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硼掺杂金刚石薄膜电极降解青霉素G钠废水机制

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哈尔滨工业大学学报 2020年第6期52卷 119-125页

作者：曲有鹏吕江维冯玉杰张杰城市水资源与水环境国家重点实验室(哈尔滨工业大学) 哈尔滨150090 哈尔滨工业大学生命科学与技术学院哈尔滨150080 哈尔滨商业大学药学院哈尔滨150076

针对抗生素废水中青霉素类物质难于生化降解的问题,采用直流等离子体化学气相沉积方法制备硼掺杂金刚石(boron-doped diamond, BDD)薄膜电极,以典型的青霉素G钠为目标污染物,对BDD电极降解青霉素的规律及降解历程进行研究.结果表明,不... 详细信息

针对抗生素废水中青霉素类物质难于生化降解的问题,采用直流等离子体化学气相沉积方法制备硼掺杂金刚石(boron-doped diamond, BDD)薄膜电极,以典型的青霉素G钠为目标污染物,对BDD电极降解青霉素的规律及降解历程进行研究.结果表明,不同质量浓度的青霉素G钠在电极上均能够被完全降解,发生电化学燃烧.青霉素G钠和化学需氧量(chemical oxygen demand, COD)的降解符合一级反应动力学,电流密度从10 mA/cm^2提高到20 mA/cm^2时,青霉素G钠和COD的反应速率常数分别增加了51.3%和29.1%.BDD电极上青霉素G钠的降解主要受液相传质过程控制,电流效率(current efficiency,EC)与青霉素G钠的质量浓度和电流密度有关.得到了青霉素G钠在BDD电极上的降解历程,主要的中间产物有青霉酸、异构青霉酸、青霉烯酸和青霉噻唑酸.

关键词：硼掺杂金刚石电催化电极电化学降解抗生素废水青霉素

中空有序介孔有机硅的研究进展:制备及在肿瘤治疗中的应用

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无机材料学报 2022年第11期37卷 1192-1202页

作者：张文君赵雪莹吕江维曲有鹏哈尔滨商业大学药学院哈尔滨150076 哈尔滨工业大学生命科学与技术学院哈尔滨150080

随着介孔材料和生物医学的不断发展,中空有序介孔有机硅(HPMOs)作为一种新型介孔硅材料,具有高比表面积、高载药量、良好的生物相容性、多功能的有机–无机杂化框架、较低的细胞毒性以及可生物降解等特点,受到广泛关注,以HPMOs为载体的... 详细信息

随着介孔材料和生物医学的不断发展,中空有序介孔有机硅(HPMOs)作为一种新型介孔硅材料,具有高比表面积、高载药量、良好的生物相容性、多功能的有机–无机杂化框架、较低的细胞毒性以及可生物降解等特点,受到广泛关注,以HPMOs为载体的药物递送系统得到多方持续开发,为肿瘤治疗提供了新的策略。本文综述了近年来HPMOs的合成进展,介绍了HPMOs的种类,对硬模板法、液界面组装法和界面重组与转化法进行了详细的阐述,并总结了其在肿瘤治疗中的应用进展。最后对其作为药物载体所面临的挑战及未来的发展趋势作了展望,以期为HPMOs的制备及在肿瘤治疗中的应用研究提供参考。

关键词：中空有序介孔有机硅硬模板法液界面组装法界面重组与转化法肿瘤治疗综述

硼掺杂金刚石薄膜电极上二氯酚的电化学阻抗谱研究

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高等学校化学学报 2016年第1期37卷 142-148页

作者：吕江维曲有鹏冯玉杰刘峻峰哈尔滨商业大学药学院哈尔滨150076 哈尔滨工业大学生命科学与技术学院哈尔滨150080 哈尔滨工业大学城市水资源与水环境国家重点实验室哈尔滨150090

以2,4-二氯酚(2,4-DCP)和2,6-二氯酚(2,6-DCP)为模型污染物,采用循环伏安法和电化学阻抗谱研究了硼掺杂金刚石(BDD)电极上2种氯酚的电催化氧化过程.结果表明,2,4-DCP和2,6-DCP的氧化电位分别为1.55和1.62 V.等效电路拟合结果表明,当极... 详细信息

以2,4-二氯酚(2,4-DCP)和2,6-二氯酚(2,6-DCP)为模型污染物,采用循环伏安法和电化学阻抗谱研究了硼掺杂金刚石(BDD)电极上2种氯酚的电催化氧化过程.结果表明,2,4-DCP和2,6-DCP的氧化电位分别为1.55和1.62 V.等效电路拟合结果表明,当极化电位由开路电位提高至1.5 V时,2种氯酚的电荷转移电阻均有明显下降,反应控制步骤为扩散控制步骤.与2,6-DCP相比,2,4-DCP在BDD电极上更容易发生直接电化学氧化.

