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Investigation on structural optimization of rotational hydrodynamic cavitation reactor with a tapered rotor for organic dyes degradation

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Chemical Engineering Research and Design 2025年 218卷 653-663页

作者： Liu, Huiyang Zhao, Jiejun Yu, Jianfeng School of Mechanical Engineering Jiangnan University Jiangsu Wuxi China Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment & Technology Jiangsu Wuxi China Textile Industrial Products Testing Center of Nanjing Customs District Jiangsu Wuxi China

Rotational hydrodynamic cavitation reactor (RHCR) has been demonstrated to offer significant advantages in wastewater treatment. The structure of RHCR requires further optimization to improve its effectiveness in organic pollutant degradation. A new RHCR with a tapered rotor and internal passages (RHCR-T) was designed. Cavitation in RHCR-T was generated by pressure changes and shear effects caused by the tapered rotor. The effects of structure parameters of RHCR-T on degradation performance were investigated by ozonation degradation experiments. With degradation rate and energy utilization efficiency as evaluation indicators, five structural parameters including axial indentation number, stator-rotor interaction distance, inclination angle of cavitation generation units, internal passage number, and internal passage diameter were studied. A degradation rate of 84.3 % for simulated dye wastewater was achieved within 18 minutes, with a pseudo first-order reaction rate constant of 0.099 min−1, and an electric energy per order of 120.7 kWh/order/m3. The energy consumption of RHCR-T is 68 % lower than that of the reported system combining hydrodynamic cavitation and ozonation, with the operating cost decreased by 14 %. The findings of this work demonstrate practicality and economics of the RHCR in the field of wastewater treatment. © 2025 Institution of Chemical Engineers

关键词： Ozonization

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Temperature dependence in tensile properties and deformation behavior of GH4169 alloy

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Journal of Iron and Steel Research International 2023年第12期30卷 2566-2581页

作者： Qi Zheng Tian Liu Jia-bo Wei Rui Luo Yi-ming Zhou Heng-nan Ding Le-li Chen Di Zhang Xiao-nong Cheng School of Materials Science and Engineering Jiangsu UniversityZhenjiang212013JiangsuChina Yangtze Delta Region Institute of Advanced Materials Suzhou215100JiangsuChina State Key Laboratory of Advanced Metals and Materials University of Science and Technology BeijingBeijing100083China

The effect of temperature on the tensile properties and deformation mechanism of GH4169 alloy has been systematically studied over a wide range of room temperature(RT)to 1000℃.The results indicate that the stress–strain curve of the alloy shows serrations at 200–600℃,and the character of the serrations changes from type A to type B and then to type C at different *** ultimate tensile strength of the alloy decreases gradually from RT to 600℃.The yield strength decreases slowly from RT to 700℃ but decreases rapidly above 800℃.Transmission electron microscopy analysis relieves that the primary deformation mechanism of the alloy below 500℃ is Orowan bypass *** temperatures between 600 and 700℃,the coordinated deformation of twins and cross-slip of dislocations are *** transformation of\upgamma^{\prime\prime}phase toδphase above 650℃ will decrease the *** primary deformation mechanism above 800℃ transforms into the repeated shearing of\upgamma^{\prime\prime}by dislocations to form multiple stacking *** grains were observed above 800℃,and continuous dynamic recrystallization and discontinuous dynamic recrystallization were *** stress concentration caused by Nb-rich carbides is the cause of intracrystalline crack *** 700℃,grain boundary crack sprouting is caused by the combined effect of slip band impact on grain boundaries and grain boundary dislocation *** relationship between the serrated flow behavior and the deformation mechanism has been discussed based on the experimental results.

