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Efficient and selective H_(2)O_(2)production through uranyl-assisted photocatalytic oxygen reduction reaction process in a uranium-organic framework

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Science China Chemistry 2024年第7期67卷 2274-2281页

作者： jianxin song Chao Liang Baoyu Li Xuemin Wang Min Lei Lisha Jiang Zhenyu Li Yugang Zhang Jian Xie Zuju Ma Xing Dai Yanlong Wang Shuao Wang Wei Liu School of Environmental and Materials Engineering Yantai UniversityYantai 264005China State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences(RAD-X)and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySuzhou 215123China School of Life and Environmental Sciences Shaoxing UniversityShaoxing 312000China School of Nuclear Science and Technology Xi’an Jiaotong UniversityXi’an 710049China

Harnessing solar energy by photocatalytically converting oxygen and water into high-value-added H_(2)O_(2)is a promising way of alleviating both environmental and energy *** is worth noting that suppressing detrimental side reactions,such as the generation of·O_(2)^(-),is a critical approach to enhancing H_(2)O_(2)***,a 2-fold interpenetrating 3D uranium-organic framework(YTU-W-1)was developed and introduced for photocatalytic H_(2)O_(2)*** material demonstrates a different photocatalytic mechanism when employing uranyl as an initiator,as compared with the conventional semiconductor photocatalytic pathway involving photo-generated charge *** from the strong hydrogen abstraction effect of the U≡O·and the direct one-step oxygen reduction pathway,YTU-W-1 exhibits enhanced photocatalytic performance for H_(2)O_(2)production with yield efficiency of 221μmol h^(-1)g^(-1).Furthermore,YTU-W-1 displays a high H_(2)O_(2)selectivity of 68%,confirmed by rotating ring-disk electrode(RRDE)*** were used to elucidate the critical role of uranyl in the photocatalytic oxygen reduction reaction for H_(2)O_(2)*** research introduces an innovative approach to photo-driven H_(2)O_(2)production,underscoring the potential for heterogeneous catalysts to engage in photocatalytic reactions independently of photogenerated charge carriers.

关键词： uranyl metal-organic frameworks oxygen reduction reaction photocatalytic H_(2)O_(2)synthesis

The 2^(nd)Asian Conference on Porphyrins,Phthalocyanines and Related Materials

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Chinese Chemical Letters 2024年第7期35卷 1-3页

作者： Gaojie Zhu Zhen Yang Shijun Li Weihua Zhu Rui Cao Junlong Zhang Jianzhang Zhao Jonathan L.Sessler Xunjin Zhu jianxin song Yongshu Xie Jianzhuang Jiang Key Laboratory for Advanced Materials and Institute of Fine Chemicals School of Chemistry and Molecular EngineeringEast China University of Science&TechnologyShanghai 200237China College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material Technology of Ministry of EducationHangzhou Normal UniversityHangzhou 311121China School of Chemistry and Chemical Engineering Jiangsu UniversityZhenjiang 212013China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi'an 710119China Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China State Key Laboratory of Fine Chemicals Frontier Science Center for Smart MaterialsSchool of Chemical EngineeringDalian University of TechnologyDalian 116024China Department of Chemistry The University of TexasAustinTexas 78712-1224United States Department of Chemistry and Institute of Advanced Materials Hong Kong Baptist UniversityHong Kong 999077China Key Laboratory of Chemical Biology and Traditional Chinese Medicine(Ministry of Educational of China) Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan ProvinceCollege of Chemistry and Chemical EngineeringHunan Normal UniversityChangsha 410081China Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline MaterialsDepartment of Chemistry and Chemical EngineeringSchool of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijing 100083China

In the past decades,porphyrins,phthalocyanines and related materials have attracted significant attention due to their diverse and brilliant structures[1,2],as well as their unique electronic structures and photophysi... 详细信息

关键词： cyanine phthalocyanine Porphyrin

650℃时效SP2215奥氏体耐热钢管的微观组织和力学性能

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稀有金属材料与工程 2024年第2期53卷 501-508页

作者：靳晓坤张世超杜晋峰梁军宋建新张峥国家能源集团新能源技术研究院有限公司北京102209 北京航空航天大学北京100191 江苏武进不锈钢股份有限公司江苏常州213111

通过OM、SEM、TEM和显微硬度、室温冲击以及高温拉伸试验,研究了650℃时效不同时间后SP2215奥氏体耐热钢管的微观组织、力学性能及断裂机理。结果表明,固溶态SP2215钢微观组织由奥氏体,少量孪晶及未溶Nb N和Z相组成;650℃时效时Cr23C6... 详细信息

