JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2019
·
IF 2.298
Renjie Xu,Li Shen,Jie Xu,Xiang’an Lu,Xin Song
The equilibrium solubility of palmatine chloride in various mixed solvents consisting of ethanol (ethylene glycol (EG), isopropyl alcohol, and propylene glycol (PG)) plus water was experimentally obtained by static technology with environment conditions (283.15–328.15 K, 101.1 kPa). The measured data of palmatine chloride had a proportional relationship with temperature under the condition of fixed solvent composition, the same as increasing with the increasing the cosolvents of ethanol and EG except for the isopropyl alcohol and PG in four binary systems. The maximum solubility (0.01339 in mole fraction at 328.15 K) of palmatine chloride was obtained in neat ethanol. Under the same solvent composition and regular temperature, palmatine chloride was most soluble in a mixture of ethanol + water among all binary systems. X-ray powder diffraction and differential scanning calorimetry were employed to analyze palmatine chloride, which showed no significant change in the crystals before and after recrystallization. Three cosolvency models, the Jouyban–Acree model, van’t Hoff–Jouyban–Acree model, and Apelblat–Jouyban–Acree model were employed to correlate the measured data. In all calculation results, the largest RAD and RMSD were 1.80 × 10–2 and 6.80 × 10–5.
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DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Xinhui Geng,Ping Hu,Yanchun Zhou,Xiaoguang Luo,Haitao Han,Fei Wang,Anqi Li,Chengfan Yuan,Wuju Wang,Xinghong Zhang
Ultra-high temperature thermal protection materials play key roles for protecting hypersonic flight, re-entry vehicles, and propulsion systems from thermal attack. However, even the top-level passive protection materials such as C f /HfB 2 -SiC composites are unable to withstand the long-term harsh-environment above 3100 K as they suffer severe ablations. To overcome this bottleneck, herein a synergistic active-passive strategy is proposed. Embed aligned cooling channels were fabricated via microelectrical discharge machining (Micro-EDM) in C f /HfB 2 -SiC composite and liquid water was used as the cooling medium, forming an integrated system combining the composite’s passive ablation resistance and the channels’ active temperature regulation capability. Benefiting from this novel strategy, the surface temperature was significantly reduced by 46% (from over 3100 K to below 1700 K). Furthermore, a qualitative leap in ablation resistance was achieved, e.g., the ablation rate was dropped from 5.12×10 -3 mm/s to a non-ablation state after 400 s at such a high temperature, with almost no surface oxidation. These achievements were believed to stem from the synergistic coupling of the “passive barrier” (high melting point, good ablation resistance) and the liquid water’s “active reinforcement” (enhanced surface heat transfer). Notably, for 0.4 mm-diameter channels, heat and mass transfer were optimized, blockages and pressure fluctuations were mitigated, ensuring the cooling stability. This work demonstrates that the 3100 K ablation resistance limit of thermal protection materials can be broken, providing a promising route for developing materials suitable for service at temperatures above 3100 K, and lays a solid foundation for upgrading thermal protection in next-generation propulsion systems.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Yuli Shi,Haojian Zhang,Xiaodong Wang
N,N-Dimethylformamide (DMF) as the main solvent with strong dissolving power was blended with four secondary solvents (ethanol, n-propanol, isopropanol, and propylene glycol) with relatively weak dissolving power to form many new solvents. The dispersion index (inosine (form β) mole fraction) in five organic solvents such as DMF and in the newly formed solvent was also obtained one by one with the static method commonly used in solid–liquid equilibrium. The temperature environment includes the high temperature set at 323.15 K, the low temperature set at 278.15 K, and an interval between each temperature of 5 K. The pressure environment was the atmospheric pressure in the natural state, and the usual value was 101.0 kPa. In a mixed system, temperature was a non-negligible influencing factor from beginning to end, and its increase often led the solute to the trend of high solubility. In addition, the proportion of the main solvent also dominated the solubilization trend of the inosine (form β); the