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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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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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Co_(3)O_(4)-Zn复合镀层制备及其模拟酶催化防污活性研究

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中国腐蚀与防护学报 2024年第5期44卷 1164-1176页

作者：蒋泽翟晓凡张雨孙佳文蒋全通王优强段继周侯保荣青岛理工大学机械与汽车工程学院青岛266520 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 海洋科学与技术试点国家实验室(青岛)海洋腐蚀与防护开放工作室青岛266235

将具有过氧化物酶催化活性的Co_(3)O_(4)纳米颗粒通过电沉积的方法与锌基体共沉积获得了新型的Co_(3)O_(4)-Zn金属镀层,在Co_(3)O_(4)和锌基体的共沉积过程中引入了超声波和油酸钠,在此过程中,超声波和油酸钠有力地促进了Co_(3)O_(4)在... 详细信息

将具有过氧化物酶催化活性的Co_(3)O_(4)纳米颗粒通过电沉积的方法与锌基体共沉积获得了新型的Co_(3)O_(4)-Zn金属镀层,在Co_(3)O_(4)和锌基体的共沉积过程中引入了超声波和油酸钠,在此过程中,超声波和油酸钠有力地促进了Co_(3)O_(4)在共沉积表面的分散和吸附。通过SEM、XRD、电化学测试等表征手段证明Co_(3)O_(4)以有效的结构复合到Zn基体中,而油酸钠的加入则有效地增加了Co_(3)O_(4)-Zn镀层中Co_(3)O_(4)的负载量。此外,还用大肠杆菌、金黄色葡萄球菌和铜绿假单胞菌3种典型污损细菌评估了Co_(3)O_(4)-Zn镀层的抗菌性能。Co_(3)O_(4)-Zn镀层对这3种细菌的抑制率超过98%,显示出高度和广谱的抗菌性能。研究还证明,Co_(3)O_(4)-Zn镀层在具有H2O_(2)情况下会产生超氧自由基和羟基自由基,它们在抗菌过程中起着主导的作用。最后还对复合镀层的抗菌稳定性和耐腐蚀特性进行了验证,表明复合镀层表现出良好的抗菌稳定和耐腐蚀特点。该研究结果为模拟酶催化杀菌金属基镀层的发展提供了新的可能,也为涉海设备的防污措施提供了一种新的思路。

关键词： Co_(3)O_(4)-Zn镀层超声辅助模拟酶催化抗菌电沉积油酸钠

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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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纳米材料科学 2024年第2期 244页

作者： Ying Gao Peng Ju Yu Zhang Yuxin Zhang xiaofan zhai Jizhou Duan Baorong Hou

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Interaction between sulfate-reducing bacteria and aluminum alloys——Corrosion mechanisms of 5052 and Al-Zn-In-Cd aluminum alloys

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Journal of Materials Science & Technology 2020年第1期36卷 55-64页

作者： Fang Guan Jizhou Duan xiaofan zhai Nan Wang Jie Zhang Dongzhu Lu 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 Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China

Microbiologically influenced corrosion caused by sulfate-reducing bacteria(SRB) poses a serious threat to marine engineering *** study focused on the interaction between the corrosion behavior of two aluminum alloys and SRB metabolic *** growth curve and sulfate variation with and with aluminum were performed to find the effect of two aluminum alloys on SRB metabolic *** of 5052 aluminum alloy and Al-Zn-In-Cd aluminum alloy with and without SRB were *** results showed that both the presence of 5052 and Al-Zn-In-Cd aluminum alloy promoted SRB metabolic activity,with the Al-Zn-In-Cd aluminum alloy having a smaller promotion effect compared with 5052 aluminum *** electrochemical results suggested that the corrosion of the Al-Zn-In-Cd aluminum alloy was accelerated substantially by ***,SRB led to the transformation of Al-Zn-In-Cd aluminum alloy corrosion product from Al(OH)3 to Al2 S3 and NaAlO2.

