycol) (PEG, Mn = 200) were found to effectively control the porous structure of two kinds of polymeric monoliths (O2SH and O4SH), respectively. The almost disappearance of thiol and alkynyl vibrations (2560 and 2115 cm–1, respectively) in infrared spectra and Raman spectra indicated a high conversion of the thiol-yne polymerization reaction. The thiol-yne polymerization was further proved by analyzing the energy-dispersive X-ray spectrum (EDS), MALDI-TOF mass spectrum, and elemental data. Scanning electron microscopy (SEM) images showed the monolithic polymer columns with homogeneous porous structure and macropore size of 0.5–1.0 μm, which facilitated the minimum plate heights of 10.0–12.0 μm for alkylbenzenes in reversed-phase liquid chromatography (RPLC). The low values of the A and C terms (<1.0 μm and <15.5 ms, respectively) in the van Deemter equation were similar to those obtained by some monolithic silica columns. The BSA tryptic digest was also separated on the monolithic polymer column by cLC-MS/MS. The result with 85% protein coverage was better than those given by some hybrid monolithic columns. The monolithic polymer columns were further applied for separation of phenols, natural products, and standard proteins and demonstrated satisfactory separation ability.
研究领域:
分析化学
·
材料科学
·
分离科学
✓ 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）