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Graphene-supported cobalt nanoparticles used to activate SiO_(2)-based anode for lithium-ion batteries

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Chinese Chemical Letters 2023年第3期34卷 447-453页

作者： Qi An xiaohong sun Ying Na Shu Cai Chunming Zheng School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China School of Chemistry and Chemical Engineering State Key Laboratory of Hollow-fiber Membrane Materials and Membrane ProcessesTiangong UniversityTianjin 300387China

Although SiO_(2)-based anode is a strong competitor to supersede graphite anode for lithium-ion batteries,it still has problems such as low electrochemical activity, enormous loss of active lithium, and serious volume expansion. In order to solve these problems, we used a graphene network loaded with cobalt metal nanoparticles(rGO-Co) to coat SiO_(2) porous hollow spheres(SiO_(2)@rGO-Co). The construction of porous hollow structure and graphene network can shorten the lithium-ion(Li^(+)) diffusion distance and enhance the conductivity of the composite, which improves the electrochemical activity of SiO_(2) effectively. They also alleviate the volume expansion of the anode in the cycling process. Moreover,nano-scale cobalt metal particles dispersed on graphene catalyze the conversion reaction of SiO_(2) and activate the locked Li+in Li_(2)O through a reversible reaction, which improves the charge and discharge capacity of the anode. The capacity of SiO_(2)@rGO-Co reaches 370.4 m Ah/g after 100 cycles at 0.1 A/g,which is 6.19 times the capacity of pure SiO_(2)(59.8 mAh/g) under the same circumstance. What is more,its structure also exhibits excellent cycle stability, with a volume expansion rate of only 13.0% after 100 cycles at a current density of 0.1 A/g.

关键词： Lithium-ion batteries SiO_(2)-based anode Graphene network Co nanoparticles Electrochemical activity

光子Moiré超晶格薄膜的设计及光学特性研究

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光学学报 2024年第4期44卷 355-362页

作者：赵富源孙晓红郑州大学电气与信息工程学院河南省激光与光电信息技术重点实验室河南郑州450001

二维光子Moiré超晶格拥有一些常规光子晶体不具备的特性,例如平带特征和不同于安德森局域化的光局域现象。本文利用多光束干涉法构建二维光子Moiré超晶格结构,采用有限元法对其能带结构及光场特性进行研究。通过优化Moiré晶格厚度、... 详细信息

二维光子Moiré超晶格拥有一些常规光子晶体不具备的特性,例如平带特征和不同于安德森局域化的光局域现象。本文利用多光束干涉法构建二维光子Moiré超晶格结构,采用有限元法对其能带结构及光场特性进行研究。通过优化Moiré晶格厚度、空气孔半径对其平带及局域特性的影响,得到了高局域特性的Moiré晶格结构。研究中发现,正方晶格具有不同于六角晶格的准狄拉克锥光局域化效应。本文研究结果对发展高性能微纳结构器件具有重要参考价值。

关键词：光子晶体光子Moiré超晶格多光束干涉平带光局域

Gentiopicroside targets PAQR3 to activate the PI3K/AKT signaling pathway and ameliorate disordered glucose and lipid metabolism

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Acta Pharmaceutica Sinica B 2022年第6期12卷 2887-2904页

作者： Haiming Xiao xiaohong sun Zeyuan Lin Yan Yang Meng Zhang Zhanchi Xu Peiqing Liu Zhongqiu Liu Heqing Huang Laboratory of Pharmacology&Toxicology School of Pharmaceutical SciencesSun Yat-sen UniversityGuangzhou 510006China School of Pharmaceutical Sciences Guangzhou University of Chinese MedicineGuangzhou 510006China National and Local United Engineering Lab of Druggability and New Drugs Evaluation School of Pharmaceutical SciencesSun Yat-sen UniversityGuangzhou 510006China

The obstruction of post-insulin receptor signaling is the main mechanism of insulin-resistant diabetes.Progestin and adipoQ receptor 3(PAQR3),a key regulator of inflammation and metabolism,can negatively regulate the PI3 K/AKT signaling pathway.Here,we report that gentiopicroside(GPS),the main bioactive secoiridoid glycoside of Gentiana manshurica Kitagawa,decreased lipid synthesis and increased glucose utilization in palmitic acid(PA) treated HepG2 cells.Additionally,GPS improved glycolipid metabolism in streptozotocin(STZ) treated high-fat diet(HFD)-induced diabetic mice.Our findings revealed that GPS promoted the activation of the PI3 K/AKT axis by facilitating DNA-binding protein 2(DDB2)-mediated PAQR3 ubiquitinated degradation.Moreover,results of surface plasmon resonance(SPR),microscale thermophoresis(MST) and thermal shift assay(TSA) indicated that GPS directly binds to PAQR3.Results of molecular docking and cellular thermal shift assay(CETSA) revealed that GPS directly bound to the amino acids of the PAQR3 NH2-terminus including Leu40,Asp42,Glu69,Tyr125 and Ser129,and spatially inhibited the interaction between PAQR3 and the PI3 K catalytic subunit(P110α) to restore the PI3 K/AKT signaling pathway.In summary,our study identified GPS,which inhibits PAQR3 expression and directly targets PAQR3 to restore insulin signaling pathway,as a potential drug candidate for the treatment of diabetes.

