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Super broadband absorbing hierarchical CoFe alloy/porous carbon@carbon nanotubes nanocomposites derived from metal-organic frameworks

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Journal of Materials Science & Technology 2022年第23期118卷 218-228页

作者： Siyao Guo Yunfeng Bao Ying Li Hailong Guan Dongyi Lei Tiejun Zhao baomin zhong Zhihong Li School of Civil Engineering Qingdao University of TechnologyQingdao 266033China Postdoctoral Workstation Guangdong Dongpeng Holding Company LimitedGuangdong 528031China Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone Qingdao University of TechnologyQingdao 266033China National Key Laboratory of Science and Technology for National Defence on Advanced Composites in special Environments Harbin Institute of TechnologyHarbin 150080China

The exploitation of electromagnetic wave absorption(EMA) materials has attracted ever-increasing attention,not only because electromagnetic wave(EMW) originated from overuse of electronic products has threatened human' health seriously,but also because EMA materials can effectively protect radar stealth from being detected.However,it is still a challenge to obtain broadband and efficient EMA materials to satisfy practical applications.In this work,we developed a series of hierarchical CoFe alloy/porous carbon@carbon nanotubes(CoFe/PC@CNTs) nanocomposites through revising the proportion of Fe^(2+) in the metal-organic frameworks(MOFs)(CoFe-ZIF) precursor and one-step simple pyrolysis process.The cross deposition between CoFe alloy,carbon nanotubes(CNTs),and porous carbon(PC) formed a double conductive network,favoring for achieving excellent EMA property.Surprisingly,when the filler mass ratio is only 10 wt%,the optimized CoFe/PC@CNTs nanocomposites display the best EMA capability,whose minimum reflection loss(RL_(min)) value is-68.94 dB at 13.69 GHz and the effective absorption band(EAB,<-10 dB) reaches up 9.14 GHz with a matching thickness of 2.63 mm.In addition,the largest EAB can achieve up to 11 GHz(3.35-14.35 GHz) during all matching thicknesses.The splendid EMA performance benefits the favorable dielectric loss provided by the double conductive network,the good magnetic loss benefited from the evenly distributed CoFe alloy,the excellent impedance matching,rich transmission paths,and multiple polarization.Therefore,such EMA materials with super broadband absorbing provide desirable candidates for lightweight and high-efficient microwave absorbers.

关键词： Electromagnetic wave absorption CoFe alloy/porous carbon@carbon nanotubes nanocomposites Broadband absorbing Metal-organic frameworks

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防滑陶瓷砖的研究进展

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中国陶瓷 2022年第2期58卷 43-48页

作者：徐瑜祁明钟保民金国庭佛山市东鹏陶瓷发展有限公司佛山528000

陶瓷砖不防滑一直以来都是消费者选择瓷砖产品的一大痛点,为了满足消费者的需求,解决痛点问题,国内外的专家学者和陶瓷企业的研发人员纷纷对陶瓷砖的防滑技术展开研究。分别从陶瓷砖防滑影响因素和防滑原理、防滑陶瓷砖的标准和检测方... 详细信息

陶瓷砖不防滑一直以来都是消费者选择瓷砖产品的一大痛点,为了满足消费者的需求,解决痛点问题,国内外的专家学者和陶瓷企业的研发人员纷纷对陶瓷砖的防滑技术展开研究。分别从陶瓷砖防滑影响因素和防滑原理、防滑陶瓷砖的标准和检测方法及防滑陶瓷砖的制备技术等三个方面,详细阐述了防滑陶瓷砖的研究现状和应用,并展望了防滑陶瓷砖今后的发展。

关键词：陶瓷砖防滑性能摩擦系数

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仿天然洞石瓷质抛光砖的研制

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中国陶瓷 2007年第4期43卷 43-44页

作者：王正旺曾德朝钟保民广东东鹏陶瓷股份有限公司佛山528000

通过“孕熔技术”模拟天然洞石石材形成的机理,开发出相应的“孕熔因子”并配以先进的布料工艺,制备出了逼真于天然洞石石材的瓷砖产品。

关键词：洞石瓷砖孕熔技术孕熔因子

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分散剂对吸收剂T-ZnO_w吸波性能的影响

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化工新型材料 2011年第6期39卷 118-120页

作者：陈志彦邢欣钟保民曾德朝中南林业科技大学材料科学与工程学院长沙410004 广东东鹏陶瓷股份有限公司佛山528031 国防科技大学新型陶瓷纤维及其复合材料重点实验室长沙410073

