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Optimization of electrocatalytic properties of NiMoCo foam electrode for water electrolysis by post-treatment processing

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Rare Metals 2015年第11期34卷 802-807页

作者： Jian-Wei Wang Yue-Fa Wang Jing-Guo Zhang Yan-Lin Yu ge-ge zhou Lei Cheng Lin-Shan Wang Z.Zak Fang State Key Laboratory of Nonferrous Metals and Processes General Research Institute for Nonferrous Metals GRIPM Advanced Materials Co. Ltd General Research Institute for Nonferrous Metals Department of Metallurgical Engineering University of UtahSalt Lake City

Hydrogen is a potential alternative to fossil fuels in coping with the increased global energy demand,and water electrolysis is an attractive approach for H2production. Nickel–molybdenum–cobalt（Ni Mo Co） foam electrodes used for water electrolysis were prepared by the electrodeposition method, and the influence of heat treatments on the surface structure of Ni Mo Co foam electrodes,mechanical properties, and electrochemical performance of the synthesized electrodes was investigated in order to optimize the post-treatment processes. The residual carbon in the surface of the electrode was removed by decarbonization in the atmospheric condition. The carbon content decreases to lower than 200 ×10-6when the temperature exceeds 500 °C. Next, the material is reduced in hydrogen atmosphere from 500 to 1100 °C to remove the surface oxides. As the temperature increases, the surface molybdenum content increases significantly between 500 and 800 °C, the surface grains become coarser, and the tensile strength and elongation increase as well. The lowest polarization overpotential is obtained at 800 °C. Below 800 °C, the electrode is only partially reduced and some black oxide zones are observed on the electrode surface,which leads to the higher polarization overpotential. Thesamples heat-treated at the temperatures of higher than 800 °C show better strength and toughness as well as brighter appearance. However, the surface particle coarsening leads to a decrease in the specific surface area and a higher overpotential.

关键词： Water electrolysis Foam electrode Ni Mo Co Post-tr

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氧化铟的铋掺杂改性及其光催化性能

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安全与环境学报 2016年第6期16卷 224-228页

作者：赵平歌张格红周孝德汪文博西安理工大学水利水电学院西安710048 西安工业大学建筑工程学院西安710021

为了研究氧化铟及不同Bi^(3+)掺杂量的氧化铟改性材料的光催化性能,采用溶剂热法制备了氧化铟和掺杂不同比例Bi^(3+)的氧化铟光催化剂,并通过X射线衍射(XRD)、扫描电子显微镜(SEM)、X射线电子能谱(EDS)、比表面积(BET)分析等方法对其结... 详细信息

为了研究氧化铟及不同Bi^(3+)掺杂量的氧化铟改性材料的光催化性能,采用溶剂热法制备了氧化铟和掺杂不同比例Bi^(3+)的氧化铟光催化剂,并通过X射线衍射(XRD)、扫描电子显微镜(SEM)、X射线电子能谱(EDS)、比表面积(BET)分析等方法对其结构及性质进行了表征。结果表明,当Bi^(3+)掺杂量小于或等于10%(摩尔分数)时,Bi^(3+)的掺杂对氧化铟纳米球的晶型结构和结晶度基本不产生影响;而当掺杂量大于10%时,晶体结构发生变化;Bi^(3+)的掺杂进一步增大了氧化铟纳米球的比表面积和孔容,掺杂后氧化铟纳米球的N2吸附-脱附等温线为典型的IUPAC(国际纯粹与应用化学联合会)IV型等温线。以紫外灯(波长λ=254 nm)为光源,以直接大红为目标降解物,考察了不同Bi^(3+)掺杂量的氧化铟的光催化性能。结果表明:Bi^(3+)掺杂量为8%时,氧化铟对直接大红废水去除效果最佳,去除率高达94.3%,光催化剂活性最高;光催化降解直接大红的过程完全符合一级反应动力学方程;同时,活性物种捕获试验证明了加入10 m L异丙醇,反应中光降解率只有很小的下降,表明羟基自由基(·OH)不是光催化体系中的主要活性物种,而空穴(h+)才是光催化氧化直接大红过程中的主要活性物种。研究表明,通过元素掺杂可以很好地改变氧化物的光催化性能。