关键词： Gentiopicroside Insulin resistance PAQR3 PI3K/AKT DDB2 Ubiquitylation Glucose metabolism disorder Lipid metabolism disorder

miRNA-137-5p improves spatial memory and cognition in Alzheimer's mice by targeting ubiquitin-specific peptidase 30

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Animal Models and Experimental Medicine 2023年第6期6卷 526-536页

作者： Yang Jiang Wei Bian Jing Chen Xiaopan Cao ChunYao Dong Ying Xiao Bing Xu xiaohong sun Department of Neurology The First People's Hospital of ShenYangShenyangP.R.China Department of Neurology The Fourth Affiliated Hospital of China Medical UniversityShenyangP.R.China Department of Neurology and Neuroscience Shenyang Tenth People's HospitalShenyang Chest HospitalShenyangP.R.China Science Experiment Center China Medical UniversityShenyangChina

Background:Alzheimer’sdisease(AD)is a prevalent neurodegenerative disorder causing progressive dementia.Research suggests that microRNAs(miRNAs)could serve as biomarkers and therapeutic targets for AD.Reduced levels of miR-137 have been observed in the brains of AD patients,but its specific role and down stream mechanisms remain unclear.This study sought to examine the therapeutic potential of miR-137-5p agomir in alleviating cognitive dysfunction induced in AD models and explore its potential mechanisms.Methods:This study utilized bioinformatic analysis and a dual-l uciferase reporter assay to investigate the relationship between miR-137-5p and ubiquitin-specific peptidase 30(USP30).In vitro experiments were conducted using SH-SY5Y cells to assess the impact of miR-137-5p on Aβ1-42 neurotoxicity.In vivo experiments on AD mice evaluated the effects of miR-137-5p on cognition,Aβ1-42 deposition,Tau hyperphosphorylation,and neuronal apoptosis,as well as its influence on USP30 levels.Results:It was discovered that miR-137-5p mimics efficiently counteract Aβ1-42 neurotoxicity in SH-SY5Y cells,a protective effect that is negated by USP30 overexpression.In vivo experiments demonstrated that miR-137-5p enhances the cognition and mobility of AD mice,significantly reducing Aβ1-42 deposition,Tau hyperphosphorylation,and neuronal apoptosis within the hippocampus and cortex regions.Mechanistically,miR-137-5p significantly suppresses USP30 levels in mice,though USP30 overexpression partially buffers against miR-137-5p-i nduced AD symptom improvement.Conclusion:Our study proposes that miR-137-5p,by instigating the downregulation of USP30,has the potential to act as a novel and promising therapeutic target for AD.

关键词： Alzheimer's disease Aβ1-42 miR-137-5p USP30

Novel fast lithium-ion conductor LiTa_(2)PO_(8)enhances the performance of poly(ethylene oxide)-based polymer electrolytes in all-solid-state lithium metal batteries

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Chinese Chemical Letters 2022年第8期33卷 4037-4042页

作者： Ying Na Zhe Chen Zhongkai Xu Qi An Xi Zhang xiaohong sun Shu Cai Chunming Zheng School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China School of Chemistry and Chemical Engineering State Key Laboratory of Hollow-fiber Membrane Materials and Membrane ProcessesTiangong UniversityTianjin 300387China

At present,replacing the liquid electrolyte in a lithium metal battery with a solid electrolyte is considered to be one of the most powerful strategies to avoid potential safety hazards.Composite solid electrolytes(CPEs)have excellent ionic conductivity and flexibility owing to the combination of functional inorganic materials and polymer solid electrolytes(SPEs).Nevertheless,the ionic conductivity of CPEs is still lower than those of commercial liquid electrolytes,so the development of high-performance CPEs has important practical significance.Herein,a novel fast lithium-ion conductor material LiTa_(2)PO_(8) was first filled into poly(ethylene oxide)(PEO)-based SPE,and the optimal ionic conductivity was achieved by filling different concentrations(the ionic conductivity is 4.61×10^(-4)S/cm with a filling content of 15 wt%at 60℃).The enhancement in ionic conductivity is due to the improvement of PEO chain movement and the promotion of LiTFSI dissociation by LiTa_(2)PO_(8).In addition,LiTa_(2)PO_(8) also takes the key in enhancing the mechanical strength and thermal stability of CPEs.The assembled LiFePO_(4) solid-state lithium metal battery displays better rate performance(the specific capacities are as high as 157.3,152,142.6,105 and 53.1 mAh/g under0.1,0.2,0.5,1 and 2 C at 60℃,respectively)and higher cycle performance(the capacity retention rate is86.5%after 200 cycles at 0.5 C and 60℃).This research demonstrates the feasibility of LiTa_(2)PO_(8) as a filler to improve the performance of CPEs,which may provide a fresh platform for developing more advanced solid-state electrolytes.

