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Nano research 2018年第2期11卷 988-996页

作者： Xiaoxia Wang Jianmei Wang Xuping Sun Shuang Wei Liang Cui Wenrong Yang Jingquan Liu College of Materials Science and Engineering Institute for Graphene Applied Technology Innovation Qingdao University Qingdao China College of Chemistry Sichuan University Chengdu China School of Life and Environmental Sciences Deakin University Geelong Australia

Novel hierarchical coral-like Ni-Mo sulfides on Ti mesh （denoted as HC-NiMoSfri） were synthesized through facile hydrothermal and subsequent sulfuration processes without any template. These non-precious HC-NiMoS/Ti hybrids were explored as bifunctional catalysts for urea-based overall water splitting, including the anodic urea oxygen evolution reaction （UOR） and cathodic hydrogen evolution reaction （HER）. Due to the highly exposed active sites, excellent charge transfer ability, and good synergistic effects from multi-component reactions, the HC-NiMoS/Ti hybrid exhibited superior activity and high stability, and only a cell voltage of 1.59 V was required to deliver 10 ***-2 current density in an electrolyte of 1.0 M KOH with 0.5 M urea.

关键词： urea electrolysis Ni-Mo sulfide coral-like bifunctional catalysts superior activity

Numerical study of seabed response and liquefaction around a jacket support offshore wind turbine foundation under combined wave and current loading

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Water Science and Engineering 2022年第1期15卷 78-88页

作者： Shu-xin Wei Zuo-dong Liang Lin Cui Hua-ling Zhai Dong-sheng Jeng School of Civil Engineering Qingdao University of TechnologyQingdao 266033China School of Civil Engineering Southwest Jiaotong UniversityChengdu 610031China School of Engineering&Built Environment Griffith University Gold Coast CampusQueensland 4222Australia

The seabed instability induced by the transient liquefaction when exposed to wave-current may threaten the safety of offshore *** this study,the Reynolds-averaged Navier-Stokes(RANS)equations with the k-e turbulence model were used to imitate the fluid dynamics,and Biot's poro-elastic theory was used to simulate the transient seabed *** in-house solver(porous-fluid-seabed-structure interactions-field operation and manipulation)integrating the flow model and seabed model with the finite volume method was *** present model was confirmed with published experimental results and then used to analyze the dynamic process of the fluid-seabed-structure interactions as well as seafloor liquefaction around the jacket foundation under wave-current *** simulated results showed that the depth and range for the liquefaction area around the jacket foundation tended to increase at first and then declined as the wave propagated forward in the absence of *** addition,the results demonstrated that the liquefaction depth under current and wave in the same orientation was greater than that without *** is worth mentioning that the downstream piles were more prone to liquefaction than the upstream piles when the forward current existed.

关键词： Jacket Wave and current Liquefaction Seafloor dynamic Fluid-seabed-structure interactions

Thickness-Dependent Microstructure and its Effect on Anisotropic Mechanical Properties of Duplex Stainless Steel 2205 Multi-pass Welded Joints

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Acta Metallurgica Sinica(English Letters) 2023年第11期36卷 1883-1892页

作者： Zhilong Dong Xue-Fang Xie Jingwen Li Yu Wan State Key Laboratory of Heavy Oil Processing College of New EnergyChina University of Petroleum(East China)Qingdao266580China China National Offshore Oil Corporation Petrochemical Engineering Company Limited Jinan250000China

In this study,the thickness-dependent microstructural characteristics of duplex stainless steel 2205 multi-pass welded joints were first investigated by the combination of optical microscope and electron back-scattered diffraction ***,a series of tensile tests of miniature samples cut from different passes and directions were performed to analyze the thickness-dependent and anisotropic mechanical *** results demonstrate that the microstructure changed with the welded passes,i.e.,a large number of grain boundary austenite,Widmanstätten austenite and a small number of tiny intragranular austenite existed at the surface passes,while a mass of intragranular austenite were found at the middle ***,the Kurdjumov–Sachs orientation relationship was widespread at the welded *** addition,the yield and tensile strengths of the middle passes were greater than that of the surface passes due to the grain-boundary strengthening by tiny intragranular ***,due to the existence of Kurdjumov–Sachs orientation relationship,the longitudinal yield and tensile strength were greater than transverse values,particularly for the middle passes.

