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Particuology 2024年第7期90卷 404-411页

作者： Hanqiao Che Yuanhe Yue zhaohua jiang Duan Li School of Mechanical Engineering Guangxi UniversityNanningGuangxi530004China School of Chemical Engineering University of BirminghamBirminghamB152TTUK Hebei Engineering Research Center of Advanced Energy Storage Technology and Equipment School of Energy and Environmental EngineeringHebei University of TechnologyTianjin300401China Hebei Key Laboratory of Thermal Science and Energy Clean Utilization School of Energy and Environmental EngineeringHebei University of TechnologyTianjin300401China School of Mechatronics and Vehicle Engineering Chongqing Jiaotong UniversityChongqing400074China School of Instrumentation and Opto-Electronic Engineering Beihang UniversityBeijing 100191China

The transient heat transfer behaviours in a packed bed have been studied using coupled computational fluid dynamics(CFD)and discrete element method(DEM).Intra-particle thermal diffusion,which is a crucial but rarely explored issue,is considered by introducing a one-dimensional diffusion equation in the DEM *** achieve a sufficiently long physical time of simulations,we further reduce the computational cost by applying periodic boundary condition to a small segment of the packed *** study demonstrates a shifting peak heat flow rate from the bottom to the top of the packed bed during the initial warming *** affirm that the influence of thermal diffusion within a particle is noteworthy only for particles exhibiting a high Biot number(e.g.,Bi=1.2).This insight enriches our understanding of heat transfer mechanisms in packed beds and their practical engineering applications.

关键词： Packed bed Intra-particle heat transfer CFD–DEM

Vascularized lymph node transfer using axilla as recipient site restores lymphatic flow in upper limb lymphedema: Evidence from magnetic resonance lymphangiography

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Chinese Journal of Plastic and Reconstructive Surgery 2024年第1期6卷 1-7页

作者： zhaohua jiang Ziyou Yu Shengli Li Department of Plastic and Reconstructive Surgery Shanghai Ninth People's Hospital Shanghai Jiao Tong University

Background: Lymphedema is a debilitating condition that frequently occurs after breast cancer treatment. Vascularized lymph node transfer(VLNT) is a promising approach to reduce lymphedema. This study used magnetic resonance lymphangiography(MRL) to assess lymphatic reconnections post-VLNT in patients with breast cancerrelated lymphedema(BCRL).Methods: The clinical records of six female patients with unilateral upper limb BCRL who underwent VLNT(4cases) or VLNT combined with breast reconstruction(2 cases) were retrospectively reviewed. All patients were examined using MRL preoperatively and at the 1-year follow-up. The morphological characteristics of the lymphatic network, dermal backflow patterns, and architecture of the lymph nodes were evaluated. Clinical outcomes, patient satisfaction, and complications were ***: At the 1-year follow-up, reduction in tissue edema and limb circumference was achieved in all six *** MRL, the implanted lymph nodes in the axillary region of the affected upper arm were enhanced and visualized in all six patients. Reconnected lymphatic vessels in the subcutaneous tissue associated with the implanted lymph nodes were observed in four patients. Decreased dermal backflow and lymphatic vessel dilation of the affected limbs were observed in all six patients. No disruption of the lymph flow in the donor area was ***: This is the first study to provide direct imaging evidence for the reconnection of afferent lymphatic channels between implanted lymph nodes and the recipient lymphatic system in patients with BCRL. Overall, our study demonstrates the mechanism and efficacy of VLNT in reducing lymphedema.

关键词： Magnetic resonance lymphangiography Vascularized lymph node transfer Breast cancer Lymphedema

等离子体电解氧化法制备多孔TiO_(2)/V_(2)O_(5)复合物膜层及其增强光催化产氢活性

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材料科学与工艺 2024年第2期32卷 12-19页

作者：贾方舟姚忠平姜兆华首都航天机械有限公司北京100076 哈尔滨工业大学化工与化学学院哈尔滨150001

较差的光催化产氢效率极大地阻碍了TiO_(2)光催化剂的工业化应用。为此,本文在含有NH_(4)VO_(3)的磷酸盐溶液中,采用等离子体电解氧化(PEO)法制备了多孔TiO_(2)/V_(2)O_(5)复合膜光催化剂,通过扫描电子显微镜(SEM)、能谱仪(EDS)、X射线... 详细信息