关键词：硼掺杂金刚石循环伏安电化学阻抗谱二氯酚电催化

Time-Periodic Solutions to quasilinear Hyperbolic Systems on General Networks

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Chinese Annals of Mathematics,Series B 2024年第1期45卷 41-72页

作者： Peng qu School of Mathematical Sciences Fudan UniversityShanghai 200433China

For quasilinear hyperbolic systems on general networks with time-periodic boundary-interface conditions with a dissipative structure,the existence and stability of the time-periodic classical solutions are discussed.

关键词： Time-periodic solution quasilinear hyperbolic system General net-work Classical solution Asymptotic stability

Flat jet electrochemical milling of TC4 alloy with tailoring backward parallel flow

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Chinese Journal of Aeronautics 2024年第4期37卷 574-592页

作者： Huanghai KONG Ningsong qu College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China

In flat jet electrochemical milling, the electrolyte forms a backward parallel flow after impacting the workpiece, resulting in a weak current density distribution on the workpiece. Poor surface quality usually occurs on the machined titanium alloy surface because it inevitably suffers from the weak current density. In this study, a method of flat jet electrochemical milling with tailoring the backward parallel flow was proposed to eliminate the negative effects caused by the weak current density. Multiphysics simulations are carried out to comprehend the mechanism of flat jetEC milling with tailoring backward parallel flow and better construct the novel tool *** on flat jet electrochemical milling of TC4 alloy with and without tailoring backward parallel flow are conducted. The results reveal that, compared with flat jet electrochemical milling without tailoring backward parallel flow, the recommended tool reduces the surface roughness by86% to 93%, and improves the material removal rate by 93% to 163% with different feed ***, the recommended tool is more conducive to maintaining the inherent hardness of the material. Finally, a surface with low Sa of 0.37 μm is obtained.

关键词： Flat jet electrochemical milling TC4 alloy Surface roughness Micro-hardness Material removal rate

Pathways toward a pollution-free planet and challenges

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Frontiers of Environmental Science & Engineering 2024年第6期18卷 3-8页

作者： Jiuhui qu Jiaping Chen School of Environment Tsinghua UniversityBeijing 100084China College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China

The mission of“Establishment of Zero-Pollution Earth”defined by United Nations Environment Programme aims at creation of a clean,safe and prosperous home for all human *** is of rational choice from each individual to protect our environment and demonstrates our great ambition to achieve our *** key message given in this article is that,zero pollution does not mean no discharge of pollutants and instead it can be achievable through optimizing and controlling a sound balance between pollutants discharge and capacities of decontamination through treatment and natural environmental accumulation,which can be termed as“Principle of Equilibrium”between pollution and *** on this principle,we propose and illustrate several key factors and synergistic pathways toward a pollution-free planet:quantitative determination on purification and wastewater;source control through green measures;minimization of negative side-effects;precise management through digitalized systems;and keeping sound balance between pollutants and natural *** should be noted that we would face a series of difficulties and challenges in moving forward to“Zero-Pollution Earth”.We should further develop theories,principles and tools to achieve the balance between quantity of pollutants and decontamination *** should work together to break through the bottleneck limited by“Principle of equilibrium”to establish new environmental remediation systems leading to“Zero-Pollution Earth”.

关键词： Wastewater treatment Resources Recovery Greenhouse gases Energy Pollution-free

Different Types of Bone Fractures Observed by Terahertz Time-Domain Spectroscopy

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Acta Mechanica Solida Sinica 2024年第3期37卷 468-477页

作者： Minghao Zhang Xianjia Meng Zhiyong Wang Chuanyong qu Chuan qu Donghui Fu Department of Mechanics Tianjin UniversityTianjin300072China Tianjin Key Laboratory of Modern Engineering Mechanics Tianjin300072China

