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Highly effective direct synthesis of DMC from CH_3OH and CO_2 using novel Cu-Ni/C bimetallic composite catalysts

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Chinese Chemical Letters 2009年第3期20卷 352-355页

作者： Jun Bian Min Xiao Shuan Jin Wang yi xin lu Yue Zhong Meng State Key Laboratory of Optoelectronic Materials and Technologies~Institute of Optoelectronic and Functional Composite Materials Sun Yat-Sen University Guangzhou 510275 PR China Department of Chemistry & Medicinal Chemistry Program Office of Life Sciences National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore

Novel Cu-Ni/C has been prepared and utilized as an efficient catalyst system in direct synthesis of DMC from CH3OH and CO2.

关键词： Dimethyl carbonate Carbon dioxide Bimetallic catalyst Catalysis

Acid-induced topological morphology modulation of graphitic carbon nitride homojunctions as advanced metal-free catalysts for OER and pollutant degradation

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Journal of Materials Science & Technology 2021年第27期86卷 210-218页

作者： Hua-Wei Zhang yi-xin lu Bo Li Gui-Fang Huang Fan Zeng Yuan-Yuan Li Anlian Pan yi-Feng Chai Wei-Qing Huang Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education&Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices School of Physics and ElectronicsHunan UniversityChangsha410082China College of Materials Science and Engineering Hunan UniversityChangshaHunan410082China School of Physics and Electronics Science Hunan University of Science and TechnologyXiangtan411201China

Topological morphology that dominates the surface electronic properties of nanostructures plays a key role in producing desired materials for versatile functions and applications in many fields,but its modulation for specific functions remains a big ***,we report an acid-induced method to prepare S-doped graphitic carbon nitride/graphitic carbon nitride(S-CN/CN)homojunction by simply pyrolyzing a supramolecular precursor synthesized from melamine and H_(2)SO_(4).The topological morphology and electronic structure of CN homojunction can be easily adjusted only by changing the ratio of raw ***,the topological morphology of S-CN/CN homojunction can be further adjusted from hollow cocoon to 2D nanosheets by changing the annealing *** optimized S-CN/CN homojunction shows highly efficient in charge transfer and separation and exhibits superior OER activity and high ability to degrade organic ***,S-CN/CN nanosheets only demand low overpotential of301 m V to drive a current density of 10 m Acm^(-2)in 1 M KOH media,and the corresponding Tafel slope is only 57.71 m V/dec,which is superior to the most advanced precious metal Ir O_(2)***,under visible light irradiation,its photodegradation kinetic rate of Rh B is 2.38,which is 47.6 times higher than that of bulk *** work provides useful guidance for designing and developing efficient multifunctional metal-free catalysts.

关键词： Topological morphology Acid-induced Molecular self-assembly S-CN/CN homojunction OER

Effects of Mo promoters on the Cu-Fe bimetal catalysts for the DMC formation from CO_2 and methanol

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Chinese Chemical Letters 2013年第4期24卷 307-310页

作者： ying-Jie Zhou Min Xiao Shuan-Jin Wang Dong-Mei Han yi-xin lu Yue-Zhong Meng The Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province/State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen University Department of Chemistry & Medicinal Chemistry Program Office of Life SciencesNational University of Singapore

The Mo-promoted Cu-Fe bimetal catalysts were prepared and used for the formation of dimethyl carbonate （DMC） from CO2 and methanol. The catalysts were characterized by X-ray diffraction （XRD）, temperature programmed reduction （TPR）, laser Raman spectra （LRS）, energy dispersive spectroscopy （EDS） and temperature programmed desorption （TPD） techniques. The experimental results demonstrated that the Mo promoters can decrease the reducibility and increase the dispersion of Cu-Fe clusters, The concentration balance of base-acid sites can be readily adjusted by changing the Mo content. The moderate concentration balance of acid and base sites was in favor of the DMC formation, Under optimal experimental conditions, the highest methanol conversion of 6,99% with a DMC selectivity of 87.7% can be obtained when 2.5 wt% of Mo was loaded.

