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Tuning electrochemical water activation over NiIr single-atom alloy aerogels for stable electrochemiluminescence

Science Bulletin 2024年第15期69卷 2387-2394页

作者： Ling Ling Mengzhen Xi hengjia wang Runshi Xiao Lirong Zheng Liuyong Hu Wenling Gu Chengzhou Zhu State Key Laboratory of Green Pesticide International Joint Research Center for Intelligent Biosensing Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079China Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Hubei Engineering Technology Research Center of Optoelectronic and New Energy MaterialsWuhan Institute of TechnologyWuhan 430205China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

The anodic oxygen evolution reaction is a well-acknowledged side reaction in traditional aqueous electrochemiluminescence(ECL) systems due to the generation and surface aggregation of oxygen at the electrode, which detrimentally impacts the stability and efficiency of ECL emission. However, the effect of reactive oxygen species generated during water oxidation on ECL luminophores has been largely overlooked. Taking the typical luminol emitter as an example, herein, we employed NiIr single-atom alloy aerogels possessing efficient water oxidation activity as a prototype co-reaction accelerator to elucidate the relationship between ECL behavior and water oxidation reaction kinetics for the first time. By regulating the concentration of hydroxide ions in the electrolyte, the electrochemical oxidation processes of both luminol and water are finely tuned. When the concentration of hydroxide ions in electrolyte is low,the kinetics of water oxidation is attenuated, which limits the generation of oxygen, effectively mitigates the influence of oxygen accumulation on the ECL strength, and offers a novel perspective for harnessing side reactions in ECL systems. Finally, a sensitive and stable sensor for antioxidant detection was constructed and applied to the practical sample detection.

关键词： Electrochemiluminescence Luminol Water activation Single-atom doping Sensing

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近20年北京市地表水环境演变趋势及驱动因子研究

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陕西水利 2024年第5期 1-3,7页

作者：汪梦琦李亚翠王恒嘉林杨费颖涵首都师范大学资源环境与旅游学院北京100048 北京市生态环境保护科学研究院北京100037 国家城市环境污染控制工程技术研究中心北京100037

根据历年环境监测数据,对近20年北京市地表水环境质量时空演变特征进行探讨;从人口规模增长、产业结构调整、用水结构变化等3个方面阐明影响北京市水环境质量的重要驱动力因子,据此提出若干调控措施,旨在为未来北京市地表水环境治理提... 详细信息

根据历年环境监测数据,对近20年北京市地表水环境质量时空演变特征进行探讨;从人口规模增长、产业结构调整、用水结构变化等3个方面阐明影响北京市水环境质量的重要驱动力因子,据此提出若干调控措施,旨在为未来北京市地表水环境治理提供理论依据与技术支持。

关键词：地表水环境演变趋势驱动因子北京市

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Single-atom nanozymes with axial ligand-induced self-adaptive conformation in alkaline medium boost chemiluminescence

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Science China Chemistry 2023年第3期66卷 904-912页

作者： Zhen Luo Liliang Tian hengjia wang Zhichao Wu Xin Luo Xiaosi wang Lei Jiao Xiaoqian Wei Ying Qin Lirong Zheng Liuyong Hu Wenling Gu Le Shi Chengzhou Zhu Key Laboratory of Pesticides and Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensing Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079China State Key Laboratory of Electrical Insulation and Power Equipment Centre of Nanomaterials for Renewable EnergySchool of Electrical EngineeringXi’an Jiaotong UniversityXi’an 710049China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Hubei Engineering Technology Research Center of Optoelectronic and New Energy MaterialsWuhan Institute of TechnologyWuhan 430205China Fujian Shuikou Power Generation Group Corp. Fuzhou 350000China

Mimicking the structure of natural enzymes for designing advanced alternatives provides great opportunities to address the bottleneck of enzyme-involved chemiluminescence(CL). Herein, according to theoretical calculations, we found that an endogenous axial ligand of M-N-C single-atom nanozymes(SAzymes), originating from OH-spontaneously bonding to the metal center in an alkaline medium, can self-adaptively change its strength to facilitate intermediate steps. Furthermore, the lowest energy barrier of the rate-determining step and the strongest affinity and fastest electron transfer with luminol anion endow CoN-C with the highest peroxidase-like activity. Guided by the theoretical calculations, a series of M-N-C SAzymes(M=Fe, Co,Ni) were synthesized to boost CL, where Co-N-C SAzymes with superior catalytic activity and high selective generation of O_(2)·- were validated. As a proof-of-concept, Co-N-C SAzymes were employed for sensitive detection of acetylcholinesterase and organophosphorus pesticide.

