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学者姓名：郑辉东
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The development of green high-density memristors is urgent for the coming big-data era. In this work, the graphitization degree of the nanodiamond (ND) was modulated by thermal annealing at different temperatures. Consequently, the graphitizing transformation from the ND structure to partial onion-like carbon (OLC-1) and complete OLC-2 was achieved, which has been validated by increased sp2/sp3 ratios and carbonyl contents. Furthermore, these carbon materials were encapsulated into chitosan (CS) to prepare ND or OLCs@CS biocomposites, which were further fabricated as memory devices. For ND-based memristors, only binary resistive switching (RS) behavior was detected, and the doping amount of 16% OLC-1 into CS resulted in ternary RS performance (ON1/OFF ratio of 3.12 x 104, ON2/OFF ratio of 1.38 x 106, and V Set1 and V Set2 of 0.89 and 1.58 V, respectively). Comparably, for OLC-2, only a 4% doping concentration presented excellent ternary RS performance, and the optimal RS parameters were achieved at a doping concentration of 12% (ON1/OFF ratio of 4.20 x 104, ON2/OFF ratio of 2.46 x 106, V Set1 and V Set2 of 0.70 and 1.97 V, respectively, and ternary yield of 62%). RS mechanisms have been explained as follows. In OLC-2, the disappearance of hydroxyl/carboxyl and the higher carbonyl content rendered weaker O-H center dot center dot center dot O=C hydrogen bonds, which facilitated the trap filling limiting (TFL) process. The larger conjugated degree of quasi-spherical graphitic layers enhanced the charge trapping capacity in the space charge limiting conduction (SCLC) process. The modulation rules of carbon materials will provide a theoretical guide for the construction of new green high-density memristors.
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| GB/T 7714 | Ren, Gengbiao , Zhu, Liang , Liang, Junwei et al. Elevation from Binary to Ternary Resistive Switching Behaviors by Graphitizing Transformation from Nanodiamond to Onion-like Carbon in Their Chitosan Composites [J]. | JOURNAL OF PHYSICAL CHEMISTRY LETTERS , 2025 , 16 (29) : 7322-7330 . |
| MLA | Ren, Gengbiao et al. "Elevation from Binary to Ternary Resistive Switching Behaviors by Graphitizing Transformation from Nanodiamond to Onion-like Carbon in Their Chitosan Composites" . | JOURNAL OF PHYSICAL CHEMISTRY LETTERS 16 . 29 (2025) : 7322-7330 . |
| APA | Ren, Gengbiao , Zhu, Liang , Liang, Junwei , Yi, Hongmei , Liu, Yuanzheng , Chen, Jingjing et al. Elevation from Binary to Ternary Resistive Switching Behaviors by Graphitizing Transformation from Nanodiamond to Onion-like Carbon in Their Chitosan Composites . | JOURNAL OF PHYSICAL CHEMISTRY LETTERS , 2025 , 16 (29) , 7322-7330 . |
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The design of highly stable and active bifunctional catalysts for electrolytic water remains a significant challenge. In this study, self-supported CoP/CNT/Ni2P bifunctional catalysts with three-phase heterojunction nano- structures were constructed by a multi-step electrodeposition and phosphorylation strategy. X-ray diffraction analysis and transmission electron microscope showed that CoP/CNT/Ni2P was a three-phase heterojunction nanostructure, and scanning electron microscope results of CoP/CNT/Ni2P suggested the successful introduction of carbon nanotube (CNT). The X-ray photoelectron spectroscopy results indicate a shift in the elemental binding energy in CoP/CNT/Ni2P, which is believed to contribute to the electrocatalytic reaction. The incorporation of CNT enhances charge transfer within the multiphase catalyst and maximizes the exposure of catalytically active sites, achieving an increase in catalyst performance. As anticipated, the CoP/CNT/Ni2P catalyst displays high catalytic activity for both the hydrogen evolution reaction (61 mV at 10 mA cm_ 2 ) and the oxygen evolution reaction (342 mV at 100 mA cm_ 2 ), in addition to exhibiting long-term stability at a current density of 10 mA cm_ 2 over 40 h. The electrolyzer comprising CoP/CNT/Ni2P(+,_) necessitates a modest operating voltage of 1.52 V to attain 10 mA cm_ 2 during alkaline water splitting, thereby outperforming the commercial catalyst Pt/C|| IrO2 and earlier reports. This study provides guidance for the development of ultra-high activity and durability catalysts for water splitting.
