INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Jiuli Han,Lu Bai,Haiyan Jiang,Shaojuan Zeng,Bingbing Yang,Yinge Bai,Xiangping Zhang
Ionic liquids (ILs) have become attractive in membranes for CO2 separation because of the designable structure, high CO2 affinity, and good compatibility and stability. Modification of metal–organic frameworks with ILs is an effective strategy to improve the gas separation performance of mixed matrix membranes (MMMs). In this work, task-specific ionic liquids (TSILs) were incorporated to prepare TSIL@ZIF-67/PIM-1 MMMs and improve CO2 separation performance because of the high CO2 solubility and great compatibility toward ZIF-67 and PIM-1. The TSILs (TMGHIM and TMGHPhO) selectively and reversibly interact with CO2 and improve the interfacial compatibility between ZIF-67 and PIM-1, leading to higher CO2/CH4 and CO2/N2 selectivities than that of the ZIF-67/PIM-1 MMM and the directly blended membrane (TSIL/ZIF-67/PIM-1). The 10 wt % TMGHIM@ZIF-67/PIM-1 MMM shows enhanced CO2/N2 and CO2/CH4 selectivities of 13.7 and 10.5, respectively; meanwhile, the CO2 permeability reaches 12,848.5 Barrer and is 2.5 times that of the pure PIM-1 membrane. The TSIL@ZIF-67/PIM-1 MMMs also show good stability against physical aging.
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高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2020
·Vol. 126
·期 11
·1-14
·
IF 1.81
Shi Feng,Xiao En-Cai,Chen Guohua,Chen Ying
Non-stoichiometric Nd[Mg 0.5 Sn 0.5(1+ x ) ]O 3 (− 0.04 ≤ x ≤ + 0.04)—type samples were prepared using a traditional two-step solid-state sintering process. Their crystal structures, phase compositions, dielectric properties and lattice vibrational characteristics were identified in detail. The double perovskite Nd(Mg 0.5 Sn 0.5 )O 3 with a monoclinic structure was distinguished as the main crystalline phase, and pure phase was obtained when x < 0. The sample [Nd(Mg 0.5 Sn 0.49 )O 3 ] at x = − 0.02 shows the excellent dielectric properties: ε r = 18.74, Q × f = 47,979 GHz. The lattice vibrational characteristics were clarified with Raman and infrared active mode spectroscopy. The intrinsic properties were fitted by four-parameter semi-quantum model, which show that the low-frequency infrared modes yield a more significant contribution to permittivity and dielectric loss. Raman shifts of modes F 2g (A) and F 2g (B) correlate with dielectric constants negatively, which implies that the bond length has a positive correlation with permittivity. Full widths at half maximum of vibrational modes A 1g (O) correlate with dielectric loss values positively and correlate with the degree of order ( S ) negatively.
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高影响因子
JOM
·
2020
·Vol. 72
·期 11
·3806-3811
·
IF 2.054
Li Min,Li Ying
In this work, we report an electrochemical route to directly reduce solid lead oxide (PbO) to lead in an acetamide-1-methylimidazolium trifluoromethylsulfonate (acetamide-MIMTfO) low-temperature molten salt. A cyclic voltammogram recorded using a graphite cavity electrode filled with PbO powder reveals that solid PbO can be directly electrochemically reduced to lead. Constant voltage electrolysis experiments with a PbO pellet cathode and a high-purity graphite anode were performed under different constant voltages (2.2–2.8 V) and at 343 K for different durations (2–6 h). XRD patterns of the electrolysis products confirm that the PbO pellet can be thoroughly reduced to lead after 6 h electrolysis. The present electrochemical route and acetamide-MIMTfO low-temperature molten salt can be used for extracting metals from their oxides at room temperature.
