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Double enzyme mimetic activities of multifunctional Ag nanoparticle-decorated Co_(3)V_(2)O_(8)hollow hexagonal prismatic pencils for application in colorimetric sensors and disinfection

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Nano Materials Science 2024年第2期6卷 244-255页

作者： Ying Gao Peng Ju Yu Zhang Yuxin Zhang Xiaofan Zhai jizhou duan Baorong Hou Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao266071PR China Key Laboratory of Marine Eco-Environmental Science and Technology Marine Bioresource and Environment Research CenterFirst Institute of OceanographyMinistry of Natural ResourcesQingdao266061PR China University of Chinese Academy of Sciences Beijing100049PR China Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao266071PR China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao266071PR China College of Materials Science and Engineering Chongqing UniversityChongqing400044China

Since the catalytic activity of most nanozymes is still far lower than the corresponding natural enzymes,there is urgent need to discover novel highly efficient enzyme-like *** this work,Co_(3)V_(2)O_(8)with hollow hexagonal prismatic pencil structures were prepared as novel artificial enzyme *** were then decorated by photo-depositing Ag nanoparticles(Ag NPs)on the surface to further improve its catalytic *** Ag NPs decorated Co_(3)V_(2)O_(8)(ACVPs)showed both excellent oxidase-and peroxidase-like catalytic *** can oxidize the colorless 3,3’,5,5’-tetramethylbenzidine rapidly to induce a blue *** enhanced enzyme mimetic activities can be attributed to the surface plasma resonance(SPR)effect of Ag NPs as well as the synergistic catalytic effect between Ag NPs and Co_(3)V_(2)O_(8),accelerating electron transfer and promoting the catalytic *** were applied in constructing a colorimetric sensor,validating the occurrence of the Fenton reaction,and disinfection,presenting favorable catalytic *** enzyme-like catalytic mechanism was studied,indicating the chief role of⋅O_(2)-radicals in the catalytic *** work not only discovers a novel functional material with double enzyme mimetic activity but also provides a new insight into exploiting artificial enzyme mimics with highly efficient catalytic ability.

关键词： Co_(3)V_(2)O_(8) Ag NPs Enzyme mimetic Colorimetric sensor Disinfection

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Desulfovibrio Bizertensis SY-1在阴极极化条件下对X70管线钢的腐蚀行为研究

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中国腐蚀与防护学报 2024年第2期44卷 345-354页

作者：裴莹莹管方董续成张瑞永段继周侯保荣中国科学院海洋研究所海洋环境腐蚀与生物污损重点实验室青岛266071 中国科学院大学北京100049 南通中科海洋科学与技术研究发展中心南通226333

研究了从浸泡在中国南海的钢铁锈层中分离的腐蚀性硫酸盐还原菌Desulfovibrio bizertensis SY-1在-0.85和-1.05 V ***阴极极化电位下对X70管线钢腐蚀行为的影响。结果表明,-0.85 V ***电位尚不能有效抑制Desulfovibrio bizertensis SY-... 详细信息

研究了从浸泡在中国南海的钢铁锈层中分离的腐蚀性硫酸盐还原菌Desulfovibrio bizertensis SY-1在-0.85和-1.05 V ***阴极极化电位下对X70管线钢腐蚀行为的影响。结果表明,-0.85 V ***电位尚不能有效抑制Desulfovibrio bizertensis SY-1细胞的生长与附着,同时试片表面也检测到了特征的四方硫铁矿和针铁矿的Raman峰。-1.05 V ***阴极极化电位能够有效抑制浮游Desulfovibrio bizertensis SY-1细胞的生长和代谢过程,腐蚀产物以磁铁矿为主。失重数据也表明,在-1.05 V ***电位下试片失重与无菌条件基本一致,且在该电位下最大点蚀坑深度与无极化条件相比减少了75%。该研究为含有Desulfovibrio bizertensis SY-1环境的阴极保护电位选择和微生物与极化电位的相互作用研究提供了参考。

关键词：硫酸盐还原菌阴极极化 X70 管线钢微生物腐蚀

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三亚海洋环境试验站污损生物生态研究

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中国腐蚀与防护学报 2024年第1期44卷 38-46页

作者：马士德陈新邰余任海滔韩文郭为民段继周中国科学院海洋研究所青岛266071 海南大学理学院海口570228 青岛东启机械设备有限公司青岛266071 中国船舶集团有限公司第七二五研究所三亚海洋环境试验站三亚572029 中国船舶集团有限公司第七二五研究所青岛分部青岛266101