larger the proportion of DMF, the easier the dissolution process. When both of the above factors were fixed at a certain point, the dispersing ability of the dispersing liquid composed of DMF and ethanol was undoubtedly the first. Three models (Jouyban–Acree model, van’t Hoff–Jouyban–Acree model, and modified Apelblat–Jouyban–Acree model) were used to correlate the solubility data. The largest relative average deviation and root-mean-square deviation values were 4.66 × 10–2 and 7.27 × 10–4, respectively. The dispersion data of inosine (form β) obtained through this experimental process and related thermodynamic parameters obtained through thermodynamic calculations have important application significance for its industrial production and further purification.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Ying Zhang,Taotao Zhan,Junshuai Chen,Xin Li,Qi Zhou,Maogang He
The experimental speeds of sound for the binary system of ethanol (1) + n-heptane (2) with the mole fractions of ethanol being (0.100, 0.300, 0.500, 0.700, and 0.900) were measured by Rayleigh-Brillouin light scattering spectroscopy at temperatures from 293.35 to 433.89 K along three isobaric lines from 0.1 to 5.0 MPa. The expanded relative uncertainty for the reported speed of sound is estimated to be 1.6% with the level of confidence of 0.95 (coverage factor k = 2). The experimental data were correlated as a function of temperature and pressure, yielding absolute average percentage deviations of 0.34, 0.20, 0.38, 0.28, and 0.29% for the mole fractions of ethanol being 0.100, 0.300, 0.500, 0.700, and 0.900, respectively. Within the temperature limits of 298.15–318.15 K, the derived thermo-acoustic properties for the binary system of ethanol (1) + n-heptane (2), including the density, the specific isobaric heat capacity, the isentropic compressibility, the isobaric thermal expansivity, the isothermal compressibility, the specific heat ratio, the internal pressure and the free volume at pressures up to 5.0 MPa, and the intermolecular free length under atmospheric pressure were calculated and analyzed.
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高影响因子
FLUID PHASE EQUILIBRIA
·
2014
·
IF 2.241
Xuehong Zhao,Shu’ni Li,Quanguo Zhai,Yucheng Jiang,Mancheng Hu
This article deals with the mean activity coefficients of LiCl in amide–water mixtures with both ɛ -increasing co-solvent (urea–water, N -methylformamide–water), and ɛ -decreasing co-solvent ( N , N -dimethylformamide–water, N , N -dimethylacetamide–water) systems at 298.15 K by potentiometric method. Meanwhile, thermodynamic properties including the osmotic coefficients, the excess Gibbs free energy, the standard solubility product, the primary LiCl hydration number and the standard free energy of transference from water to the mixtures were also calculated. The nonideal behavior of these systems has been discussed in terms of the Pitzer, the Modified Pitzer and the extended Debye–Hückel equations parameters.
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高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2020
·
IF 3.085
Junnan Qu,Yi Du,Yibing Feng,Jianyong Wang,Bo He,Minxing Du,Yang Liu,Nan Jiang
A visible-light-responsive hybrid photocatalyst , K-doped g-C 3 N 4 /BiOBr, has been synthesized by K-doped g-C 3 N 4 (K–CN) and BiOBr. The property of photocatalysts was characterized by XRD , FT-IR, TEM, SEM , DRS , PL , EIS and HPLC. The photocatalytic activity of K-doped g-C 3 N 4 /BiOBr was evaluated by degradation of Rhodamine B (RhB) and tetracycline hydrochloride under visible-light irradiation. The K-doped g-C 3 N 4 /BiOBr hybrid photocatalyst which contains K–CN with mass fraction of 20% (20K–CN/BiOBr) shows the best degradation efficiency of RhB. The degradation efficiency of RhB (20 mg/L) can be achieved to 99% and the degradation efficiency of tetracycline hydrochloride by BiOBr decreased with the increase of K-doped g-C 3 N 4 doping. The results of photocurrent and EIS assumed that the tight coupling between K–CN and BiOBr can enhance the separating efficiency of photo-generated carrier. In addition, the capture experiment proof that h + is the primary active substance in the system of reaction and ·OH is the auxiliary active substance. After five degradation experiments, the efficiency of the degradation of Rhodamine B by the sample can still reach 90%, which proves that the samples are stable. A new and efficient method is provided in this work to solve the pollution of organic dyes and antibiotics.