Microcracks are common in compact bone,but their continued propagation can lead to macroscopic *** microcracks cannot be visualized radiographically,necessitating alternative noninvasive methods to identify excessive microcracking and prevent *** this study,terahertz time-domain spectroscopy(THz-TDS)was used to examine bone interiors near cracks resulting from loading in bovine tibia *** loading configurations,such as impact,quasi-static loading,and fatigue loading,known to induce different types of micro-scale damage,were *** values of refractive index and absorption coefficient of the bone samples were then determined from the THz-TDS spectra acquired before loading and after *** study revealed that different loading configurations led to varying terahertz optical coefficients associated with various types of bone ***,the refractive index notably increased under fatigue loading but remained relatively stable during quasi-static *** absorption coefficient of bone decreased only under fatigue ***,samples were subjected to axial and radial impacts without sustaining *** indicated that in the undamaged state,the change in refractive index was smaller compared to after impact failure,while the change in absorption coefficient remained consistent after *** radial impact loading,changes in refractive index and absorption coefficient were significantly more pronounced than under axial *** to loading,the measured value of refractive index was 2.72±0.11,and the absorption coefficient was 6.33±0.09 mm^(−1)at 0.5 THz.

关键词： Terahertz time-domain spectroscopy Bone Microdamage Noninvasive method

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硼掺杂金刚石薄膜电极电催化降解双酚A

哈尔滨工业大学学报 2013年第12期45卷 32-37页

作者：吕江维冯玉杰曲有鹏刘峻峰崔福义哈尔滨工业大学城市水资源与水环境国家重点实验室哈尔滨150090 哈尔滨商业大学药学院哈尔滨150076 哈尔滨工业大学生命科学与技术学院哈尔滨150080

针对水环境中环境激素双酚A(bisphenol A,BPA)的污染,采用直流等离子体化学气相沉积方法制备了硼掺杂金刚石(boron-doped diamond,BDD)薄膜电极,利用高效液相色谱法和液相色谱质谱联用的方法,对BPA在BDD电极上的降解规律及降解历程进行... 详细信息

针对水环境中环境激素双酚A(bisphenol A,BPA)的污染,采用直流等离子体化学气相沉积方法制备了硼掺杂金刚石(boron-doped diamond,BDD)薄膜电极,利用高效液相色谱法和液相色谱质谱联用的方法,对BPA在BDD电极上的降解规律及降解历程进行研究.结果表明:不同初始质量浓度的BPA在电极上均能被完全降解,降解规律符合准一级反应动力学,初始质量浓度100和10 mg·L-1时的表观反应速率常数分别为0.494和0.700 h-1;电流密度从10 mA·cm-2提高到40 mA·cm-2时,表观反应速率常数增大50.61%,去除率提高11.26%.BPA的降解过程检测到7种中间产物,降解主要分为两个途径:一是BPA的一侧苯环先开环降解,最后完全矿化;二是BPA的两个苯环同时开环,然后逐级降解直至矿化.

关键词：硼掺杂金刚石电催化电极双酚A 电化学降解

Physiological and psychological responses to tended plant communities with varying color characteristics

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Journal of Forestry Research 2024年第1期35卷 183-201页

作者： Siyuan Zheng Yanzhen Zhou Haiyan qu School of Architecture and Urban Planning Shenyang Jianzhu UniversityShenyang 110168People’s Republic of China

Exposure to plants has been reported to promote health and reduce stress,and plant color has direct impacts on physical and mental *** used images of common types of tended plant communities in Shenyang,China,with combinations of yellow,green,and red foliage,as experimental stimuli.A total of 27 images were used as visual *** used electroencephalography to measureαwave activity(8-13 Hz)in 40 subjects while they viewed visual *** data were combined with subjective questionnaire data to analyze the relaxing effect of images of tended plant communities with different color types and proportions on *** results revealed that,although there were slight differences between the electroencephalography and psychological findings,women were significantly more relaxed than men after viewing the *** and psychological responses varied with the types and proportions of colors in the tended plant communities:those of foliage with combinations of two or three colors induced stronger responses than images with a single ***,(1)for one-color plant communities,green or yellow plant communities induced a stronger relaxation effect than red plant communities;(2)for two-color plant communities,the optimal color proportion was 55%+45%,and the green+yellow and green+red color combinations induced a stronger relaxation effect;(3)for three-color plant communities,the relaxation effect was strongest when the color proportion was 55%green+25%yellow+20%*** data would provide a plant color matching in future plant landscape design,which may be helpful for creating healthy and relaxing environments.

关键词： Plant community Color type Color ratio Electroencephalography Subjective questionnaire