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Cobalt doping amount determines dominant reactive species in peroxymonosulfate activation via porous carbon catalysts co-doped by cobalt and nitrogen

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Journal of Environmental Sciences 2024年第4期138卷 212-226页

作者： Xiang li limeng Wu Aiqin Zhang Shaohua Wu Yan lin chunping Yang Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong UniversityNanchang 330063China Academy of Environmental and Resource Sciences School of Environmental Science and EngineeringGuangdong University of Petrochemical TechnologyMaoming 525000China College of Environmental Science and Engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control(Hunan University)Ministry of EducationChangsha 410082China

Switching the reaction routes in peroxymonosulfate(PMS)-based advanced oxidation processes have attracted much attention but remain challenging.Herein,a series of Co-N/C catalysts with different compositions and structures were prepared by using bimetallic zeolitic imidazolate frameworks based on ZIF-8 and ZIF-67(x Zn/Co-ZIFs).Results show that Co doping amount could mediate the transformation of the activation pathway of PMS over CoN/C.When Co doping amount was less than 10%,the constructed x Co-N/C/PMS system(x≤10%)was singlet oxygen-dominated reaction;however further increasing Co doping amount would lead to the generation and coexistence of sulfate radicals and high-valent cobalt,besides singlet oxygen.Furthermore,the nitrogen-coordinated Co(Co-NX)sites could serve as main catalytically active sites to generate singlet oxygen.While excess Co doping amount caused the formation of Co nanoparticles from which leached Co ions were responsible for the generation of sulfate radicals and high-valent cobalt.Compared to undoped N/C,Co doping could significantly enhance the catalytic performance.The 0.5%Co-N/C could achieve the optimum degradation(0.488 min^(-1))and mineralization abilities(78.4%)of sulfamethoxazole among the investigated Co-N/C catalysts,which was superior to most of previously reported catalysts.In addition,the application prospects of the two systems in different environmental scenarios(pH,inorganic anions and natural organic matter)were assessed and showed different degradation behaviors.This study provides a strategy to regulate the reactive species in PMS-based advanced oxidation process.

关键词： Peroxymonosulfate Sulfate radical Singlet oxygen Cobalt Zeolitic imidazolate framework Advanced oxidation process

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Anti-inflammatory germacrane-type sesquiterpene lactones from Vernonia sylvatica

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Chinese Journal of Natural Medicines 2024年第6期22卷 568-576页

作者： WANG Min li Han HU Bintao TANG chunping XU Hui KE Changqiang XIE Zuoquan YE Yang YAO Sheng State Key Laboratory of Drug Research&Natural Products Research Center Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China University of Chinese Academy of Sciences Beijing 100049China School of life Science and Technology Shanghai Tech UniversityShanghai 201210China State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China Zhongshan Institute for Drug Discovery Shanghai Institute of Materia MedicaChinese Academy of SciencesZhongshan 528400China

Nine new germacranolides,sylvaticalides A−H(1-9),and three known analogues(10-12)were isolated from the aeri-al part of Vernonia sylvatica.Their structures were established using comprehensive spectroscopic analysis,including high-resolution electrospray ionization mass spectroscopy(HR-ESI-MS)and 1D and 2D nuclear magnetic resonance(NMR)spectra.Their absolute configurations were determined by X-ray diffraction experiments.The anti-inflammatory activities of all isolated compounds were as-sessed by evaluating their inhibitory effects on the nuclear factor kappa B(NF-κB)pathway,which was activated by lipopolysacchar-ide(LPS)-stimulated human THP1-Dual cells,and the interferon-stimulated gene(ISG)pathway,activated by STING agonist MSA-2 in the same cell model.Compounds 1,2 and 6 showed inhibitory effects on the NF-κB and ISG signaling pathways,with IC_(50)values ranging from 4.12 to 10.57μmol·L^(−1).

关键词： Vernonia sylvatica Germacrane-type sesquiterpene lactone Sylvaticalides A−H Anti-inflammatory NF-κB path-way ISG pathway

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Environmental monitoring and fuzzy synthetic evaluation of municipal solid waste transfer stations in Beijing in 2001-2006

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Journal of Environmental Sciences 2008年第8期20卷 998-1005页

作者： li, chunping li, Guoxue LUO, Yiming li, Yanfu HUANG, Jian College of Resource and Environment Science China Agriculture University Beijing 100094 China Beijing Solid Waste Administration Department Beijing 100067 China Institute of Desert Meteorology China Meteorological Administration Urumqi 830002 China

Transfer station(TS)is an integral part of present-day municipal solid waste(MSW)management systems.To provide information for the incorporation of waste facilities within the current integrated waste management system,the authors measured the existing environmental quality at five MSW TSs.Discharged wastewater,air,and noise were monitored and assayed at the five TSs in Beijing in 2001-2006 during rainy seasons(RSs)and dry seasons(DSs).Except Ammonia(NH_3)and hydrogen sulfide(H_2S),the analytical results of...

