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Influence of Calcareous Deposit on Corrosion Behavior of Q235 Carbon Steel with Sulfate-Reducing Bacteria

Journal of Ocean University of China 2017年第6期16卷 1213-1219页

作者： ZHANG Jie li Xiaolong WANG Jiangwei XU Weichen DUAN jizhou CHEN Shougang HOU Baorong Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 P. R. China University of Chinese Academy of Sciences Beijing 10049 P. R. China Institute of Material Science and Engineering Ocean University of China Qingdao 266100 P. R. China

Cathodic protection is a very effective method to protect metals, which can form calcareous deposits on metal surface. Research on the interrelationship between fouling organism and calcareous deposits is very important but very limited, especially sulfate-reducing bacteria(SRB). SRB is a kind of very important fouling organism that causes microbial corrosion of metals. A study of the influence of calcareous deposit on corrosion behavior of Q235 carbon steel in SRB-containing culture medium was carried out using electrochemical impedance spectroscopy(EIS), scanning electron microscopy(SEM) and surface spectroscopy(EDS). The calcareous deposit was formed with good crystallinity and smooth surface under the gradient current density of -30 μA cm^(-2) in natural seawater for 72 h. Our results can help elucidate the formation of calcareous deposits and reveal the interrelationship between SRB and calcareous deposits under cathodic protection. The results indicate that the corrosion tendency of carbon steel was obviously affected by Sulfate-reducing Bacteria(SRB) metabolic activity and the calcareous deposit formed on the surface of carbon steel under cathodic protection was favourable to reduce the corrosion rate. Calcareous deposits can promote bacterial adhesion before biofilm formation. The results revealed the interaction between biofouling and calcareous deposits, and the anti-corrosion ability was enhanced by a kind of inorganic and organic composite membranes formed by biofilm and calcareous deposits.

关键词： microbiological corrosion sulfate-reducing bacteria calcareous deposit cathodic protection

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Sulfur-doped g-C_(3)N_(4)/g-C_(3)N_(4) isotype step-scheme heterojunction for photocatalytic H_(2) evolution

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Journal of Materials Science & Technology 2022年第23期118卷 15-24页

作者： jizhou Jiang Zhiguo Xiong Haitao Wang Guodong liao Saishuai Bai Jing Zou Pingxiu Wu Peng Zhang Xin li School of Environmental Ecology and Biological Engineering School of Chemistry and Environmental EngineeringKey Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationWuhan Institute of TechnologyWuhan 430205China Key Laboratory of Rare Mineral Ministry of Natural ResourcesGeological Experimental Testing Center of Hubei ProvinceWuhan 430034China Semiconductor Electronic Special Gas of Hubei Engineering Research Center Jingzhou 434000China Institute of Biomass Engineering Key Laboratory of Energy Plants Resource and UtilizationMinistry of Agriculture and Rural AffairsSouth China Agricultural UniversityGuangzhou 510642China State Centre for International Cooperation on Designer Low-Carbon&Environmental Materials(CDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China

The rational fabrication of an efficient heterojunction is critical to the enhancement of photocatalytic hydrogen(H_(2)) evolution ***,a new-fashioned graphitic-carbon nitride(g-C_(3) N_(4)) based isotype step-scheme(S-scheme) heterojunction composed of sulfur-doped and sulfur-free active sites is developed by liquid sulfur-mediation of exfoliated g-C_(3) N_(4).Particularly,the liquid sulfur not only contributes to the full contact between sulfur species and exfoliated g-C_(3) N_(4),but also creates sulfur-doping and abundant pores,since self-gas foaming effect of sulfur ***,the S-doped and S-free active sites located in the structural unit of C_(3) N_(4) jointly construct a typical sulfur-doped g-C_(3) N_(4)/g-C_(3) N_(4) isotype step-scheme heterojunction,which endows highly efficient photocatalytic reaction ***,the optimal sample possesses remarkable photocatalytic H_(2) evolution activity(5548.1 μmol g^(-1) h^(-1)) and robust *** importantly,the investigation will open up a new path for the exploration of other carbon-based isotype S-scheme heterojunctions.

