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Multiple-Sized Amphiphilic Janus Gold Nanoparticles by Ligand Exchange at Toluene/Water Interface

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Journal of Materials Science & Technology 2016年第8期32卷 733-737页

作者： Kun luo Yongdong Xiang Haiming Wang Li Xiang zhihong luo Guangxi Key Laboratory of Universities for Clean Metallurgy Comprehensive Utilization of Nonferrous Metal Resource College of Materials Science and Engineering Guilin University of Technology

Amphiphilic Janus gold nanoparticles （GNPs） are prospected to encapsulate drug molecules in cancer therapy and to serve as heterogeneous catalysts at oil/water interfaces, where Janus GNPs with differ- ent sizes are required. In this work, multiple-sized precursor GNPs were synthesized by seeded growth method protected with tris（hydroxymethyl）phosphine oxide （THPO） ligand molecule, and a ligand ex- change reaction with triphenylphosphine （PPh3） at the toluene/water interface was employed to prepare amphiphilic Janus GNPs. UV-vis and transmission electron microscopy （TEM） analyses indicate that the as-prepared GNPs are nanocrystals with average diameters of 2.3 nm, 9.5 nm, 16.1 nm and 18.8 nm, re- spectively. Contact angle, Raman and X-ray photonic spectroscopy （XPS） analyses reveal that the self- assembled GNP films exhibit hydrophilic on one side and hydrophobic on another, owing to the adsorption of hydrophilic ligands （THPO and THP） and a similar amount of hydrophobic ligands （PPh3 and PPh30）. Angle-resolved XPS analysis further demonstrates that the individual GNPs actually possess hydro- philic and hydmphobic compartments on the surface, which regularly packed by supramolecular interactions at toluene/water interface to form the self-assembled GNP films.

关键词： Janus gold nanoparticles Amphipbilic Ligand exchange Self-assembly

Highly dispersed silver nanoparticles for performance-enhanced lithium oxygen batteries

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Journal of Materials Science & Technology 2021年第14期73卷 171-177页

作者： zhihong luo Fujie Li Chengliang Hu Liankun Yin Degui Li Chenhao Ji Xiangqun Zhuge Kui Zhang Kun luo School of Materials Science and Engineering Changzhou UniversityChangzhou 213164China College of Materials Science and Engineering Guilin University of TechnologyGuilin 541004China School of Engineering Newcastle UniversityNewcastle-upon-Tyne NE17RUUK

Aprotic lithium-oxygen batteries possess ultrahigh energy density but suffer from the sluggish decomposition of discharge product,quick depletion of Li anode and cleavage of electrolyte,in close association with oxygen reduction reaction at the ***,highly dispersed silver nanoparticles are used to enhance the lithium-oxygen battery with 1.0 M lithium perchlorate in dimethyl *** is observed that film-like amorphous lithium peroxide is formed through surface pathway instead of bulk crystals,due to the incorporation of silver nanoparticles dispersed in the electrolyte,which subsequently accelerates the decomposition of the discharge product by offering more active sites and improved *** released silver nanoparticles after battery charging can be re-used in the following *** and theoretical calculation further indicate that the suspended silver nanoparticles can adsorb the soluble oxygen reduction intermediates,which are responsible for the alleviation of oxidative cleavage of electrolyte and corrosion of lithium *** lifespan of lithium oxygen batteries is therefore significantly extended from 55 to 390 cycles,and the rate performance and full-discharge capacity are also largely *** battery failure is attributed to the coalescence and growth of silver nanoparticles in the electrolyte,and further improvement on colloid stability is underway.