Keyword ：
Bifunctional electrocatalysts Bifunctional electrocatalysts CNT CNT Hydrogen evolution reaction Hydrogen evolution reaction Overall water splitting Overall water splitting
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| GB/T 7714 | Yu, Guo , Zhao, Jiaxiang , Hou, Songjia et al. Mutual promotion of CoP/CNT/Ni2P by heterojunction structural design and intrinsic activity coupling for water splitting [J]. | FUEL , 2025 , 382 . |
| MLA | Yu, Guo et al. "Mutual promotion of CoP/CNT/Ni2P by heterojunction structural design and intrinsic activity coupling for water splitting" . | FUEL 382 (2025) . |
| APA | Yu, Guo , Zhao, Jiaxiang , Hou, Songjia , Han, Haoyang , Zhou, Qing , Yan, Zuoyi et al. Mutual promotion of CoP/CNT/Ni2P by heterojunction structural design and intrinsic activity coupling for water splitting . | FUEL , 2025 , 382 . |
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Drying process is inevitable for torrefaction of nature biomass which contains considerable moisture. Drying process would retard the temperature building of biomass during superheated steam (SHS) torrefaction and hence affect the torrefaction process as well as change the properties of products. Feedstocks with different moisture contents were torrefied to develop a drying model to describe the SHS drying process and predicate the temperature of feedstock. Torrefied biomass was analyzed to get its physicochemical properties, pyrolysis behaviors, and combustion performance. It was found that torrefaction would occur during the drying process. The drying process can be roughly divided into three stages: the rapid cooling stage, the rapid heating stage, and the stable heating stage. The rapid cooling stage and rapid heating stage are dominated by drying processes, while the stable heating stage is usually accompanied by a severe torrefaction process. Wet feedstock need longer residence time to achieve equivalent physicochemical properties and pyrolysis behaviors as that of dry feedstock. The HHV of dry sample could be increased by 40.8 %, and that of wet sample also could be increased by 34.77%. However, the combustion behaviors of the products have changed after the thermal treatment. It is found that ignition and burnout temperatures of SHS torrefied biomass were greatly affected by the initial moisture content in feedstock.
Keyword ：
Combustion behaviors Combustion behaviors Drying process modeling Drying process modeling Pyrolysis behaviors Pyrolysis behaviors Superheated steam drying Superheated steam drying Superheated steam torrefaction Superheated steam torrefaction
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| GB/T 7714 | Yan, Zuoyi , Han, Peilin , Li, Huan et al. Superheated steam drying and torrefaction of wet biomass: The effect on products characteristics [J]. | FUEL , 2025 , 388 . |
| MLA | Yan, Zuoyi et al. "Superheated steam drying and torrefaction of wet biomass: The effect on products characteristics" . | FUEL 388 (2025) . |
| APA | Yan, Zuoyi , Han, Peilin , Li, Huan , Zheng, Huidong , Zhang, Dongdong . Superheated steam drying and torrefaction of wet biomass: The effect on products characteristics . | FUEL , 2025 , 388 . |
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Bis(fluorosulfonyl)imide triethylamine salt (FSI-HNEt3) is a crucial intermediate for the synthesis of next-generation electrolyte lithium bis(fluorosulfonyl)imide (LiFSI). The NH3-SO2F2-NEt3 route represents a promising approach for LiFSI production but faces challenges, including low efficiency and obscure reaction mechanisms. In this study, we optimize the synthesis of FSI-HNEt3 using NH3-SO2F2-NEt3 route and propose a new process. By capturing the sulfur-fluorine exchange (SuFEx) reaction intermediate with a novel molecular sieve-based method, we clarify the reaction mechanism with direct evidence. The primary mechanism involves a two-step SuFEx process, and we establish the complete pathways for both main and side reactions. Our study further reveals that hydrolysis and self-polymerization reactions during synthesis significantly reduce the yield of FSI-HNEt3. Density functional theory (DFT) calculations demonstrate how triethylamine (NEt3) enhances the nucleophilicity of reactants, confirming the two-step SuFEx mechanism and providing insights into the overall reaction system. These findings offer valuable guidance for the safe and efficient synthesis of FSI-HNEt3.