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高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2023
·
IF 5.7
Yongdi He,Jinou Song,Jiuzhong Yang,Yuan Zhuang,Liang Qiu,Zhijun Li,Shubao Song,Yongfeng Liu,Jibiao Xie
In order to investigate the species pool and primary channels of initiated pyrolysis of n- hexane, the low-pressure (30 Torr, 4.0 kPa) flow reactor pyrolysis of n- hexane initiated by 5% 1- nitropropane ( 1- NP) was studied experimentally in a wide range of temperature from 623 K to 1223 K. Combined with synchrotron vacuum ultraviolet (SVUV) photoionization mass spectra scanned at photon energies ranging from 9.0 to 14.7 eV and near-threshold photoionization efficiency (PIE) spectra, 29 pyrolysis species, covering C 1 –C 6 hydrocarbons and several pyrolysis species containing O or N atoms, were identified. Based on the ion signal intensities of the visible peaks in the mass spectra, the mole fraction profiles of all the experimental species were evaluated. The experimental results suggested that the initial pyrolysis temperature of n- hexane was reduced by approximately 275–325 K. On the basis of the mole fraction profiles and the initial formation temperatures reported in this work and rate coefficients proposed in previous studies, the 1- NP-initiated pyrolysis mechanisms of n- hexane were discussed. It was suggested that n- hexane was dominantly consumed by the H-abstraction reactions by the attack of OH radical in this work. The 1- NP-initiated pyrolysis of n- hexane mainly proceeded via reactions to produce C 3 H 6 + C 3 H 7 , or 1- C 4 H 8 + C 2 H 5 , or 1- C 5 H 10 + CH 3 .
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高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 4
·1302-1312
·
IF 8.067
Hui Tang,Xiang Niu,Peng-Fei Zhao,Xin-Gui Tang,Xiao-Dong Jian,Xian-Yi Chen,Xiao-Cao Peng,Zhi-Peng Yang,Sheng-Guo Lu
xBiFeO3–(1 − x)BaTiO3 relaxor ferroelectric ceramics were synthesized via the high-temperature solid-state reaction process. The X-ray diffraction patterns of xBiFeO3–(1 − x)BaTiO3 showed that the structure of samples was transformed from the tetragonal phase to the pseudo-cubic phase when x ≥ 0.025. The calculated universal Curie–Weiss constants and slim shape of the polarization-electric field hysteresis loops indicated that xBiFeO3–(1 − x)BaTiO3 ceramic was converted from a normal ferroelectric to a relaxor ferroelectric. The energy-storage properties of 0.1BiFeO3–0.9BaTiO3 were also measured at room temperature. The maximum discharged energy density and efficiency procured were 1.22 J cm−3 and 85.98%, respectively. The electric field-dependent energy-storage density was fitted using an exponential function of En, and it was found that n < 2. It was worth noting that the positive electrocaloric effect (ECE) was observed in xBiFeO3–(1 − x)BaTiO3 bulk ceramics, no matter when directly measured using a thermocouple or indirectly calculated using the Maxwell relation. Also, a ΔTmax of 1.55 K was indirectly calculated from the temperature-dependent P–E hysteresis loops for 0.05BiFeO3–0.95BaTiO3; while a ΔTmax of 2.20 K was directly obtained using the thermocouple. The positive ECE means that the xBiFeO3–(1 − x)BaTiO3 is a conventional ferroelectric or relaxor ferroelectric. Finally, the electrocaloric strengths measured were considered with the equation dT/dE obtained by Lu et al.
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高影响因子
FOOD AND CHEMICAL TOXICOLOGY
·
2014
·
IF 2.61
Chang Li,Shao-Ping Nie,Yong-qiang Zhou,Ming-Yong Xie
3-monochoropropane-1, 2-diol (3-MCPD) esters from edible oils are considered to be a possible risk factor for adverse effects in human. In the present study, the exposure assessment of 3-MCPD esters to Chinese population was performed. A total of 143 edible oil and fat samples collected from Chinese markets were determined for the concentrations of 3-MCPD esters. The concentration data together with the data of fats consumed were analyzed by the point evaluation and probabilistic assessment for the exposure assessment. The point evaluation showed that the mean daily intake (DI) of 3-MCPD esters were lower than the value of provisional maximum tolerable daily intake (PMTDI) of 3-MCPD (2 µg/kg BW/d). The mean DI values in different age groups obtained from probabilistic assessment were similar to the results of the point evaluation. However, in high percentiles (95th, 97.5th, 99th), the DI values in all age groups were undesirably higher than the value of PMTDI. Overall, the children and adolescents exposed more to 3-MCPD esters than the adults. Uncertainty was also analyzed for the exposure assessment. Decreasing the level of 3-MCPD esters in edible oils and consuming less oil were top priority to minimize the risk of 3-MCPD esters.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yingying Zhao,Beibei Zhang,Shaobo Duan,Yaqiong Li,Yuzhou Wang,Yongchao Wang,Juan Zhang,Rong Huang,Ru Jiang,Rui Zhang,Qi Zhou,Linlin Zhang,Xiaoxia Xu,Zesheng Li,Si Chen,Lianfeng Mo,Xu Zhang,Siyi Yang,Xiguo Cai,Lianzhong Zhang
