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Hierarchically porous Fe/N/S/C nanospheres with high-content of Fe-Nx for enhanced ORR and Zn-air battery performance

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Green Energy & Environment 2023年第6期8卷 1693-1702页

作者： Luming Wu Ruge Zhao Guo Du Huan Wang Machuan Hou Wei Zhang Pingchuan Sun tiehong chen Institute of New Catalytic Materials Science School of Materials Science and EngineeringNankai UniversityTianjin300350China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Renewable Energy Conversion and Storage CenterCollege of ChemistryNankai UniversityTianjin300071China Haihe Laboratory of Sustainable Chemical Transformations Tianjin300192China Key Laboratory of Functional Polymer Materials(MOE) College of ChemistryNankai UniversityTianjin300071China

Heteroatom-doped carbon-based transition-metal single-atom catalysts(SACs) are promising electrocatalysts for oxygen reduction reaction(ORR). Herein, with the aid of hierarchically porous silica as hard template, a facile and general melting perfusion and mesopore-confined pyrolysis method was reported to prepare single-atomic Fe/N–S-doped carbon catalyst(FeNx/NC-S) with hierarchically porous structure and well-defined morphology. The FeNx/NC-S exhibited excellent ORR activity with a half-wave potential(E_(1/2)) of 0.92 V, and a lower overpotential of 320 mV at a current density of 10 mA cm^(-2)for OER under alkaline condition. The remarkable electrocatalysis performance can be attributed to the hierarchically porous carbon nanospheres with S doping and high content of Fe-Nx sites(up to 3.7 wt% of Fe), resulting from the nano-confinement effect of the hierarchically porous silica spheres(NKM-5) during the pyrolysis process. The rechargeable Zn-air battery with FeNx/NC-S as a cathode catalyst demonstrated a superior power density of 194.5 mW cm-2charge–discharge stability. This work highlights a new avenue to design advanced SACs for efficient sustainable energy storage and conversion.

关键词： Melting perfusion Nano-confined pyrolysis Hierarchically porous High content of Fe-Nx sites Sulfur doping Oxygen reduction reaction

跨学科实践促成初中生物学概念教学——以“绿色植物与生物圈的水循环”为例

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生物学教学 2024年第3期49卷 14-17页

作者：陈铁洪陈晓梅福建省惠安第三中学泉州362100

生物学教学过程中开展跨学科实践活动可以促进学生对概念的构建,实现概念的内化和应用,提升动手实践和问题解决能力。以“绿色植物与生物圈的水循环”为例,通过创设生活化情境、唤醒概念认知冲突,开展跨学科实践、搭设概念构建平台,解... 详细信息

生物学教学过程中开展跨学科实践活动可以促进学生对概念的构建,实现概念的内化和应用,提升动手实践和问题解决能力。以“绿色植物与生物圈的水循环”为例,通过创设生活化情境、唤醒概念认知冲突,开展跨学科实践、搭设概念构建平台,解决真实性问题,从而实现概念体系构建和拓展应用,以期为生物学概念教学策略提供参考。

关键词：跨学科实践概念教学初中生物学

Hierarchically porous zeolites synthesized with carbon materials as templates

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Frontiers of Chemical Science and Engineering 2021年第6期15卷 1444-1461页

作者： Huan Wang Guo Du Jiaqing Jia Shaohua chen Zhipeng Su Rui chen tiehong chen Institute of New Catalytic Materials Science School of Materials Science and EngineeringKey Laboratory of Advanced Energy Materials Chemistry(MOE)Nankai UniversityTianjin300350China

Hierarchically porous zeolites are promising candidates in catalytic conversion of relatively bulky molecules,and their syntheses have attracted significant attention.From both industrial and scientific perspectives,different carbon materials have been widely employed as hard templates for the preparation of hierarchically porous zeolites during the past two decades.In this review,the progress in synthetic strategies using carbon materials as templates is comprehensively summarized.Depending on the affinity between the carbon templates and zeolite precursors,the substantial strategies for synthesizing hierarchical zeolites are introduced in direct templates and indirect templates.Direct templates methods,by which the carbon materials are directly mixed with precursors gel as hard templates,are first reviewed.Then,we discuss the indirect templates method(crystallization of carbon-silica composites),by which the carbon is produced by in situ pyrolysis of organic-inorganic precursors.In addition,the technique of encapsulating metal species into zeolites crystals with the assistance of carbon templates is also discussed.In the conclusion part,the factors affecting the synthesis of carbon-templated hierarchically porous zeolites are remarked.This review is expected to attract interest in the synthesis strategies of hierarchically porous zeolites,especially cost-effective and large-scale production methodologies,which are essential to the industrial application of hierarchical zeolites.