三亚试验站的海水实验池中污损生物群落呈现物种少、密度低、个体小的特点,这与三亚自然海域及其他热带海域的情况差异较大。通过调查试验站污损生物生态分布特点,并对试验站水池结构、水质及灾害性水文气象进行了分析,表明由于试验水... 详细信息

三亚试验站的海水实验池中污损生物群落呈现物种少、密度低、个体小的特点,这与三亚自然海域及其他热带海域的情况差异较大。通过调查试验站污损生物生态分布特点,并对试验站水池结构、水质及灾害性水文气象进行了分析,表明由于试验水泥池结构改变了池内与池外自然海水的流动和交换状态,池内海水中叶绿素a及硝酸盐的浓度只有三亚湾的1/5~1/6;此外,风暴潮会在试验水池内产生高强度的冲刷,低潮位时曝晒对池壁产生较强的热效应,还存在持续5 h以上的强暴雨等极端自然灾害的侵害,这些因素导致水池水泥壁潮差区形成的污损生物群落中物种很少,都以能耐受极端环境的咬齿牡蛎为优势种,在全浸五年以上的表面无毒试板表面,也仅有稀少的管栖多毛类和厦门牡蛎附着。另外,非钝性黑色金属腐蚀率远大于在三亚其他海域的腐蚀率。本研究揭示天然海域中的人为设施会明显改变其中污损生物群落组成和结构,进而影响对材料防污性能及腐蚀过程的准确检测和评价结果。

关键词：三亚站海水试验池污损生物群落生态

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合成水化硅酸钙(C-S-H)对水泥基材料Cl^(-)结合性能的影响

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中国腐蚀与防护学报 2024年第1期44卷 197-203页

作者：张余果孙丛涛张鹏孙明耿圆洁樊亮翟晓凡段继周青岛理工大学土木工程学院青岛266033 中国科学院海洋研究所海洋环境腐蚀与生物污损重点实验室青岛266071 崂山实验室海洋腐蚀与防护开放工作室青岛266237 内蒙古科技大学土木工程学院包头014010

通过合成水化硅酸钙(C-S-H),研究了内掺C-S-H对水泥净浆Cl^(-)结合性能的影响。采用XRD、TG-DTG、SEM以及EDS分析了水泥水化产物随龄期的物相演化和微观形貌变化。结果表明,净浆试件中自由Cl^(-)含量随龄期的增加皆呈先下降后上升的趋... 详细信息

通过合成水化硅酸钙(C-S-H),研究了内掺C-S-H对水泥净浆Cl^(-)结合性能的影响。采用XRD、TG-DTG、SEM以及EDS分析了水泥水化产物随龄期的物相演化和微观形貌变化。结果表明,净浆试件中自由Cl^(-)含量随龄期的增加皆呈先下降后上升的趋势。在龄期7、14和21 d时,掺加C-S-H组净浆自由Cl-含量均大于未掺加C-S-H组,这是因为掺加的C-S-H粒径相对较大,比表面积相对较小,使得净浆中C-S-H总比表面积减小,降低了C-S-H对Cl-的结合;其次,在水泥净浆中掺加C-S-H能够促进水泥水化,提高水化早期pH值,高pH值也不利于C-S-H对Cl-的吸附;再次,掺加C-S-H净浆水化早期无Friedel’s盐生成,化学结合Cl^(-)能力较弱。在龄期28 d时,掺加C-S-H组净浆中有Friedel’s盐的生成,化学结合提高了Cl^(-)结合量,故两组净浆自由Cl^(-)含量较为相近。由于28 d时掺加C-S-H组净浆中存在较多SiO_(2),易发生火山灰反应生成低钙硅比的C-S-H以及pH值降低影响Friedel’s盐稳定性,使得35 d时自由Cl^(-)含量上升明显。

关键词：水泥净浆 Cl^(-) 水化硅酸钙 Cl^(-)结合 pH值

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Poly(dimethyl siloxane)anti-corrosion coating with wide pH-responsive and self-healing performance based on core-shell nanofiber containers

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Journal of Materials Science & Technology 2022年第6期101卷 128-145页

作者： Xiaohong Ji Wei Wang Xia Zhao Lifei Wang Fubin Ma Yanli Wang jizhou duan Baorong Hou Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao 266071China School of Materials Science and Engineering Ocean University of China238 Songling RoadQingdao 266100China Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and TechnologyQingdao 266237China Center for Ocean Mega-Science Chinese Academy of ScienceQingdao 266071China School of Chemistry and Chemical Engineering Guangxi UniversityNanning 530004China

