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空心球状共价有机框架负载金纳米粒子用于光催化生产过氧化氢

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Chinese Journal of Catalysis 2024年第2期57卷 143-153页

作者：张勇邱俊逸朱必成孙国太程蓓王临曦湖北理工学院化学与化工学院矿区环境污染控制与修复湖北省重点实验室湖北黄石435003 武汉理工大学材料复合新技术国家重点实验室湖北武汉430070 中国地质大学材料与化学学院太阳燃料实验室湖北武汉430074

过氧化氢是一种高效的绿色氧化剂,广泛应用于纸浆漂白、外科消毒、废水处理和化学合成等领域.目前,过氧化氢的工业生产仍依赖于传统的蒽醌氧化法,该方法存在能耗高、污染大以及工艺复杂等问题.以太阳能为驱动力,水和氧气作为原料,利用... 详细信息

过氧化氢是一种高效的绿色氧化剂,广泛应用于纸浆漂白、外科消毒、废水处理和化学合成等领域.目前,过氧化氢的工业生产仍依赖于传统的蒽醌氧化法,该方法存在能耗高、污染大以及工艺复杂等问题.以太阳能为驱动力,水和氧气作为原料,利用半导体材料光催化生产过氧化氢被认为是一种清洁、安全、经济和节能的技术.该技术的关键是开发高效稳定的半导体光催化材料.共价有机框架(COF)是一种可用于光催化产过氧化氢的新型晶态多孔有机材料,具有结构可调控、密度低、比表面积大、热稳定性和化学稳定性高等优点,但其应用受到光生载流子快速复合的限制.将助催化剂金纳米粒子负载在COF表面,可以有效促进光生载流子的迁移与分离,从而获得较好的光催化产双氧水性能.然而,这方面的研究尚未受到较多的关注.本文采用NaBH_(4)还原法将金纳米粒子原位负载在一种空心球状COF(TB-COF)的表面,制得了不同Au含量的Au/TB-COF复合物(记为AT-x,其中x代表复合物中Au的质量百分含量),并系统研究了该材料光催化生产过氧化氢的性能.粉末X射线衍射(XRD)、透射电子显微镜(TEM)和傅里叶转换红外光谱(FT-IR)等表征结果证明了Au/TB-COF复合物的成功制备,且发现原位负载的金纳米粒子并没有改变TB-COF的晶型、形貌和化学结构.在光催化反应中,以乙醇作为牺牲剂时,复合物AT-1的性能最佳,表现出最高的过氧化氢生成速率常数(Kf)和最低的过氧化氢分解速率常数(Kd),在可见光照射下过氧化氢生成速率达到6067μmol g^(-1)h^(-1),超过大多文献报道的COF基光催化剂性能.经4次光催化循环反应后,AT-1催化生成过氧化氢的产率略有下降,且FTIR谱、XRD谱和FESEM显示光催化反应前后AT-1的结构和形态几乎没有变化,表明其具有较好的光催化稳定性.此外,在本实验所制得的AT-x复合物中,AT-1具有最短的荧光平均寿命、最大的光电流响应和最小的阻抗,表明其具有最高的光生载流子迁移和分离能力.原位辐照X射线光电子能谱结果表明,界面电子在光照前后均从TB-COF转移到金纳米粒子,与密度泛函理论计算结果一致.电子顺磁共振和原位漫反射傅里叶变换红外光谱等实验证实了光催化过程中超氧自由基的存在,这表明AT-1光催化生产过氧化氢是连续两步单电子氧气还原的过程.实验还发现,当O_(2.被N_(2.替代时,几乎检测不到过氧化氢的产生,说明过氧化氢来源于O_(2.的还原反应.当用硝酸银和对苯醌分别作为捕获剂来消除·O_(2.^(−)和e^(−)时,光催化过氧化氢的产率显著下降,可推断·O_(2.^(−)和e^(−)是产生过氧化氢的关键物种.综上,本文详细研究了金纳米粒子作为助催化剂对COF光催化生成过氧化氢性能的促进作用,可为设计高效光催化生成过氧化氢的COF基催化剂提供参考.目前,光催化生产过氧化氢技术仍处于起步阶段,其产率仍处于mmol g^(-1)h^(-1)的水平,尚不能达到工业生产要求.开发高效的半导体催化剂是实现高效光催化生产过氧化氢的关键.未来还需要进一步提高光催化产过氧化氢的生成效率和选择性,解决O_(2.的有效吸附、可见光有效利用、光生载流子的分离与转移效率等问题,以推进光催化产过氧化氢技术的工业生产和商业应用.