关键词：环境工程学掺杂氧化铟直接大红活性物种

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circT P63-N suppresses the proliferation and metastasis of nasopharyngeal carcinoma via engaging with HSP90AB1 to modulate the YAP1/Hippo signaling pathway

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Science China Life Sciences 2025年

作者： Dan Wang Sicheng Zuo Junshang ge Hongke Qu Jie Wu Na Yi Lei Shi Yumin Wang Yongzhen Mo Chunmei Fan Yi He Pan Chen Ming zhou Bo Xiang Wei Xiong Wenjia Guo Zhaoyang Zeng Can Guo NHC Key Laboratory of Carcinogenesis and Hunan Key Laboratory of Cancer Metabolism Hunan Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine Central South University Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education Cancer Research Institute and School of Basic Medicine Sciences Central South University Furong Laboratory Cancer Research Institute Affiliated Cancer Hospital of Xinjiang Medical University Xinjiang Key Laboratory of Translational Biomedical Engineering

Circular RNAs(circRNAs) play pivotal roles in the development and progression of various diseases, including malignant tumors. However,the biological functions and the underlying mechanisms of many circRNAs remain elusive. In this study, we identified a novel circRNA,circTP63-N, generated through the splicing of exons 2–4 of the TP63 gene in nasopharyngeal carcinoma(NPC). circTP63-N was found to be downregulated in clinical samples of NPC. Both in vitro and in vivo experiments unequivocally demonstrated that circTP63-N inhibits the proliferation and metastasis of NPC cells. Further investigations revealed that circTP63-N interacted with the HSP90AB1 protein, leading to the recruitment of LATS/YAP1 proteins. This, in turn, induced phosphorylation and ubiquitination-dependent degradation of YAP1, resulting in reduced nuclear translocation of YAP1 and inhibition of the transcriptional activation of downstream oncogenic genes, including INHBA, MMP3, and CCNE2. Our findings highlight the identification of circTP63-N, a novel circRNA encoded by an important tumor-relevant gene TP63 and elucidate its molecular mechanism as a tumor suppressor in NPC. These insights offer novel potential molecular markers and therapeutic targets for the clinical diagnosis and treatment of NPC.

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Fabrication of metal/metal functionally graded materials with a high melting point difference

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Journal of University of Science and Technology Beijing 2005年第5期12卷 427-430页

作者： Zhangjian zhou Changchun ge Laboratory of Special Ceramics ＆ Powder Metallurgy Materials Science and Engineering School University of Science and Technology Beijing Beijing100083 China

Three kinds of full compositional distribution （from 0 to 100wt%W） W/Cu FGMs （functionally graded materials） with high density is fabricated by resistance sintering under ultra-high pressure. Microstructure analysis showed that the good grading composition of all FGMs has been obtained. The sintering mechanism of W is mainly solid state sintering. Thermal shock test in air demonstrated that the grading at the interface between W and Cu is effective for the reduction of thermal stress, but obvious transver- se and vertical cracks occur in the pure W layer. The oxidation of the W60Cu40 layer and the W40Cu60 layer is heavier than that of the other layers.