关键词： GH4169 alloy Tensile property Deformation mechanism Serrated flow

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Facile construction of Mxene-supported niobium hydride nanoparticles toward reversible hydrogen storage in magnesium borohydride

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Rare Metals 2024年第9期43卷 4387-4400页

作者： Ao Xia Jia-Guang Zheng Qing-Bo Zhang Yu-Gang Shu Cheng-Guo Yan Liu-Ting Zhang Zhan-Liang Tao Li-Xin Chen School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China State Key Laboratory of Silicon and Advanced Semiconductor Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China

The facile construction of nanoscale NbH_(x)supported by Ti_(3)C_(2)(NbH_(x)@Ti_(3)C_(2))was achieved using facile ball milling strategy to improve the hydrogen desorption kinetics and reversibility of magnesium borohydride(Mg(BH_(4))_(2)).The doping of 30 wt%NbH_(x)@Ti_(3)C_(2)catalyst reduced the onset dehydrogenation temperature of Mg(BH_(4))_(2)to 71.2℃.Additionally,the Mg(BH_(4))_(2)+30NbH_(x)@Ti_(3)C_(2)composite achieved remarkable hydrogen release of over 9.2 wt%at a temperature as low as 230℃,indicating unexpected dehydrogenation ***,the reversibility of NbH_(x)@Ti_(3)C_(2)doped Mg(BH_(4))_(2)was retained to more than 4.2 wt%after four cycles,which was increased by 68%compared to that of undoped Mg(BH_(4))_(2).The strong catalysis of NbH_(x)@Ti_(3)C_(2)catalyst could be attributed to the synergistic effect of NbH_(x)and Ti_(3)C_(2)in hydrogen spillover and ***_(x)acted as a"hydrogen pump"for effective hydrogen spillover,while Ti_(3)C_(2)created numerous diffusion channels for hydrogen dissolution and provided the active catalytic site to facilitate the re/dehydrogenation of Mg(BH_(4))_(2).

关键词： Hydrogen storage Magnesium borohydride Catalysts Mxene

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Multifunctional dual-anion compensation of amphoteric glycine hydrochloride enabled highly stable perovskite solar cells with prolonged carrier lifetime

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Nano Research 2024年第6期17卷 5131-5137页

作者： Lina Qin Mengfei Zhu Yuren Xia Xingkai Ma Daocheng Hong Yuxi Tian Zuoxiu Tie Zhong Jin State Key Laboratory of Coordination Chemistry MOE Key Laboratory of Mesoscopic ChemistryMOE Key Laboratory of High Performance Polymer Materials and TechnologyJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Nanjing Tieming Energy Technology Co.Ltd. Nanjing 210093China Suzhou Tierui New Energy Technology Co.Ltd. Suzhou 215228China

Throughout years,the two-step spin-coating process is the most common method to prepare organic lead halide perovskite ***,the short reaction time of dropping the solution at the second step means that PbI2 cannot be completely transformed into perovskite *** solve this problem,we report the introduction of glycine hydrochloride(GlyHCl)into the second step of the two-step spin-coating process to prepare a FA_(0.9)MA_(0.1)PbI_(3-x)%-GlyHCl perovskite material(namely FAMA-x%-GlyHCl,where FA=formamidinium,MA=methylammonium,and x%stands for the molar ratio of GlyHCl added in FA iodide/MA iodide(FAI/MAI)precursor solution).The Cl−ion in GlyHCl assists the formation ofα-phase perovskite,and the-COO−group coordinates with Pb2+cation in a bridging way,making up for the anion vacancy in perovskite lattice and resulting in high absorption *** perovskite solar cells(PSCs)based on FAMA-9%-GlyHCl achieve a long carrier lifetime(527.0 ns),a photoelectric conversion efficiency(PCE)of 19.40%and good thermal stability,maintaining 85.8%of the initial PCE after being continuously heated at 60℃for 500 *** study helps to solve the problem of incomplete reaction in the two-step spin-coating process and puts forward a new solution for preparing high coverage perovskite films with large grain size.