关键词：共价有机框架金纳米粒子光催化双氧水生产氧气还原

核聚变堆用钨及钨基材料热负荷损伤行为的研究进展

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中国有色金属学报 2018年第4期28卷 719-731页

作者：吴玉程姚刚罗来马昝祥朱晓勇李萍程继贵合肥工业大学材料科学与工程学院合肥230009 合肥工业大学安徽省有色金属材料与加工工程实验室合肥230009 合肥工业大学有色金属与加工技术国家地方联合工程研究中心合肥230009

聚变堆在运行过程中面对等离子体钨基材料需要承受住一定次数稳态和瞬态热负荷的冲击而不发生开裂以及熔化等损伤。对商业钨在不同测试手段下热负荷的损伤行为进行了分析,阐述超细晶粒钨、合金化、掺杂碳化物以及稀土氧化物等改性手段... 详细信息

聚变堆在运行过程中面对等离子体钨基材料需要承受住一定次数稳态和瞬态热负荷的冲击而不发生开裂以及熔化等损伤。对商业钨在不同测试手段下热负荷的损伤行为进行了分析,阐述超细晶粒钨、合金化、掺杂碳化物以及稀土氧化物等改性手段对钨基材料热负荷性能的影响;对面对等离子体钨基材料热负荷损伤行为进行了总结与展望。

关键词：钨基材料面对等离子体材料热负荷第二相掺杂超细晶钨

Two-dimensional materials for future information technology: status and prospects

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science china(Information sciences) 2024年第6期67卷 1-147页

作者： Hao QIU Zhihao YU Tiange ZHAO Qi ZHANG Mingsheng XU Peifeng li Taotao li Wenzhong BAO Yang CHAI Shula CHEN Yiqi CHEN Hui-Ming {2. Daoxin DAI Zengfeng DI zhuo DONG Xidong DUAN Yuhan FENG Yu FU Jingshu GUO Pengwen GUO Yue HAO Jun HE Xiao HE Jingyi HU Weida HU Zehua HU Xinyue HUANG Ziyang HUANG Ali IMRAN Ziqiang KONG Jia li Qian li Weisheng li Lei liAO Bilu liU Can liU Chunsen liU Guanyu liU Kaihui liU liwei liU Sheng liU Yuan liU Donglin LU likuan MA Feng MIAO Zhenhua NI Jing NING Anlian PAN Tian-ling REN Haowen SHU litao SUN Yue SUN Quanyang TAO Zi-Ao TIAN Dong WANG Hao WANG Haomin WANG Jialong WANG Junyong WANG Wenhui WANG Xingjun WANG Yeliang WANG Yuwei WANG Zhenyu WANG Yao WE... school of Electronic science and Engineering Nanjing University school of Integrated Circuits Interdisciplinary Research Center for Future Intelligent Chips (Chip-X)Nanjing University school of Integrated Circuit science and Engineering Nanjing University of Posts and Telecommunications State Key Laboratory of Infrared Physics Shanghai Institute of Technical Physics Chinese Academy of Sciences school of Physics and Key Lab of Quantum materials and Devices of the Ministry of Education School of Electronic Science & EngineeringSoutheast University College of Integrated Circuits State Key Laboratory of Silicon and Advanced Semiconductor MaterialsZhejiang University Suzhou Laboratory State Key Laboratory of Integrated Chips and Systems School of MicroelectronicsFudan University Shaoxin Laboratory Department of Applied Physics The Hong Kong Polytechnic University Key Laboratory for Micro-Nano Physics and Technology of Hunan Province College of Materials Science and EngineeringHunan University College of Integrated Circuits Zhejiang University Shenzhen Geim Graphene Center Shenzhen Key Laboratory of Layered Materials for Value-Added ApplicationsTsinghua-Berkeley Shenzhen Institute & Institute of Materials ResearchTsinghua Shenzhen International Graduate SchoolTsinghua University State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZijingang CampusZhejiang University National Key Laboratory of materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences CAS Key Laboratory of Nanophotonic materials and Devices & Key Laboratory of Nanodevices and Applications i-LabSuzhou Institute of Nano-Tech and Nano-Bionics (SINANO)Chinese Academy of Sciences College of Chemistry and Chemical Engineering Hunan University Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education) Department of PhysicsRenmin University of China school