关键词： Aluminum alloy Sulfate-reducing bacteria(SRB) Electrochemical behavior Corrosion

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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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Biofilm inhibition mechanism of BiVO4 inserted zinc matrix in marine isolated bacteria

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Journal of Materials Science & Technology 2021年第16期75卷 86-95页

作者： xiaofan zhai Peng Ju Fang Guan Jizhou Duan Nan Wang Yimeng Zhang Ke Li Baorong Hou CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of Oceanology Chinese Academy of Sciences Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and Technology (Qingdao) Center for Ocean Mega-Science Chinese Academy of Sciences Key Laboratory of Marine Eco-Environmental Science and Technology Marine Bioresource and Environment Research Center First Institute ofOceanography Ministry of Natural Resources (MNR) Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology (Qingdao)

Biofilm plays an important role on microbial corrosion and biofouling in marine environments. Inhibiting biofilm formation on construction surfaces is of great importance. Photocatalytic material with visiblelight response, especially BiVO4, is regarded as a promising material for biofilm inhibition due to its green biocidal effect and high antibacterial efficiency. Approaches which can immobilize the photocatalytic particles onto metal surfaces with high mechanical strength are requisite. In this study, zinc matrixes were served as carriers for BiVO4particles. The BiVO4-inserted zinc matrixes were successfully obtained by ultrasound assisted electrodeposition. The insertion content of BiVO4showed positive correlation with ultrasound power. Highly enhanced biofilm inhibition properties were obtained by BiVO4inserted zinc·matrixes with an over 95 % decreased bacterial coverage. It was proved that O2-(chief) andOH(subordinate) radicals were responsible for the high biocidal performance. Possible antibacterial mechanism was proposed, indicating that the photoinduced holes would both attack zinc crystals to generate active electrons to form O2-radicals, and react with H2O to generate·OH, finally. Furthermore, corrosion resistance of the matrixes was proved to be stable due to the insertion of BiVO4. This study provides a potential application for photocatalyst in marine antifouling and anti-biocorrosion aspects.

关键词： Biofilm inhibition BiVO 4 Zinc matrix BiVO 4 -Zn composite coating Marine antifouling Corrosion resistance

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1D Bi_(2)S_(3) nanorods modified 2D BiOI nanoplates for highly efficient photocatalytic activity:Pivotal roles of oxygen vacancies and Z-scheme heterojunction

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Journal of Materials Science & Technology 2023年第11期142卷 45-59页

作者： Peng Ju Yu Zhang Lei Hao Jiazhen Cao xiaofan zhai Kunpeng Dou Fenghua Jiang Chengjun Sun Key Laboratory of Marine Eco-Environmental Science and Technology Marine Bioresource and Environment Research CenterFirst Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Laboratory of Marine Drugs and Bioproducts Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao 266071China Department of Chemical Product Engineering College of Chemical Engineering and TechnologyTaiyuan University of TechnologyTaiyuan 030024China College of Information Science and Engineering Ocean University of ChinaQingdao 266100China

In this study,a novel Bi_(2)S_(3)/BiOI Z-scheme photocatalyst with 3D porous hierarchical network-like heterostructure(BSBI NHs)and rich oxygen vacancies(OVs)was fabricated by a facile ion exchange method followed by the in-situ growth process.A possible formation mechanism of BSBI NHs was studied,showing the self-assembled process of in-situ interwoven growth of 1D Bi_(2)S_(3) nanorods(NRs)on the surface of 2D BiOI disk-like nanoplates(NPs),which followed the Ostwald ripening and epitaxial *** modification of BiOI NPs by Bi_(2)S_(3) NRs brought about the formation of Z-scheme heterojunction and massive OVs,which improved the visible-light response property and promoted the separation of photoexcited charge carriers of BSBI *** NHs exhibited a significantly enhanced photocatalytic activity compared with Bi_(2)S_(3) and BiOI,and BSBI-1 can remove almost all bacteria and Rhodamine B(RhB)after 60 min visible light *** addition,the photocatalytic mechanism was studied and speculated based on the tests of active species capture,electron spin resonance(ESR),and density functional theory(DFT)simulation calculation,proving the primary roles of·OH,·O_(2)^(-)and h^(+)during the photocatalytic *** work provides new insights into the design and exploitation of novel heterojunctions with highly efficient photocatalytic performances for environmental remediation applications.