关键词： single-atom nanozymes chemiluminescence hydrogen peroxide activation biosensing

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Secondary-Atom-Doping Enables Robust Fe-N-C Single-Atom Catalysts with Enhanced Oxygen Reduction Reaction

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Nano-Micro Letters 2020年第11期12卷 281-291页

作者： Xin Luo Xiaoqian Wei hengjia wang Wenling Gu Takuma Kaneko Yusuke Yoshida Xiao Zhao Chengzhou Zhu Key Laboratory of Pesticide and Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensing Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079People’s Republic of China Innovation Research Center for Fuel Cells The University of Electro-CommunicationsChofugaokaChofuTokyo 182‑8585Japan

Single-atom catalysts(SACs) with nitrogen-coordinated nonprecious metal sites have exhibited inimitable advantages in ***,a large room for improving their activity and durability ***,we construct atomically dispersed Fe sites in N-doped carbon supports by secondary-atom-doped *** the secondary doping,the density and coordination environment of active sites can be efficiently tuned,enabling the simultaneous improvement in the number and reactivity of the active ***,structure optimizations in terms of the enlarged surface area and improved hydrophilicity can be achieved *** to the beneficial microstructure and abundant highly active FeN_5 moieties resulting from the secondary doping,the resultant catalyst exhibits an admirable half-wave potential of 0.81 V versus 0.83 V for Pt/C and much better stability than Pt/C in acidic *** work would offer a general strategy for the design and preparation of highly active SACs for electrochemical energy devices.

关键词： Single-atom catalysts Fe-N-C catalysts Doping Porous nanostructures Oxygen reduction reaction

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Phytochrome B interacts with LIGULELESS1 to control plant architecture and density tolerance in maize

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Molecular Plant 2024年第8期17卷 1255-1271页

作者： Qingbiao Shi Ying Xia Qibin wang Kaiwen Lv hengjia Yang Lianzhe Cui Yue Sun Xiaofei wang Qing Tao Xiehai Song Di Xu Wenchang Xu Xingyun wang Xianglan wang Fanying Kong Haisen Zhang Bosheng Li Pinghua Li Haiyang wang Gang Li State Key Laboratory of Wheat Improvement College of Life SciencesShandong Agricultural UniversityTai'an 271018China State Key Laboratory of Wheat Improvement College of AgronomyShandong Agricultural UniversityTai'an 271018China Peking University Institute of Advanced Agricultural Sciences Shandong Laboratory of Advanced Agricultural Sciences at WeifangWeifangShandong 261000China Guandong Laboratory for Lingnan Modern Agriculture State Key Laboratory for Conservation and Utilization of Subtropical Agro-BioresourcesSouth China Agricultural UniversityGuangzhou510642China

Over the past few decades,significant improvements in maize yield have been largely attributed to increased plant density of upright hybrid varieties rather than increased yield per ***,dense planting triggers shade avoidance responses(SARs)that optimize light absorption but impair plant vigor and performance,limiting yield improvement through increasing plant *** this study,we demonstrated that high-density-induced leaf angle narrowing and stem/stalk elongation are largely dependent on phytochrome B(phyB1/B2),the primaryphotoreceptor responsible for perceiving red(R)and far-red(FR)light in *** found that maize phyB physically interacts with the LIGULELESS1(LG1),a classical key regulator of leaf angle,to coordinately regulate plant architecture and density *** abundance of LG1 is significantly increased by phyB under high R:FR light(low density)but rapidly decreases under low R:FR light(high density),correlating with variations in leaf angle and plant height under various *** addition,we identified the homeobox transcription factor HB53 as a target co-repressed by both phyB and LG1 but rapidly induced by canopy *** and cellular analyses showed that HB53 regulates plant architecture by controlling the elongation and division of ligular adaxial and abaxial *** together,these findings uncover the phyB-LG1-HB53 regulatory module as a key molecular mechanism governing plant architecture and density tolerance,providing potential genetic targets for breeding maize hybrid varieties suitable for high-density planting.