Keyword ：
DFT calculations DFT calculations FSI-HNEt3 FSI-HNEt3 Nucleophilicity Nucleophilicity Reaction mechanism Reaction mechanism SuFEx process SuFEx process
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| GB/T 7714 | Xia, Chengxuan , Wang, Shang , Ren, Fengjiao et al. Optimization of the synthesis of Bis(fluorosulfonyl)imide triethylamine and mechanistic clarification through capturing the SuFEx intermediate [J]. | MATERIALS TODAY CHEMISTRY , 2025 , 45 . |
| MLA | Xia, Chengxuan et al. "Optimization of the synthesis of Bis(fluorosulfonyl)imide triethylamine and mechanistic clarification through capturing the SuFEx intermediate" . | MATERIALS TODAY CHEMISTRY 45 (2025) . |
| APA | Xia, Chengxuan , Wang, Shang , Ren, Fengjiao , Zhou, Shouquan , Zhang, Siyu , Wu, Bin et al. Optimization of the synthesis of Bis(fluorosulfonyl)imide triethylamine and mechanistic clarification through capturing the SuFEx intermediate . | MATERIALS TODAY CHEMISTRY , 2025 , 45 . |
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d-Allose has great potential for application in the food and pharmaceutical industries owing to its remarkable physiological properties. Most studies on d-allose production have primarily focused on enzyme catalysis using the Izumoring strategy, which typically requires the use of expensive d-allulose as a substrate. Herein, a metabolically engineered strain of Escherichia coli was developed to synthesize d-allose directly from inexpensive d-glucose. The synthesis pathway was systematically optimized through a modular metabolic engineering. The functionality of the isomerases involved in the conversion of d-allulose to d-allose was confirmed in vivo, while the byproduct and transporter pathways were blocked to positively pull the reversible epimerization. Gene knockouts were employed to weaken glycolytic pathways, redirecting the carbon flux toward product synthesis. Additionally, the nonphosphorylated transport of d-glucose was introduced to enhance substrate utilization. In fed-batch fermentation, the engineered strain achieved a d-allose titer of 4.17 g/L, with a yield of 0.103 g/g from d-glucose. Our achievements are expected to advance the industrial production of d-allose, and this strategy is also applicable for producing other rare sugars.