通过OM、SEM、TEM和显微硬度、室温冲击以及高温拉伸试验,研究了650℃时效不同时间后SP2215奥氏体耐热钢管的微观组织、力学性能及断裂机理。结果表明,固溶态SP2215钢微观组织由奥氏体,少量孪晶及未溶Nb N和Z相组成;650℃时效时Cr23C6优先在奥氏体晶界析出,且随时效时间延长逐渐增多、粗化并形成连续网状;球形富Cu相在奥氏体晶内析出且尺寸稳定,时效2012 h约为15 nm;SP2215钢晶内室温显微硬度在时效50 h时基本达到最大值,之后趋于稳定,这与稳定富Cu相的析出强化作用有关;SP2215钢具有明显的高温时效脆化倾向,时效2012 h室温冲击吸收功较固溶态降低约78.5%,室温冲击断裂随时效时间延长由韧性断裂向沿晶脆性断裂转变,这是由Cr23C6在奥氏体晶界析出并逐渐聚集、粗化导致的。SP2215钢在650℃,2.5×10^(-4)s^(-1)应变速率下拉伸时出现锯齿流变(Portevin-Le Chatelier, PLC)现象,锯齿类型为Type (A+B),随时效时间延长PLC逐渐“减弱”,但锯齿类型不变;随时效时间延长SP2215钢高温拉伸屈服强度基本保持稳定,抗拉强度和断面收缩率逐渐降低,高温拉伸断裂由韧性断裂向准解理脆性断裂转变。

关键词： SP2215奥氏体耐热钢时效微观组织力学性能

Study on Performance of Wireless Multihop Networks Using MIMO MRC and MIMO MRT

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China Communications 2007年第2期4卷 64-68页

作者： Ye Xinrong song jianxin Nanjing Univ Posts & Telecommun Coll Telecommun & Informat Engn Nanjing 210003 Peoples R China

This paper presents the concepts of completely connected network,mean path length and cluster for analysis performance of wireless multihop network,where matrix are used to express topology of network and use a new algorithm to compute the number of cluster in the ***-input/multiple-output(MIMO) communication promises performance enhancement over conventional single-input/single-output(SISO) technology for the same radiated power,if leveraged in multihop network,MIMO may be able to provide significant network performance improvement in network robustness and in power consumption,this paper analyzes three types of multihop networks employing SISO, MIMO with maximum ratio combining(MRC) and MIMO with maximum ratio transmission(MRT) as link model respectively,and get that using MIMO link model can increase robust,decrease mean path length by simulation.

关键词： multiple-input/multiple-output(MIMO) wireless multihop network maximum ratio combining(MRC) maximum ratio transmission(MRT) single-input/single-output(SISO)

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基于数字孪生的铣削加工智能监控平台

航空制造技术 2024年第11期67卷 56-66页

作者：童寿维黄树海舒倩宋剑鑫金鸿宇卓越西南技术工程研究所重庆400039 哈尔滨工业大学机器人系统与技术国家重点实验室哈尔滨150001

数字孪生与制造领域的结合日益密切,数字孪生可以帮助机床在智能制造环境下实现自主监控、评估和推理,显著提升智能化水平。本文开发面向机床铣削加工过程的数字孪生智能监控平台,可实现物理制造过程和虚拟数据模型之间的实时交互。为... 详细信息

数字孪生与制造领域的结合日益密切,数字孪生可以帮助机床在智能制造环境下实现自主监控、评估和推理,显著提升智能化水平。本文开发面向机床铣削加工过程的数字孪生智能监控平台,可实现物理制造过程和虚拟数据模型之间的实时交互。为了实现不同模块之间、物理机器与虚拟模型之间的双向连接,基于硬件抽象层开发思想,构建了数据采集模块与数字孪生监控平台,并与开放式数控系统集成。该数字孪生监控平台拥有松耦合、模块化和易于扩展的特性,其中集成了由动力学分析模型和人工智能算法等构建的数据分析孪生模型,可以实现铣削颤振辨识与抑制、表面形貌预测等功能。经过加工试验验证,该监控平台在实际制造环境中的性能良好。

关键词：智能制造数字孪生智能人机界面铣削加工颤振监测

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掺废弃陶瓷纤维增强水泥基复合材料抗冻性能

铁道建筑 2024年第2期64卷 124-128页

作者：吴立朋宋建新冯宇通星晨石家庄铁道大学道路与铁道工程安全保障省部共建教育部重点实验室石家庄050043 石家庄铁道大学土木工程学院石家庄050043

采用陶瓷粉替代一部分水泥,陶瓷砂替代普通河砂,在水泥基材料中掺入不同体积掺量的聚乙烯醇(Polyvinyl Alcohol,PVA)纤维,制成掺入PVA纤维和陶瓷粉的水泥基复合材料砂浆试件。通过冻融循环试验分析质量损失率、相对动弹性模量的变化,并... 详细信息