关键词： maize phytochrome B LIGULELESS1 HB53 leaf angle density tolerance

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Histological and single-nucleus transcriptome analyses reveal the specialized functions of ligular sclerenchyma cells and key regulators of leaf angle in maize

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Molecular Plant 2024年第6期17卷 920-934页

作者： Qibin wang Qiuyue Guo Qingbiao Shi hengjia Yang Meiling Liu Yani Niu Shuxuan Quan Di Xu Xiaofeng Chen Laiyi Li Wenchang Xu Fanying Kong Haisen Zhang Pinghua Li Bosheng Li Gang Li State Key Laboratory of Wheat Improvement College of Life SciencesShandong Agricultural UniversityTai’an 271018China Peking University Institute of Advanced Agricultural Sciences Shandong Laboratory of Advanced Agriculture Sciences in WeifangWeifangShandong 261325China State Key Laboratory of Wheat Improvement College of AgronomyShandong Agricultural UniversityTai’an 271018China

Leaf angle(LA)is a crucial factor that affects planting density and yield in ***,the regulatory mechanisms underlying LA formation remain largely *** this study,we performed a comparative histological analysis of the ligular region across various maize inbred lines and revealed that LA is significantly influenced by a two-step regulatory process involving initial cell elongation followed by subsequent lignification in the ligular adaxial sclerenchyma cells(SCs).Subsequently,we performed both bulk and single-nucleus RNA sequencing,generated a comprehensive transcriptomic atlas of the ligular region,and identified numerous genes enriched in the hypodermal cells that may influence their specialization into ***,we functionally characterized two genes encoding atypical basic-helix-loop-helix(bHLH)transcription factors,bHLH30 and its homolog bHLH155,which are highly expressed in the elongated adaxial *** analyses revealed that bHLH30 and bHLH155 positively regulate LA expansion,and molecular experiments demonstrated their ability to activate the transcription of genes involved in cell elongation and lignification of *** findings highlight the specialized functions of ligular adaxial SCs in LA regulation by restricting further extension of ligular cells and enhancing mechanical *** transcriptomic atlas of the ligular region at single-nucleus resolution not only deepens our understanding of LA regulation but also enables identification of numerous potential targets for optimizing plant architecture in modern maize breeding.

关键词： planting specialized angle

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湿滑道面飞机牵引滑行系统纵向动力学建模与制动性能

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航空学报 2024年第16期45卷 124-139页

作者：祝恒佳齐凯王立文张威中国民航大学航空工程学院天津300300 中国民航航空地面特种设备研究基地天津300300 民航智慧机场理论与系统重点实验室天津300300 中国民航大学安全科学与工程学院天津300300 中国民航大学科技创新研究院天津300300

飞机地面作业可分为低速(小于6 kn)、中速(6~14 kn)、高速(大于14 kn)3类(1 kn=1.852 km/h),相比于传统的低速飞机牵引作业,新一代无杆飞机牵引滑行模式下牵引速度可达到40 km/h,道面湿滑对高速飞机牵引滑行系统制动性能的影响不可忽视... 详细信息

飞机地面作业可分为低速(小于6 kn)、中速(6~14 kn)、高速(大于14 kn)3类(1 kn=1.852 km/h),相比于传统的低速飞机牵引作业,新一代无杆飞机牵引滑行模式下牵引速度可达到40 km/h,道面湿滑对高速飞机牵引滑行系统制动性能的影响不可忽视。采用伪流动动压轴承作用等效反映轮胎-水膜-道面相互作用,结合任意压力分布函数提出LuGre轮胎滑水动力学模型。针对AM210无杆飞机牵引车轮胎开展湿路面附着性能试验,对LuGre轮胎滑水动力学模型进行参数辨识。基于MATLAB/Simulink和Adams/View建立LuGre轮胎滑水动力学模型和无杆牵引滑行系统的动力学联合仿真模型。采用模糊PID最优滑移率控制方法并考虑道面振动激励,对比研究了湿滑和干燥道面下飞机牵引系统的制动性能。结果表明,湿滑道面轮胎动载荷小于干燥道面,轮胎抓地性能随水膜厚度增大而降低,在40 km/h的初始制动速度下A级、C级1 mm水膜厚度道面的制动距离比干燥道面分别增加了30.9%、31.3%,对应工况下1 mm水膜厚度道面的制动距离比0.5 mm水膜厚度道面分别增加了2.7%、2.5%。研究结果可为湿滑道面工况下飞机牵引滑行作业中的制动安全预测提供理论基础。

关键词：无杆飞机牵引滑行系统无杆飞机牵引车湿滑道面轮胎动力学模型制动动力学

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流式细胞仪在水环境中的研究热点和应用——基于Cite Space知识图谱的分析

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海洋湖沼通报 2022年第4期44卷 145-153页

作者：安志强王永刚王旭王琦琳李亚翠王恒嘉首都师范大学资源环境与旅游学院北京100089 北京市生态环境保护科学研究院北京100037 国家城市环境污染控制工程技术研究中心北京100037 天津大学环境科学与工程学院天津300072