Keyword ：
cell factory cell factory D-allose D-allose Escherichia coli Escherichia coli metabolic engineering metabolic engineering
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| GB/T 7714 | Guo, Qiang , Zhang, Meng-Jun , Zheng, Ling-Jie et al. Enhanced Synthesis of Rare d-Allose from d-Glucose by Positively Pulling and Forcing Reversible Epimerization in Engineered Escherichia coli [J]. | JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY , 2025 , 73 (10) : 6072-6080 . |
| MLA | Guo, Qiang et al. "Enhanced Synthesis of Rare d-Allose from d-Glucose by Positively Pulling and Forcing Reversible Epimerization in Engineered Escherichia coli" . | JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 73 . 10 (2025) : 6072-6080 . |
| APA | Guo, Qiang , Zhang, Meng-Jun , Zheng, Ling-Jie , Chen, Wei-Xiang , Zheng, Huidong , Fan, Li-Hai . Enhanced Synthesis of Rare d-Allose from d-Glucose by Positively Pulling and Forcing Reversible Epimerization in Engineered Escherichia coli . | JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY , 2025 , 73 (10) , 6072-6080 . |
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The simultaneous achievements of lower aspect ratio and larger crystal size is urgent for the production of high-quality sucralose. In this work, non-toxic ethanol-based anti-solvent crystallization (ASC) of sucralose was conducted, during which carboxylic acids bearing different alkyl lengths (isovaleric acid (IVA), hexanoic acid (HNA), octanoic acid (ONA), decanoic acid (DNA)) were used as anti-solvents. The longer alkyl lengths of carboxylic acids can render higher sucralose yield because the better flexibility can provide larger free void spaces with facilitation of emulsion shrinking, resulting in higher crystallization ratio and rate. Also, the ASC conditions have been optimized, based on which low aspect ratio (1.5585) and small particle size (15.755 mu m) can be obtained using ONA as an anti-solvent. Based on single-crystal structure analysis, the ONA-treated product bearing relatively weaker O-H & ctdot;O/C-H & ctdot;Cl hydrogen bonds was adopted for further ultrasound-assisted ASC process. Interestingly, upon the intermittent sonication mode, the sucralose product with ultra-low aspect ratio (1.244) and larger crystal size (42.722 mu m) can be obtained, which is attributed to the relatively stronger sp3-C-H & ctdot;Cl0 hydrogen bonds on the {011} face than O-H & ctdot;O bonds on the {101}/{110} faces. This work will provide a theoretical guide for the production of high-quality sucralose.
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| GB/T 7714 | Zhou, Dongyu , Li, Yongshang , Jie, Huimin et al. Intermittent ultrasound-assisted anti-solvent crystallization for sucralose production with ultra-low aspect ratio and larger crystal size [J]. | CRYSTENGCOMM , 2025 , 27 (21) : 3492-3501 . |
| MLA | Zhou, Dongyu et al. "Intermittent ultrasound-assisted anti-solvent crystallization for sucralose production with ultra-low aspect ratio and larger crystal size" . | CRYSTENGCOMM 27 . 21 (2025) : 3492-3501 . |
| APA | Zhou, Dongyu , Li, Yongshang , Jie, Huimin , Lei, Jiayan , Chen, Zi'ang , Chen, Xiaoping et al. Intermittent ultrasound-assisted anti-solvent crystallization for sucralose production with ultra-low aspect ratio and larger crystal size . | CRYSTENGCOMM , 2025 , 27 (21) , 3492-3501 . |
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A multi-level memristor, implemented with inexpensive precursors and well-defined mechanisms, will be significant for the development of high-density memory in the coming big data era. Sulfur, a cheap element extracted from petroleum and natural gas, holds fascinating potential for use in information memory. In this work, a three-component hybrid, [Cu(Phen)2I]2Cu2I4S8 (Phen = 1,10-phenanthroline), was synthesized. In this structure, strong pi-pi stacking interactions among Phen ligands, cuprophilic interactions in (Cu2I4)2- anions, and C-H & ctdot;I/S hydrogen bonds contributed to the formation of a quasi-3D network. A FTO/hybrid/Ag memristor was fabricated, exhibiting ternary memory performance with a high ON2/ON1/OFF current ratio (104.50/101.47/1) and a ternary yield of 68%. The memristor could operate at a high temperature of 185 degrees C. Based on the structural characteristics of the hybrid, FIB-SEM measurements on the Ag/hybrid/Ag model device, double logarithm analysis of the I-V curve, memory performance of the three individual precursors, and external voltage-dependent PXRD, its ternary resistive switching performance could be explained as follows: upon continuous external voltages, the transition OFF -> ON1 was driven by enhanced pi-pi stacking interactions among the Phen ligands, and the current jump ON1 -> ON2 resulted from the formation of a conductive S8/(Cu2I4)2- layer bearing cuprophilic interactions via S8 relaxation. This works extends the strategy of sulfur relaxation in multi-level memories from coordinated polysulfides to uncoordinated ones. The use of inexpensive precursors, combined with the distinct structure-property correlation, provides a promising avenue for implementing novel high-density memristors.
