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学者姓名：赵素英
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Abstract ：
Micromixing efficiency is an important parameter for evaluating the multiphase mass transfer performance and reaction efficiency of microreactors. In this work, the novel curved capillary reactor with different shapes was designed to generate Dean flow, which was used to enhance the liquid -liquid micromixing performance. The Villermaux-Dushman probe reaction was employed to characterize the micromixing performance in different curved capillary microreactors. The effects of experiment parameters such as liquid flow rate, inner diameter, tube length, and curve diameter on micromixing performance were systematically investigated. Under the optimal conditions, the minimum value of the segmentation factor X-S was 0.008. It was worth noting that at the low Reynolds number (Re < 30), the change of curved shape on the capillary microreactor can significantly improve the micromixing performance with X-S reduced by 37.5%. Further, the correlations of segment index X-S with dimensionless factor such as Reynolds number or Dean number were developed, which can be used to predict the liquidliquid micromixing performance in capillary microreactors.
Keyword ：
Dean flow Dean flow Micromixing performance Micromixing performance Microreactor Microreactor Process intensification Process intensification
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| GB/T 7714 | Wu, Shaoyun , Ma, Zhuang , Yang, Zichi et al. Enhancement of liquid-liquid micromixing performance in curved capillary microreactor by generation of Dean vortices [J]. | CHINESE JOURNAL OF CHEMICAL ENGINEERING , 2024 , 68 : 76-82 . |
| MLA | Wu, Shaoyun et al. "Enhancement of liquid-liquid micromixing performance in curved capillary microreactor by generation of Dean vortices" . | CHINESE JOURNAL OF CHEMICAL ENGINEERING 68 (2024) : 76-82 . |
| APA | Wu, Shaoyun , Ma, Zhuang , Yang, Zichi , Zhao, Suying , Zhou, Caijin , Zheng, Huidong . Enhancement of liquid-liquid micromixing performance in curved capillary microreactor by generation of Dean vortices . | CHINESE JOURNAL OF CHEMICAL ENGINEERING , 2024 , 68 , 76-82 . |
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In the field of biomemorizers, the simultaneous enhancement of resistive switching (RS) performance and environmental robustness, and the understanding the RS mechanism involving interfacial interaction is still challengeable. Herein, the bio-composites by encapsulating graphene (GR), graphene oxide (GO) and reduced graphene oxide (RGO) into chitosan (CS) have been fabricated as memory devices with the structure of FTO/biocomposite/Ag. Among them, FTO/GO@CS(12 %)/Ag biomemorizer exhibits the best RS performance with high ON/OFF ratio (10 5.92 ), and it possesses good thermal (170 degrees C) and irradiation stabilities (UV exposure for 96 h). The RS mechanism is due to the migration of oxygen vacancies accompanied by formation of Ag conducting filaments in the bio-composite films. Therefore, the enhanced resistive switching performance after encapsulating into CS can be explained as the increment of defects, the higher current densities and quenched radicals. Specially, for the first time we find the presence of voltage -induced packing mode changes in GO@CS composite, which can facilitate the migration of oxygen vacancies and render its best RS performance. In all, the more carboxyl groups can strengthen the GO -CS interfacial interactions through the formation of stable hydrogen bonding network and covalent bonds, which can enhance the stabilities and makes the composites be more sensitive to electrical stimulus. The rules drawn in this work will be significant for the construction of new biomemorizers with good environmental robustness.