关键词： hierarchical zeolites carbon materials direct templates indirect templates carbon-silica composites

Synthesis of silica particles with lamellar and wormhole-like bi-modal mesopores using anionic surfactant as the template

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Science China Chemistry 2009年第9期52卷 1423-1426页

作者： HE WenChao WANG JinGui chen tiehong Institute of New Catalytic Materials Science Key Laboratory of Energy-Material Chemistry(Tianjin)and Engineering Research Center of Energy Storage&Conversion(MOE)College of ChemistryNankai UniversityTianjin 300071China

Silica particles with lamellar and wormhole-like bi-modal mesopores have been synthesized using anionic surfactant (N-lauroylsarcosine sodium) as the template. The particles with diameters of 300―500 nm possess bi-modal mesopores with pore sizes of 3 nm and 12 nm, which were ascribed to the disordered wormhole-like mesophase and lamellar mesophase, respectively. The BET surface area of the particles was 536 m2/g and the pore volume was 0.83 cm3/g. The lamellar mesophase and cylindrical mesophase were formed due to the co-assembly of the anionic surfactant and its protonized polar oil.

关键词： lamellar structure anionic surfactant mesoporous silica morphology N-lauroylsarcosine sodium

O-37-Ultrasound-assisted Synthesis of Hollow Mesoporous Silica with Controlled Mesostructure

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O-37-Ultrasound-assisted Synthesis of Hollow Mesoporous Sili...

第十五届全国分子筛大会

作者： Jingui Wang tiehong chen Institute of New Catalytic Materials Science College of ChemistryNankai University

＜正＞Hollow silica with radial,wormhole-like and lamellar mesostructure was firstly synthesized by an ultrasound-assisted method in anionic surfactant templated system.

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干眼患者临床特征的多中心研究

眼科 2024年第2期33卷 120-125页

作者：任杰刘畅周奇志曾庆延李玲窦泽夏王丛香陈铁红鲁静晏艳霜牛晓霞孙旭光李绍伟北京爱尔英智眼科医院北京100021 爱尔角膜病研究所北京100021 首都医科大学附属北京路河医院眼科北京101149 重庆眼视光医院重庆40000 汉口爱尔眼科医院武汉430060 长沙爱尔眼科医院长沙410015 沈阳爱尔眼科医院沈阳110003 成都爱尔眼科医院成都610000 广州爱尔眼科医院广州510040 海南爱尔新希望眼科医院海口460000 哈尔滨爱尔眼科医院哈尔滨150000 首都医科大学附属北京同仁医院、北京同仁眼科中心北京市眼科研究所北京100730 中南大学爱尔眼科学院长沙410000

目的分析眼科门诊干眼患者的临床特征。设计多中心临床研究研究对象爱尔集团北京、重庆、汉口、长沙、沈阳、成都、广州、哈尔滨8个眼科医院十眼门诊4497例初诊为十眼的患者方法回顾性分析2017年6月至2019年6月8个城市爱尔眼科医院初诊... 详细信息

目的分析眼科门诊干眼患者的临床特征。设计多中心临床研究研究对象爱尔集团北京、重庆、汉口、长沙、沈阳、成都、广州、哈尔滨8个眼科医院十眼门诊4497例初诊为十眼的患者方法回顾性分析2017年6月至2019年6月8个城市爱尔眼科医院初诊为干眼患者的临床资料。所有患者均行眼表疾病指数问卷量表(OSDI)调查、中国干眼问卷量表调查,荧光染色泪膜破裂时间(FBUT)、角膜荧光染色、泪液分泌试验(ST)及脸板腺检查。将十眼患者分为南方(重庆、武汉、长沙、成都、广州)、北方(北京、沈阳、哈尔滨)两组干眼类型分为水液缺乏型、脸板腺功能障碍(MCD)相关型及混合型。干眼严重程度分为轻度、中度及重度主要指标OSDI评分、中国干眼问卷量表得分,FBUT、ST、脸板腺评分。结果4497例患者中水液缺乏型127例(3.0%)。MGD相关型2308例(53.7%),混合型1864(43.4%)。其中MGD4172例,占总数的92.8%。轻度干眼3970例(88.3%)、中度381例(8.5%)、重度119例(2.6%)。北方组患者的ST为(8.1±6.6)mm,明显低于南方组患者的(9.6±7.4)mm(t=-6.470.P<0.001);北方组患者的0SDI评分(22.3±14.4),明显高于南方组患者的(20.7±13.2)(t=3.652,P<0.001);北方组患者的脸板腺分级评分(1.6±0.7),明显高于南方组患者的(1.5±0.7)(t=5.351,P<0.001)。北方的中度及重度干眼患者比例(9.9%,3.5%)较南方(5.4%,0.9%)高(X=52.669,P<0.001)。结论MCD相关的干眼在中国干眼门诊患者中比例较高;中国北方干眼患者中度及重度比例较南方高。

关键词：干眼脸板腺功能障碍多中心研究

SYNTHESIS OF NANOPOROUS SILICA WITH INTERIOR COMPOSITE CELLS WITH SYNTHETIC BLOCK COPOLYPEPTIDE AS TEMPLATE

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Chinese Science Bulletin 2006年第4期51卷 493-497页