In this research,core-shell electrospun fibers loaded with the shell of cellulose acetate and the core of oleic acid and alkyd varnish resin were synthesized and used within poly(dimethyl siloxane)(PDMS)to prepare self-healing and p H-responsive coatings for a steel *** morphology of the electrospun fibers was characterized by scanning electron microscopy,transmission electron microscopy and confocal fluorescence *** gravimetric analysis and Fourier transform infrared spectroscopy revealed that the self-healing agents were loaded successfully with a loading rate of 2.9%.The properties of the fiber-PDMS composite coating were characterized by water contact angle measurements,mechanical tests,electrochemical impedance spectroscopy,and scanning Kelvin *** show that the maximum self-healing efficiencies of the fiber-PDMS coating in alkaline and acidic solution are 95.96%and 97.04%,*** composition of the self-healing agents at the damaged part of the coating was verified by an infrared mapping test and using an energy dispersive *** addition,the sandpaper abrasion test shows the hydrophobic effect of fiber-PDMS coating remains above 88.2%and decreases slightly through the addition of abrasion *** research can pave the way for the industrial applications of p H-responsive self-healing coatings.

关键词： Core-shell fibers Self-healing coating Oleic acid Hydrophobic effect

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Green synthesis of functional metallic nanoparticles by dissimilatory metal-reducing bacteria“Shewanella”:A comprehensive review

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Journal of Materials Science & Technology 2023年第27期158卷 63-76页

作者： Jing Yang Peng Ju Xucheng Dong jizhou duan Hui Xiao Xuexi Tang Xiaofan Zhai Baorong Hou CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao 266071China Open studio for marine Corrosion and Protection Qingdao National Laboratory for Marine Science and TechnologyQingdao 266235China College of Marine Life Sciences Ocean University of ChinaQingdao 266003China Key Laboratory of Marine Eco-Environmental Science and Technology Marine Bioresource and Environment Research CenterFirst Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Sanya Institute of Ocean Eco-Environmental Engineering Sanya 572000China Institute of Marine Corrosion Protection Guangxi Key Laboratory of Marine Environmental ScienceGuangxi Academy of SciencesNanning 530007China

The biosynthesis strategy of nanoparticles has attracted much attention due to the mild synthesis condi-tions,environmental-friendly properties,and low *** nanoparticles(bio-NPs)not only show excellent physicochemical properties,but also exhibit high stability,enlarged specific surface area,and excellent biocompatibility,which are crucial for industrial,agricultural,and medical ***-wanella,a kind of dissimilatory metal-reducing bacteria,is regarded as a typical biosynthesis-functional bacteria class with wide distribution and strong ***,in this paper,functional bio-NPs by Shewanella were reviewed to provide a comprehensive view of current research *** biosynthetic mechanisms of Shewanella are summarized as the Mtr pathway(predominant),extracellular polymeric substance-induced pathway,and enzyme/protein-induced *** the biosynthesis process,bio-logical factors along with the physicochemical parameters highly influenced the properties of the resul-tant *** now,bio-NPs have been applied in various fields including environmental remediation,antibacterial applications,and microbial fuel ***,some challenging issues of bio-NPs by She-wanella remain unsolved,such as optimizing suitable bacterial strains,intelligently controlling bio-NPs,clarifying biosynthesis mechanisms,and expanding bio-NPs applications.

关键词： Shewanella strains Functional metallic nanoparticles Green biosynthesis Metal reduction

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Facile fabrication of self-healing silicone-based poly(urea-thiourea)/tannic acid composite for anti-biofouling

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Journal of Materials Science & Technology 2022年第29期124卷 1-13页

作者： Jiawen Sun Chao Liu jizhou duan Jie Liu Xucheng Dong Yimeng Zhang Ning Wang Jing Wang Baorong Hou Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao 266071China Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China University of Chinese Academy of Sciences Beijing 100039China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China College of Resources and Environment Hunan Agricultural UniversityChangsha 410128China