关键词： liquid sulfur S-doping g-C_(3)N_(4) Isotype S-scheme heterojunction Photocatalytic H_(2) evolution

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Chloride-binding capacity of mortars composed of marine sand subjected to external chloride penetration

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Journal of Oceanology and limnology 2022年第4期40卷 1462-1471页

作者： Congtao SUN Ming SUN Tao TAO Feng QU Gongxun WANG Peng ZHANG Yantao li jizhou DUAN Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao 266071China School of Civil Engineering Qingdao University of TechnologyQingdao 266033China School of Civil Engineering Hunan University of Science and TechnologyXiangtan 411201China Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Nantong Research and Development Center of Marine Science and Technology Institute of OceanologyChinese Academy of SciencesNantong 226004China

In order to explore the interactional relations of internal chloride and external chloride-binding amongst the cementitious materials,the chloride-binding capacity of mortars composed of marine sand(MS)or washed marine sand(WMS)were *** indicate that more external chloride can penetrate and diff use more deeply into the WMS mortar than that in the MS *** phenomenon suggests that the external chloride migration resistance due to WMS is lower than that caused by *** distribution trends of the bound chloride content in the two types of mortars are the same at diff erent immersion ***,a signifi cantly decreased area of the bound chloride content exists at the border of the external penetration area(EPA)and the external unaff ected area(EUA)at the immersion ages of 3 and 7 d,and then it disappears gradually with immersion *** WMS mortar can bind more external chloride,whereas the MS mortar can bind more internal chloride,at diff erent immersion *** distributions of bound chloride conversion rate in the EPAs of the two types of mortars diff er across immersion *** distribution fi rstly decreases,and then it increases at the immersion ages of 3 and 7 *** distribution was from increase,then decreases,and increase again at the immersion ages of 28 and 56 *** bound chloride conversion rate in the WMS mortar is aff ected more greatly by external chloride penetration than that in the MS *** amounts of the Friedel’s salt tend to increase with prolonged immersion ***,the penetration of external chloride can increase the amount of fi ne capillary pores smaller than 100 nm in the WMSmortar exposed for 56 d in the chloride salt solution(WMS-E)specimen.

关键词： marine sand mortar chloride binding Friedel’s salt pore structure

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Effect of external magnetic field on the shift of resonant frequency in photoassociation of ultracold Cs atoms

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Chinese Physics B 2019年第1期28卷 367-371页

作者： Pengwei li Yuqing li Guosheng Feng jizhou Wu Jie Ma liantuan Xiao Suotang Jia State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyCollege of Physics and Electronics Engineering Shanxi University Collaborative Innovation Center of Extreme Optics Shanxi University

We study the influence of external magnetic field on the shift of the resonant frequency in the photoassociation of ultracold Cs atoms, which are captured in a magnetically levitated optical crossed dipole trap. With the increase of the photoassociation laser intensity, the linear variation of the frequency shift is measured by recording the photoassociation spectra of the long-range 0_u^+ state of Cs molecule below the 6S_(1/2)+ 6P_(1/2) dissociation limit at different magnetic *** slope of the frequency shift to the intensity of the photoassociation laser exhibits a strong dependence on the external magnetic field. The experimental data is simulated with an analytic theory model, in which a single channel rectangular potential with the tunable well depth is introduced to acquire the influence of the magnetic field on the atomic behavior in the effective range where photoassociation occurs.

关键词： ultracold molecule photoassociation frequency shift

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Resistive Switching Properties and Failure Behaviors of(Pt, Cu)/Amorphous ZrO_(2)/Pt Sandwich Structures

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Journal of Materials Science & Technology 2016年第7期32卷 676-680页

作者： Haifa Zhai jizhou Kong Jien Yang Jing Xu Qingran Xu Hongchen Sun Aidong li Di Wu Henan Province Key Laboratory of Photovoltaic Materials College of Physics and Electronic Engineering Henan Normal University National Laboratory of Solid State Microstructures Department of Materials Science and Engineering College of Engineering and Applied SciencesNanjing University State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and Astronautics

The effect of Pt and Cu electrodes on the resistive switching properties and failure behaviors of amor- phous ZrO2 films were investigated. Compared with Cu/ZrO2/Pt structures, the Pt/ZrO2/Pt structures exhibit better resistive switching properties such as the higher resistance ratio of OFF/ON states, the longer switch- ing cycles and narrow distribution of OFF state resistance （Roff）. The switching mechanism in the Pt/ZrO2/ Pt structure can be attributed to the formation and rupture of oxygen vacancy filaments; while in the Cu/ZrO2/Pt structure, there exist both oxygen vacancy filaments and Cu filaments. The formation of Cu filaments is related to the redox reaction of Cu electrode under the applied voltage. The inhomoge- neous dispersive injection of Cu ions results in the dispersive Ro~ and significant decrease of operate voltage, Schematic diagrams of the formation of conductive filaments and the failure mechanism in the Cu/ZrO2/ Pt structures are also proposed.