关键词： FGM resistance sintering ultra-high pressure high melting difference W Cu

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Adversarial network embedding using structural similarity

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Frontiers of Computer Science 2021年第1期15卷 223-232页

作者： Zihan zhou Yu GU ge YU School of Computer Science and Engineering Northeastern UniversityShenyang 110819China

Network embedding which aims to embed a given network into a low-dimensional vector space has been proved effective in various network analysis and mining tasks such as node classification,link prediction and network *** emerging network embedding methods have shifted of emphasis in utilizing mature deep learning *** neural-network based network embedding has become a mainstream solution because of its high eficiency and capability of preserv-ing the nonlinear characteristics of the *** this paper,we propose Adversarial Network Embedding using Structural Similarity(ANESS),a novel,versatile,low-complexity GAN-based network embedding model which utilizes the inherent vertex-to-vertex structural similarity attribute of the *** learns robustness and ffective vertex embeddings via a adversarial training ***,our method aims to exploit the strengths of generative adversarial networks in generating high-quality samples and utilize the structural similarity identity of vertexes to learn the latent representations of a ***,ANESS can dynamically update the strategy of generating samples during each training *** extensive experiments have been conducted on the several benchmark network datasets,and empirical results demon-strate that ANESS significantly outperforms other state-of-theart network embedding methods.

关键词： network embedding structural similarity generative adversarial network

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A privacy preserving two-factor authentication protocol for the Bitcoin SPV nodes

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Science China(Information Sciences) 2020年第3期63卷 34-48页

作者： Lu zhou Chunpeng ge Chunhua SU Division of Computer Science University of Aizu College of Computer Science and Technology Nanjing University of Aeronautics and Astronautics

In the Bitcoin network, the simplified payment verification protocol(SPV) enables a lightweight device such as a mobile phone to participate in the bitcoin network without needed to download and store the whole Bitcoin blocks. A Bitcoin SPV node initiates and verifies transactions of the Bitcoin network through the Bitcoin wallet software which is deployed on a resource constrained device such as a mobile phone. Thus, the security of the wallet is critical for the SPV nodes as it may affect the security of user’s cryptocurrencies. However, there are some concerns about the security flaws within the SPV nodes which could lead to significant economic losses. Most of these vulnerabilities can be resolved by employing a secure user authentication protocol. Over the years, researchers have engaged in designing a secure authentication protocol. However, most proposals have security flaws or performance issues. Recently, Park et al. proposed a two-party authenticated key exchange protocol for the mobile environment. They claimed that their protocol is not only secure against various attacks but also can be deployed efficiently. However, after a thorough security analysis, we find that the Park et al.’s protocol is vulnerable to user forgery attack, smart card stolen attack and unable to provide user anonymity. To enhance security, we proposed an efficient and secure user authentication protocol for the SPV nodes in the mobile environment which can fulfill all the security requirements and has provable security. Additionally, we provide performance analysis which shows our proposed protocol is efficient for the SPV nodes in the Bitcoin network.

关键词： SPV nodes secure authentication two-factor Bitcoin

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The holomorphic d-scalar curvature on almost Hermitian manifolds

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Science China Mathematics 2023年第10期66卷 2293-2308页

作者： Jianquan ge Yi zhou School of Mathematical Sciences Laboratory of Mathematics and Complex SystemsBeijing Normal UniversityBeijing 100875China

In this paper,we study the existence of conformal metrics with the constant holomorphic d-scalar curvature and the prescribed holomorphic d-scalar curvature problem on closed,connected almost Hermitian manifolds of di... 详细信息

关键词： holomorphic d-scalar curvature almost Hermitian manifold Yamabe problem prescribed curvature problem

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Microstructure and Wear/corrosion Resistance of Stainless Steel Laser-alloyed with Mn+W_(2)C, Mn+NiWC and Mn+SiC

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 283-294页

作者： zhou Rui DIAO Xiaogang SUN Yixin School of Metallurgical Engineering Jiangsu University of Science and TechnologyZhangjiagang 215600China CITIC Heavy Cast Iron Industry Co. Ltd.Luoyang 417039China