四针状氧化锌晶须(T-ZnOw)具有三维四针状结构,具有材料增强、抗静电、抗菌、吸波和吸声等特性,是一种非常有发展前途的多功能材料。研究分散剂三乙醇胺对T-ZnOw性能的影响。结果表明,当三乙醇胺添加量为0.3%时,T-ZnOw在环氧树脂溶液中... 详细信息

四针状氧化锌晶须(T-ZnOw)具有三维四针状结构,具有材料增强、抗静电、抗菌、吸波和吸声等特性,是一种非常有发展前途的多功能材料。研究分散剂三乙醇胺对T-ZnOw性能的影响。结果表明,当三乙醇胺添加量为0.3%时,T-ZnOw在环氧树脂溶液中分散性最好;最大雷达波吸收峰移向低频约10GHz。

关键词：四针状ZnO晶须分散剂吸波涂层

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以陶瓷抛光渣为辅助骨料制备瓷砖粘结剂的研究

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佛山陶瓷 2016年第12期26卷 19-21页

作者：龚晖许林峰钟保民广州珠江光电新材料有限公司广州510760 广东东鹏陶瓷股份有限公司佛山528000

以陶瓷抛光废渣为辅助骨料制备瓷砖粘结剂,具有重要的经济意义和社会环保意义。本文通过实验研究了抛光废渣和胶粉添加量对水泥砂浆拉拔强度的影响。并研究了抛光废渣添加量对水添加量的影响。结果表明,抛光废渣对水泥砂浆拉拔强度有显... 详细信息

以陶瓷抛光废渣为辅助骨料制备瓷砖粘结剂,具有重要的经济意义和社会环保意义。本文通过实验研究了抛光废渣和胶粉添加量对水泥砂浆拉拔强度的影响。并研究了抛光废渣添加量对水添加量的影响。结果表明,抛光废渣对水泥砂浆拉拔强度有显著的影响。当胶粉添加量为2 wt%、抛光废渣的添加量为25 wt%时,样品的各项性能指标最优。

关键词：陶瓷抛光渣粘结剂骨料

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利用黄金尾矿废渣制备多孔墙体建材的研究

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中国陶瓷 2021年第12期57卷 65-71页

作者：江彬轩李月明王竹梅李智鸿钟保民张智鹏张玉玮秦汉佛山市东鹏陶瓷发展有限公司佛山528000 景德镇陶瓷大学材料科学与工程学院中国轻工业功能陶瓷材料重点实验室江西省能量存储与转换陶瓷材料工程实验室景德镇333403

利用黄金尾矿废渣为原料,采用直接发泡法制备高温闭孔墙体建材。通过正交实验确定了发泡剂的最佳含量及最佳烧成制度,研究了发泡剂细度及烧成制度对发泡体气孔结构及性能的影响。结果表明,在1160℃时SiC发泡剂发泡效果较为稳定,并且SiC... 详细信息

利用黄金尾矿废渣为原料,采用直接发泡法制备高温闭孔墙体建材。通过正交实验确定了发泡剂的最佳含量及最佳烧成制度,研究了发泡剂细度及烧成制度对发泡体气孔结构及性能的影响。结果表明,在1160℃时SiC发泡剂发泡效果较为稳定,并且SiC细度越小,形成的气孔相对越小越均匀。选择细度15μm质量分数(下同)5%的SiC微粉与原料混合制坯,在3℃/min的速度下升温至1160℃并保温1 h,制得的样品性能最佳,体积密度达到0.58 g/cm^(3),抗折强度达到4.92 MPa,内部气孔相对较小且均匀。因此,通过实验结果得出最佳配方为尾砂50%,钠长石35%,钾长石5%,黏土10%,细度15μm SiC微粉5%。

关键词：黄金尾矿发泡剂细度烧成制度 SiC细度

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A laser synthesis of vanadium oxide bonded graphene for high-rate supercapacitors

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Journal of Energy Chemistry 2020年第10期29卷 174-178页