关键词： ZrO2 Thin films Sol-gel method Failure

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Vibration analysis of fluid-conveying nanotubes embedded in an elastic medium considering surface effects

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Theoretical & Applied Mechanics Letters 2012年第3期2卷 41-44页

作者： Yuhang li Bo Fang Jiazhong Zhang jizhou Song School of Astronautics Harbin Institute of Technology Harbin 150001 China Department of Mechanical and Aerospace Engineering University of Miami Coral Gables FL 33146 USA

An analytical model is developed to study the surface effects on the vibration behavior including the natural frequency and the critical flow velocity of fluid-conveying nanotubes embedded in an elastic *** effects of surface elasticity and residual surface stress are accounted through the surface elasticity model and the Young-Laplace equation.A Winkler-type foundation is employed to model the interaction of nanotubes and the surrounding *** results show that the surface effects have more prominent influences on the nature frequency with smaller nanotube thickness,larger aspect ratio and larger elastic medium *** surface layers and the elastic medium enhance the stability of *** study might be helpful for designing the fluid-conveying nanotube devices in NEMS and MEMS systems.

关键词： surface effect fluid-conveying nanotube vibration stability

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清醒状态下置入喉罩用于肥胖患者腹腔镜子宫切除术气道管理的临床观察

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中国基层医药 2015年第9期22卷 1323-1326页

作者：李继周高彦东高静郭宇峰边步荣薛利军刘波榆林市第一医院麻醉科陕西省榆林719000

目的观察镇静镇痛口咽表面麻醉清醒状态下置入喉罩,用于肥胖患者腹腔镜子宫切除术中气道管理的临床效果.方法收集行腹腔镜子宫切除术的肥胖患者60例,按随机数字表法分为气管插管组（ET组,n=30）,喉罩组（LMA组,n=30）,观察术前并存疾... 详细信息

目的观察镇静镇痛口咽表面麻醉清醒状态下置入喉罩,用于肥胖患者腹腔镜子宫切除术中气道管理的临床效果.方法收集行腹腔镜子宫切除术的肥胖患者60例,按随机数字表法分为气管插管组（ET组,n=30）,喉罩组（LMA组,n=30）,观察术前并存疾病、麻醉用药、术中生命体征变化,气腹后60 min的气道峰压（Paw）、血气;苏醒时间;并发症发生情况等.结果气腹后60 min,ET组MAP、HR、Paw、SpO2分别为（114.6±22.4） mmHg、（108.2±19.6）次/min、（25.4±3.1） mmHg、（96.1±1.2）％,LMA组分别为（97.5±20.8） mmHg、（86.5±20.7）次/min、（22.6±3.7） mmHg、（98.9±0.8％）,两组差异均有统计学意义（均P＜0.05）;ET组血气pH、PaO2、PaCO2、BE分别为（7.34±0.05）、（177.5±44.5） mmHg、（42.6±6.1）mmHg、（-4.9±0.8 mmol/L）,LMA组分别为（7.38±0.05）、（216.7±46.6） mmHg、（38.4±5.5） mmHg、（-3.1±0.6） mmol/L,两组差异均有统计学意义（均P＜0.05）;困难气道、急症气道等并发症发生情况：ET组23例次占77％,LMA组10例次占30％,两组差异有统计学意义（P＜0.05）.结论镇静镇痛表面麻醉清醒状态下置入喉罩通气,用于肥胖患者腹腔镜子宫切除术优于快诱导气管插管,易于维持血流动力学及血气的稳定,能有效预防麻醉诱导和拔管期的困难气道、急症气道,术后恢复平稳,并发症少.