关键词： Dimethyl carbonateCarbon dioxideCatalysisBimetal catalyst

Expression profiles and function of Toll-like receptors in human corneal epithelia

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Chinese Medical Journal 2007年第10期120卷 893-897页

作者： WU xin-yi GAO Jian-lu REN Mei-yu Department of Ophthalmology Qilu Hospital Shandong University Jinan 250012 China

Background Toll-like receptors play an important role in the human immune system. This study was conducted to investigate the expression profiles and function of Toll-like receptor （TLR）1-9 in human corneal epithelium. Methods The expression of TLR1-9 mRNA in 20 human donor corneal epithelia samples abraded during photorefractive keratotomy （PRK） and cultivated telomerase-immortalized human corneal epithelial cells （THCEs） was examined by semi-quantitative reverse-transcriptase polymerase chain reaction （RT-PCR） analysis. Human peripheral blood mononuclear cells （PBMCs） were used as positive controls. The expression of the TLR2 and TLR4 proteins was detected by Western analysis. ELISA was used to detect IL-8 secretion from THCEs challenged with ligands for TLR3 and TLR4 with and without antibody blockade. Results The expression of TLR1-9 at the mRNA level was detected in the epithelia of 20 patients and in THCE. Significant differences among individuals were observed. One patient was found to lack of the expression of TLR3, 4, 6 and 8, whereas another did not express TLRS. The expression of TLR2 and TLR4 protein was detected in human corneal epithelial cells. As THCE cells express TLR1-9, cells were challenged with lipopolysaccharides （LPS） and poly I：C to determine whether TLR4 and TLR3 were functional. The results showed that secretion of IL-8 by cells stimulated with LPS and Poly I：C was 7 to 10 fold greater than secretion by unchallenged cells. Blocking TLR4 with an anti-TLR4 antibody significantly inhibited the LPS-induced IL-8 production by THCE （P〈0.05）. Conclusion Human corneal epithelial cells express multiple TLRs and are able to recognize LPS and poly I：C. Different expression profiles among individuals suggest that differences in the susceptibilities and sensitivities to bacterial and viral infection in human populations relate to different patterns of TLR expression.

关键词： Toll-like receptors corneal epithelium, human gene expression ligand

Finesse measurement for high-power optical enhancement cavity

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Chinese Physics B 2024年第1期33卷 414-421页

作者：陆心怡柳兴田其立王焕汪嘉俊颜立新 Department of Engineering Physics Tsinghua UniversityBeijing 100084China Key Laboratory of Particle&Radiation Imaging Ministry of EducationBeijing 100084China

Finesse is a critical parameter for describing the characteristics of an optical enhancement cavity(OEC). This paper first presents a review of finesse measurement techniques, including a comparative analysis of the advantages, disadvantages, and potential limitations of several main methods from both theoretical and practical perspectives. A variant of the existing method called the free spectral range(FSR) modulation method is proposed and compared with three other finesse measurement methods, i.e., the fast-switching cavity ring-down(CRD) method, the rapidly swept-frequency(SF) CRD method, and the ringing effect method. A high-power OEC platform with a high finesse of approximately 16000 is built and measured with the four methods. The performance of these methods is compared, and the results show that the FSR modulation method and the fast-switching CRD method are more suitable and accurate than the other two methods for high-finesse OEC measurements. The CRD method and the ringing effect method can be implemented in open loop using simple equipment and are easy to perform. Additionally, recommendations for selecting finesse measurement methods under different conditions are proposed, which benefit the development of OEC and its applications.

关键词： optical enhancement cavity finesse measurement cavity ring-down ringing effect

BOVINE BESNOITIOSIS,AN APPROACH TO UNDERSTAND IT IMPORTANCE IN HEI LONGJIANG

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BOVINE BESNOITIOSIS,AN APPROACH TO UNDERSTAND IT IMPORTANCE ...

Multifaceted roles of lymphatic and blood endothelial cells in the tumor microenvironment of hepatocellular carcinoma:A comprehensive review

中国畜牧兽医学会兽医寄生虫学分会第十三次学术研讨会

作者： Chang Liu yi-xin lu Wei Li Ming xin Song Cortes Helder College of Veterinary Medicine Northeast Agricultural University of China Victor Caeiro Laboratory of Parasitology.ICAAM MitraUniversity of Evora

Bovine besnoitiosis is a disease caused by Besnoitia besnoiti,a cyst forming coccidian parasite belonging to the subfamily *** has a wide geographical distribution and,in Europe,where it has been recently recognized by EFSA as an emergent disease,it is leading to important economical *** definitive host of this parasite in still unknown and no treatment is available for the *** infections are mild or subclinical,characterized by the formation of numerous cutaneous and sub-cutaneous cysts,lowering the quality of skins for leather ***,when the parasite reaches an uninfected herd,10%of animals are expected to become diseased and will die or will have to be slaughtered without any commercial *** the acute stage of the disease,females if pregnant will abort and,males will become *** definitive host of this parasite in still unknown and no treatment is available for the *** the present,the management of bovine besnoitiosis is based on the control of vectors and the identification of infected animals for *** the present work we review the epidemiological and clinical figures of the disease and the present ongoing research work being established at the College of Veterinary Medicine,Northeast Agricultural University of China.