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| GB/T 7714 | Li, Huifang , Gao, Yiqun , Lin, Xi et al. Ternary resistive switching memory of copper-organic complex/iodocuprate/sulfur hybrid enabled by π-π interactions and S8 relaxation [J]. | CRYSTENGCOMM , 2025 , 27 (10) : 1439-1445 . |
| MLA | Li, Huifang et al. "Ternary resistive switching memory of copper-organic complex/iodocuprate/sulfur hybrid enabled by π-π interactions and S8 relaxation" . | CRYSTENGCOMM 27 . 10 (2025) : 1439-1445 . |
| APA | Li, Huifang , Gao, Yiqun , Lin, Xi , Li, Ke , Lin, Xiaoli , Li, Haohong et al. Ternary resistive switching memory of copper-organic complex/iodocuprate/sulfur hybrid enabled by π-π interactions and S8 relaxation . | CRYSTENGCOMM , 2025 , 27 (10) , 1439-1445 . |
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(D)-Glucaric acid is a value-added dicarboxylic acid that can be utilized in the chemical, food, and pharmaceutical industries. Due to the complex process and environmental pollution associated with the chemical production of d-glucaric acid, bioconversion for its synthesis has garnered increasing attention in recent years. In this study, a novel cell factory was developed for the efficient production of d-glucaric acid using d-xylose and methanol. Mdh, Hps, Phi, Miox, Ino1, Suhb, and Udh were first co-expressed in E. coli JM109 to construct the d-glucaric acid synthesis pathway. The deletion of FrmRAB, RpiA, PfkA, and PfkB was then performed to block or weaken the endogenous competitive pathways. Next, adaptive evolution was carried out to improve cell growth and substrate utilization. With the purpose of further increasing the product titer, the NusA tag and myo-inositol biosensor were introduced into engineered E. coli to enhance Miox expression. After medium optimization and fermentation process control, 3.0 g/L of d-glucaric acid was finally obtained in the fed-batch fermentation using modified Terrific Broth medium.
Keyword ：
d-glucaric acid d-glucaric acid Escherichia coli Escherichia coli metabolic engineering metabolic engineering microbial fermentation microbial fermentation
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| GB/T 7714 | Chen, Wei-Xiang , Zheng, Ling-Jie , Luo, Xuan et al. Metabolic Engineering and Adaptive Evolution of Escherichia coli for Enhanced Conversion of D-Xylose to D-Glucaric Acid Mediated by Methanol [J]. | BIOTECHNOLOGY AND BIOENGINEERING , 2025 , 122 (6) : 1472-1483 . |
| MLA | Chen, Wei-Xiang et al. "Metabolic Engineering and Adaptive Evolution of Escherichia coli for Enhanced Conversion of D-Xylose to D-Glucaric Acid Mediated by Methanol" . | BIOTECHNOLOGY AND BIOENGINEERING 122 . 6 (2025) : 1472-1483 . |
| APA | Chen, Wei-Xiang , Zheng, Ling-Jie , Luo, Xuan , Zheng, Shang-He , Zheng, Hui-Dong , Fan, Li-Hai et al. Metabolic Engineering and Adaptive Evolution of Escherichia coli for Enhanced Conversion of D-Xylose to D-Glucaric Acid Mediated by Methanol . | BIOTECHNOLOGY AND BIOENGINEERING , 2025 , 122 (6) , 1472-1483 . |
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D-Allulose, a rare sugar characterized by its high sweetness and low-calorie profile, is gaining attention in the sweetener market. This study introduces an innovative method for converting sucrose into D-allulose through microbial fermentation. An irreversible synthesis pathway was constructed by expressing the scrA, scrB, alsE, and a6PP genes in Escherichia coli JM109 (DE3), enhancing substrate utilization via dual PTS-dependent transport of sucrose and D-fructose. A fructose-1,6-bisphosphatase mutant (GlpX [K29A]) was used to facilitate the influx of fructose-1-phosphate into the synthesis pathway. The Embden-Meyerhof-Parnas (EMP) and pentose phosphate (PP) pathways were weakened by deleting the pfkA and rpiA genes. To further regulate carbon fluxes, a structurally stable antisense RNA (asRNA) was employed to inhibit FbaA expression. The fermentation medium was optimized using response surface methodology. Finally, the D-allulose titer reached 12.8 g/L, with a yield of 0.23 g/g on sucrose, achieved through fed-batch fermentation in a 5 L fermenter.