关键词： Duplex stainless steel Multi-pass welded joints Thickness-dependent microstructure Anisotropic mechanical properties

Effects of probiotic on microfloral structure of live feed used in larval breeding of turbot Scophthalmus maximus

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Journal of Oceanology and Limnology 2018年第3期36卷 1002-1012页

作者： JIANG Yan ZHANG Zheng WANG Yingeng JING Yayun LIAO Meijie RONG Xiaojun LI Bin CHEN auiping ZHANG Hesen Yellow Sea Fisheries research Institute Chinese Academy of Fishery SciencesLaboratory for Marine Fisheries Science and Food Production ProcessesQingdao National Laboratory for Marine Science and TechnologyQingdao 266071China qingdao General Aquatic Co.Ltd. Qingdao 266000China

The effects of an exogenous probiotic( Bacillus amyloliquefaciens) on microbial community structure of B ranchionus plicatils and A rtemia sinica were evaluated in this study during turbot( Scophthalmus maximus) larval breeding. The analysis and comparison of the microfloral composition of live feed with probiotic was conducted using the Illumina HiSeq PE250. The abundance of microbial species and diversity of microflora in live feed with B. amyloliquefaciens were higher than those in the control. The microfloral composition was similar among the three replicate experimental groups of B. plicatils compared with the control after enrichment. L actococcus, Pseudoalteromonas, and Alteromonas were always dominant. Additionally, some other bacterial species became dominant during the enrichment process. The microbial community during nutrient enrichment of A. sinica was rather similar among the three control replicates. Relative abundance of Cobetia sp., the most dominant species, was 54%–65.2%. Similarity in the microbial community was still high after adding B. amyloliquefaciens. Furthermore, P seudoalteromonas and Alteromonas replaced Cobetia as the dominant species, and the abundance of Cobetia decreased to 4.3%–25.3%. Mean common ratios at the operational taxonomic unit level were 50%–60% between the two B. plicatils and A. sinica treatments. Therefore, the microbial community structure changed after adding B. amyloliquefaciens during nutrient enrichment of B. plicatils or A. sinica and tended to stabilize. Additionally, the abundance of V ibrio in any kind of live feed was not significantly dif ferent from that in the control. These results will help improve the microflora of B. plicatils and A. sinica and can be used to understand the multiple-level transfer role of probiotic species among probiotic products, microflora of live feed, and fish larvae.

关键词： Branchionus plicatils Artemia sinica microfloral structure Bacillus amyloliquefaciens Scophthalmus maximus larval breeding

LPCS Ni-Zn-Al_(2)O_(3) Intermediate Layer Enhanced SPS NiCr-Cr_(3)C_(2) Coating with Higher Corrosion and Wear Resistances

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Journal of Wuhan University of Technology(Materials Science) 2024年第1期39卷 188-195页

作者：白杨 LI Yan XING Lukuo LI Xiangbo WANG Zhenhua State Key Laboratory of Marine Coatings Marine Chemical Research Institute Co.Ltd.Qingdao 266071China College of Mechanical and Electrical Engineering University of China Petroleum(East China)Qingdao 266580China Science and Technology on Marine Corrosion and Protection Laboratory Luoyang Ship Materials Research InstituteQingdao 266101China

The double-layer NiCr-Cr_(3)C_(2)/Ni-Zn-Al_(2)O_(3) coatings with sufficient corrosion and wear resistance were prepared on low carbon steel *** intermediate layers Ni-Zn-Al_(2)O_(3) were fabricated by using low-pressure cold spray (LPCS) method to improve the salt fog corrosion resistance properties of the supersonic plasma spray (SPS) NiCr-Cr_(3)C_(2) *** friction and wear performance for the double-layer and single-layer NiCr-Cr_(3)C_(2) coatings were carried out by line-contact reciprocating sliding,*** with the coating surface analysis techniques,the effect of the salt fog corrosion on the tribological properties of the double-layer coatings was *** results showed that the double-layer coatings exhibited better wear resistance than that of the single-layer coatings,due to the better corrosion resistance of the intermediate layer;the wear mass losses of the double-layer coatings was reduced by 70%than that of the single layer coatings and the wear mechanism of coatings after salt fog corrosion conditions is mainly corrosion wear.