关键词： dual-anion compensation glycine hydrochloride perovskite solar cells carrier lifetime thermal and moisture stability

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Microstructure evolution of extruded Mg-RE-Ag alloy during short-time heat treatment

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Journal of Rare Earths 2024年第12期42卷 2350-2361,I0006页

作者： Zehua Li Jinghuai Zhang Shujuan Liu Jiaming Hao Liyuan Liu Yuying He Haodong Zhang Xingkai Jiao Xiaobo Zhang Ruizhi Wu Key Laboratory of Superlight Material and Surface Technology Ministry of EducationCollege of Material Science and Chemical EngineeringHarbin Engineering UniversityHarbin150001China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin150001China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing Institute of TechnologyNanjing211167China

Microstructure regulation via short-time heat treatment is conducive to the optimization in the microstructure and properties of precipitable magnesium(Mg)alloys,but there is currently a lack of relevant *** this work,the microstructure evolution of a Mg-RE-Ag alloy during different short-time heat treatments was characterized and *** results show that extreme short-time heat treatment(ESHT,e.g.,2 min)at 450-480℃can greatly increase solute concentration in Mg matrix through the rapid re-dissolution of the second-phase and simultaneously maintain fine grains,while the ESHT at a too high temperature(e.g.,510℃)is not suitable due to excessive grain growth and coarse second phase regenerated at grain *** is found that 480℃is the approximate critical temperature for appropriate ESHT,and further prolongation of the time will lead to excessive grain *** is suggested that in addition to grain boundary migration,grain rotation is activated,resulting in the annihilation of high-angle grain boundaries with relatively low misorientation,as well as the reduction in the ability of the residual second phase to pin grain *** addition,the reasons for the abnormal grain boundary segregation and grain boundary continuous phase were analyzed from the perspective of interfacial *** study provides a basis for effective microstructure regulation of Mg-RE alloys.

关键词： Magnesium alloy Rare earths Microstructure Heat treatment Precipitates

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Methanolysis of ammonia borane catalyzed by NiO-CuO heterostructured nanosheets:cooperation of visible light and oxygen vacancy

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Rare Metals 2025年第1期44卷 389-403页

作者： You-Xiang Shao Yuan-Zhong Li Xue-Qi Lian Xiao-Ting Che Qian-Yi Li Yu-Fa Feng Hui-Ze Wang Jin-Yun Liao Quan-Bing Liu Hao Li School of Chemistry and Materials Engineering Huizhou UniversityHuizhou 516007China Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology Changzhou UniversityChangzhou 213164China Guangzhou Key Laboratory of Clean Transportation Energy Chemistry School of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou 510006China

Developing cost-effective and high-activity catalysts for the methanolysis of ammonia borane(AB)has attracted great attention in the field of hydrogen energy *** the modification of the electronic structure of the catalysts,external factors such as visible light irradiation can improve the efficiency of hydrogen production as *** the present study,a Z-scheme heterostructured VO-Cu_(0.5)Ni_(0.5)O catalysts were constructed by introducing a plenteous phase interface and oxygen vacancy(Vo).The catalytic activity of as-prepared VO-Cu_(0.5)Ni_(0.5)O toward AB methanolysis has been improved dramatically with the assistance of visible light *** turnover frequency(TOF)under visible light irradiation was measured to be 29_(mol)H_(2)·mol_(cat.)^(-1)·min^(-1),which is 1.4 times larger than the TOF in the absence of visible *** characterization experiments and density functional theory(DFT)calculations were conducted to unveil the causation of enhanced catalytic *** results demonstrated that the enhancement of the catalytic activity of VO-Cu_(0.5)Ni_(0.5)O originated from the electronic structure modification induced by the formation of heterojunctions,the introduction of oxygen vacancies,and the assistance of visible light *** formation of heterojunction and the introduction of oxygen vacancies provoked the upshift of the d-band center;while the visible light irradiation induced the photogenerated electrons to transfer from Cu to Ni sites at the *** electron structure modulation is beneficial for the construction of abundant active sites,thereby enhancing the adsorption of methanol on the Ni sites,which is considered as the rate-determine step for the methanolysis of *** strong interaction between Ni and O weakened the O-H bond of methanol,accelerating the methanolysis of *** results demonstrate the utilization of combined heterojunction,oxygen vacancy,and visible light to explore highly active

