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Progress of crystalline carbon nitride in synthesis,atomic structure characterization and photocatalysis

Nano Research 2025年第1期18卷 455-476页

作者： Yueyang Tan Zhongyan Zhang Yayun Pu Zongzhao Sun Limin Huang School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China School of Traffic and Environment Shenzhen Institute of Information TechnologyShenzhen 518172China College of Chemistry and Chemical Engineering Linyi UniversityLinyi 276000China School of Optoelectronic Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065China

Crystalline carbon nitride(CCN)has emerged as a highly promising semiconductor photocatalyst with unique properties,such as enhanced charge migration rate,reduced carrier recombination probability,narrow band gap and improved light-harvesting efficiency,which are suitable for a wide range of applications in solar-to-chemical conversion,energy storage,therapeutic and environmental pollution *** the past few years,there has been an increasing number of reviews on CCN ***,most of these reviews mainly focus on synthesis methods,modification and applications,with less emphasis on the relationship between structures and properties,as well as on indepth exploration of the crystalline *** electronic instability of CCN presents challenges for conventional characterization techniques to directly and thoroughly investigate the relationship between its intrinsic atom structure and photocatalytic *** mini-review not only highlights the progress in CCN-based photocatalysts,with a focus on molten-salt synthesis(including solid-salt-induced crystallization),but also emphasizes the atomic structure characterization by specifically introducing the differential phase contrast(DPC)scanning transmission electron microscopy(STEM)technique,which is essential for enhancing our understanding of the crystal structure and photocatalytic mechanisms of ***,the review outlines the photocatalytic performance and puts forward potential challenges on CCN *** review will provide a clearer understanding of the relationship in developing precise customization strategies for CCN materials and ultimately explain the regularity and specificity of the enhanced performance in targeted photocatalytic systems.

关键词： crystalline carbon nitride synthesis characterization photocatalysis

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Recent Progress Using High-throughput Sequencing Technologies in Plant Molecular Breeding

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Journal of Integrative Plant Biology 2012年第4期54卷 215-227页

作者： Qiang Gao Guidong Yue Wenqi Li Junyi Wang Jiaohui Xu Ye Yin Beijing Genomics institute-shenzhen Shenzhen 518083China

High-throughput sequencing is a revolutionary technological in- novation in DNA sequencing. This technology has an ultra-low cost per base of sequencing and an overwhelmingly high data output. High-throughput sequencing has brought novel research methods and solutions to the research fields of genomics and post-genomics. Furthermore, this technology is leading to a new molecular breeding revolution that has landmark significance for scientific research and enables us to launch multi-level, multi- faceted, and multi-extent studies in the fields of crop genetics, genomics, and crop breeding. In this paper, we review progress in the application of high-throughput sequencing technologies to plant molecular breeding studies.

关键词： High-throughput sequencing genomics molecular breeding.

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Molecular mechanism of effect of rotating constant magnetic field on organisms

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Science China(Life Sciences) 2001年第5期44卷 554-560页

作者：张小云罗振国何晓阳韩庆国张维德 Life Science institute Shenzhen University Shenzhen China

The effect of RCMF-magnetic therapy apparatus on signal substances was studied. The radioimmunoassay (RIA) suggested that the magnetic field increased p-endorphin markedly in plasma. ELISA indicated that the magnetic field inhibited vomiting reaction induced by chemotherapy drug, with reversible decrease of serotonin (5-HT) level in brains, small intestine tissue and serum. Furthermore, the bioeffect of magnetic fields on 5-HT level presented a typical window effect and post-effect, and the inhibitory effect of magnetic field on the emesis was parallel to the decrease level of 5-HT. This result implied that the decrease of 5-HT might be the basis of rotating constant magnetic field (RCMF) inhibiting drug-induced emesis. The nitric acid reductase-spec-trophotometry and nicotinamide adenine dinucleotide-diaphorase/arginine-vasopressin (AVP) cytochemistry technique showed that the magnetic field induced nitric oxide (NO) increase in hypo-thalamus and the high NO(A) level lasted for 3 hours. The results suggested that NO(A) increases after the treatment of the magnetic field in hypothalamus, which may result from strong expression of NO-ergic neuron in paraventricular hypothalamic nucleus (PVN), periventricular hypothalamic nucleus (PEN) and supraoptic nucleus (SON). The coexistence of NO and AVP may play an important role in the regulation of endocrine and neuroendocrine by the magnetic field. And our data also confirmed that the magnetic field increased the content of NO so strongly that high NO level lasted for 3 hours, also made neuropeptide Y (NPY) cell in medulla stained heavily.

关键词： rotating constant magnetic field (RCMF) β-endorphin serotonin (5-HT) nitric oxide (NO) neuropeptide Y(NPY).