Keyword ：
Biomemorizer Biomemorizer Chitosan Chitosan Environmental robustness Environmental robustness Graphene derivant Graphene derivant Resistive switching mechanism Resistive switching mechanism
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| GB/T 7714 | Zheng, Mei -Qin , Yi, Hong -Mei , Yu, Guo et al. Graphene derivant@chitosan composite-based biomemorizers: The effect of functional groups on the resistive switching performances and their thermal/irradiative stabilities [J]. | DIAMOND AND RELATED MATERIALS , 2024 , 146 . |
| MLA | Zheng, Mei -Qin et al. "Graphene derivant@chitosan composite-based biomemorizers: The effect of functional groups on the resistive switching performances and their thermal/irradiative stabilities" . | DIAMOND AND RELATED MATERIALS 146 (2024) . |
| APA | Zheng, Mei -Qin , Yi, Hong -Mei , Yu, Guo , Wang, Jia-Wei , Lv, Zhou -Lin , Li, Hui -Fang et al. Graphene derivant@chitosan composite-based biomemorizers: The effect of functional groups on the resistive switching performances and their thermal/irradiative stabilities . | DIAMOND AND RELATED MATERIALS , 2024 , 146 . |
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Electrochemical ammonia synthesis has advantages over the conventional Haber-Bosch process in terms of environment friendliness, sustainability, and cleanliness. However, this process is facing challenges such as low ammonia yield and low Faraday efficiency due to the low solubility and the difficulty in activation of nitrogen in aqueous solutions. To overcome these limitations, finding a catalyst of high efficiency, stability, and selectivity is crucial. Inspired by the concept of noble metal doping and two-dimensional layered catalysts, we have designed a novel catalyst for nitrogen reduction by incorporating ruthenium into lanthanum sulfide. In this context, the inclusion of ruthenium serves to optimize the electron transfer interface, enhance the low conductivity of lanthanum sulfide, and increase the number of active sites. Furthermore, the synergistic effect between the ruthenium and lanthanum ions significantly improves the activity of the catalyst. As a catalyst for the N-2 reduction reaction (NRR), Ru/La2S3 demonstrates a superior NH3 formation rate of 19.40 mu g h(-1) mg(cat)(-1) and a faradaic efficiency of 7.77% at -0.5 V versus the reversible hydrogen electrode (RHE). These values are significantly higher compared to those of La2O3 (1.4%; 12.5 mu g h(-1) mg(cat)(-1)) and La2S3 (2.3%; 10.7 mu g h(-1) mg(cat)(-1)), and most reported values in this field.
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| GB/T 7714 | Yingshu, Wang , Hong, Wang , Yixin, Tang et al. Ru/La2S3 nanorods as an electrocatalyst for efficient N-2 fixation under ambient conditions [J]. | REACTION CHEMISTRY & ENGINEERING , 2023 , 8 (8) : 2011-2021 . |
| MLA | Yingshu, Wang et al. "Ru/La2S3 nanorods as an electrocatalyst for efficient N-2 fixation under ambient conditions" . | REACTION CHEMISTRY & ENGINEERING 8 . 8 (2023) : 2011-2021 . |
| APA | Yingshu, Wang , Hong, Wang , Yixin, Tang , Yu, Shu , Suying, Zhao , Lu, Hong et al. Ru/La2S3 nanorods as an electrocatalyst for efficient N-2 fixation under ambient conditions . | REACTION CHEMISTRY & ENGINEERING , 2023 , 8 (8) , 2011-2021 . |
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Background: Unbaffled U-shaped mesoscale oscillatory flow reactors (meso-OFRs) are able to achieve low pressure drop, good plug flow and micromixing performance simultaneously at laminar net flow conditions under a wide "operating windows".Method: We focus on the macromixing and micromixing behaviours of unbaffled meso-OFR, where the net flow and oscillation conditions were in the wide range of Ren=17-51 and Reo=16-1350, respectively.Significant findings: The good plug flow and micromixing performance could be achieved simultaneously at low oscillation intensity with the wide "operating windows" of psi<47. It was believed that oscillatory motion led to periodic destruction and reformation of vortices, as the oscillation intensity increased, the large-scale vortices were decomposed into small-scale vortices, resulting in backmixing or axial dispersion. Meanwhile, the empirical formula of micromixing time and velocity ratio in accordance with the power-law relationship was established: tm/t = 0.00277 psi 0.51658. Finally, the oscillatory mechanism was qualitatively validated by Computational Fluid Dynamics (CFD).