作者： Jun Tang Linfei Zhang Xiongwei zhong Xinghui Wang Feng Pan baomin Xu School of Advanced Materials Peking University Shenzhen Graduate SchoolPeking UniversityShenzhen 518055GuangdongChina Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055GuangdongChina Institute of Micro/Nano Devices and Solar Cells School of Physics and Information EngineeringFuzhou UniversityFuzhou 350108FujianChina

Graphene is a type of promising electrode material for high-energy and high-power density supercapacitors,but its electrochemical performance is greatly limited by the restacking problem.In this work,we reported a facile approach to synthesis graphene with chemically bonded vanadium oxide(VOx)nanoparticles and demonstrated that chemically-bonded VOxnanoparticles can effectively prevent the graphene sheets from restacking and hence improve the electrochemical performance.The capacitance of VOxbonded graphene increases to 272 F/g compared to 183 F/g of pristine graphene in 1 M H3PO4 aqueous electrolyte at 2 A/g.The VOx-bonded graphene also showed improved rate capability in both H3PO4 and ionic liquid electrolytes.The capacitance retention increases to 54.5%from 28.5%at 100 A/g(compare to2 A/g)in H3PO4 and increases to 65.1%from 46.3%at 2 A/g(compare to 0.2 A/g)in neat ionic liquid.A high energy density of 84.4 Wh/kg is obtained within the voltage window of 4 V in ionic liquid.Even at a high-power density of 1000 W/kg,the VOx-bonded graphene shows a high energy density of 47.3 Wh/kg.

关键词： Supercapacitors Restacking Vanadium oxides Laser reduced graphene

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Recent progress in perovskite solar cells:material science

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Science China Chemistry 2023年第1期66卷 10-64页

作者： Jiang-Yang Shao Dongmei Li Jiangjian Shi Chuang Ma Yousheng Wang Xiaomin Liu Xianyuan Jiang Mengmeng Hao Luozheng Zhang Chang Liu Yiting Jiang Zhenhan Wang Yu-Wu zhong Shengzhong(Frank)Liu Yaohua Mai Yongsheng Liu Yixin Zhao Zhijun Ning Lianzhou Wang baomin Xu Lei Meng Zuqiang Bian Ziyi Ge Xiaowei Zhan Jingbi You Yongfang Li Qingbo Meng Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Laboratory for Renewable Energy(CAS) Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologyInstitute for Advanced Energy MaterialsSchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119China Institute of New Energy Technology College of Information Science and TechnologyJinan UniversityGuangzhou 510632China School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China Australian Institute for Bioengineering and Nanotechnology and School of Chemical Engineering The University of QueenslandSt LuciaBrisbaneQLD 4072Australia Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Key Laboratory of Polymer Chemistry and Physics of Ministry of Education School of Materials Science and EngineeringPeking UniversityBeijing 100871China Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China Dalian National Laboratory for Clean Energy Collaborative Innovation Center of Chemistry for Energy Materials(iChEM)Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Key Laboratory of Funct

Perovskite solar cells represent a promising third-generation photovoltaic technology with low fabrication cost and high power conversion efficiency.In light of the rapid development of perovskite materials and devices,a systematic survey on the latest advancements covering a broad range of related work is urgently needed.This review summarizes the recent major advances in the research of perovskite solar cells from a material science perspective.The discussed topics include the devices based on different type of perovskites(organic-inorganic hybrid,all-inorganic,and lead-free perovskite and perovskite quantum dots),the properties of perovskite defects,different type of charge transport materials(organic,polymeric,and inorganic hole transport materials and inorganic and organic electron transport materials),counter electrodes,and interfacial materials used to improve the efficiency and stability of devices.Most discussions focus on the key progresses reported within the recent five years.Meanwhile,the major issues limiting the production of perovskite solar cells and the prospects for the future development of related materials are discussed.