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CNS Organoid Surpasses Cell-Laden Microgel Assembly to Promote Spinal Cord Injury Repair

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Research 2022年第4期2022卷 677-692页

作者： Zitian Wang Haoran Zhao iaowei Tang Tianyu Meng Davit Khutsishvili Bing Xu Shaohua Ma Tsinghua shenzhen International Graduate School Tsinghua UniversityShenzhen 518055China Tsinghua-Berkeley shenzhen institute Shenzhen 518055China shenzhen Bay Laboratory ShenzhenChina institute for Brain and Cognitive Sciences Tsinghua UniversityBeijing 100084China

The choice of therapeutic agents remains an unsolved issue in the repair of spinal cord *** this work,various agents and configurations were investigated and compared for their performance in promoting nerve regeneration,including bead assembly and bulk gel of collagen and Matrigel,under acellular and cell-laden conditions,and cerebral organoid(CO)as the in vitro preorganized ***,in Matrigel-based agents and the CO transplantations,the recipient animal gained more axon regeneration and the higher Basso,Beattie,and Bresnahan(BBB)scoring than the grafted collagen ***,new nerves more uniformly infiltrated into the transplants in bead form assembly than the molded ***,the materials loaded the neural progenitor cells(NPCs)or the CO implantation groups received more regenerated nerve fibers than their acellular counterparts,suggesting the necessity to transplant exogenous cells for large trauma(e.g.,a 5 mm long spinal cord transect).In addition,the activated microglial cells might benefit from neural regeneration after receiving CO transplantation in the recipient *** organoid augmentation may suggest that in vitro maturation of a microtissue complex is necessary before transplantation and proposes organoids as the premium therapeutic agents for nerve regeneration.

关键词： neural gained implantation

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Janus heterostructure of cobalt and iron oxide as dual-functional electrocatalysts for overall water splitting

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Nano Research 2023年第2期16卷 2245-2251页

作者： Xiaojie Li Huike Zhang Xuan Li Qi Hu Chen Deng Xingxing Jiang Hengpan Yang Chuanxin He College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China institute of Microscale Optoelectronics Shenzhen UniversityShenzhen 518060China

In electrocatalytic water splitting,low-cost dual-functional catalysts can not only reduce costs but also avoid cross-contamination of cathode and ***,the orderly aggregation of active sites for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)into a specific catalyst is very *** this study,a Co/Fe_(3)O_(4)Janus heterojunction supported on carbon fiber paper(J-CoFe-CFP)is designed and successfully ***,Co-Fe oxides have preferable OER activity but weak HER ***,in J-CoFe-CFP,due to the intense and special electronic interaction of different substances(Co and Fe3O4)in the Janus heterogeneous interface,a huge number of tidy high-quality HER and OER active sites are uniformly distributed on the interface simultaneously,which endows the catalyst with both excellent HER and OER *** HER,the overpotential@10 mA·cm^(−2)(ηHER)is only 53.9 mV,and the Tafel slope is 43.7 mV·dec^(−1).In OER,theηis 272 mV,and the Tafel slope is 50.2 mV·dec^(−1),much lower than those of RuO_(2)/*** the J-CoFe-CFP||J-CoFe-CFP two-electrode system,the required voltage is only 1.26 V at the beginning and 1.56 V@10 mA·cm^(−2),much lower than those of RuO_(2)/CFP||20%Pt/C/*** work provides a Janus heterojunction pathway for bifunctional water electrolysis catalysts.

关键词： Janus bifunctional electrocatalytic water splitting CoFe

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CNTs/CNF-supported multi-active components as highly efficient bifunctional oxygen electrocatalysts and their applications in zincair batteries

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Nano Research 2023年第4期16卷 4793-4802页

作者： Weiyuan Ding Ali Saad Yuchen Wu Zhiwei Wang Xiuting Li institute for Advanced Study Shenzhen UniversityShenzhen 518060China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China

Rational construction of active components has been the biggest challenge in preparing efficient bifunctional oxygen ***,electrospinning and chemical vapor deposition(CVD)were employed to embed active species including FeCo nanoparticles,MNx(M=Fe,Co),and FePx in porous and graphitized carbon nanotubes(CNTs)/carbon nanofiber(CNF).The as-prepared FeCo@CoNx@FePx/C exhibited a half-wave potential as high as 0.86 V in oxygen reduction reaction(ORR)and low oxygen evolution reaction(OER)overpotential of 368 mV at 10 mA·cm^(−2),which are superior to Pt/C(0.83 V)and IrO_(2)(375 mV)*** assembled Zn-air battery(ZAB)showed a high energy efficiency(Edischarge/Echarge)of 65%at 20 mA·cm^(−2)and stabilized for 700 charge-discharge *** spectroscopic and microscopic characterizations evidenced that the outstanding bifunctionality of the electrocatalyst can be ascribed to three main reasons:First,FeCo nanoparticles are rich in MOH/MOOH active sites for OER,and FePx/CNTs constructed with CVD also modulate electronic structure to improve electron transfer;second,both MNx in carbon matrix and FePx/CNTs are highly active towards ORR;third,the CNTs/CNF are highly porous and graphitized,which promotes mass transport and improves electrical conductivity and stability of the *** work gives important implications on the design of bifunctional electrocatalysts.