Over the past 70 years, the semiconductor industry has undergone transformative changes,largely driven by the miniaturization of devices and the integration of innovative structures and materials. Two-dimensional(2.) materials {2.ke transition metal dichalcogenides(TMDs) and graphene are pivotal in overcoming the {2.mitations of si{2.con-based technologies, offering innovative approaches in transistor design and functiona{2.ty, enab{2.ng atomic-thin channel transistors and mono{2.thic 3D integration. We review the important progress in the app{2.cation of 2. materials in future information technology, focusing in particular on microelectronics and optoelectronics. We comprehensively summarize the key advancements across material production, characterization metrology, electronic devices, optoelectronic devices, and heterogeneous integration on si{2.con. A strategic roadmap and key challenges for the transition of 2. materials from basic research to industrial development are out{2.ned. To faci{2.tate such a transition, key technologies and tools dedicated to 2. materials must be developed to meet industrial standards, and the employment of AI in material growth, characterizations, and circuit design will be essential. It is time for academia to actively engage with industry to drive the next 10 years of 2. material research.

关键词： two-dimensional (2.) materials information technology production technology standardization of characterization microelectronic devices optoelectronic devices multi-functional integration

A peroxidase-like single-atom Fe-N_(5)active site for effective killing human lung adenocarcinoma cells

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Nano Research 2023年第4期16卷 5216-5225页

作者： liye zhu Hong Zhong Dan Du Tao li Hoai Nguyen Scott PBeckman Wentao Xu Jin-cheng li Nan cheng Yuehe lin Beijing Laboratory for Food Quality and Safety College of Food Science and Nutritional EngineeringChina Agricultural UniversityBeijing 100083China school of Mechanical and materials Engineering Washington State UniversityPullmanWA 99164USA Faculty of Chemical Engineering Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus MaterialsKunming University of Science and TechnologyKunming 650500China Department of Chemistry and Biochemistry Northern Illinois University1425 W.Lincoln Hwy.DeKalbIL 60115USA X-ray science Division Argonne National Laboratory9700 S.Cass AveLemontIL 60439USA Material science Division Argonne National Laboratory9700 S.Cass AveLemontIL 60439USA

Single-atom catalyst(SAC)is one of the newest catalysts,and attracts people’s wide attention in cancer therapy based on their characteristics of maximum specific catalytic activity and high *** designed and synthesized a Fe-N decorated graphene nanosheet(Fe-N5/GN SAC)with the coordination number of *** enzymology and theoretical calculations,the Fe-N5/GN SAC has outstanding intrinsic peroxidase-like catalytic activity due to single-atom Fe site with five-N-coordination *** explored its potential on lung cancer therapy,and found that it could kill human lung adenocarcinoma cells(A549)by decomposing hydrogen peroxide(H_(2.O_(2.)into toxic reactive oxygen species(ROS)under acidic microenvironment in threedimensional(3D)lung cancer cell *** study demonstrates a promising application of SAC with highly efficient single-atom catalytic sites for cancer treatment.

关键词： single-atom catalyst three-dimensional(3D) cancer cell model peroxidase-like catalytic activity cancer therapy

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高熵化透明陶瓷研究进展

硅酸盐学报 2024年第3期52卷 945-972页

作者：韩文瀚朱兴华承刚郭浩李诗睿顾博森卢开雷卢铁城叶昱成齐建起四川大学物理学院成都610064 高能量物理及技术教育部重点实验室成都610064 四川文理学院四川达州635000 辐射物理及技术教育部重点实验室成都610064 香港大学李嘉诚医学院中国香港999077

透明陶瓷作为一种具有优异理化性能的结构功能一体化材料,多年来已在诸多领域替代传统透明材料进行使用,如固态照明、高功率固体激光器、高密度屏蔽窗口、光学元件及光电器件等,而近年来高熵陶瓷的研究为透明陶瓷的进一步发展提供新思... 详细信息