Keyword ：
CFD CFD Macromixing Macromixing Meso-OFR Meso-OFR Micromixing Micromixing Vortices Vortices
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| GB/T 7714 | Zheng, Meiqin , Yao, Wei , Tian, Linda et al. Characterization of macromixing and micromixing performance of unbaffled U-shaped mesoscale oscillatory flow reactor [J]. | JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS , 2023 , 145 . |
| MLA | Zheng, Meiqin et al. "Characterization of macromixing and micromixing performance of unbaffled U-shaped mesoscale oscillatory flow reactor" . | JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS 145 (2023) . |
| APA | Zheng, Meiqin , Yao, Wei , Tian, Linda , Zhao, Suying , Zhou, Caijin , Zheng, Huidong et al. Characterization of macromixing and micromixing performance of unbaffled U-shaped mesoscale oscillatory flow reactor . | JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS , 2023 , 145 . |
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本发明提供了一种蔗糖‑6‑乙酸酯脱酸提纯的方法，包括如下步骤：将蔗糖和醋酐酯化反应后生成的蔗糖‑6‑乙酸酯反应液输送至精馏塔中精馏浓缩，塔顶得到不含乙酸的DMF和水，塔底得到蔗糖‑6‑乙酸酯的浓缩液。向浓缩液中加入共晶溶剂，得到蔗糖‑6‑乙酸酯与乙酸的共晶体。将提纯后的蔗糖‑6‑乙酸酯共晶体固体用DMF进行溶解，再利用支撑液膜对蔗糖‑6‑乙酸酯溶液中的乙酸进行萃取，从而得到不含乙酸的高纯度蔗糖‑6‑乙酸酯，同时利用反萃取剂进行反萃，得到乙酸盐副产品。本发明完美解决了酯化反应液乙酸难脱除以及蔗糖‑6‑乙酸酯难提纯的问题，具有更高的工业运用价值。
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| GB/T 7714 | 揭会民 , 郑辉东 , 李浩宏 et al. 一种蔗糖-6-乙酸酯脱酸提纯的方法 : CN202310187287.2[P]. | 2023-03-02 00:00:00 . |
| MLA | 揭会民 et al. "一种蔗糖-6-乙酸酯脱酸提纯的方法" : CN202310187287.2. | 2023-03-02 00:00:00 . |
| APA | 揭会民 , 郑辉东 , 李浩宏 , 陈小平 , 陈晶晶 , 王莹淑 et al. 一种蔗糖-6-乙酸酯脱酸提纯的方法 : CN202310187287.2. | 2023-03-02 00:00:00 . |
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D-Allulose is an ultra-low calorie sweetener with broad market prospects. As an alternative to Izumoring, phosphorylation-dephosphorylation is a promising method for D-allulose synthesis due to its high conversion of substrate, which has been preliminarily attempted in enzymatic systems. However, in vitro phosphorylation-dephosphorylation requires polyphosphate as a phosphate donor and cannot completely deplete the substrate, which may limit its application in industry. Here, we designed and constructed a metabolic pathway in Escherichia coli for producing D-allulose from D-fructose via in vivo phosphorylation-dephosphorylation. PtsG-F and Mak were used to replace the fructose phosphotransferase systems (PTS) for uptake and phosphorylation of D-fructose to fructose-6-phosphate, which was then converted to D-allulose by AlsE and A6PP. The D-allulose titer reached 0.35 g/L and the yield was 0.16 g/g. Further block of the carbon flux into the Embden-Meyerhof-Parnas (EMP) pathway and introduction of an ATP regeneration system obviously improved fermentation performance, increasing the titer and yield of D-allulose to 1.23 g/L and 0.68 g/g, respectively. The E. coli cell factory cultured in M9 medium with glycerol as a carbon source achieved a D-allulose titer of approximate to 1.59 g/L and a yield of approximate to 0.72 g/g on D-fructose.