采用陶瓷粉替代一部分水泥,陶瓷砂替代普通河砂,在水泥基材料中掺入不同体积掺量的聚乙烯醇(Polyvinyl Alcohol,PVA)纤维,制成掺入PVA纤维和陶瓷粉的水泥基复合材料砂浆试件。通过冻融循环试验分析质量损失率、相对动弹性模量的变化,并通过电化学阻抗测试和扫描电子显微镜观察研究砂浆试件的冻融损伤规律。结果表明:陶瓷粉中SiO_(2)和Al_(2)O_(3)含量远大于水泥中相应含量,且粒径小于20μm的颗粒占82.3%,火山灰效应和微集料效应可改善试件的密实度,提升复合材料的抗冻性能;PVA纤维掺量为2.2%,陶瓷粉掺量为30%,冻融循环100次时砂浆试件质量损失率最小,相对动弹性模量最大,连续导电路径电阻最大,冻融损伤程度最小;纤维和基体的接触面是该复合材料抗冻薄弱部位。

关键词：工程材料冻融损伤试验研究纤维增强水泥基材料废弃陶瓷耐久性

长江黄河源区水土资源生态承载力耦合协调度分析

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测绘科学 2024年第6期49卷 188-202页

作者：龙明伟赵娜娜赵财胜宋建新孙文洁中国矿业大学(北京) 北京100083 自然资源部国土整治中心(自然资源部土地科技创新中心) 北京100035 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室北京100038 自然资源部土地整治重点实验室北京100035

针对长江黄河源区水土资源发展和可持续利用问题,该文基于水土资源生态足迹模型和耦合协调度模型,分析了长江黄河源区2010—2021年水土资源的匹配状况,评估了水土资源可持续发展状态及水土资源承载力耦合协调状态。结果表明:2010—2021... 详细信息

针对长江黄河源区水土资源发展和可持续利用问题,该文基于水土资源生态足迹模型和耦合协调度模型,分析了长江黄河源区2010—2021年水土资源的匹配状况,评估了水土资源可持续发展状态及水土资源承载力耦合协调状态。结果表明:2010—2021年研究区的水土资源匹配状态极差,基尼系数虽然逐渐减小,但仍未达到理想状态;水资源处于可持续发展的状态,生态足迹呈现下降趋势,承载力呈上升趋势;土地资源则处于不可持续发展状态,生态足迹和承载力均呈现下降趋势;水土资源耦合协调状态极差,由于土地资源承载力发展滞后水土资源承载力发展处于失调状态。总体上,长江黄河源区的水土资源状态较差,可持续利用形势严峻,提高源区水土资源的生态承载力,实现水土资源可持续发展,对维护水安全、生态安全至关重要。

关键词：水土资源匹配水资源土地资源基尼系数生态足迹耦合协调度

Synthetic porphyrin chemistry in China

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Science China Chemistry 2018年第5期61卷 511-514页

作者： Chengjie Li Junlong Zhang jianxin song Yongshu Xie Jianzhuang Jiang Key Laboratory for Advanced Materials and Institute of Fine Chemicals Shanghai Key Laboratory of Functional Materials Chemistry School of Chemistry & Molecular Engineering East China University of Science & Technology Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and Applications College of Chemistry and Molecular Engineering Peking University Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) Key Laboratory of Application and Assemble of Organic Functional Molecules Hunan Normal University Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials Department of Chemistry University of Science and Technology Beijing

Porphyrins are a class of heterocyclic macrocycles,containing four pyrrolic subunits interconnected at theα-positions with four methine（=CH-）groups.

关键词： In Figure Synthetic porphyrin chemistry in China NIR OC DDQ

Mg-induced g-C_(3)N_(4) synthesis of nitrogen-doped graphitic carbon for effective activation of peroxymonosulfate to degrade organic contaminants

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Chinese Chemical Letters 2022年第6期33卷 3113-3118页

作者： Jihong Xu jianxin song Yulin Min Qunjie Xu Penghui Shi Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power Shanghai University of Electric PowerShanghai 200090China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200090China

The nitrogen-doped carbon derived from graphitic carbon nitride(g-C_(3)N_(4))has been widely deployed in activating peroxymonosulfate(PMS)to remove organic ***,the instability of g-C_(3)N_(4)at high temperature brings challenges to the preparation of *** nitrogen-doped graphitic carbon nanosheets(N-GC750)were synthesized by magnesium thermal *** undergoes the displacement reaction with small molecules produced by the pyrolysis of g-C_(3)N_(4),thereby effectively fixing carbon on the in-situ template of Mg_(3)N_(2)and avoiding direct product volatilization.N-GC750 exhibited excellent performance during the PMS activation process and bisphenol A(BPA,0.2 g/L)could be thoroughly removed in 30 min.A wide range of pH(3–11),temperature(10–40℃)and common anions were employed in studying the impact on ***,N-GC750 showed satisfactory reusability in cycle tests and promising applicability in real water *** experiments and electron paramagnetic resonance(EPR)measurements indicated that singlet oxygen was the main active species coupled with partial electron transfer in N-GC750/PMS ***,the oxidation products were identified,and their ecotoxicity was *** work is expected to provide a reference for the feasibility of preparing g-C_(3)N_(4)derived carbon materials and meaningful for PMS activation.

关键词： Mg-induced Graphene PMS activation Nonradical process Bisphenol A Toxicity