关键词： Composite solid electrolyte All-solid-state lithium metal battery LiTa_(2)PO_(8) Poly(ethylene oxide) Lewis acid

Long cycle performance of NC@VN/MnO cathode for AZIBs based on Mn/V relay type collaboration

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能源化学:英文版 2023年第8期83卷 106-118,I0005页

作者： Tingting Li Ruisong Guo Yang Li Leichao Meng xiaohong sun Fuyun Li Xinqi Zhao Zhongkai Xu Jianhong Peng Lingyun An Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin 300072China College of Petrochemical Technology Lanzhou University of TechnologyLanzhou 730050GansuChina Qinghai Provincial Key Laboratory of Nanomaterials and Technology School of Physics and Electronic Information EngineeringQinghai Minzu UniversityXining 810007QinghaiChina

Aqueous zinc ion batteries(AZIBs) have received great attention because of their non-toxicity,high safety,low cost,high abundance,and high specific power.However,their specific capacity is still low compared with lithium ion battery,and current academic research interesting has been focused on developing new cathode materials with high specific capacity.In this study,a Mn/V hybrid polymer framework is designed by a simple self-polymerization scheme.During subsequent calcination,ultrafine VN quantum dots and MnO nanoparticles are generated in situ and stably encapsulated inside N-doped carbon(NC) shells to obtain a novel hybrid cathode NC@VN/MnO for AZIBs.According to the density functional theory(DFT) calculation,the hybrids of MnO and VN can generate both interfacial effects and built-in electric fields that significantly accelerate ion and electron transport by tuning the intrinsic electronic structure,thus enhancing electrochemical performance.A synergistic strategy of composition and structural design allows the rechargeable AZIBs to achieve low-cost and excellent long-cycle performance based on a relay type collaboration at different cycling stages.Consequently,the NC@VN/MnO cathode has output a capacity of 108.3 mA h g^(-1)after 12,000 cycles at 10 A g^(-1).These results clearly and fully demonstrate the advantages of the hybrid cathode NC@VN/MnO.

关键词： VN quantum dots Mno N-doped carbon Heterojunction Long-cycle performance

Simultaneous realization of high sulfur utilization and lithium dendrite-free via dual-effect kinetic regulation strategy toward lithium-sulfur batteries

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Journal of Energy Chemistry 2023年第6期81卷 260-271,I0007页

作者： Xinqi Zhao xiaohong sun Ruisong Guo Song Wang Fuyun Li Tingting Li Wen Zhang Chunming Zheng Lingyun An Leichao Meng Xudong Hu Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin 300072China Qinghai Provincial Key Laboratory of Nanomaterials and Technology School of Physics and Electronic Information EngineeringQinghai Minzu UniversityXining 810007QinghaiChina Department of Chemistry&Biochemistry University of CaliforniaSanta BarbaraCA 93106United States

With the high theoretical specific capacity and energy density,lithium-sulfur batteries(LSBs)have been intensively studied as promising candidates for energy storage devices.However,LSBs are largely hindered by inferior sulfur utilization and uncontrollable dendritic growth.Herein,a hierarchical functionalization strategy of stepwise catalytic-adsorption-conversion for sulfur species via the synergetic of the efficiently catalytic host cathode and light multifunctional interlayer has been proposed to concurrently address the issues arising on the dual sides of the LSBs.The multi-layer SnS_(2) micro-flowers embedded into the natural three-dimensional(3D)interconnected carbonized bacterial cellulose(CBC)nanofibers are fabricated as the sulfur host that provides numerous catalytic sites for the rapid catalytic conversion of sulfur species.Moreover,the distinctive CBC-based SnO_(2)-SnS_(2) heterostructure network accompanied high conductive carbon nanofibers as the multifunctional interlayer promotes the rapid anchoringdiffusion-conversion of lithium polysulfides,Li^(+)flux redistribution,and uniform Li deposition.LSBs equipped with our strategy exhibit a high reversible capacity of 1361.5 m A h g^(-1)at 0.2 C and superior cycling stability with an ultra-low capacity fading of 0.031%per cycle in 1000 cycles at 1.5 C and 0.046%at 3 C.A favorable specific capacity of 859.5 m A h g^(-1)at 0.3 C is achieved with a high sulfur mass loading of 5.2 mg cm^(-2),highlighting the potential of practical application.The rational design in this work can provide a feasible solution for high-performance LSBs and promote the development of advanced energy storage devices.