Keyword ：
D-allulose D-allulose Escherichia coli Escherichia coli fermentation fermentation metabolic engineering metabolic engineering sucrose utilization sucrose utilization
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| GB/T 7714 | Zheng, Ling-Jie , Xu, Jun-Jie , Huang, Shi-Hong et al. Improvement of D-Allulose Synthesis from Sucrose through Dual PTS-Dependent Transport in Engineered Escherichia coli [J]. | JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY , 2025 , 73 (30) : 18889-18898 . |
| MLA | Zheng, Ling-Jie et al. "Improvement of D-Allulose Synthesis from Sucrose through Dual PTS-Dependent Transport in Engineered Escherichia coli" . | JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 73 . 30 (2025) : 18889-18898 . |
| APA | Zheng, Ling-Jie , Xu, Jun-Jie , Huang, Shi-Hong , Wen, Xin-Yuan , Shi, Ling , Zeng, Guang-Jin et al. Improvement of D-Allulose Synthesis from Sucrose through Dual PTS-Dependent Transport in Engineered Escherichia coli . | JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY , 2025 , 73 (30) , 18889-18898 . |
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Borneol synthesis faces challenges from co-generated impurities (isoborneol/camphor) and competing dehydration/dehydrogenation during isomerization. Here, Co/TiO2 is demonstrated as a selective catalyst for isoborneol-to-borneol isomerization, effectively suppressing structural degradation. Controlled acidity and cobalt dispersion are identified as critical factors: TiO2's moderate acidity promotes isomerization, while strongly acidic supports (e.g., Mordenite) favor dehydration to camphene. Reduced cobalt particle size enhances active-site accessibility, lowering activation energy and boosting borneol yield. A one-pot two-step process achieves >62 % borneol content with © 2025 Elsevier Ltd
Keyword ：
Acidity Acidity Activation energy Activation energy Camphor Camphor Catalysts Catalysts Cobalt Cobalt Dehydration Dehydration Dispersions Dispersions Isomerization Isomerization Isomers Isomers Particle size Particle size
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| GB/T 7714 | Xiao, Yuansen , Li, Huimin , Wang, Zheng et al. Synthesis of borneol via isomerization of isoborneol catalyzed by Co/TiO2 [J]. | Materials Today Chemistry , 2025 , 48 . |
| MLA | Xiao, Yuansen et al. "Synthesis of borneol via isomerization of isoborneol catalyzed by Co/TiO2" . | Materials Today Chemistry 48 (2025) . |
| APA | Xiao, Yuansen , Li, Huimin , Wang, Zheng , Liu, Zhihan , Li, Chenyang , Wu, Bin et al. Synthesis of borneol via isomerization of isoborneol catalyzed by Co/TiO2 . | Materials Today Chemistry , 2025 , 48 . |
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