关键词：子宫切除术腹腔镜检查肥胖喉罩麻醉,表面

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2型糖尿病伴阻塞性睡眠呼吸暂停低通气综合征的临床特点和蛋白羰基水平分析

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临床耳鼻咽喉头颈外科杂志 2015年第14期29卷 1275-1278页

作者：苏丽清迟海燕李吉洲王海静孙常青威海市立医院内分泌科山东威海264200

目的:观察2型糖尿病中阻塞性睡眠呼吸暂停低通气综合征(OSAHS)的患病情况,临床特点及血清蛋白羰基水平。方法:选择2型糖尿病患者203例,进行多导联睡眠呼吸监测,记录AHI、年龄、身高、体重指数(BMI)、腰围、糖尿病病程,测定空腹血糖、糖... 详细信息

目的:观察2型糖尿病中阻塞性睡眠呼吸暂停低通气综合征(OSAHS)的患病情况,临床特点及血清蛋白羰基水平。方法:选择2型糖尿病患者203例,进行多导联睡眠呼吸监测,记录AHI、年龄、身高、体重指数(BMI)、腰围、糖尿病病程,测定空腹血糖、糖化血红蛋白(HbA1c)、血清蛋白羰基(PCO)水平。结果:2型糖尿病患者中OSAHS患病率为79.2%,其中重度30.4%,中度45.4%,轻度24.2%。伴OSAHS患者的BMI、腰围、空腹血糖、HbA1c及血清PCO水平均高于未合并OSAHS者,差别有统计学意义(P<0.01)。回归分析发现HbA1c与OSAHS患病风险呈独立正相关(P<0.05,OR=6.11),HbA1c、BMI、腰围、病程、血清PCO水平均与AHI独立正相关,HbA1c为最主要的独立危险因素(P<0.05)。结论:2型糖尿病患者中OSAHS的患病率较高,合并OSAHS的患者血糖控制差,体内蛋白质氧化损伤加重。

关键词： 2型糖尿病阻塞性睡眠呼吸暂停患病率糖化血红蛋白血清蛋白羰基

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基于OOK调制的可见光通信视频传输系统

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光通信技术 2024年第3期48卷 84-88页

作者：樊庭冰涂俊轩庄济舟倪慧琳秦琳玲吴绍龙李孝峰苏州大学光电科学与工程学院江苏苏州215006 苏州大学苏州纳米科技协同创新中心江苏苏州215006 江苏省先进光学制造技术重点实验室江苏苏州215006 教育部现代光学技术重点实验室江苏苏州215006

为了降低可见光通信(VLC)系统的误码率,设计了一种基于二进制开关键控(OOK)调制的VLC视频传输系统。该系统采用改进型4B5B编码、后均衡放大电路改善了系统误码性能,拓展了系统的-3 d B带宽,并在自适应阈值判决的基础上分析数据的相关性... 详细信息

为了降低可见光通信(VLC)系统的误码率,设计了一种基于二进制开关键控(OOK)调制的VLC视频传输系统。该系统采用改进型4B5B编码、后均衡放大电路改善了系统误码性能,拓展了系统的-3 d B带宽,并在自适应阈值判决的基础上分析数据的相关性特征,实现了OOK解调。实验结果表明:系统可以在2 m的距离下实现1080 P高清视频的实时、无失真传输;当传输速率为60 Mb/s时,改进型4B5B编码能将系统无编码时的误码率由2.2×10^(-2)降低至2.81×10^(-6)。

关键词：可见光通信开关键控 4B5B编码相关性分析视频传输

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理论计算应用于分子筛酸性表征和催化反应性能评价的研究进展

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化学与生物工程 2024年第10期41卷 9-16,43页

作者：李盛龙明邱焱吴晶杨静静项坤刘飞王海涛江吉周武汉工程大学新型催化材料湖北省工程研究中心湖北武汉430205 湖北省地质实验测试中心自然资源部稀土稀有稀散矿产重点实验室湖北武汉430034 竹山县秦巴钡盐有限公司湖北十堰442000

准确构建分子筛的活性中心特性、限域孔道与催化反应效能间的构效关系,是设计与优化高效分子筛催化剂的关键。理论计算作为实验方法的有力补充,在分子筛催化领域发挥着越来越重要的作用。在概述分子筛的结构和性质的基础上,详细介绍了... 详细信息

准确构建分子筛的活性中心特性、限域孔道与催化反应效能间的构效关系,是设计与优化高效分子筛催化剂的关键。理论计算作为实验方法的有力补充,在分子筛催化领域发挥着越来越重要的作用。在概述分子筛的结构和性质的基础上,详细介绍了分子筛的理论计算方法和模型,重点综述了理论计算在分子筛酸性表征和催化反应性能评价中的应用研究进展,并对今后分子筛催化剂理论研究的重点和方向进行了展望。

关键词：分子筛理论计算酸性表征催化反应性能评价

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