In-situ formed high Mn steel coating reinforced by carbides was formed by laser surface alloying(LSA).Laser alloyed layers on 1Cr18Ni9Ti steel with Mn+W_(2)C(specimen A),Mn+NiWC(specimen B)and Mn+SiC(specimen C)powders were fabricated to improve the wear and corrosion behavior of 1Cr18Ni9Ti steel blades in high speed *** evolution,phases,element distribution,microhardness,wear and corrosion behavior of the laser alloyed layers were *** indicated that high Mn steel matrix composites with undissolved W_(2)C,WC and other in-situ formed carbides were formed by LSA with Mn+W_(2)C and Mn+NiWC while SiC totally dissolved into the high Mn matrix when adding Mn+*** as the binding phase in Ni-WC powder decreased the crack sensitivity of the alloyed layer as compared with the addition of W_(2)C *** improvement in average microhardness was achieved in the matrix in specimen A,B and C,with the value of 615,602 and 277 HV_(0.5),while that of the substrate was 212 HV_(0.5).The increase of microhardness,wear and corrosion resistance is highly corelated to microstructure,formed phases,type and content of carbides,micro-hardness and toughness of the alloyed layers.

关键词： laser surface alloying stainless steel carbide type microstructure wear and corrosion resistance

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Marine bacterial surfactin CS30-2 induced necrosis-like cell death in Huh7.5 liver cancer cells

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Journal of Oceanology and Limnology 2020年第3期38卷 826-833页

作者： zhou Shengnan LIU ge WU Shimei College of Life Sciences Qingdao UniversityQingdao 266071China Key Laboratory of Experimental Marine Biology Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Biology and Biotechnology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China

Marine bacterial strain Bacillus ***30 exhibited high anticancer activity against Huh7.5 human liver *** purified the corresponding anticancer agent by sequential acidic precipitation,methanol extraction,Sephadex LH-20 chromatography,and reversed phase high-performance liquid chromatography(RP-HPLC),then analyzed it in mass *** on the results of purification and mass spectrometry,we deduced that the anticancer agent was the same component as our previously purified antifungal agent surfactin ***,to the best of our knowledge,this is the first report on the surfactin possessing both antifungal and anticancer *** CS30-2 was demonstrated to exhibit high anticancer activity in a dose-dependent manner against Huh7.5 liver cancer *** investigation showed that surfactin CS30-2 induced the increased generation of reactive oxygen species(ROS)and severe disruption of cell membrane,thus leading to cell ***,unlike previously reported surfactins,surfactin CS30-2 caused cancer cell death via necrosis instead of apoptosis.

关键词： Bacillus surfactin anticancer activity reactive oxygen species(ROS)

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Activity regulation and applications of metal-organic framework-based nanozymes

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Rare Metals 2024年第3期43卷 900-914页

作者： ge Fang Shou-Xin Bao gen-Xiu zhou Cui-Cui ge State Key Laboratory of Radiation Medicine and Protection School of Radiation Medicine and ProtectionSchool for Radiological and Interdisciplinary Sciences(RAD-X)Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySuzhou 215123China Suzhou Nanomicro Technology Co. LtdSuzhou 215000China

As a new generation of artificial enzymes,nanozymes show outstanding advantages such as high stability,low cost,and facile synthesis,which endow them with promising applications in biomedical and environmental *** the various reported nanozymes,metal-organic frameworks(MOFs)could mimic the active center of natural enzymes and provide a hydrophobic environment,which makes MOFs attractive alternatives to natural *** to the highly structural diversity and tailorability of MOFs,rational design will contribute to improve the activity of MOF-based nanozymes and promote their potential applications in both biomedical and environmental ***,a comprehensiye suminary of activity regulatory strategies of MOF-based nanozymes is urgently ***,we summarized the activity regulatory strategies of MOFs with intrinsic enzyme-like activities via modulation of metal nodes,ligands,structures and *** the applications of MOF-based nanozymes in biosensing,hazardous degradation,antibacterial,and cancer therapy were also ***,the current challenges and future perspectives were discussed in *** is highly expected that this review will provide a better understanding on the rational design of novel high-performance MOF-based nanozymes.

关键词： Metal-organic frameworks(MOF)-based nanozymes Activity regulation Biosensing Cancer therapy Hazardous degradation Antibacterial

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