以2010—2020年Web of Science核心合集(WOS)和中国知网数据库(CNKI)中收录有关流式细胞仪在水环境中研究的文献,利用Cite Space软件进行可视化分析,通过对文献发表的时间分布、关键词、研究机构和代表作者等方面的分析,综述了流式细胞... 详细信息

以2010—2020年Web of Science核心合集(WOS)和中国知网数据库(CNKI)中收录有关流式细胞仪在水环境中研究的文献,利用Cite Space软件进行可视化分析,通过对文献发表的时间分布、关键词、研究机构和代表作者等方面的分析,综述了流式细胞仪在水环境中的研究热点和发展趋势。分析结果表明:(1)流式细胞仪在水环境中主要应用于浮游微生物的计数、群落结构分析和水质安全的预警等方面;(2)从发展趋势上看,近几年,国内外学者对流式细胞仪在水质安全监测中的研究热度上升较为显著,是当前乃至今后的研究热点和方向;(3)从整体水平上看,流式细胞仪在水环境中的应用还相对较少,研究机构和代表作者也有限,仍处于发展阶段。今后应加强流式细胞仪在水环境中的应用和探索,并针对仪器本身的不足进行改良。

关键词：流式细胞仪知识图谱文献计量分析 Cite Space 可视化分析

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水体中微塑料的采样、分离及分析技术研究进展

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海洋湖沼通报 2023年第4期45卷 167-175页

作者：林杨王永刚王旭安志强李亚翠王恒嘉首都师范大学资源环境与旅游学院北京100089 北京市生态环境保护科学研究院北京100037 国家城市环境污染控制工程技术研究中心北京100037 天津大学环境科学与工程学院天津300073

近年来,水体中的微塑料污染已经引起人类广泛关注。然而,目前水体中微塑料的分析检测还处于初级阶段,同种类型研究由于采用不同的方法导致可比性较低。如何准确、高效地采集、分离并鉴定样品中的微塑料是研究微塑料的关键前提。本文通... 详细信息

近年来,水体中的微塑料污染已经引起人类广泛关注。然而,目前水体中微塑料的分析检测还处于初级阶段,同种类型研究由于采用不同的方法导致可比性较低。如何准确、高效地采集、分离并鉴定样品中的微塑料是研究微塑料的关键前提。本文通过文献收集整理,对水、沉积物和水生生物体内微塑料的采样、分离及鉴定的主要方法进行了梳理,对其优缺点进行比较,指出每种方法最佳的使用条件,并对该领域的研究进行了展望,以期为水体中微塑料污染现状研究提供参考。

关键词：微塑料采样分离分析技术水体

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Theoretical and experimental investigations on single-atom catalysis:Pt1/FeOx for water-gas shift reaction Shan-Fei wang1,§,Yangyang Li2,3,§,Haiyan wang1,Jin-Xia Liang1(✉),Chun Zhu1

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Nano Research 2024年第9期17卷 8627-8637页

作者： Shan-Fei wang Yangyang Li Haiyan wang Jin-Xia Liang Chun Zhu Botao Qiao School of Chemistry and Chemical Engineering Guizhou UniversityGuiyang 550025China CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China

Oxide-supported metal single-atom catalysts(SACs)have exhibited excellent catalytic performance for water-gas shift(WGS)***,we report the single-atom catalyst Pt1/FeOx exhibits excellent medium temperature catalytic performance for WGS reactions by the density functional theory(DFT)calculations and experimental *** calculations indicate that H_(2)O molecules are easily dissociated at oxygen vacancies,and the formed*OH and*O are adsorbed on Pt1 single atoms and the adjacent O atoms,*** studying four possible reaction mechanisms,it is found that the optimal WGS reaction pathway is proceeded along the carboxyl mechanism(pathway III),in which the formation of*COOH intermediates can promote the stability of Pt1/FeOx SAC and the easier occurrence of WGS *** energy barrier of the rate-determining step during the entire reaction cycle is only 1.16 eV,showing the high activity for the medium temperature WGS reaction on Pt1/FeOx SAC,which was verified by experimental ***,the calculated turnover frequencies(TOFs)of CO_(2)and H_(2)formation on Pt1/FeOx at 610 K(337℃)can reach up to 1.14×10^(-3)s^(-1)·site^(-1)through carboxyl *** this work,we further expand the application potential of Pt1/FeOx SAC in WGS reaction.

关键词： water-gas shift(WGS)reaction single-atom catalyst(SAC) density functional theory(DFT) thermocatalysis

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