较差的光催化产氢效率极大地阻碍了TiO_(2)光催化剂的工业化应用。为此,本文在含有NH_(4)VO_(3)的磷酸盐溶液中,采用等离子体电解氧化(PEO)法制备了多孔TiO_(2)/V_(2)O_(5)复合膜光催化剂,通过扫描电子显微镜(SEM)、能谱仪(EDS)、X射线衍射(XRD)、X射线光电子谱(XPS)和紫外可见漫反射光谱(UV-Vis DRS)对其组成、结构及光吸收性质进行了表征,并采用气相色谱评价了薄膜催化剂的光催化产氢性能,研究了电解液中NH_(4)VO_(3)含量对膜的结构、组成和光催化产氢性能的影响。结果表明:复合膜催化剂主要由锐钛矿和金红石型TiO_(2)组成,具有微孔结构,V_(2)O_(5)主要以无定形形式存在于膜中,与TiO_(2)有很强的相互作用,影响TiO_(2)的晶面间距。研究发现,元素V抑制了TiO_(2)的结晶和金红石型TiO_(2)的形成,扩大了薄膜的光学吸收范围。针对Na_(2)S+Na_(2)SO_(3)溶液中的光催化产氢性能的研究显示,在质量浓度为1 g/L NH_(4)VO_(3)的电解液中制备的TiO_(2)/V_(2)O_(5)薄膜的光催化活性最高,优于近年来报道的其他光催化剂。光催化重复实验表明,该复合膜催化剂具有较高的稳定性和较为恒定的光催化活性。

关键词： TiO_(2) V_(2)O_(5) 膜层光催化剂等离子体电解氧化产氢

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Metal-organic framework-derived Ni doped Co_(3)S_(4) hierarchical nanosheets as a monolithic electrocatalyst for highly efficient hydrogen evolution reaction in alkaline solution

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Chinese Journal of Chemical Engineering 2022年第2期35卷 380-388页

作者： Jiankang Wang Yajing Wang Zhongping Yao zhaohua jiang School of Chemistry and Chemical Engineering State Key Laboratory of Urban Water Resource and EnvironmentHarbin Institute of TechnologyHarbin 150001China College of Materials Science and Engineering Yangtze Normal UniversityChongqing 408100China

Hierarchical nanostructure construction and electronic structure engineering are commonly employed to increase the electrocatalytic activity of HER ***,Ni doped Co_(3)S_(4) hierarchical nanosheets on Ti mesh(Ni doped Co_(3)S_(4) HNS/TM)were successfully prepared by using metal organic framework(MOF)as precursor which was synthesized under ambient *** results confirmed this structure and Ni incorporation into Co_(3)S_(4) lattice as well as the modified electronic structure of Co_(3)S_(4) by Ni *** HER performance showed that Ni doped Co_(3)S_(4) HNS/TM presented outstanding HER activity with 173 m V overpotential at-10 m A·cm^(-2),surpassing most of metal sulfide-based *** hierarchical structure,superior electrical conductivity and electronic structure modulation contributed to the accelerated water dissociation and enhanced intrinsic *** work provides a new avenue for synthesizing hierarchical nanostructure and simultaneously tuning the electronic structure to promote HER performance,which has potential application in designing highly efficient and cost-effective HER nanostructured electrocatalyst.