Keyword ：
cell factory cell factory D-allulose D-allulose Escherichia coli Escherichia coli fermentation fermentation metabolic engineering metabolic engineering
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| GB/T 7714 | Guo, Qiang , Liu, Chen-Yang , Zheng, Ling-Jie et al. Metabolically Engineered Escherichia coli for Conversion of D-Fructose to D-Allulose via Phosphorylation-Dephosphorylation [J]. | FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY , 2022 , 10 . |
| MLA | Guo, Qiang et al. "Metabolically Engineered Escherichia coli for Conversion of D-Fructose to D-Allulose via Phosphorylation-Dephosphorylation" . | FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY 10 (2022) . |
| APA | Guo, Qiang , Liu, Chen-Yang , Zheng, Ling-Jie , Zheng, Shang-He , Zhang, Ya-Xing , Zhao, Su-Ying et al. Metabolically Engineered Escherichia coli for Conversion of D-Fructose to D-Allulose via Phosphorylation-Dephosphorylation . | FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY , 2022 , 10 . |
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D-Allulose is a rare hexose with great application potential, owing to its moderate sweetness, low energy, and unique physiological functions. The current strategies for D-allulose production, whether industrialized or under development, utilize six-carbon sugars such as D-glucose or D-fructose as a substrate and are usually based on the principle of reversible Izumoring epimerization. In this work, we designed a novel route that coupled the pathways of methanol reduction, pentose phosphate (PP), ribulose monophosphate (RuMP), and allulose monophosphate (AuMP) for Escherichia coli to irreversibly synthesize D-allulose from D-xylose and methanol. After improving the expression of AlsE by SUMO fusion and regulating the carbon fluxes by knockout of FrmRAB, RpiA, PfkA, and PfkB, the titer of D-allulose in fed-batch fermentation reached 70.7 mM, with a yield of 0.471 mM/ mM on D-xylose or 0.512 mM/mM on methanol.
Keyword ：
cell factory cell factory d-allulose d-allulose Escherichia coli Escherichia coli fermentation fermentation metabolic engineering metabolic engineering
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| GB/T 7714 | Guo, Qiang , Liu, Mei-Ming , Zheng, Shang-He et al. Methanol-Dependent Carbon Fixation for Irreversible Synthesis of D-Allulose from D-Xylose by Engineered Escherichia coli [J]. | JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY , 2022 . |
| MLA | Guo, Qiang et al. "Methanol-Dependent Carbon Fixation for Irreversible Synthesis of D-Allulose from D-Xylose by Engineered Escherichia coli" . | JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY (2022) . |
| APA | Guo, Qiang , Liu, Mei-Ming , Zheng, Shang-He , Zheng, Ling-Jie , Ma, Qian , Cheng, Ying-Kai et al. Methanol-Dependent Carbon Fixation for Irreversible Synthesis of D-Allulose from D-Xylose by Engineered Escherichia coli . | JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY , 2022 . |
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本发明公开了一种用于二硝基甲苯选择性加氢的Pd‑Pt/C催化剂的制备方法，属于催化加氢技术领域。其是以炭黑为载体，先制备出Pt/C催化剂，然后利用电化学置换反应，采用Pd2+置换出Pt/C催化剂中的部分Pt原子，从而制得所述Pd‑Pt/C催化剂。本发明利用Pd2+/Pd和PtCl2‑/Pt之间的氧化还原电势差，用Pd2+置换出Pt/C催化剂上部分的Pt原子，从而在炭黑载体表面形成明确结构的PdPt合金，所得具有PdPt合金结构的双金属催化剂中Pd用量少，但在二硝基甲苯选择性加氢制备甲苯二胺反应中仍具有良好的催化性能，因而具有较好应用前景。
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| GB/T 7714 | 吴丹 , 武康 , 赵素英 et al. 一种用于二硝基甲苯选择性加氢的Pd-Pt/C催化剂的制备方法 : CN202110477286.2[P]. | 2021-04-30 . |
| MLA | 吴丹 et al. "一种用于二硝基甲苯选择性加氢的Pd-Pt/C催化剂的制备方法" : CN202110477286.2. | 2021-04-30 . |
| APA | 吴丹 , 武康 , 赵素英 , 郑辉东 , 丘燕辉 . 一种用于二硝基甲苯选择性加氢的Pd-Pt/C催化剂的制备方法 : CN202110477286.2. | 2021-04-30 . |
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The solubility of borneol, camphor, and isoborneol in four solvents (i.e., acetone, ethanol, p-cymene, and p-xylene) was measured by the static equilibrium method within the temperature range of 296.65-348.85 K under the atmosphere. The fusion points and fusion enthalpies of borneol and isoborneol were determined by differential scanning calorimetry. The Apelblat equation, Wilson model, and NRTL model were employed to correlate the measured solubility data, and the NRTL model fits the measured data better. Mixing properties of each solute-solvent pair are calculated by the NRTL model.