关键词： low-pressure cold spray NiCr-Cr_(3)C_(2)coating wear behavior salt fog corrosion

Green microfluidics in microchemical engineering for carbon neutrality

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Chinese Journal of Chemical Engineering 2023年第1期53卷 332-345页

作者： Qingming Ma Jianhong Xu School of Pharmacy Qingdao UniversityQingdao 266021China The State Key Laboratory of Chemical Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

The concept of“carbon neutrality”poses a huge challenge for chemical engineering and brings great opportunities for boosting the development of novel technologies to realize carbon offsetting and reduce carbon *** high-efficient,low-cost,energy-efficient and eco-friendly microfluidicbased microchemical engineering is of great *** kind of“green microfluidics”can reduce carbon emissions from the source of raw materials and facilitate controllable and intensified microchemical engineering processes,which represents the new power for the transformation and upgrading of chemical engineering ***,a brief review of green microfluidics for achieving carbon neutral microchemical engineering is presented,with specific discussions about the characteristics and feasibility of applying green microfluidics in realizing carbon *** of green microfluidic systems are categorized and reviewed,including the construction of microfluidic devices by bio-based substrate materials and by low carbon fabrication methods,and the use of more biocompatible and nondestructive fluidic systems such as aqueous two-phase systems(ATPSs).Moreover,low carbon applications benefit from green microfluidics are summarized,ranging from separation and purification of biomolecules,high-throughput screening of chemicals and drugs,rapid and cost-effective detections,to synthesis of fine chemicals and novel ***,challenges and perspectives for further advancing green microfluidics in microchemical engineering for carbon neutrality are proposed and discussed.

关键词： Microchemical engineering Carbon neutrality Microfluidics Aqueous two-phase systems(ATPSs) Environment Chemical processes

Flexible Conductive Anodes Based on 3D Hierarchical Sn/NS-CNFs@rGO Network for Sodium-Ion Batteries

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Nano-Micro Letters 2019年第4期11卷 133-146页

作者： Linqu Luo Jianjun Song Longfei Song Hongchao Zhang Yicheng Bi Lei Liu Longwei Yin Fengyun Wang Guoxiu Wang College of Physics and State Key Laboratory of Bio-Fibers and Eco-Textiles Qingdao UniversityQingdao 266071People’s Republic of China College of Electromechanical Engineering Qingdao University of Science and TechnologyNo.99 Songling RoadQingdao 260061ShandongPeople’s Republic of China School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590People’s Republic of China School of Materials Science and Engineering Shandong UniversityJinan 250061People’s Republic of China Centre for Clean Energy Technology University of Technology SydneyBroadwaySydneyNSW 2007Australia

Metallic Sn has provoked tremendous progress as an anode material for sodium-ion batteries(SIBs).However,Sn anodes suffer from a dramatic capacity fading,owing to pulverization induced by drastic volume expansion during ***,a flexible three-dimensional(3D)hierarchical conductive network electrode is designed by constructing Sn quantum dots(QDs)encapsulated in one-dimensional N,S codoped carbon nanofibers(NS-CNFs)sheathed within two-dimensional(2D)reduced graphene oxide(rGO)*** this ingenious strategy,1D NS-CNFs are regarded as building blocks to prevent the aggregation and pulverization of Sn QDs during sodiation/desodiation,2D rGO acts as electrical roads and“bridges”among NS-CNFs to improve the conductivity of the electrode and enlarge the contact area with *** of the unique structural merits,the flexible 3D hierarchical conductive network was directly used as binder-and current collectorfree anode for SIBs,exhibiting ultra-long cycling life(373 mAh g?1 after 5000 cycles at 1 A g?1),and excellent high-rate capability(189 mAh g?1 at 10 A g?1).This work provides a facile and efficient engineering method to construct 3D hierarchical conductive electrodes for other flexible energy storage devices.

关键词： Flexible electrodes N S co-doped carbon nanofibers Reduced graphene oxide Sn quantum dots Sodium-ion batteries

Perturbation effect of rock rheology under uniaxial compression

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Journal of Central South University 2017年第7期24卷 1684-1695页

作者： GAO Yan-fa HUANG Wan-peng QU Guang-long WANG Bo CUI Xi-hai FAN Qing-zhong School of Mechanics and Civil Engineering China University of Mining and Technology(Beijing)Beijing 100083China College of Mining and Safety Engineering Shandong University of Science and TechnologyQingdao 266590China State Key Laboratory of Mining Disaster Prevention and Control(Shandong University of Science and Technology) Qingdao 266590China North China Institute of Science and Technology Langfang 065201China College of Water Conservancy and Civil Engineering Shandong Agricultural UniversityTaian 261000China