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World Journal of Hepatology 2024年第4期16卷 537-549页

作者： Jing-Jing Li Jia-Xi Mao Han-Xiang Zhong Yuan-Yu Zhao Fei Teng xin-yi lu Li-Ye Zhu Yang Gao Hong Fu Wen-Yuan Guo Department of Liver Surgery and Organ Transplantation Shanghai Changzheng HospitalNaval Medical UniversityShanghai 200003China

The tumor microenvironment is a complex network of cells,extracellular matrix,and signaling molecules that plays a critical role in tumor progression and *** and blood vessels are major routes for solid tumor metastasis and essential parts of tumor drainage ***,recent studies have shown that lymphatic endothelial cells(LECs)and blood endothelial cells(BECs)also play multifaceted roles in the tumor microenvironment beyond their structural functions,particularly in hepatocellular carcinoma(HCC).This comprehensive review summarizes the diverse roles played by LECs and BECs in HCC,including their involvement in angiogenesis,immune modulation,lymphangiogenesis,and *** providing a detailed account of the complex interplay between LECs,BECs,and tumor cells,this review aims to shed light on future research directions regarding the immune regulatory function of LECs and potential therapeutic targets for HCC.

关键词： Lymphatic endothelial cells Blood endothelial cells Hepatocellular carcinoma Tumor microenvironment

Continuous-wave optical enhancement cavity with 30-kW average power

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Chinese Physics B 2023年第3期32卷 258-261页

作者：柳兴陆心怡王焕颜立新李任恺黄文会唐传祥 Ronic Chiche Fabian Zomer Department of Engineering Physics Tsinghua UniversityBeijing 100084China UniversitéParis-Saclay CNRS/IN3 P3IJCLab91405 OrsayFrance

Optical enhancement cavity(OEC)is a powerful tool for fundamental research and *** this paper,the progress of a continuous-wave OEC to realize of megawatt cavity for a novel light source based on a steady-state microbunching(SSMB)mechanism,is *** efficiently suppressing all external noise and optimizing the alignment,mode-matching,and polarization matching,stable and long-term locking is achieved with the help of two feedback *** modal instability phenomenon caused by the surface thermoelastic deformation is observed.A pair of D-shape mirrors are utilized to remove the high-order ***,an intra-cavity average power of 30 kW is reached.

关键词： optical enhancement cavity continuous-wave laser modal instability high power cavity

Identifying the dynamic behaviors in complete reconstruction of Co-based complex precatalysts during electrocatalytic oxygen evolution

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Journal of Energy Chemistry 2025年第1期100卷 226-233页

作者： Jingfang Zhang Danyang Wu Linke Cai Youluan lu Fanpeng Cheng Lijuan Shi Qun yi Yao Liu yi Huang Key Laboratory of Green Chemical Engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Hubei Key Laboratory of Novel Reactor and Green Chemical Technology School of Chemical Engineering & Pharmacy Wuhan Institute of Technology Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction of Ministry of Education College of Chemistry Central China Normal University College of Materials Science and Engineering Fuzhou University

Transition metal-based nanomaterials have emerged as promising electrocatalysts for oxygen evolution reaction（OER）. Considerable research efforts have shown that self-reconstruction occurs on these nanomaterials under operating conditions of OER process. However, most of them undergo incomplete reconstruction with limited thickness of reconstruction layer, leading to low component utilization and arduous exploration of real catalytic mechanism. Herein, we identify the dynamic behaviors in complete reconstruction of Co-based complexes during OER. The hollow phytic acid（PA） cross-linked CoFe-based complex nanoboxes with porous nanowalls are designed because of their good electrolyte penetration and mass transport ability, in favor of the fast and complete reconstruction. A series of experiment characterizations demonstrate that the reconstruction process includes the fast substitution of PA by OH-to form Co（Fe）(OH)xand subsequent potential-driven oxidation to Co（Fe）OOH. The obtained CoFeOOH delivers a low overpotential of 290 mV at a current density of 10 mA cm-2and a long-term *** experiment results together with theory calculations reveal that the Fe incorporation can result in the electron rearrangement of reconstructed CoFeOOH and optimization of their electronic structure,accounting for the enhanced OER activity. The work provides new insights into complete reconstruction of metal-based complexes during OER and offers guidelines for rational design of high-performance electrocatalysts.

关键词： Complete reconstruction Co-based complex Precatalysts Oxygen evolution reaction