A novel silicone-based poly(urea-thiourea)/tannic acid composite(PDMS-P(Ua-TUa)-TA)with excellent mechanical,self-healing and antifouling properties is *** multiple dynamic hydrogen bonds formed by thiourea groups,urea groups,and tannic acid(TA)molecules ensured a tough elastomer(ultimate strength:2.47 MPa)with high stretchability(~1000%).TA molecules as partial hydrogen bonding cross-linking sites interacted rapidly with urea and thiourea groups before the migration of polymer chains,resulting in fast and efficient *** on the film completely disappeared within12 min,and the repair efficiency of strength was up to 98.4%within 3 h under ambient *** behavior was also evaluated in artificial seawater and the healing efficiency(HE)was 95.1%.Furthermore,TA uniformly dispersed in the polymer matrix provides good antibacterial and anti-diatom properties,as well as strong adhesion to the substrate(~2.2 MPa).Laboratory bioassays against marine bacteria adhesion(~96%,~95%and~93%reduction for ***.,***,and ***,respectively)and diatom attachment(~84%reduction)demonstrated an outstanding antifouling property of the PDMSP(Ua-TUa)-*** work provides a promising pathway towards the development of high-performance silicone-based coatings for marine anti-biofouling.

关键词： Poly(dimethylsiloxane) Poly(urea-thiourea) Self-healing Hydrogen bonding Marine antifouling Tannic acid

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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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Developing high photocatalytic antibacterial Zn electrodeposited coatings through Schottky junction with Fe3+-doped alkalized g-C_(3)N_(4) photocatalysts

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Nano Materials Science 2023年第2期5卷 177-188页

作者： Ying Gao Xiaofan Zhai Yuxin Zhang Fang Guan Nazhen Liu Xiutong Wang Jie Zhang Baorong Hou jizhou duan Key Laboratory of Marine Environmental Corrosion and Bio-Fouling Institute of OceanologyChinese Academy of SciencesQingdao266071China University of Chinese Academy of Sciences Beijing100049China Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao266071China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao266071China College of Materials Science and Engineering Chongqing UniversityChongqing400044China

Pure Zn coatings easily lose their protective performance after biofouling because they have no antibacterial effect under visible *** this study,we fabricate a new antibacterial Zn composite coating using electrodeposition to couple Fe3+-doped alkalized g-C_(3)N_(4)(AKCN-Fe)into an existing Zn coating and show that the AKCN-Fe enhances antibacterial property of the Zn coating under visible *** attribute this enhancement to the high photocatalytic performance,high loading content,and good dispersion of *** addition,the photocatalytic antibacterial mechanism of the composite coating is supported by scavenger experiments and electron paramagnetic resonance(EPR)measurements,suggesting that superoxide(·O_(2)^(-))and hydroxyl radical(·OH)play main and secondary roles,respectively.

关键词： g-C_(3)N_(4) Electrodeposition Zn coating Photocatalytic antibacterial mechanism

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A universal design for triggering the precise micro-structure reconstruction through in-situ electro-regulating to boost the pseudocapacitance of MnO_(2)

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Journal of Energy Chemistry 2022年第11期31卷 184-197,I0006页

作者： Lijin Yan Jiangyu Hao Baibai Liu Xuefeng Zou Qibin Wu Jin Hou jizhou duan Shicheng Wei Yang Zhou Bin Xiang Baorong Hou College of Chemistry and Chemical Engineering Chongqing UniversityChongqing 401331China College of Optoelectronic Engineering Chongqing UniversityChongqing 400044China Guizhou Provincial Key Laboratory of Computational Nano-Material Science Guizhou Normal UniversityGuiyang 550018GuizhouChina College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266100ShandongChina Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao 266071ShandongChina National Key Laboratory for Remanufacturing Army Academy of Armored ForcesBeijing 100072China Analytical and Testing Center of Chongqing University Chongqing UniversityChongqing 401331China

Developing a precise controllable strategy for modulating the micro-morphology,atom coordination environment,and electronic structure of electrode materials is crucial for the performance in the field of energy storage,yet still a tremendous ***,a facile and universal in-situ electrochemical self-optimization design,electro-regulating,is designed to controllably produce electrode materials with abundant *** detailed characterization studies,the microstructure of MnO_(2) is reconstructed after electro-regulating,which exhibits a structure of small fragments with numerous holes due to the partial self-dissolution of acidic oxides under an alkaline operating ***,the electro-regulating strategy not only presents the formation steps of numerous holes but is also accompanies by a number of O vacancies generation process due to the activation of an external electric *** study provides a new inspiration for reasonably designing advanced functional electrode materials for various electrochemical applications and beyond.

关键词： Electro-regulating Microstructure reconstructed MnO_(2) Corrosion resistance Supercapacitors

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