关键词： carbon nanotubes(CNTs)/carbon nanofiber(CNF)-supported multi-active components oxygen reduction reaction oxygen evolution reaction zinc-air battery

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Multisensor long distance target detection using support vector machine

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Chinese Optics Letters 2007年第7期5卷 400-402页

作者：杨烜裴继红 College of Information Engineering shenzhen University Shenzhen 518060 Intelligent Information Processing institute of shenzhen University shenzhen 518060

Multisensor image fusion could improve system performances such as detection, tracking, and identification greatly. In this paper, a long distance target detection approach is presented based on multisensor image features fusion. This method extracts two different features from visual and infrared （IR） image sequences respectively to detect regions of motion information content. Temporal change feature is extracted from the visual image sequence using temporal decomposition based on wavelet, which reflects the dynamical content variation at a pixel at any time. And correlation features between local regions are extracted from IR image sequence to distinguish regions with potential moving targets. All these features are merged into a multi-dimensional space and the support vector machine is trained to select regions that have the potential target at each pixel location. The method is robust and feasible to detect long distance targets in clutter background scene.

关键词： Infrared imaging Support vector machines Target tracking

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Flashover Characteristics of Dry Band-water band on Hydrophobic Surfaces

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 392-400页

作者： Xiaohan Wu Fanghui Yin Bin Cao Daiming Yang Shichao Shao Liming Wang Tsinghua-Berkeley shenzhen institute(TBSI) Shenzhen 518055China shenzhen International Graduate School Tsinghua UniversityShenzhen 518055China shenzhen Polytechnic School Shenzhen 518055China

Due to their outstanding anti-flashover characteristics,composite insulators have been extensively applied in power systems.A lot of research has investigated flashover characteristics of hydrophobic specimens with artificial water ***,the phenomenon is not consistent with that of the contaminated composite *** the test specimens covered with water droplets,there is no obvious leakage current before the flashover and no obvious relationship between flashover voltage and the conductivity of water *** the contaminated composite insulator surface,there are short continuous arcs on the insulators before critical flashover,making insulators look like a luminous *** that under these two conditions,the proportion of water along the insulation distance is different,the flashover characteristic of“dry band-water band”on a hydrophobicity surface is analyzed in the present *** influence of the water band parameter(including length,width,and conductivity)as well as the length of dry band is *** this basis,the arc generation and development process of the surface covered with“dry band-water band”is *** research results improve the understanding of the flashover process on contaminated composite insulators.

关键词： Flashover characteristics hydrophobicity partial arc water band

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Peer-to-Peer Short-Term Sharing on the Rental Platform

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Journal of Systems Science and Systems Engineering 2022年第6期31卷 705-727页

作者： Ke Li Li Xiao Tsinghua-Berkeley shenzhen institute Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China

Peer-to-peer(P2P)rental markets connect independent owners and price sensitive *** of P2P rental platform include home sharing,such as Airbnb and Ma Yi Duan Zu,and carsharing,such as Uber and *** platform gains profit by asking owners and renters to pay the commission *** decide whether to share their durable goods,and if so,how much time to *** this paper,we study the short-term sharing behavior and decision making process in the P2P rental ***,we consider two settings:owner makes the rental price decision;and the platform makes the rental price *** former one applies to the home sharing industry,while the latter one applies to the carsharing *** addition,we consider two market conditions:supply shortage case(supply is less than demand);and supply surplus case(supply is larger than demand).We show that,platform earns a higher profit under supply surplus(or shortage)case if the potential owner ratio is high(or low).In addition,we show that,under supply shortage case,owner's optimal earnings and plaform's optimal profit do not change when we compare the setting where owner makes pricing decision with the setting where platform makes pricing ***,we numerically illustrate how the social welfare changes with respect to the owner's *** find that it is first decreasing,then increasing,and finally decreasing in owner's ratio.

关键词： P2P market price commission rate bilateral platform sharing economy

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Gallium-based liquid metal micro/nanoparticles for photothermal cancer therapy

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Journal of Materials Science & Technology 2023年第11期142卷 22-33页

作者： Mingming Fu Yifeng Shen Hao Zhou Xiaojia Liu Wenjun Chen Xing Ma School of Materials Science and Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China Sauvage Laboratory for Smart Materials School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China shenzhen Bay Laboratory Shenzhen 518055China

Gallium-based liquid metals have attracted significant interest in the biomedical field due to their unique properties such as low viscosity,good fluidity,high thermal/electrical conductivity,and good ***,photothermal therapy has made great development in the field of antitumor with its advantages of low adverse effects,high specificity,and repeatable *** photothermal capability possessed by gallium-based liquid metals makes them show unparalleled advantages in photothermal *** metal-based photothermal therapy has progressed in recent years and can perform a vital role in accurate and noninvasive antitumor ***,a review of the major preparation methods of liquid metal micro/nanoparticles,the mechanism of liquid metal photothermal conversion,and discussions on the factors affecting the photothermal properties of liquid metals are *** biological applications of liquid metal photothermal therapy in synergy with other therapies are discussed,as well as the current challenges and opportunities for the clinical translation of liquid metals in biomedical applications.

关键词： Gallium-based materials Photothermal conversion principle Photothermal therapy Synergistic therapy

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