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高影响因子
FLUID PHASE EQUILIBRIA
·
2014
·
IF 2.241
Rongrong Li,Guobo Huang,Huanan Hu,Chenghong Li,Wenping Jia
In this work, solid–liquid equilibria (SLE) data for ternary sodium 1-naphthalenesulfonate + sodium 2-naphthalenesulfonate + water system was measured at (283.15, 303.15 and 323.15) K respectively. The diagrams for solid liquid phase of the ternary system were well-established by the measured solubility data. The solid phases formed in the studied system were determined by the method of Schreinemaker’s wet residue. Moreover, the density of equilibrium liquid phase was gained in the process. At each temperature, there are two pure solids forming. They are sodium 1-naphthalenesulfonate and sodium 2-naphthalenesulfonate in the ternary system. The solubility data for the ternary system were calculated and regressed by NRTL model, giving acceptable results for the investigated systems.
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DOI
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 30
·9203-9210
·
IF 6.641
Y. Y. Zhou,E. H. Song,M. G. Brik,Y. J. Wang,T. Hu,Z. G. Xia,Q. Y. Zhang
Mn4+-doped fluoride red-emitting phosphors have been developed for backlighting white light-emitting diodes (WLEDs). However, the long fluorescence lifetime (τ > 5 ms) leads to the image-retention phenomenon for the human eye when Mn4+ is doped into equivalent X sites in A2XF6 (A = Na, K, Rb, Cs; X = Si, Ge, Ti, Zr). Herein, we report on novel red-emitting A2NaScF6:Mn4+ (A = K, Rb, Cs) (ANSF) phosphors with short fluorescence lifetimes (τ < 4 ms) and characteristic zero phonon line (ZPL) emission, which can be realized via non-equivalent doping of Mn4+ into Sc3+ sites. Density functional theory (DFT) calculations verified the formation of a slightly distorted environment of Mn4+ and an Na+ vacancy to balance the charge with Mn4+ non-equivalent doping. The WLED backlight using ANSF as a red-light component can reach a wide color gamut above 105% of the National Television Standards Committee (NTSC) standard, and the image-retention on the backlighted screen can be effectively avoided compared to the backlight obtained using commercial K2SiF6:Mn4+. Such a Mn4+ non-equivalent doping strategy opens a new perspective for the modification of local symmetry and enhancement of the luminescence properties of Mn4+-doped red-emitting fluoride phosphors.
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高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Tianxu Su,Bin Guan,Chunzheng Zheng,Jiefei Zhou,Zhen Huang
Developing low-temperature, high-efficiency ammonia decomposition catalysts for hydrogen production is essential for the broad application of hydrogen. This study conducted a systematic investigation of Ru/MgO catalysts modified with different alkali metals (Na, K, Cs), unveiling the impact of these modifications on catalyst performance and developing a highly efficient low-temperature ammonia decomposition catalyst. The addition of all alkali metals enhances the catalytic performance of Ru/MgO for ammonia decomposition, especially the addition of K, which results in the optimal enhancement of the catalyst, achieving a 75% ammonia decomposition efficiency at 350 °C (GHSV= 2,000 mL/h·gcat), more than doubling the performance of the unmodified Ru/MgO catalyst. The study revealed that the addition of potassium (K) altered the rate-determining step of the ammonia decomposition reaction from nitrogen recombination to the dissociation of the first hydrogen atom, and reduced the overall energy barrier required for the reaction. This facilitated the desorption of nitrogen from the Ru surface and the conversion of NH3, thereby accelerating the rate of the ammonia decomposition reaction.