关键词： Silver nanoparticle Lithium oxygen battery Performance Amorphous lithium peroxide Oxygen reduction intermediate

Nitrogen-doped graphite encapsulated Fe/Fe3C nanoparticles and carbon black for enhanced performance towards oxygen reduction

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Journal of Materials Science & Technology 2019年第11期35卷 2543-2551页

作者： Jie Zhu Zewei Xiong Jiming Zheng zhihong luo Guangbin Zhu Chao Xiao Zhengbing Meng Yibing Li Kun luo College of Materials Science and Engineering Guilin University of TechnologyGuilin 541004China School of Materials Science and Engineering Changzhou UniversityChangzhou 213164China

Non-noble metal(NNM)catalysts have recently attracted intensive interest for their high catalytic performance towards oxygen reduction reaction(ORR)at low ***,a novel NNM catalyst was synthesized by the simple pyrolysis of carbon black,urea and a Fe-containing precursor,which exhibits excellent ORR catalytic activity,superior durability and methanol tolerance versus the Pt/C catalyst in both alkaline and acidic *** electron microscopy(SEM),transmission electron microscopy(TEM)and X-ray diffraction(XRD)characterizations demonstrate that the product is a nitrogen-doped hybrid of graphite encapsulated Fe/Fe3C nanoparticles and carbon black.X-ray photoelectron spectrum(XPS)and electrochemical analyses indicate that the catalytic performance and chemical stability correlate closely with a nitrogen-rich layer on the Fe/Fe3C nanoparticle after pyrolysis with presence of urea,leading to the same four-electron pathway towards ORR as the Pt/C *** hybrid is prospective to be an efficient ORR electrocatalyst for direct methanol fuel cells with high catalytic performance at low cost.

关键词： Nitrogen doping Hybrid Fe/Fe3C Carbon black Oxygen reduction reaction

Feedback linearization and equivalent-disturbance compensation control strategy for piezoelectric stage

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Nanotechnology and Precision Engineering 2024年第2期7卷 49-59页

作者： Tao Huang Yingbin Wang zhihong luo Huajun Cao Guibao Tao Mingxiang Ling State Key Laboratory of Mechanical Transmissions for Advanced Equipment Chongqing UniversityChongqing 400044China College of Mechanical and Vehicle Engineering Chongqing UniversityChongqing 400044China Hongdu Aviation Industry Group NanchangJiangxi 330000China Robotics and Microsystems Center Soochow UniversitySuzhou 215123China

Piezoelectric stages use piezoelectric actuators and flexure hinges as driving and amplifying mechanisms,*** systems have high positioning accuracy and high-frequency responses,and they are widely used in various precision/ultra-precision positioning ***,the main challenge with these devices is the inherent hysteresis nonlinearity of piezoelectric actuators,which seriously affects the tracking accuracy of a piezoelectric *** by this challenge,in this work,we developed a Hammerstein model to describe the hysteresis nonlinearity of a piezoelectric *** particular,in our proposed scheme,a feedback-linearization algorithm is used to eliminate the static hysteresis *** addition,a composite controller based on equivalent-disturbance compensation was designed to counteract model uncertainties and external *** analysis of the stability of a closed-loop system based on this feedback-linearization algorithm and composite controller was performed,and this was followed by extensive comparative experiments using a piezoelectric stage developed in the *** experimental results confirmed that the feedback-linearization algorithm and the composite controller offer improved linearization and trajectory-tracking performance.

关键词： Piezoelectric stage Hysteresis nonlinearity Feedback linearization Equivalent-disturbance compensation

Decreased LDHB expression in breast tumor cells causes NK cell activation and promotes tumor progression

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Cancer Biology & Medicine 2024年第6期21卷 513-540页

作者： zhihong luo Xiaohua Huang Xinyi Xu Kefeng Wei Yi Zheng Ke Gong Wenhua Li Hubei Key Laboratory of Cell Homeostasis College of Life SciencesWuhan UniversityWuhan 430072China Wuhan University Shenzhen Research Institute Shenzhen 518057China Central Laboratory University of Chinese Academy of Sciences-Shenzhen HospitalShenzhen 518107China Hubei Province Key Laboratory of Allergy and Immunology and Department of Immunology School of Basic Medical SciencesWuhan UniversityWuhan 430071China