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| GB/T 7714 | Chen, Jingjing , He, Jingjing , Li, Ningxin et al. Determination and Correlation of Solubility of Borneo!, Camphor, and Isoborneol in Different Solvents [J]. | JOURNAL OF CHEMICAL AND ENGINEERING DATA , 2019 , 64 (4) : 1826-1833 . |
| MLA | Chen, Jingjing et al. "Determination and Correlation of Solubility of Borneo!, Camphor, and Isoborneol in Different Solvents" . | JOURNAL OF CHEMICAL AND ENGINEERING DATA 64 . 4 (2019) : 1826-1833 . |
| APA | Chen, Jingjing , He, Jingjing , Li, Ningxin , Zheng, Huidong , Zhao, Suying . Determination and Correlation of Solubility of Borneo!, Camphor, and Isoborneol in Different Solvents . | JOURNAL OF CHEMICAL AND ENGINEERING DATA , 2019 , 64 (4) , 1826-1833 . |
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Several Cu/ZnO/Al2O3 catalysts with high Cu and ZnO contents were used to study the influence of solvent polarity on the dehydrogenation and dehydration of isoborneol. The employment of a polar solvent enhanced the activity for the main dehydrogenation reaction, while the use of a non-polar solvent favored the dehydration side-reaction. Different techniques were employed to characterize the fresh, treated, and spent catalysts. X-ray powder diffraction (XRD) showed that the copper was in metallic form and zinc in oxide form, transmission electron microscope (TEM) showed differences in catalyst morphology that depended on the polarity of the solvent used, N2O titration gave the Cu active site density, and temperature-programmed desorption of NH3 (NH3-TPD) provided the acidity of the materials. The characterization results indicated that in non-polar solvents the copper nanoparticles were sintered and this may have been due to the enhanced activity of adventitious water in those solvents or simply because of interactions between the solvents and the copper and zinc oxide components. The sintering resulted in a decrease in the number of active sites and an increase in acidic sites, which enhanced the undesired dehydration reaction. Based on the results of inductively coupled plasma (ICP) and TEM, a model of the catalyst was proposed to illustrate the effect of solvent polarity on the dehydrogenation of isoborneol.
Keyword ：
Cu/ZnO/Al2O3 catalyst Cu/ZnO/Al2O3 catalyst Dehydration Dehydration Dehydrogenation Dehydrogenation Isoborneol Isoborneol Solvent polarity Solvent polarity
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| GB/T 7714 | Zheng, Huidong , Lin, Yi , Wang, Mengchan et al. The influence of solvent polarity on the dehydrogenation of isoborneol over a Cu/ZnO/Al2O3 catalyst [J]. | CATALYSIS TODAY , 2019 , 323 : 44-53 . |
| MLA | Zheng, Huidong et al. "The influence of solvent polarity on the dehydrogenation of isoborneol over a Cu/ZnO/Al2O3 catalyst" . | CATALYSIS TODAY 323 (2019) : 44-53 . |
| APA | Zheng, Huidong , Lin, Yi , Wang, Mengchan , Liu, Jie , Wu, Dan , Chen, Jingjing et al. The influence of solvent polarity on the dehydrogenation of isoborneol over a Cu/ZnO/Al2O3 catalyst . | CATALYSIS TODAY , 2019 , 323 , 44-53 . |
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