关键词： Antifouling Biofouling BiOI Photocatalysis Bi_(2)S_(3)

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In-situ topotactic construction of novel rod-like Bi_(2)S_(3)/Bi_(5)O_(7)I p-n heterojunctions with highly enhanced photocatalytic activities

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Journal of Materials Science & Technology 2023年第4期135卷 126-141页

作者： Peng Ju Lei Hao Yu Zhang Jianchao Sun Kunpeng Dou Zhaoxia Lu Dankui Liao xiaofan zhai Chengjun Sun Key Laboratory of Marine Eco-Environmental Science and Technology Marine Bioresource and Environment Research CenterFirst Institute of OceanographyMinistry of Natural ResourcesQingdao266061P.R.China CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao266071P.R.China Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao266237P.R.China School of Environment and Material Engineering Yantai UniversityYantai264005P.R.China College of Chemistry and Chemical Engineering Guangxi Key Laboratory of Petrochemical Resources Processing and Process Enhancement TechnologyGuangxi UniversityNanning530004P.R.China College of Information Science and Engineering Ocean University of ChinaQingdao266100P.R.China

In this work,a novel Bi_(2)S_(3)/Bi_(5)O_(7)I p-n heterojunction with three-dimensional rod-like nanostructure was successfully constructed through an in-situ topotactic ion exchange approach.A possible evolution mech-anism from Bi_(5)O_(7)I nanobelts(NBs)into Bi_(2)S_(3)/Bi_(5)O_(7)I rod-like heterostructures(BSI RHs)was proposed,depicting the self-assembly process of internal Bi_(5)O_(7)I NBs and outside networks interwoven by Bi_(2)S_(3)nanorods(NRs),which abided by the Ostwald ripening and epitaxial *** to the formation of p-n heterojunction and rich oxygen vacancies(OVs),the visible-light absorption ability and separation of photogenerated charge carriers of BSI RHs were highly promoted,leading to a greatly improved photocatalytic ability than that of Bi_(2)S_(3)and Bi_(5)O_(7)***-1 exhibited the strongest photocatalytic performance,and almost all rhodamine B(RhB)and Pseudomonas aeruginosa(***)can be thoroughly removed within 90 ***,a possible photocatalytic mechanism of BSI RHs was proposed based on the tests of active species trapping,electron spin resonance(ESR),photoelectrochemistry(PEC),and photoluminescence(PL)combined with the density functional theory(DFT)simulated computation,vali-dating the dominating roles of·O_(2)^(−)and h+during the photocatalytic *** work is expected to motivate further efforts for developing novel heterostructures with highly efficient photocatalytic performances,which presents a promising application prospect in the fields of energy and environment.

关键词： Antifouling Bi_(5)O_(7) I Photocatalytic Heterostructure Bi_(2)S_(3)

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Local Torrential Rainfall Event within a Mei-Yu Season Mesoscale Convective System:Importance of Back-Building Processes

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Advances in Atmospheric Sciences 2024年第5期41卷 847-863页

作者： Honglei ZHANG Ming XUE Hangfeng SHEN xiaofan LI Guoqing zhai Zhejiang Institute of Meteorological Sciences Hangzhou 310017China Center for Analysis and Prediction of Storms and School of MeteorologyUniversity of OklahomaNormanOklahoma 73072USA Department of Atmospheric Science School of Earth SciencesZhejiang UniversityHangzhou 310027China Hangzhou Weather Bureau Hangzhou 310007China

An extreme rainfall event occurred over Hangzhou,China,during the afternoon hours on 24 June *** event occurred under suitable synoptic conditions and the maximum 4-h cumulative rainfall amount was over 150 *** rainfall event had two major *** was caused by a quasi-stationary convective line,and the other by a backbuilding convective line related to the interaction of the outflow boundary from the first rainband and an existing low-level mesoscale convergence line associated with a mei-yu frontal *** rainfall event lasted 4 h,while the back-building process occurred in 2 h when the extreme rainfall center *** far,few studies have examined the back-building processes in the mei-yu season that are caused by the interaction of a mesoscale convergence line and a convective cold *** two rainbands are successfully reproduced by the Weather Research and Forecasting(WRF)model with fourlevel,two-way interactive *** the model,new cells repeatedly occur at the west side of older cells,and the backbuilding process occurs in an environment with large CAPE,a low LFC,and plenty of water *** from older cells enhance the low-level convergence that forces new *** precipitation efficiency of the back-building training cells leads to accumulated precipitation of over 150 *** experiments without evaporation of rainwater show that the convective cold pool plays an important role in the organization of the back-building process in the current extreme precipitation case.

关键词： torrential rainfall back-building processes numerical simulation trigger mechanism convergence line convective cold pool

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