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Low-temperature chemistry in plasma-driven ammonia oxidative pyrolysis

Green Energy & Environment 2024年第9期9卷 1477-1488页

作者： mingming zhang Qi Chen Guangzhao Zhou Jintao Sun He Lin School of Mechanical Electronic and Control Engineering Beijing Jiaotong University School of Mechanical Engineering Shanghai Jiao Tong University

Ammonia is gaining increasing attention as a green alternative fuel for achieving large-scale carbon emission reduction. Despite its potential technical prospects, the harsh ignition conditions and slow flame propagation speed of ammonia pose significant challenges to its application in engines. Non-equilibrium plasma has been identified as a promising method, but current research on plasma-enhanced ammonia combustion is limited and primarily focuses on ignition characteristics revealed by kinetic models. In this study, low-temperature and low-pressure chemistry in plasma-assisted ammonia oxidative pyrolysis is investigated by integrated studies of steady-state GC measurements and mathematical simulation. The detailed kinetic mechanism of NH3decomposition in plasma-driven Ar/NH3and Ar/NH3/O2mixtures has been developed. The numerical model has good agreements with the experimental measurements in NH3/O2consumption and N2/H2generation, which demonstrates the rationality of modelling. Based on the modelling results, species density profiles, path flux and sensitivity analysis for the key plasmaproduced species such as NH2, NH, H2, OH, H, O, O（1D）, O2（a1△g）, O2（b1∑g+）, Ar*, H-, Ar+, NH3+, O2-in the discharge and afterglow are analyzed in detail to illustrate the effectiveness of the active species on NH3excitation and decomposition at low temperature and relatively higher E/N values. The results revealed that NH2, NH, H as well as H2are primarily generated through the electron collision reactions e + NH3→ e + NH2+ H, e + NH3→ e + NH + H2and the excited-argon collision reaction Ar*+ NH3+ H → Ar + NH2+ 2H, which will then react with highly reactive oxidative species such as O2*, O*, O, OH, and O2to produce stable products of NOx and H2O. NH3→ NH is found a specific pathway for NH3consumption with plasma assistance, which further highlights the enhanced kinetic effects.

关键词： Non-equilibrium plasma Ammonia fuel Oxidative pyrolysis Pathway flux analysis Sensitivity analysis

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Bifunctional core–shell co-catalyst for boosting photocatalytic CO_(2) reduction to CH_(4)

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Nano Research 2024年第3期17卷 1259-1266页

作者： Fangxu Dai mingming zhang Jishu Han Zhenjiang Li Shouhua Feng Jun Xing Lei Wang Key Laboratory of Eco-chemical Engineering Ministry of EducationCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China College of Environment and Safety Engineering Qingdao University of Science and TechnologyShandong Engineering Research Center for Marine Environment Corrosion and Safety ProtectionQingdao 266042China

Solar-light-driven CO_(2) reduction CO to CH_(4) and C2H6 is a complex process involving multiple elementary reactions and energy ***,achieving high CH_(4) activity and selectivity remains a significant ***,we integrate bifunctional Cu2O and Cu-MOF(MOF=metal-organic framework)core–shell co-catalysts(Cu2O@Cu-MOF)with semiconductor TiO_(2).Experiments and theoretical calculations demonstrate that Cu2O(Cu+facilitates charge separation)and Cu-MOF(Cu2+improves the CO_(2) adsorption and activation)in the core–shell structure have a synergistic effect on photocatalytic CO_(2) reduction,reducing the formation barrier of the key intermediate*COOH and**** photocatalyst exhibits high CH_(4) yield(366.0μmol·g^(-1)·h^(-1)),efficient electron transfer(3283μmol·g^(-1)·h^(-1))and hydrocarbon selectivity(95.5%),which represents the highest activity of Cu-MOF-based catalysts in photocatalytic CO_(2) reduction *** work provides a strategy for designing efficient photocatalysts from the perspective of precise regulation of components.

关键词： bifunctional co-catalyst core–shell photocatalytic CO_(2)reduction

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Enhancing the Photosensitivity of Hypocrellin A by Perylene Diimide Metallacage‑Based Host–Guest Complexation for Photodynamic Therapy

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Nano-Micro Letters 2024年第11期16卷 71-87页

作者： Rongrong Li Tianfeng Yang Xiuhong Peng Qian Feng Yali Hou Jiao Zhu Dake Chu Xianglong Duan Yanming zhang mingming zhang State Key Laboratory for Mechanical Behavior of Materials Shaanxi International Research Center for Soft MatterSchool of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049People’s Republic of China School of Pharmacy Health Science CenterXi’an Jiaotong UniversityXi’an 710061People’s Republic of China Department of Rehabilitation Medicine Shaanxi Provincial People’s HospitalXi’an 710068ShaanxiPeople’s Republic of China Department of Gastroenterology The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061People’s Republic of China