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Wenyu Li,Kexin Ren,Hongyu He,Zhao Lei,Yuhang Chen,Maogang He,Ying Zhang
Cyclopentane is an excellent working fluid in high-temperature organic Rankine cycle (ORC) systems. Currently, experimental measurements of the speed of sound in cyclopentane at temperatures above 353 K are not available in the literature. In this study, the speed of sound in cyclopentane is measured by the Rayleigh–Brillouin scattering method. Using the existing experimental equipment, the data are measured along six isobaric lines from 2.0 to 10.0 MPa at a temperature range of 349.40 to 525.97 K. The expanded relative uncertainty of the speed of sound measured in this experiment can be estimated to be 0.86% with the confidence level of 0.95 (coverage factor k = 2). The average absolute relative deviation (AARD) between our experimental data and calculated values with the equation of state (EOS) proposed as mentioned in this paper in the liquid-phase region is 0.99%, which confirms the effectiveness of the experimental results and the accuracy of the EOS. Furthermore, the data on the speed of sound from experimental results and the literature for cyclopentane are also fitted into a correlation formula related to the temperature and pressure, facilitating engineering applications.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Weixia Zhi,Xinjie Guo,Yichu Nie,Lu Nie,Tingting He,Li Dai,Jing Xu,Xiangxin Zong,Jun Xu,Huaihong Cai,Yong Tang,Yanguang Cong,Jiang Pi,Youfeng Zhu,Pinghua Sun,Jialiang Guo,Huoqiang Chen,Xueqin Huang,Haibo Zhou
The current lack of rapid screening methods for Klebsiella pneumonia ( K. pneumonia ) poses a considerable threat to human health. Herein, we fabricated a multilayer Au@Au@Ag/Pt nanoparticle (NP) that made of the peroxidase-mimicking external shell and tunable plasmonic intra-nanogap as a versatile probe, and conjugated them with lateral flow immunoassay (LFIA) for colorimetric-catalytic-SERS (CM/CL/SERS) multi-model sensing K. pneumonia in complex biological matrix. After the optimization of several parameters, the limit of detection (LOD) of the target K. pneumonia were 10 3 CFU/mL for CL-LFIA and 38 CFU/mL for SERS-LFIA, both of which were over 10-fold and 200-fold more sensitive than the visual CM-LFIA (10 4 CFU/mL), respectively. The clinical validation of this multi-model LFIA was performed with the infected patients ( N = 6) and healthy subjects ( N = 3), among which 4 positive samples missed by conventional CM-LFIA were successfully identified by SERS-LFIA. More importantly, this LFIA has great specificity for the target bacteria, while showed no signal response to samples infected by other bacteria. Different from previous studies focusing on detection of protein and nucleic acid of K. pneumonia , our study shortened the sample-to-answer time with direct detection of K. pneumonia by LFIA, filling the diagnostic gap for point-of-care testing (POCT) of K. pneumonia infection. Overall, the great performance of our established LFIA suggested its substantial potential for diagnosis of K. pneumonia -induced nosocomial infection.
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DOI
高影响因子
Small
·
2025
·
IF 12.1
Mingyang Zhong,Tevin Li,Shouyi Yuan,Junwei Lucas Bao,Yonggang Wang
Small Quinone-based Organic Electrodes have received extensive attention. However, the rapid dissolution of small quinone electrode into electrolyte impede their practical applications. For example, Anthraquinone (AQ) and Phenanthrenequinone (PQ) molecules have been rarely reported for aqueous batteries due to the inferior electrochemical performance. Herein, a high-concentration hybrid electrolyte containing 1m Zn(OTF) 2 and 15m KOTF salts is introduced for small quinone electrode and investigate the redox behavior of PQ and AQ electrode is investigated in Zn 2+ /K + hybrid electrolyte. These findings reveal that AQ with carbonyl groups at para-position selectively stores proton rather than K + , while PQ with carbonyl group at ortho-position simultaneously stores proton and K + without selectivity. Moreover, the Zn(OTF) 2 salt serves as both proton buffer and binder to improve the cycle stability. Consequently, when PQ is paired with Zn metal anode for Zn || PQ batteries, the addition of potassium salt can improve the energy density of the Zn batteries. Moreover, when PQ is paired with Prussian blue cathode to assemble aqueous K-ion batteries, the addition of zinc salt in the electrolyte can improve the cycle stability via binding discharged PQ molecules with divalent-ions. This research provides an electrolyte engineering strategy to address the challenges facing PQ electrode for aqueous batteries.
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DOI
PubMed
高影响因子
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