关键词： Lithium-sulfur battery Catalytic sulfur host Multifunctional interlayer Polysulfides adsorbing-conversion Dendrite-free

Review on electrochemical carbon dioxide capture and transformation with bipolar membranes

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中国化学快报:英文版 2023年第8期34卷 114-129页

作者： Jinyun Xu Guoqiang Zhong Minjing Li Di Zhao Yu sun Xudong Hu Jiefang sun Xiaoyun Li Wenju Zhu Ming Li Ziqi Zhang Yu Zhang Liping Zhao Chunming Zheng xiaohong sun School of Chemical Engineering Tianjin Key Laboratory of Green Chemical Technology and Process EngineeringState Key Laboratory of Separation Membrane and Membrane ProcessesTiangong UniversityTianjin 300387China School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining TechnologyMinistry of EducationTianjin UniversityTianjin 300072China Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food poisoning Beijing Center for Disease Prevention and ControlBeijing 100013China Advanced Materials Research Laboratory CNOOC Tianjin Chemical Research and Design InstituteTianjin 300131China

Anthropogenic carbon dioxide(CO_(2))emission from the combustion of fossil fuels aggravates the global greenhouse effect.The implementation of CO_(2)capture and transformation technologies have recently received great attention for providing a pathway in dealing with global climate change.Among these technologies,electrochemical CO_(2)capture technology has attracted wide attention because of its environmental friendliness and flexible operating processes.Bipolar membranes(BPMs)are considered as one of the key components in electrochemical devices,especially for electrochemical CO_(2)reduction and electrodialysis devices.BPMs create an alkaline environment for CO_(2)capture and a stable pH environment for electrocatalysis on a single electrode.The key to CO_(2)capture in these devices is to understand the water dissociation mechanism occurring in BPMs,which could be used for optimizing the operating conditions for CO_(2)capture and transformation.In this paper,the references and technologies of electrochemical CO_(2)capture based on BPMs are reviewed in detail,thus the challenges and opportunities are also discussed for the development of more efficient,sustainable and practical CO_(2)capture and transformation based on BPMs.

关键词： Bipolar membranes Carbon dioxide Electrochemical capture Transformation CO_(2)reduction Electrodialysis devices Water dissociation

The preservation effects of chitosan copolymers(gallic acid and protocatechuic acid)on sea bass(Lateolabrax japonicus)fillets

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Aquaculture and Fisheries 2023年第3期8卷 305-315页

作者： Jiali Liu Weiqing Lan Yi Wu xiaohong sun Jun Mei Yiheng Chen Jing Xie College of Food Science and Technology Shanghai Ocean UniversityShanghai201306China Shanghai Aquatic Products Processing and Storage Engineering Technology Research Center Shanghai201306China National Experimental Teaching Demonstration Center for Food Science and Engineering(Shanghai Ocean University) Shanghai201306China Laboratory of Quality&Safety Risk Assessment for Aquatic Products on Storage and Preservation(Shanghai) Ministry of AgricultureShanghai201306China

This study was aimed at preparing chitosan(CS)-phenolic acids copolymers to obtain better preservation effect in marine products.In this work,CS was grafted onto phenolic acids such as gallic acid(GA)and protocatechuic acid(PA)by a carbodiimide coupling method.The copolymers(CS-grafted-GA(CS-g-GA)and CS-grafted-PA(CS-g-PA))were further confirmed through physicochemical properties including ultraviolet-visible(UV-Vis)spectrophotography,fourier transform infrared(FTIR)spectrometry,differential scanning calorimetry(DSC)thermogram,rheological behaviour,scanning electron microscope(SEM)and antioxidant activity analysis.Subsequently,the effects of copolymers on preservation of refrigerated sea bass(Lateolabrax japonicus)fillets were investigated.The results showed that the CS-g-GA(110.82 mg GA/g)exhibited higher grafting rate than CS-g-PA(62.63 mg PA/g).According to the assessment of UV-Vis and FTIR spectrometry,both the GA and PA were grafted onto CS successfully.SEM analysis demonstrated that the microstructure of copolymers became irregular.Meanwhile,both the CS-g-GA and CS-g-PA copolymers displayed superior thermal stability,rheological properties and antioxidant capacity than the pure CS.Furthermore,the copolymers also revealed a significantly stronger preservation effect on sea bass fillets including inhibiting microbial growth and delaying the deterioration of color,texture and sensory quality.Therefore,CS-g-GA and CS-g-PA could be used as promising preservatives for seafood.

关键词： Sea bass fillets Chitosan Grafted Coating Carbodiimide coupling Antioxidant capacity