关键词： Ammonia borane Methanolysis Heterojunction Oxygen vacancy Density functional theory(DFT)calculation

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Enhanced charge collection of AgNWs-based top electrode to realize high-performance,all-solution processed organic solar cells

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Science China Chemistry 2024年第10期67卷 3347-3356页

作者： Juanyong Wan Yang Chen Weijie Chen Jinfeng Xia Guang Zeng Jianlei Cao Chuang Jin Yunxiu Shen Xiaoxiao Wu Haiyang Chen Junyuan Ding Xue-mei Ou Yaowen Li Yongfang Li Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductor-Optoelectronics Materials and DevicesCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow UniversitySuzhou 215123China State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Jiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Jiangsu Sidike New Materials Science and Technology Co. Ltd.Suqian 215400China

All-solution processed organic solar cells are the ultimate aim of printable photovoltaics,but their electrical losses arising from poor contact of top electrodes greatly limit efficiency *** solve the problem,a solution-processed hybrid top electrode was constructed using silver nanowires(AgNWs)as the skeleton and ZnO nanoparticles(ZnO-NPs)as the *** constructing the skeleton,a spin-rinsing treatment was first used to reduce the amount of the residual insulating polyvinylpyrrolidone wrapped around the AgNWs to promote intimate contact among the AgNWs in the ***,the ZnO-NPs matrix was deposited onto the AgNWs skeleton,bridging the AgNWs skeleton with the underlayer ZnO-NPs electron transporting layer(ETL).The underlayer ZnO-NPs ETL can also induce the growth of the ZnO-NPs matrix to minimize lattice mismatch,which creates additional transport channels from the ETL to the AgNWs skeleton for charge *** a result,the obtained electrode significantly enhances the electrical contact in the device,thus delivering record power conversion efficiencies of 16.04%and 14.54%for rigid and flexible all-solution processed OSCs,respectively.

关键词： solution-processed top electrode organic solar cells AgNWs electrical contact

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Experimental and Numerical Study on the Trailing Edge Cutback Cooling Characteristics with POD Analysis

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Journal of Thermal Science 2025年第3期34卷 834-849页

作者： LIU Jiajie WANG Pengfei WANG Pei LIU Jun DU Qiang WANG Haohan WANG Zhiguo SHEN Xin ZHU Junqiang Key Lab of Light-duty Gas-turbine Institute of Engineering TermophysicsChinese Academy of Sciences University of Chinese Academy of Sciences National Key Laboratory of Science and Technology on Advanced Light-duty Gas-turbine Research Center of Fluid Machinery Engineering and Technology Jiangsu University

This paper investigates the film cooling characteristics and flow structure of trailing edge cutback in turbine vanes,and explains the unsteady flow mixing mechanism of this cooling structure using Proper Orthogonal Decomposition（POD） *** Delayed Detached Eddy Simulation（DDES） turbulence model was used to obtain detailed information about the velocity and temperature field for the POD *** verify the accuracy of the numerical results,fast-response Pressure Sensitive Paint（PSP） and high-frequency Particle Image Velocimetry（PIV） experiments were also conducted,and the results achieved good *** the blowing ratio increases,the effectiveness η of the cutback's film cooling exhibits a "increase-decrease-increase" trend,with η reaching its minimum point at around a blowing ratio(Mslot) of *** kinds of coherent vortex structures are observed in the flow field at different blowing *** to the analysis using the POD method,the first and second order modes of a Karman-like vortex street are observed in the vicinity of the wall at various blowing *** coherent flow structure is directly related to the mixing intensity between the mainstream gas and the *** Mslot=0.75,these modes had the highest energy ratio and formed a stable dominant coherent structure in the flow *** the blowing ratio increases,the main characteristic modes in the temperature field gradually change,and the mode appears crescent-shaped when the effectiveness of film cooling is at its *** paper combines the vortex structure of the flow field to explain the flow field feature distribution at the lowest effectiveness point η and analyzes its impact on the film cooling characteristics of the protected surface.