The development of supramolecular hosts which can efficiently encapsulate photosensitizers to improve the photodynamic efficacy holds great promise for cancer ***,we report two perylene diimide-based metallacages that can form stable host–guest complexes with planar conjugated molecules including polycyclic aromatic hydrocarbons and photosensitizers(hypocrellin A).Such host–guest complexation not only prevents the aggregation of photosensitizers in aqueous environments,but also offers fluorescence resonance energy transfer(FRET)from the metallacage to the photosensitizers to further improve the singlet oxygen generation(Φ_(Δ)=0.66).The complexes are further assembled with amphiphilic polymers,forming nanoparticles with improved stability for anticancer *** in vitro and in vivo studies indicate that the nanoparticles display excellent anticancer activities upon light irradiation,showing great potential for cancer photodynamic *** study provides a straightforward and effective approach for enhancing the photosensitivity of conventional photosensitizers via host–guest complexation-based FRET,which will open a new avenue for host–guest chemistry-based supramolecular theranostics.

关键词： Metallacages Host-guest interactions Fluorescence resonance energy transfer Singlet oxygen Photodynamic therapy

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Solution-processed all-inorganic lead halide perovskite/layered double hydroxides superlattices

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Science China Chemistry 2024年第9期67卷 2904-2910页

作者： Deyu Li mingming zhang Lulu Wei Shubing Tian Mingze Sun Kang Liu Jixiang Xu Lei Wang Jun Xing Key Laboratory of Eco-chemical Engineering Ministry of EducationCollege of Chemistry and Molecular EngineeringQingdao University of Science&TechnologyQingdao 266042China College of Sino-German Science and Technology Qingdao University of Science&TechnologyQingdao 266042China

Quantum wells and superlattices are key building blocks in the semiconductor industry,normally fabricated using epitaxial growth techniques,such as vapor phase epitaxy,metalorganic chemical vapor deposition and molecular beam ***,these complicated preparation processes,as well as their high cost,limit their extensive *** is essential to develop a simple solution process for building ***,we demonstrate an ion exchange strategy for synthesizing an allinorganic superlattice cesium lead bromide/layered double hydroxides(CsPbBr_3/LDH)in *** room temperature,the perovskite ions diffuse into the interlayer of LDH and assemble into layered perovskite with various *** with traditional organic-inorganic hybrid perovskite superlattice,the all-inorganic perovskite superlattice CsPbBr_(3)/LDH has weak quantum confinement,which exhibits narrow emission line-widths of 20 nm,high quantum yields of 55%,and radiative lifetimes of several *** findings offer a new route to synthesize novel perovskite superlattices and enrich the perovskite supercrystal platform for electronics,photonics and optoelectronics devices.

关键词： halide perovskite superlattice layered double hydroxides 2D

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Gas sensors based on metal-organic frameworks:Challenges and opportunities

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结构化学 2024年第3期43卷 67-73页

作者： Xiaoyan Peng Xuanhao Wu Fan Yang Yefei Tian mingming zhang Hongye Yuan State Key Laboratory for Mechanical Behavior of Materials Shaanxi International Research Center for Soft MatterSchool of Materials Science and EngineeringXi'an Jiaotong UniversityXi'an710049PR China School of Materials Science and Engineering Changan UniversityNo.75 ChanganMiddle RoadXi'an710064PR China

The need for high-performance and cost-effective gas sensors in industrial and domestic settings has led to ad-vancements in gas sensors based on metal-organic frameworks(MOFs).However,challenges remain in the design and synthesis of MOFs with customized structure and affinity toward targeted gases and their integration onto miniaturized electronic *** deliberate design of MOFs with desired characteristics is hindered by limited understanding of the interactions between MOFs and ***,there is a lack of customization of relevant MOF-based sensors with salient sensing performance and their integration into sensor arrays to align with different application *** combination of machine learning or artificial intelligence(AI)with gas sensors also represents a promising avenue for future ***,we provide a mini-review of recent ac-complishments in MOF-based gas sensors,covering materials design and device *** challenges of miniaturization and building smart sensing systems with anomaly detection,self-calibration,and lifetime pre-diction are also discussed.