透明陶瓷作为一种具有优异理化性能的结构功能一体化材料,多年来已在诸多领域替代传统透明材料进行使用,如固态照明、高功率固体激光器、高密度屏蔽窗口、光学元件及光电器件等,而近年来高熵陶瓷的研究为透明陶瓷的进一步发展提供新思路。透明陶瓷高熵化使其可利用高的构型熵来改善或提升其力、热、光学等性能,从而实现更多领域、更深层次的功能化应用。综述了作为高熵透明陶瓷潜在结构的几种陶瓷体系的结构、制备、性能和应用进展,详细介绍了当前透明陶瓷高熵化研究的现况,并对其未来的发展及应用进行展望。

关键词：透明陶瓷高熵化光功能材料

醋酸改质钢渣制备高钙基吸附材料及动力学研究

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有色金属工程 2024年第7期14卷 78-89页

作者：成洁杨志彬朱祚峤李智翔常江鞠晓婷江苏科技大学张家港校区冶金工程学院江苏张家港215600 江苏省(沙钢)钢铁研究院环保资源研究室江苏张家港215625

为提高钢渣的资源综合利用并减少钢铁冶炼过程排放的CO_(2.,采用浸出-高温烧结工艺对转炉钢渣进行改质。通过浸出过程,将含钙组分制备成钙基吸附材料,同时富集回收浸出渣含铁组分。考察了浸出参数对钙基吸附剂组成的影响,为探究钢渣颗... 详细信息

为提高钢渣的资源综合利用并减少钢铁冶炼过程排放的CO_(2.,采用浸出-高温烧结工艺对转炉钢渣进行改质。通过浸出过程,将含钙组分制备成钙基吸附材料,同时富集回收浸出渣含铁组分。考察了浸出参数对钙基吸附剂组成的影响,为探究钢渣颗粒中钙的浸出过程,采用收缩核模型对钢渣颗粒在弱酸性溶液中的浸出速率进行了分析。研究了浸出渣经高温改质物相结构变化,并分析铁元素转变规律。此外,通过使用XRD和SEM分析钙基材料的物相结构。最后,测算钙基材料的吸附性能。结果表明,浸出温度和醋酸浓度对钙基材料中CaO含量影响较大。在较大的粒径下,最佳的浸出参数为酸浓度1 mol/L、固液比1∶10、浸出温度70℃以及时间2.h,此条件下CaO含量最高达86.3%。动力学结果表明,在搅拌条件下,钙浸出过程由内扩散控制。在40~70℃内,钙浸出过程的速率控制步骤未发生变化,仍由内扩散控制。制备的钙基材料CaO纯度较高,且CO_(2.吸附量随着CaO含量增加而增大,在常压条件下最高可达60.6 mg/g。对浸出渣高温改质后,Ca_(2.Fe_(2.O_(5)相转变成了尖晶石相(Fe_(3)O_(4)、MgFe_(2.O_(4)),钙铁元素得到了很好的分离和富集回收。

关键词：转炉钢渣 CO_(2.减排钙基吸附剂金属元素回收酸浸动力学

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乙烯渣油沥青组分的成焦性研究

燃料化学学报（中英文） 2024年第9期52卷 1348-1360页

作者：张桐桐朱慧慧朱亚明胡朝帅吕君程俊霞白永辉赵雪飞辽宁科技大学化工学院辽宁鞍山114051 河北工业职业技术大学河北石家庄050091 齐齐哈尔大学化工学院黑龙江齐齐哈尔161003 省部共建煤炭高效利用与绿色化工国家重点实验室宁夏银川750021

乙烯渣油沥青作为乙烯渣油中的重质组分具有含碳量高、芳香度较高及杂原子(S、N)含量低的特点,被广泛用作制备石油基人造炭材料的优选原料。为充分研究乙烯渣油沥青的成焦性,本研究选取四种溶剂(甲醇、正丁醇、正庚烷、二甲基亚砜)对乙... 详细信息