关键词： Metal-organic framework Electronic structure Ni doped Co_(3)S_(4) Electrochemistry Catalysis Hydrogen production

A mechanically durable,excellent recyclable 3D hierarchical Ni_(3)S_(2)@Ni foam photothermal membrane

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Green Energy & Environment 2022年第3期7卷 492-499页

作者： Zhongping Yao Kailun Yu Mengyao Pan Hongbo Xu Tianqi Zhao zhaohua jiang School of Chemistry and Chemical Engineering State Key Laboratory of Urban Water Resource and EnvironmentHarbin Institute of TechnologyHarbin150001China

Solar-driven water evaporation is considered to be a viable and very efficient technology for fresh water ***,the photothermal membrane has a low absorptivity,low photothermal conversion and poor recyclability,which are difficult to meet the demands of self-floating solar driven evaporators in practical ***,a hierarchical nanostructure Ni_(3)S_(2) has been prepared by in-situ growing method on Ni foam(NF),which shows excellent absorptivity,outstanding recyclable and high mechanically durable *** photothermal membrane was composed of hierarchical nanostructure Ni_(3)S_(2)@NF,which exhibited excellent solar absorption(93.13%) in the wavelength range of 250–2500 nm and sustained anti-corrosion capacity for one *** addition,the hierarchical nanostructure Ni_(3)S_(2)@NF has good hydrophilicity and strong binding force,indicating this photothermal membrane exhibits good stability and outstanding photothermal conversion *** evaporation system based on 3D Ni_(3)S_(2)@NF membrane exhibited excellent water evaporation ability,the highest water evaporation rate(1.53 kg m^(-2)h^(-1)) and the photothermal conversion efficiency(84.7%) under 1 sun *** the desalination experiment,the water evaporation rate and photothermal conversion efficiency almost keep constant over 5 cycles tests and do not decrease compared with the experiment in pure *** result demonstrated that the Ni_(3)S_(2)@NF membrane has shown good corrosion resistance and outstanding *** to the simple preparation method,low cost,outstanding recyclability and high mechanical durability in the sea water,this Ni_(3)S_(2)@NF membrane have great potential for long-term solar distillation applications.

关键词： corrosion durability illumination

Preparation and structure of microarc oxidation ceramic coatings containing ZrO2 grown on LY12 Al alloy

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Rare Metals 2008年第1期27卷 55-58页

作者： WU Zhendong YAO Zhongping jiang zhaohua Department of Applied Chemistry Harbin Instinute of Technology Harbin 150001 China Department of Applied Chemistry Baicheng Normal College Baicheng 137000 China

Ceramic coatings containing ZrO2 were prepared in situ on LY12 aluminum alloy by microarc oxidation（MAO） in the mixed solution of zirconate and phosphate *** phase composition and morphology of the coatings were studied by XRD and SEM,*** growing mechanism of ceramic coatings was discussed in a preliminary *** results show that with an increase in MAO time,the compactness of the coating improved and the thickness *** the inner layer to the coating surface,the content of Zr increased,while the content of Al *** addition,the coating was composed of m-ZrO2,t-ZrO2,and a little amount of γ-*** an increase in reaction time,the relative content of t-ZrO2 within the coating sharply decreased while the relative content of m-ZrO2 sharply increased,and then both generally kept at a constant level after 60 min.

关键词： microarc oxidation aluminium alloy ceramic coating zirconium dioxide

Preparation of micro-arc oxidation coatings on magnesium alloy and its thermal shock resistance property

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Rare Metals 2006年第3期25卷 270-273页

作者： jiang zhaohua ZENG Xiaobin YAO Zhongping Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China

In the NaAlO2-Na2SiO3 compound system, the ceramic coatings were prepared on magnesium alloy by micro-arc oxidation. The morphology, phase composition, and thermal shock resistance of the ceramic coatings were studied by scanning electron microscope, X-ray diffraction and thermal shock tests, respectively. The results showed that the ceramic coating contains MgO, MgAl2O4, as well as a little amount of MgESiO4. The thickness of the ceramic coatings increases with the current density increasing, when the current density is 12 A·dm^-2, the thermal shock resistance of the produced ceramic coating is the best. The hardness of the ceramic coating is up to 10 GPa or so.