Objective: Abnormal metabolism is the underlying reason for breast cancer progression. Decreased lactate dehydrogenase B(LDHB) has been detected in breast cancer but the function of LDHB remains ***: Western blot was used to analyze LDHB expression in breast cancer cells. The impact of LDHB on tumor cell migration and invasion was determined using Transwell assays, wound healing assays, and a mouse lung metastasis model. Subcutaneous tumor formation, a natural killer(NK) cell cytotoxicity assay, and flow cytometry evaluated NK cell activation. Immunofluorescence and quantitative real-time PCR detected NK cell activation markers. Kaplan-Meier analysis evaluated the effect of immune cell infiltration on prognosis. Single-sample gene set enrichment analysis determined NK cell activation scores. A support vector machine predicted the role of LDHB in NK cell ***: In this study we showed that LDHB inhibits the breast cancer cell metastasis and orchestrates metabolic reprogramming within tumor cells. Our results revealed that LDHB-mediated lactic acid clearance in breast cancer cells triggers NK cell activation within the tumor microenvironment. Our findings, which were confirmed in a murine model, demonstrated that LDHB in tumor cells promotes NK cell activation and ultimately results in the eradication of malignant cells. Clinically, our study further validated that LDHB affects immune cell infiltration and function. Specifically, its expression has been linked to enhanced NK cell-mediated cytotoxicity and improved patient survival. Furthermore, we identified LDHB expression in tumors as an important predictor of NK cell activation, with strong predictive ability in some ***: Our results suggest that LDHB is a promising target for activating the tumor immune microenvironment in breast cancer, where LDHB-associated lactic acid clearance leads to increased NK cell activity. This study highlights the critical role of LDHB in regula

关键词： Breast cancer lactate dehydrogenase B lactic acid NK cells tumor immunity

Steering surface reconstruction of hybrid metal oxides for efficient oxygen evolution reaction in water splitting and zinc-air batteries

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Journal of Energy Chemistry 2024年第5期92卷 383-393页

作者： Jie Zhu Junxue Chen Xida Li Kun luo Zewei Xiong Zhiyu Zhou Wenyun Zhu zhihong luo Jingbin Huang Yibing Li Key Lab of New Processing Technology for Nonferrous Metals and Materials Ministry of EducationSchool of Materials Science and EngineeringGuilin University of TechnologyGuilin 541000GuangxiChina The Key Laboratory of Rare Earth Functional Materials and Applications Zhoukou Normal UniversityZhoukou 466001HenanChina School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing 100081China School of Materials Science and Engineering Changzhou UniversityChangzhou 213164JiangsuChina Wuhan Sunmoon Battery Co. LtdWuhan 430090HubeiChina

Surface reconstruction yields real active species in electrochemical oxygen evolution reaction(OER)conditions;however,rationally regulating reconstruction in a targeted manner for constructing highly active OER electrocatalysts remains a formidable ***,an electrochemical activation strategy with selective etching was utilized to guide the reconstruction process of a hybrid cobalt-molybdenum oxide(CoMoO_(4)/Co_(3)O_(4)@CC)in a favorable direction to improve the OER *** in-situ Raman and multiple ex-situ characterization tools demonstrate that controlled surface reconstruction can be easily achieved through Mo etching,with the formation of a dynamically stable amorphous-crystalline *** calculations together with experimental results reveal that the synergistic effects between amorphous CoOOH and crystalline Co_(3)O_(4) are crucial in enhancing the catalytic ***,the reconstructed CoMoO_(4)/Co_(3)O_(4)@CC exhibits a low overpotential of 250 mV to achieve a current density of 10 mA cm^(-2) in 1 M KOH,and more importantly it can be practiced in electrolytic water splitting and rechargeable zinc-air batteries devices,achieving ultra-long stability for over 500 and 1200 h,*** work provides a promising route for the construction of high-performance electrocatalysts.