关键词： perovskite solar cells power conversion efficiency perovskite materials hole transport materials electron transport materials counter electrode materials interfacial functional materials defects

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A multicenter retrospective cohort study of ketogenic diet therapy in 481 children with infantile spasms

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Acta Epileptologica 2022年第1期5卷 42-49页

作者： Yuanzhen Ye Dan Sun Hua Li Jianmin zhong Rong Luo baomin Li Dengna Zhu Dan Li Shaoping Huang Yuwu Jiang Nong Xiao Yucai Chen Yuqin Zhang Mei Yu Xiaoyun Shen Li Gao Guo Zheng Congmin Zhao Baoqiang Yuan Jianxiang Liao Jiong Qin CAAE KD group Shenzhen Children's Hospital Shenzhen 518038China Wuhan Children's Hospital Wuhan 430019China Guangdong 999 Brain Hospital Guangzhou 510515China Jiangxi Provincial Children's Hospital Nanchang 330006China West China Second University Hospital Sichuan UniversityChengdu 610044China Qilu Hospital of Shandong University Jinan 250063China Third Affiliated Hospital Zhengzhou UniversityZhengzhou 450015China The Second Affiliated Hospital of Xi’an Jiaotong University Xian 710004China Peking University First Hospital Beijing 100034China Children's Hospital of Chongqing Medical University Chongqing 400015China Children^Hospital of Shanghai Shanghai 20006China Tianjin Children's Hospital Tianjing 300134China Henan Provincial People's Hospital Zhengzhou 451161China Nanjing Children's Hospital Nanjing 210008China Xinqiao Hospital Army Medical UniversityChongqing 400037China The Affiliated Hospital of Xuzhou Medical University Xuzhou 221004China Peking University Peopled Hospital Beijing 100044China

Background:Ketogenic diet(KD)therapy is one of the main treatments for drug-resistant epilepsy.However,the KD therapy has been applied in only a small number of infantile spasm cases.In this large multicenter study,we investigated the efficacy of KD therapy in the treatment of infantile spasms.Methods:In this retrospective,multicenter cohort study,clinical data from main epilepsy centers were analyzed.Patients were classified into different groups according to age,type of drug and whether glucocorticoid was used before initiation of KD.Results:From October 2014 to March 2020,481 patients(308 males and 173 females)with infantile spasms were treated with the KD therapy.The age of the patients ranged from 2 months to 20 years,with a mean age of 1 year and 10 months.The number of anti-seizure medications(ASMs)used before KD initiation ranged 0-6,with a median of 3.In different time from initiation(1,3,6,and 12 months),the rates of seizure freedom after KD were 6.9,11.6;16.0 and 16.8%,respectively(x^(2)=27.1772,P0.05).Two hundred and eighteen patients(45.3%)failed to respond to c

关键词： Epilepsy Infantile spasms Ketogenic diet Adverse events Effectiveness rate West syndrome Multicenter study Retrospective Cohort

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不同燃尽风率下炉内NO_x生成特性空间分布研究

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机械工程学报 2015年第18期51卷 167-174页

作者：钟亚峰孙保民赵晓山汪涛康志忠华北电力大学电站设备状态监测与控制教育部重点实验室北京102206

运用CFD软件模拟不同燃尽风率下炉内NOx生成特性,根据相应的煤质选择了合适的NOx模型,模拟的结果能够较好地与改造前后的实测数据吻合,验证了模型的准确性。在该数值模型的基础上,针对不同燃尽风率的模拟结果进行分析,阐述NOx的生成特... 详细信息

运用CFD软件模拟不同燃尽风率下炉内NOx生成特性,根据相应的煤质选择了合适的NOx模型,模拟的结果能够较好地与改造前后的实测数据吻合,验证了模型的准确性。在该数值模型的基础上,针对不同燃尽风率的模拟结果进行分析,阐述NOx的生成特性在不同燃尽风率下的变化。结果表明,空间分布法能够详细地描述炉内燃烧状况及NOx生成。燃尽风率的变化对挥发分的析出影响较小。高燃尽风率使得主燃区缺氧程度加深,焦炭的燃尽会被推迟,主燃区还原性气氛得到增强,主燃区燃料型和热力型NOx的生成速率均有所下降,NOx浓度得以降低。但主燃区剩余未完全燃烧物质及焦炭推迟燃尽使得在燃尽区有更多HCN被氧化产生燃料型NOx,使得最高燃尽风率下炉膛出口的NOx浓度不一定达到最低。控制出口NOx的浓度主要是根据煤质合理选择燃尽风率,控制主燃区燃料型NOx的生成和燃尽区燃料型NOx的反弹。

关键词：数值模拟空间分布燃尽风率燃料型NOx 热力型NOx

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