关键词： MOFs Gas sensors Integration approach Sensing performance

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Triazine-based multicomponent metallacages with tunable structures for SO_(2) selective capture and conversion

Aggregate

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Aggregate 2024年第1期5卷 270-279页

作者： Ruoqian zhang Dingyue Hu Yu Fu Qian Feng Chaoqun Mu Kai Gao Heping Ma Ming Liu mingming zhang State Key Laboratory for Mechanical Behavior of Materials Shaanxi International Research Center for Soft MatterSchool of Materials Science and EngineeringXi’an Jiaotong UniversityXi’anP.R.China Department of Chemistry Hangzhou Global Scientific and Technological Innovation Center(HIC)Zhejiang UniversityHangzhouP.R.China School of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’anP.R.China

The design of novel materials for sulfur dioxide(SO_(2))capture and conversion with considerable efficiency under mild conditions is of great significance for human health and environmental protection yet highly ***,we report a series of triazine-based multicomponent metallacages via coordination-driven self-assembly of 2,4,6-tri(4-pyridyl)-1,3,5-triazine,cis-Pt(PEt3)2(OTf)2 and different tetracarboxylic *** the increase of the length of the tetracarboxylates,the structures of the metallacages change from pyramids to extended *** to their N-rich structure,these metallacages are further used for selective SO_(2)capture,showing good adsorption capacity and remarkable SO_(2)/CO_(2)selectivity in ambient conditions,suggesting their potential applications toward real flue gas *** metallacages are further employed for the conversion of SO_(2)into value-added compounds,showing exceptional efficiency even dilute SO_(2)is used as the *** study represents a type of structure-tunable triazinebased metallacages for SO_(2)capture and conversion,which will pave the way on the applications of metal-organic complexes for gas adsorption.

关键词： multicomponent metallacages self-assembly SO_(2) adsorption SO_(2) conversion tunable structures

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Xia Boyu:The Chinese Hero Who Climbed Mount Qomolangma Without Legs

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China Book International 2024年第5期 126-128页

作者： Zheng Yuhuang zhang mingming Tsinghua University World Marketing Hall of Fame in China Beijing Institute of Technology Macao University of Science and Technology

This book not only covers the essence of the author’s more than 20 years of self-control research but also includes the main research results in the field of global self-control in the past few decades,introduces the scientific principles behind self-control in detail,and provides scientific and effective self-control improvement strategies and a large number of vivid and interesting self-control improvement *** book is an easy-to-understand book for people who want to learn about self-control,and improve self-control.

关键词： Mount Who principles

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Consensus linkage map construction and QTL mapping for eight yield-related traits in wheat using the BAAFS Wheat 90K SNP array

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Journal of Integrative Agriculture 2024年第11期23卷 3641-3656页

作者： Lihua Liu Pingping Qu Yue Zhou Hongbo Li Yangna Liu mingming zhang Liping zhang Changping Zhao Shengquan zhang Binshuang Pang Institute of Hybrid Wheat Beijing Academy of Agriculture and Forestry Sciences The Municipal Key Laboratory of Molecular Genetic of Hybrid Wheat Beijing Academy of Agriculture and Forestry Sciences Key Laboratory of Crop DNA Fingerprinting Innovation and Utilization (Co-construction by Ministry and Province) Ministry of Agriculture and Rural Affairs

Identifying stable quantitative trait loci （QTLs） for yield-related traits across populations and environments is crucial for wheat breeding and genetic *** maps also play important roles in wheat genetic and genomic *** the present study,a wheat consensus map was constructed using a doubled haploid （DH） population derived from Jinghua 1×Xiaobaidongmai （JX）,an F2population derived from L43×Shanxibaimai （LS） and the BAAFS Wheat 90K SNP array single nucleotide polymorphism （SNP） array.A total of 44,503 SNP markers were mapped on the constructed consensus map,and they covered 5,437.92 cM across 21 *** consensus map showed high collinearity with the individual maps and the wheat reference genome IWGSC RefSeq *** data on eight yield-related traits were collected in the JX population,as well as the F2:3and F2:4populations of LS,in six,two and two environments,respectively,and those data were used for QTL *** composite interval mapping （ICIM） identified 32 environmentally stable QTLs for the eight yield-related *** them,four QTLs（***-4B,***-4B,***-4B,and ***-5A.3） were detected across mapping populations and environments,and nine stable QTLs （***-1D,***-2B,***-3D,***-3D,***-4B,***-5D,***-6A.1,***-6A,and ***-6D） are likely to be *** physical region of 17.25–44.91 Mb on chromosome 4B was associated with six yield-related traits,so it is an important region for wheat *** physical region around the dwarfing gene Rht24 contained QTLs for kernel length （KL）,kernel width （KW）,spike length （SL）,and thousand-grain weight （TGW）,which are either from a pleiotropic effect of Rht24 or closely linked *** the stable QTLs,254 promising candidate genes were *** them,TraesCS5A03G1264300,TraesCS1B03G0624000 and TraesCS6A03G0697000 are particularly noteworthy since their homologous genes have similar functions for th

关键词： consensus map QTL yield-related traits wheat ( Triticum aestivum L.)