Soft and medium-hard rocks are subjected to high rheology under high stress,and they are prone to a relatively large-degree of deformation when perturbed by external impacting *** phenomenon where rock deformation is developed due to external impacting perturbation in the rheological state is defined as the rock rheological perturbation *** work presents a new experimental system for investigating the rock rheological perturbation effect with experiments on medium-hard red *** from our analysis show that red sandstone changes under two mechanical mechanisms:deformation-hardening effects at low stress states,and damage-fracture effects at high stress states when impacted by certain external impacting *** sandstone tested in our experiments has a strain threshold of about 90% of the ultimate strain under the perturbation effect;the red sandstone is sensitive to a perturbed load when its actual strain exceeds the *** perturbed deformation process of the rock can be divided into three phases:decline,approximately constant speed and *** rock will be rapidly destroyed when the perturbed deformation accumulates to a certain *** perturbation effect of rock deformation under uniaxial compression is more obvious than that under axial *** on our experiment,a constitutive relation of the rock rheological perturbation effect is developed.

关键词： rock rheology perturbation effect experimental system strain threshold

Discovery of novel inhibitors of anti-apoptotic Bcl-2 proteins derived from Bim BH3 domain

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Chinese Chemical Letters 2017年第7期28卷 1523-1527页

作者： Chuan-Liang Zhang Shan Liu Xiao-Chun Liu Jiang-Ming Gao Shu-Lin Wang School of Medicine and Pharmacy Key Laboratory of Marine DrugsMinistry of EducationOcean University of ChinaQingdao 266003China Marine Biomedical research Institute Qingdao 266071China

The BH3 mimetics targeting the interaction between the BH3-only proteins and their prosurvival Bcl-2family proteins have shown enormous potential as cancer therapeutics. Herein, seven analogues targeting anti-apoptotic Bcl-2 proteins derived from the Bim BH3 domain via sequence simplification and/or modification are described. The in vitro binding affinity on anti-apoptotic Bcl-2 proteins and cell killing activity were evaluated. The results showed that analogues could significantly bind to target proteins and exhibited anti-cancer effect against three cancer cell lines. Of particular interest were the analogue SM-5（KD= 9.48 nmol/L for Bcl-2） and SM-6（KD= 0.08 nmol/L for Bcl-xL）, which exhibited improved binding affinity compared with the lead Bim（KD= 16.90 nmol/L for Bcl-2 and 22.2 nmol/L for Bcl-xL, respectively）. These results indicated that the peptide sequence containing the four hydrophobic side chains occupying pockets within the BH3-recognition cleft of anti-apoptotic Bcl-2 proteins might be the minimum sequence required for the bioactivity and the active core region of Bim. Promising inhibitors of anti-apoptotic Bcl-2 proteins with high bioactivity might be designed based on the active core.

关键词： Apoptosis Anti-apoptotic Bcl-2 proteins Bim BH3 domain Binding affinity Anti-cancer activity

Investigation on the Cavitation Effect of Underwater Shock near Different Boundaries

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China Ocean Engineering 2017年第4期31卷 396-407页

作者： XIAO Wei WEI Hai-peng FENG Liang College of Engineering Ocean University of China Qingdao 266100 China Beijing Institute of Astronautica System Engineering Beijing 100076 China

When the shock wave of underwater explosion propagates to the surfaces of different boundaries, it gets reflected. Then, a negative pressure area is formed by the superposition of the incident wave and reflected wave. Cavitation occurs when the value of the negative pressure falls below the vapor pressure of water. An improved numerical model based on the spectral element method is applied to investigate the cavitation effect of underwater shock near different boundaries, mainly including the feature of cavitation effect near different boundaries and the influence of different parameters on cavitation effect. In the implementation of the improved numerical model, the bilinear equation of state is used to deal with the fluid field subjected to cavitation, and the field separation technique is employed to avoid the distortion of incident wave propagating through the mesh and the second-order doubly asymptotic approximation is applied to simulate the non-reflecting boundary. The main results are as follows. As the peak pressure and decay constant of shock wave increases, the range of cavitation domain increases, and the duration of cavitation increases. As the depth of water increases, the influence of cavitation on the dynamic response of spherical shell decreases.

关键词： underwater explosion cavitation fluid structure interaction spectral element boundary