关键词： micro-arc oxidation ceramic coatings thermal shock resistance magnesium alloy

Fast self-assembled microfibrillated cellulose@MXene film with high-performance energy storage and superior mechanical strength

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Chinese Chemical Letters 2021年第11期32卷 3575-3578页

作者： Zhirong Zhang Zhongping Yao zhaohua jiang School of Chemistry and Chemical Engineering State Key Laboratory of Urban Water Resource and EnvironmentHarbin Institute of TechnologyHarbin 150001China

The trade-off between the electrochemical performance and mechanical strength is still a challenge for Ti_(3)C_(2)T_(x)free-standing ***,a facile approach was proposed to fabricate a Microfibrillated cellulose@Ti_(3)C_(2)T_(x)(MFC@Ti_(3)C_(2)T_(x))self-assembled microgel film by means of hydrogen bonding *** from the rich hydroxyl groups on the MFC,the Ti_(3)C_(2)T_(x)nanosheets coated on the MFC in a time scale of minutes(within 1 min)instead of *** ultralong 1D frame of MFC effectively mitigated the re-aggregation of Ti_(3)C_(2)T_(x)*** fluffy MFC@Ti_(3)C_(2)T_(x)film structure and the constructed 1D/2D conducting Ti_(3)C_(2)T_(x)pathways in horizontal and vertical directions endowed the fast ion transport of the electrolytes and the improved accessibility to the Ti_(3)C_(2)T_(x)*** a result,the freestanding MFC@Ti_(3)C_(2)T_(x)microgel film delivered a high specific capacitance of 451F/*** the rate performance was increased to 71%from the 64%of that of pristine Ti_(3)C_(2)T_(x)***,the tensile strength of MFC@Ti_(3)C_(2)T_(x)film was also promoted to 46.3 MPa,3 folds of that of the pristine Ti_(3)C_(2)T_(x)film,due to the high strength of MFC and the hydrogen bonding effect.

关键词： MXene Microfibrillated cellulose Supercapacitor Self-assemble Microgel

Calcination/acid-activation treatment of an anodic oxidation TiO_2/Ti film catalyst

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Rare Metals 2009年第5期28卷 428-433页

作者： YAO Zhongping jiang Yanli jiang zhaohua ZHU Hongkui BAI Xuefeng School of Chemical Engineering and Technology Harbin Institute of Technology Harbin 150001 China Department of Chemistry Harbin College Harbin 150086 China Heilongjiang Institute of Petrochemistry Harbin 150040 China

The aim of this work was to investigate the effects of calcination/acid-activation on the composition, structure, and photocatalytic （PC） reduction property of an anodic oxidation TiO2/Ti film catalyst. The surface morphology and phase composition were examined by scanning electron microscopy and X-ray diffraction. The catalytic property of the film catalysts was evaluated through the removal rate of potassium chromate during the PC reduction process. The results showed that the film catalysts were composed of anatase and rutile TiO2 with a micro-porous surface structure. The calcination treatment increased the content of TiO2 in the film, changed the relative ratio of anatase and rutile TiO2, and decreased the size of the micro pores of the film catalysts. The removal rate of potassium chromate was related to the technique parameters of calcination/acid-activation treatment. When the anodic oxidation TiO2/Ti film catalyst was calcined at 873 K for 30 min and then acid-activated in the concentrated H2SO4 for 60 min, it presented the highest catalytic property, with the removal rate of potassium chromate of 96.3% during the PC reduction process under the experimental conditions.

关键词： titanium dioxide thin film catalyst calcination acid-activation photocatalytic reduction anodic oxidation

Micro-arc oxidation coatings on Mg-Li alloys

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Rare Metals 2009年第2期28卷 160-163页

作者： Xu Yongjun Li Kang Yao Zhongping jiang zhaohua Zhang Milin Harbin Inst Technol Dept Appl Chem Harbin 150001 Peoples R China Harbin Engn Univ Key Lab Minist Educ Super Light Mat & Surface Technol Harbin 150001 Peoples R China

Micro-arc oxidation (MAO) method was used for the surface modification of an Mg-5wt.%Li alloy. Ceramic coatings were in-situ fabricated on the Mg-Li alloy. The morphology feature,phase composition,and corrosion-resistance of the formed ceramic coatings were studied by SEM,XRD,and electrochemical methods,respectively. The results showed that the coatings produced in a sodium silicate solution system were composed of MgO and Mg2SiO4. The ceramic coating became thicker and the content of Mg2SiO4 phase increase...

关键词： Mg-Li alloys ceramic coatings micro-arc oxidation corrosion resistance