乙烯渣油沥青作为乙烯渣油中的重质组分具有含碳量高、芳香度较高及杂原子(S、N)含量低的特点,被广泛用作制备石油基人造炭材料的优选原料。为充分研究乙烯渣油沥青的成焦性,本研究选取四种溶剂(甲醇、正丁醇、正庚烷、二甲基亚砜)对乙烯渣油沥青进行萃取分离,获得八种乙烯渣油沥青组分(四种可溶组分和四种不溶组分),并对获得的乙烯渣油沥青组分进行热转化和炭化处理(热转化温度和炭化温度分别为500和1400℃)获得系列乙烯渣油沥青焦。采用红外光谱、热重分析仪、^(1)H-NMR对乙烯渣油沥青组分的基础物性进行研究;利用偏光显微镜、X射线单晶衍射仪、拉曼光谱仪、扫描电子显微镜等对系列石油系沥青焦结构进行研究。结果表明,乙烯渣油沥青不溶组分芳香性略高于可溶组分,且不溶组分支链略少于可溶组分;不溶组分热转化和炭化后得到的乙烯渣油沥青焦显微强度高于可溶组分获得的乙烯渣油沥青焦,且乙烯渣油沥青沥青焦HS-C的真密度高达2.0554 g/cm^(3)。

关键词：乙烯渣油沥青组分成焦性沥青焦

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Micro/nanodevices for assessment and treatment in stomatology and ophthalmology

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Microsystems & Nanoengineering 2021年第1期7卷 1-19页

作者： An’an Sheng Long lin Jia zhu Jian zhuang Jian li lingqian Chang Huanyu cheng The Institute of Single Cell Engineering Beijing Advanced Innovation Center for Biomedical Engineering school of Biological science and Medical Engineering Beihang University100191 BeijingChina Department of Stomatology Xiang’An Hospital of Xiamen University361100 XiamenChina school of Stomatology North China University of Science and Technology063210 TangshanChina Institute of Plastic Machinery and Plastic Engineering School of Mechanical and Electrical EngineeringBeijing University of Chemical Technology100029 BeijingChina Department of Engineering science and Mechanics Pennsylvania State UniversityUniversity ParkPA 16802USA.6 School of Biomedical EngineeringResearch and Engineering Center of Biomedical MaterialsAnhui Medical University230032 HefeiChina

Micro/nanodevices have been widely applied for the real-time monitoring of intracellular activities and the delivery of exogenous substances in the past few *** review focuses on miniaturized micro/nanodevices for assessment and treatment in stomatology and *** first summarize the recent progress in this field by examining the available {2. and fabrication techniques,device design principles,mechanisms,and biosafety aspects of micro/*** a discussion of biochemical sensing technology from the cellular level to the tissue level for disease assessment,we then summarize the use of microneedles and other micro/nanodevices in the treatment of oral and ocular diseases and conditions,including oral cancer,eye wrinkles,keratitis,and *** with the identified key challenges,this review concludes with future directions as a small fraction of vast opportunities,calling for joint efforts between clinicians and engineers with diverse backgrounds to help facilitate the rapid development of this burgeoning field in stomatology and ophthalmology.

关键词： treatment directions assessment

A 12. long-period stacking-ordered structure in a Mg-Ni-Y alloy

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Journal of materials science & Technology 2018年第12期34卷 2235-2239页

作者： cheng liu Yuman {2. Qun Luo Bin liu Qinfen Gu Qian li State Key Laboratory of Advanced Special Steels Shanghai Key Laboratory of Advanced FerrometallurgySchool of Materials Science and EngineeringShanghai Institute of Materials GenomeMaterials Genome InstituteShanghai UniversityShanghai 200444China Department of materials science and Engineering Monash UniversityVictoria 3800Australia Australian Synchrotron Clayton 3168Australia

A hitherto unreported long-period stacking-ordered(LPSO) phase, designated 12.R, was observed in a Mg80Ni5Y15(at.%) alloy. Microstructure was investigated by electron diffraction and high-angle annular dark-field scanning transmission electron microscopy. Results show that the 12.R has a trigonal lattice(a = b = 1.112.nm, c = 3.12. nm, α = β = 90°, and γ = 12.°). Unit cell of the 12.R is consisted of three ABCAtype building blocks and each building block contains dominant Ni6Y8-type building clusters. A sound structural model is proposed based on relative positions of Ni6Y8clusters in neighboring building blocks.

关键词： Mg alloys LPSO HAADF-STEM Crystal structure