Metabolic competition and accumulation of metabolic byproducts in the tumor microenvironment (TME) severely impair the antitumor functions of T cells, leading to suboptimal outcomes in cancer immunotherapy. To address these challenges, we developed an ultrasound-visualized methionine partitioning nano-modulator utilizing erythrocyte membrane-hybridized liposomes loaded with the glycolysis inhibitor lonidamine (LND) and small interfering RNA (siRNA) against methionine transporter solute carrier family 43, member 2 (SLC43A2). By downregulating SLC43A2 expression to reduce methionine uptake by tumor cells and suppressing tumor glycolysis to alleviate the acidic TME, the nano-modulator enhances methionine availability for T cells and improves T cell activity. Moreover, the oxygen-enriched perfluorohexane (PFH-O 2 ) loaded in the core of the nano-modulator alleviates tumor hypoxic, further reducing the glycolysis rate of tumor cells. Furthermore, ultrasound-triggered liquid-gas phase transitions enable real-time ultrasound contrast imaging for precise tumor visualization, while leveraging the ultrasonic cavitation effect to enhance drug penetration and release at the tumor site. In summary, this ultrasound-visualized methionine partitioning nano-modulator effectively reshapes tumor metabolism and immunosuppressive TME under ultrasound guidance, thereby significantly improving the efficacy of tumor immunotherapy. These findings demonstrate a promising strategy for enhancing immunotherapy outcomes through metabolic modulation and microenvironment regulation.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Yuxia Zhong,Zhihua Zhang,Min Zhang,Yujie Liao,Shudong Shi,Wenyao Chen,Liang Wang,Xinggui Zhou,Xuezhi Duan
The selective oxidation of alkanes is challenging due to the inertness of C–H bonds and the tendency for overoxidation to COx. Metal-zeolite catalysts offer a promising solution by spatially decoupling oxygen and C–H bond activation on distinct active sites. This study introduces a strategy using surface hydrophobic modification of titanium silicalite-1 (TS-1) zeolites to achieve high selectivity in propane oxidation to acetone. Hydrophobic organosilanes with methyl groups were applied via a one-step co-condensation process, followed by Au nanoparticle immobilization. The hydrophobic groups prolong the residence time of the intermediate isopropanol on the catalyst surface, enhancing its conversion to acetone while stabilizing H 2 O 2 to prevent excessive oxidation of carbon-containing species into CO 2 during the process. The modified TS-1 demonstrated excellent thermal stability and selectivity, particularly under extreme hydrogen-to-oxygen ratios conditions. The alkylated Au/TS-1 catalysts significantly improved acetone production, providing a new pathway for selective alkane oxidation.
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产品关联
DOI
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Qi Liu,Yihan Yin,Tong Luo,Min Xiao,Hongxia Gao,Wilfred Olson,Zhiwu Liang
Amine blend is a viable method to formulate superior absorbents for CO 2 capture from flue gas. However, the understanding of the degradation of blended amines, especially the interaction effect on the degradation pathway is limited, which restricts the solvent development. In this work, the oxidative degradation of 1-amino-2-propanol (1AP) and its blends with various tertiary amines is studied by analyzing amine loss, alkalinity loss, viscosity change, NH 3 emission, and heat-stable salt generation. Experimental results show that both triethanolamine and N -methyldiethanolamine have an excellent inhibition effect on 1AP oxidative degradation, reducing 1AP loss from 47.0% to 6.5% and 8.5%, respectively. The reaction pathways for the oxidative degradation of single and blended 1AP solutions are proposed and evaluated by density functional theory calculations. Computational results show that the reactions between 1AP peroxide radicals and peroxide radicals of tertiary amines reduce 1AP loss, which agrees with experimental results.