关键词： film cooling Proper Orthogonal Decomposition (POD) shedding vortices trailing edge cutback unsteady flow mixing

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Recent Patents on Petroleum Pipe Inspection Gauge in China

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Recent Patents on Engineering 2022年第6期16卷 46-63页

作者： Chen, Zhong Qiu, Xiaoyang Yang, Lingling Wang, Yalin Jiangsu Key Laboratory of Advanced Manufacturing Technology Huaiyin Institute of Technology Jiangsu Huaian223003 China

Background: As the demand for petroleum products grows, pipes to carry these products are also required extensively. Consequently, petroleum pipe blockage has become a frequent and severe problem in China. In order to ensure trouble-free operation, it is necessary to clean and in-spect the petroleum pipe regularly. However, currently available petroleum pipe inspection gauges can block the petroleum pipe easily, and their cleaning efficiency is not as high as desired. There-fore, mechanisms to prevent pipe blockage and ensure high-efficiency cleaning are being given much importance in studies on petroleum pipe inspection gauges. Objective: The aim of the study is to review recent patents related to petroleum pipe inspection gauges in China and forecast possible designs that can mitigate present-day problems associated with petroleum pipe inspection gauges. Methods: This paper has studied and compared various representative patents relevant to the petroleum pipe inspection gauge. Results: A large number of patents filed in China related to petroleum pipe inspection gauges have been studied and the anti-blocking mechanism as well as the cleaning efficiency of the petroleum pipe inspection gauges described in those patents have been analyzed and compared. Forecasts were made regarding the possible development trajectories in the design of petroleum pipe inspection gauges. Conclusion: The problems of easy blockage and poor cleaning efficiency are yet unsolved for petroleum pipe inspection gauges. It is expected that future work will focus on the development of pigging, new materials, power sources, and intelligent control to resolve these issues. © 2022 Bentham Science Publishers.

关键词： Efficiency

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FWAF-VID: A Flapping-Wing Aggressive Flight Benchmark Dataset for Visual-Inertial Localization

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IEEE robotics and Automation Letters 2025年第6期10卷 6328-6335页

作者： Jiang, Jizhou Pan, Erzhen Xu, Wenfu Sun, Wei Ye, Jingyang Harbin Institute of Technology School of Robotics and Advanced Manufacture Shenzhen518055 China Guangdong Key Laboratory of Intelligent Morphing Mechanisms and Adaptive Robotics Shenzhen518055 China Guangdong Biomimetic Intelligent Unmanned System Engineering Technology Research Center Shenzhen518052 China

Accurate state estimation of micro aerial vehicles (MAVs) in high-speed and dynamic environments poses a significant challenge for visual-inertial odometry (VIO) algorithms. Flapping-wing aerial vehicles (FWAVs), as an emerging flight platform, have attracted significant attention for stealth capabilities and efficient flight characteristics. Despite the availability of numerous MAV visual-inertial datasets for six-degree-of-freedom (6-DoF) state estimation, these datasets are not applicable for FWAVs with pronounced vibrations and agile maneuverability. To address this gap, we propose a large-scale flapping-wing aggressive flight visual-inertial dataset FWAF-VID. It contains diverse integrations of synchronized onboard cameras and IMU sensors. A total of 28 sequences include static flapping, calibration, and real-world flights collected in outdoor and indoor environments. The 17 flight sequences feature variations in illuminations, speeds, trajectories, camera perspectives, and flight modalities. We provide precisely aligned ground truth RTK and UWB measurements for algorithm evaluation. Furthermore, a comprehensive benchmark comparison is conducted, qualitatively and quantitatively evaluating the positioning accuracy of state-of-the-art VIO algorithms. The experimental results indicate that despite the degradation in localization accuracy in high-dynamic environments, FWAF-VID can effectively support the further development of VIO algorithms for FWAVs. To the best of our knowledge, this is the first onboard benchmark dataset tailored for aggressive flight in flapping-wing airborne platforms. © 2025 IEEE.

关键词： Micro air vehicle (MAV)

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