关键词： Electrocatalyst Oxygen evolution reaction Surface reconstruction Selective etching Amorphous-crystalline heterostructures

Two-dimensional silica enhanced solid polymer electrolyte for lithium metal batteries

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Particuology 2024年第2期85卷 146-154页

作者： zhihong luo Weiyong Li Chong Guo Ya Song Mingxia Zhou Yan Shi Jing Xu Long Li Bin Shi Quansheng Ouyang Jiao-jing Shao Guangmin Zhou School of Materials and Metallurgy Guizhou UniversityGuiyang550025China State Key Laboratory of Advanced Chemical Power Sources Zunyi563003China Graphene Materials Engineering Research Center of Guizhou Colleges and Universities Guiyang550025China Tsinghua-Berkeley Shenzhen Institute&Tsinghua Shenzhen International Graduate Schoo Tsinghua UniversityShenzhen518055China

Solid polymer electrolytes(SPEs)are promising substitutes for current flammable liquid electrolytes to achieve high-safety and high-energy-density lithium metal *** oxide(PEO)based solid polymer electrolytes have attracted increasing attention because of their excellent flexibility,manufacturability,light weight,and low-cost processing,while they often suffer from low ionic con-ductivity at room temperature,low lithium transference number and unsatisfactory interfacial resis-tance,which largely restrain their practical ***,two-dimensional holey silica nanosheets(2D-HSN)as the fillers,together with LiNO_(3) as the electrolyte additive,are introduced in a PEO/poly(-vinylidene fiuoride-co-hexafluoropropylene)(PVDF-HFP)blended polymer matrix to obtain a *** incorporation of HSN filler creates supplementary channels for lithium ion migration and lowers the crystallinity of the polymer,thereby facilitating the movement of lithium *** HSN-based SPE demonstrates higher ionic conductivity up to 3.7 x 10-4 S cm-1 at 30℃,larger Li+transference number close to 0.34,and more stable lithium plating/stripping than that without the fillers,and HSN can promote the formation of more stable solid electrolyte interphase(SEI)*** as-assembled LiFePO4||Li batteries deliver a high specific capacity of 159 mA h g-1 with the capacity retention of 95.5%after 200 cycles at 30℃,as well as superior rate performance and cycling stability compared to that using the blank SPE.

关键词： Vermiculite nanosheets Two-dimensional silica Solid polymer electrolytes FillersLithium metal batteries

Enhance Cyclic Performance of Li-O2 Batteries by Adopting Ga-Sn Liquid Metal as Functionalized Cathode

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Enhance Cyclic Performance of Li-O2 Batteries by Adopting Ga...

基于信息-知识-智能转化律视角的信息和知识定义研究

中国化学会第二十次全国电化学大会

作者： Chenhao Ji Guangbin Zhu zhihong luo Kun luo College of Materials Science and Engineering Guilin University of Technology School of Materials Science and Engineering Changzhou University

Cathode passivation is one of the important issues influencing the performance of Li-O2 batteries. Promoting discharge products decomposition by tuning their morphology facilitates to ameliorate the above mentioned issue. In this paper, Ga-Sn liquid metal modified multi-walled carbon nanotube cathode（LM/MWNTs） improves the Li-O2 battery performance by altering the morphology of discharge products, which introduce the formation of leafgem-like Li2O2,

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来源： cnki会议评论

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情报杂志 2014年第6期33卷 28-31页

作者：田杰罗志宏重庆医科大学附属第一医院图书馆重庆400016

研究目的是为了使信息、知识、情报、智能基于统一视角下的定义而实现严格区分,为推动情报学回归其核心而奠定部分基础理论。首先综述国内外关于信息、知识等概念的定义后论述了其中存在的问题,然后以"信息-知识-智能"转化律为理论依据... 详细信息

研究目的是为了使信息、知识、情报、智能基于统一视角下的定义而实现严格区分,为推动情报学回归其核心而奠定部分基础理论。首先综述国内外关于信息、知识等概念的定义后论述了其中存在的问题,然后以"信息-知识-智能"转化律为理论依据,并结合哲学原理而分别界定了其各自的改进定义,最后剖析了新定义的意义。结论:信息、知识、情报、智能概念在统一视角下的定义得以严格区分,它促使形成了统一"数知-谋情-决行"的智能观模型,也为辨别其各自外延提供了基于"表述内容之属性"的判别标准。

关键词：信息概念知识概念情报概念智能概念 “信息-知识-智能”转化律数据资源