作者： LIU Yuping ZHOU Huijing SHEN Zhurui LI Liying ZHOU Xingdi SUN Pingchuan YUAN Zhongyong chen tiehong LI Baohui DING Datong Department of Materials Chemistry Key Laboratory of FunctionalPolymer Materials of Ministry of Education College of ChemistryNankai University Tianjin 300071 China College of Physics Nankai University Tianjin 300071 China

Nanoporous silica with unusual interior composite cells was synthesized with synthetic block copolypeptide Phe20-b-PBLG50 as template for the first time. Anilino-methyl triethoxy silane (AMTS) was used as an intermedium to interact with block co-polypeptide Phe20-b-PBLG50 through π-π interaction between the phenyl groups of block copolypeptide and those of AMTS. Meanwhile, AMTS co-condenses together with tetraethoxylsilane (TEOS) after hy-drolysis. The structure of composite vesicles due to the self-assembly of block copolypeptide in the or-ganic solvent was immobilized and transcribed by the formation of silica. The formation of nanopores could be ascribed to the secondary structure of block co-polypeptide and small molecular amine. Our results provide a new avenue to synthesize porous oxide materials with novel interior structures templated by the copolypeptide self-assembly under ambient con-ditions.

关键词：纳米多孔硅合成模板法 π-π交互作用自组装多肽

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介孔二氧化硅KIT-6介观单晶微球的合成

无机盐工业 2022年第7期54卷 149-156页

作者：洪美花刘冠锋宫毓鹏李立青陈铁红中海油天津化工研究设计院有限公司天津300131 南开大学材料科学与工程学院

以非离子表面活性剂[聚环氧乙烷(PEO)-聚环氧丙烷(PPO)-聚环氧乙烷三嵌段共聚物,P123]和阳离子聚电解质(聚二甲基二烯丙基氯化铵,PAC)形成的复合物胶束为模板,合成了具有球形形貌的介孔二氧化硅KIT-6介观单晶微球。通过扫描电镜(SEM)、... 详细信息

以非离子表面活性剂[聚环氧乙烷(PEO)-聚环氧丙烷(PPO)-聚环氧乙烷三嵌段共聚物,P123]和阳离子聚电解质(聚二甲基二烯丙基氯化铵,PAC)形成的复合物胶束为模板,合成了具有球形形貌的介孔二氧化硅KIT-6介观单晶微球。通过扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)、氮气物理吸附和热重分析(TGA)等手段对合成材料的形貌及孔结构进行了表征分析。结果表明,以有机复合物胶束为模板合成出的介孔KIT-6二氧化硅材料具有较规整的球形形貌,颗粒直径为2~3µm,具有较大的比表面积和孔体积(747 m^(2)/g和1.3 cm^(3)/g),介孔孔径为8.5 nm,且在整个颗粒内部介孔保持高度的有序排列。由于长链聚电解质PAC与硅源有着较强相互作用,样品可以在较高水热温度下(160℃)合成,有利于提升介观结构的稳定性。该合成方法对于介孔二氧化硅KIT-6单晶微球的合成及其在催化及吸附分离等领域的应用具有一定的启发意义。

关键词：介孔二氧化硅 KIT-6 有序介孔非离子表面活性剂阳离子聚电解质

简述聚电解质-表面活性剂复合物为模板合成多级孔结构材料

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石油学报（石油加工） 2014年第1期30卷 100-109页

作者：史成香孙平川陈铁红南开大学化学学院天津化学化工协同创新中心天津300071

采用以聚电解质/表面活性剂复合物介晶为模板引导无机硅源前驱体组装的方法,首次合成了具有多级孔结构的介孔二氧化硅SBA-1的单晶颗粒。改变合成条件可调变多级孔结构介孔二氧化硅的形貌及结构,由此合成了一系列具有多级孔结构的介孔二... 详细信息

采用以聚电解质/表面活性剂复合物介晶为模板引导无机硅源前驱体组装的方法,首次合成了具有多级孔结构的介孔二氧化硅SBA-1的单晶颗粒。改变合成条件可调变多级孔结构介孔二氧化硅的形貌及结构,由此合成了一系列具有多级孔结构的介孔二氧化硅样品,并通过直接掺杂法合成了多级结构的介孔杂原子分子筛,并将其应用在催化反应中。将此方法应用于介孔沸石的合成中,成功合成了介孔沸石Silicalite-1。结果表明,聚电解质/表面活性剂为动态模板制备的多级孔结构材料具有单晶体的特征,同时还具有二次孔,有利于物质传输以及物料扩散。与单一孔道的介孔及沸石材料相比,具有多级孔结构的材料在催化、吸附等应用中均表现出优越的性能。

关键词：聚电解质-表面活性剂复合物多级结构介孔二氧化硅介孔沸石