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产品关联
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高影响因子
TALANTA
·
2022
·
IF 6.556
Shuang Tan,Shunling Li,Congkui Tang,Xiongfei Bai,Xin Ran,Qing Qu,Lei Li,Long Yang
The conventional fluorescence analysis methods for disease identification are vulnerable to the restriction with false-positive. Here, a fluorescent switch with high efficiency and regeneration by the black phosphorus (BP) nanosheets-regulated was developed to overcome false-positive issue in the assay of β- amyloid 1−42 oligomers (A β ) process. The A β was rapidly recognized using the fluorescent emitter‐nitrogen-doped carbon nanodots (N-CDs) under the regulation of BP nanosheets , while the N-CDs alone cannot recognize A β without the introduction of BP. The fluorescence analysis methods exhibited a wide sensing range of 0.25–15.0 ng/mL and a low detection limit of 83 pg/mL for A β analysis, which was superior to the reported fluorescence analysis method. Further, BP nanosheets were recycled, demonstrating the fluorescent switch with highly efficient, stable, and regenerable. This provides a new idea for developing high-efficiency and high-precision fluorescence detection platform.
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DOI
PubMed
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 2.463
Weijie Liu,Liang Liu,Cong Liu,Yan Hao,Hao Yang,Bo Yuan,Jihong Jiang
Azo dyes are recalcitrant pollutants that constitute a significant burden to the environment. This study focused on decoloring azo dye Congo red using Shewanella oneidensis MR-1 and exploring methylene blue as electron shuttle to enhance its decolorization and detoxication efficiency. The effects of physicochemical parameters on anaerobic decolorization were investigated. The results showed that the suitable pH, temperature and NaCl concentration range for decolorization were 6.0–8.5, 28–40 °C and 0–20 g/L, respectively. Under the optimal conditions, 99.25% decolorization of up to 2 g/L Congo red was achieved within 24 h. Nitrite, nitrate and oxygen could significantly inhibit the decolorization. Riboflavin and methylene blue were found to be able to significantly accelerate decolorization capacity of S. oneidensis MR-1, however, block of Mtr respiratory pathway depressed the promotion effects of riboflavin and methylene blue, suggesting that the promotion effect was achieved by accelerating electron transfer between cells and dyes. Furthermore, the phytotoxicity analysis revealed that the toxicity of Congo red to Triticum aestivum , Pogostemon cablin and Isatis indigotica Fort was decreased during the decolorization process.
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高影响因子
International Journal of Environmental Research and Public Health
·
2018
·Vol. 15
·期 9
·1907
·
IF 2.145
Wen-Qian Wang,Hai-Xin Duan,Zhou-Tao Pei,Rou-Rou Xu,Ze-Tian Qin,Guang-Can Zhu,Li-Wei Sun
Ultraviolet absorbing chemicals (UV filters) are widely used in personal care products for protecting human skin and hair from damage by UV radiation. Although these substances are released into the environment during production and consumption processes, little is known about their genotoxicity effects. Our previous studies have shown that benzophenone-type UV filters exhibited acute toxicity on three species of aquatic organisms. Mutagenesis by benzophenone (BP) and benzophenone-1(BP-1) was tested in the present study by theSalmonella typhimurium/reverse mutation assay (Ames assay). All the positive reverse mutations occurred in the absence of the S9 liver extract system for both chemicals. From BP, positive mutation effects on the TA102 strain at doses of 0.05 μg/plate and 0.5 μg/plate were detected. From BP-1, positive mutation effects on the TA97 strain at doses of 0.05 μg/plate and 0.5 μg/plate, and on the TA100 strain at a dose of 0.5 μg/plate, were detected. A mixture of BP and BP-1 exhibited mutagenicity on the TA97 and TA100 strains. For the TA97 strain, the positive mutation results were detected at 10% and 50% of the mixture. For the TA100 strain, the results were detected when the mixture was at 5% and 10%. In the mixture at 5%, the concentrations of BP and BP-1 were 3.5 μg/plate and 14 μg/plate, respectively. In the 10% mixture, the doses of BP and BP-1 were 7 μg/plate and 28 μg/plate, respectively. In the 50% mixture, the doses of BP and BP-1 were 35 μg/plate and 140 μg/plate, respectively. The mixture test results suggested that there was antagonism in mutagenicity between BP and BP-1.
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高影响因子
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