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促进经济学发展的反思:当代数据的几个问题

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经济纵横 2024年第2期 23-30页

作者：蒋海曦张明明西南财经大学国际商学院四川成都611130 西南财经大学经济学院四川成都611130

当代数据是不同于传统数据的高层次、多网状的大数据。由于当代数据的重要性、历史性及发展性,其作为新的经济范畴,丰富了马克思主义政治经济学中的生产资料具体形式,促进了新消费资料的形成;在西方经济学理论的创新中,当代数据有望通... 详细信息

当代数据是不同于传统数据的高层次、多网状的大数据。由于当代数据的重要性、历史性及发展性,其作为新的经济范畴,丰富了马克思主义政治经济学中的生产资料具体形式,促进了新消费资料的形成;在西方经济学理论的创新中,当代数据有望通过改变其生产要素的内涵,从而重塑西方经济学的理论基础,引导其更好地反映客观实际。当代数据引发的理论与实践发展表明,要充分发挥当代数据在经济发展中的重要作用,为中国式现代化建设服务;基于数据这一关键生产要素,加快推进生产革命;跳出传统的西方经济学思维,利用当代数据现象形成的新规律推动社会主义市场经济健康发展;围绕当代数据形成的新现象、新特征,开辟马克思主义政治经济学的新境界。

关键词：当代数据生产要素西方经济学马克思主义政治经济学

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miR-224-5p调控PI3K/Akt/FoxO1轴抑制氧化应激减轻缺氧/复氧诱导的心肌细胞损伤

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南方医科大学学报 2024年第6期44卷 1173-1181页

作者：梁国新唐红悦郭畅张明明南京医科大学附属南京明基医院检验科江苏南京210000 华北理工大学研究生学院河北唐山063000 河北省人民医院临床医学研究中心河北省代谢病重点实验室河北石家庄050051 河北北方学院研究生学院河北张家口075132

目的探究miRNA-224-5p在缺氧/复氧(H/R)诱导心肌细胞损伤中的作用机制。方法收集160例急性心肌梗死(AMI)患者和80例健康体检者(HC)的血浆检测miRNA-224-5p及生化指标。H9c2细胞分为对照组(Control)、H/R组、H/R+miR-224-5pNC组、H/R+m... 详细信息

目的探究miRNA-224-5p在缺氧/复氧(H/R)诱导心肌细胞损伤中的作用机制。方法收集160例急性心肌梗死(AMI)患者和80例健康体检者(HC)的血浆检测miRNA-224-5p及生化指标。H9c2细胞分为对照组(Control)、H/R组、H/R+miR-224-5pNC组、H/R+miR-224-5p mimics组。噻唑蓝(MTT)检测细胞活力;试剂盒检测丙二醛(MDA)、超氧化物歧化酶2(SOD2)和乳酸脱氢酶(LDH);双荧光素酶报告基因实验验证miR-224-5p与PTEN的靶向关系;生物信息学方法对靶基因的潜在机制进行分析;qRT-PCR检测miRNA-224-5p mRNA表达;Western blotting检测PTEN、Bcl-2、Bax、Cleaved caspase-3、SOD2、p-PI3K/PI3K、p-Akt/Ak及p-FoxO1/FoxO1蛋白水平;流式细胞术检测细胞凋亡率。结果与HC组相比,AMI组的血糖、 C反应蛋白、CK、CK-MB和cTnI水平均显著高于对照组(P<0.05)。AMI组和H/R组miR-224-5p的表达低于对照组(P<0.05);心肌细胞活力呈缺氧/复氧时间依赖性减少;PTEN是miR-224-5p的靶基因;PI3K/Akt通路是最显著富集的通路;与Control组相比,H/R组SOD2的活性降低,LDH的活性和MDA的含量均上升,细胞凋亡率上升(P<0.05),细胞中p-PI3K、p-Akt、p-FoxO1、SOD2和Bcl-2蛋白表达水平均降低,PTEN、Bax和Cleaved caspase-3蛋白表达均升高(P<0.05);与H/R组比较,H/R+miR-224-5p mimics组SOD2的活性显著上升,LDH、MDA的水平和细胞凋亡率均显著降低(P<0.05),细胞中p-PI3K、p-Akt、p-FoxO1、SOD2和Bcl-2的表达均上调,PTEN、Bax和Cleaved caspase3蛋白表达水平均降低(P<0.05)。结论 miR-224-5p过表达通过PI3K/Akt/FoxO1轴上调抗氧化基因SOD2的表达,缓解H/R诱导的H9c2细胞的氧化应激,减少细胞凋亡。

关键词：缺氧/复氧微小RNA 氧化应激凋亡

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