关键词： municipal solid waste（MSW） transfer stations（TSs） pollutant monitoring environmental quality fuzzy mathematics

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The Moderating Effect of Organizational Identification on Occupational Stress and Insomnia Among Nurses

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Journal of Clinical and Nursing Research 2024年第1期8卷 36-44页

作者： Jing Wang Haiyun Gai chunping Ni Juan Du Shanshan li Huihui Yu School of Nursing Shaanxi University of Chinese MedicineXianyang 712046Shaanxi ProvinceChina Medical School Xi’an Siyuan UniversityXi’an 710038Shaanxi ProvinceChina School of Nursing Xi’an Jiaotong UniversityXi’an 710048Shaanxi ProvinceChina Department of Nursing Air Force Medical UniversityXi’an 710032Shaanxi ProvinceChina

Objective:To explore the relationship between organizational identification,occupational stress,and insomnia among nurses and to analyze the moderating role of organizational identification between occupational stress and insomnia.Methods:Through stratified sampling,720 nurses working in a tertiary A-level hospital in Shandong Province from March to May 2021 were surveyed using an effort-reward imbalance questionnaire,an organizational identification questionnaire,and the Athens Insomnia scale.Results:Organizational identification was negatively correlated with occupational stress and insomnia(r_(1)=-0.121,P_(1)lieving occupational stress.

关键词： Nurse Occupational stress Insomnia Organizational identification Moderating effect

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ZnIn_(2)S_(4)基光催化剂的制备及改性研究进展

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材料导报 2024年第3期38卷 7-12页

作者：李冠琼梁海欧李春萍白杰内蒙古工业大学化工学院呼和浩特010051 内蒙古工业催化重点实验室呼和浩特010051

近年来,硫锌铟(ZnIn_(2)S_(4))作为层状结构的三元金属硫化物,是一种典型的可见光响应光催化剂,由于其无毒,易于合成,具有可调的带隙、较好的物理化学稳定性以及优异的光催化活性等一系列优势,一度被应用于光催化的不同领域。本文着眼于... 详细信息

近年来,硫锌铟(ZnIn_(2)S_(4))作为层状结构的三元金属硫化物,是一种典型的可见光响应光催化剂,由于其无毒,易于合成,具有可调的带隙、较好的物理化学稳定性以及优异的光催化活性等一系列优势,一度被应用于光催化的不同领域。本文着眼于ZnIn_(2)S_(4)的晶体结构和生长机理,综述了ZnIn_(2)S_(4)常用的制备工艺。此外,基于ZnIn_(2)S_(4)存在的弊端,总结了提高ZnIn_(2)S_(4)光催化性能的各种调控策略,包括形貌和结构工程、空位工程、掺杂工程以及半导体异质结的构建,并深入分析了不同调控方式对ZnIn_(2)S_(4)光催化性能增强的内在原因。最后,提出ZnIn_(2)S_(4)基光催化剂目前面临的挑战和未来的应用前景。

关键词： ZnIn_(2)S_(4) 制备工艺改性策略光催化

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网络舆情事件链演化分析

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上海理工大学学报 2024年第1期46卷 87-94页

作者：李仁德冯倩李瑜曹春萍上海理工大学图书馆上海200093

为防范舆情风险,分析网络舆情的细粒度演化,提出一种去冗余的衍生事件内容关联演化分析框架。通过文本挖掘技术从海量文本流中提取主要的衍生事件,将舆情内容压缩到人工可判读的数量级;利用词移距计算相邻两个时间片上的衍生事件相似度... 详细信息

为防范舆情风险,分析网络舆情的细粒度演化,提出一种去冗余的衍生事件内容关联演化分析框架。通过文本挖掘技术从海量文本流中提取主要的衍生事件,将舆情内容压缩到人工可判读的数量级;利用词移距计算相邻两个时间片上的衍生事件相似度,构建反映演化关系的衍生事件链图。以“上海特斯拉自燃”事件为例进行事件链演化分析,得到微博网络舆情事件发展不同阶段涉事主体在各个衍生事件中的话题转移关系,最后鲁棒性分析的结果验证了该分析方法具有降低微博短文本冗余信息的能力,提高了事件演化关联识别分析的准确性。该研究方法为舆情事件的事后复盘、同类舆情事件的预判和介入、衍生事件的科学研判提供了决策支持。

关键词：事件链舆情演化网络舆情特斯拉自燃

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Enhanced Charge Separation of a-Bi2O3-BiOI Hollow Nanotube for Photodegradation Antibiotic Under Visible light

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Chemical Research in Chinese Universities 2020年第6期36卷 1227-1233页

作者： ZHANG Pengfei liU Huan liANG Haiou BAI Jie li chunping Chemical Engineering College Inner Mongolia University of TechnologyHohhot 010051P.R.China Inner Mongolia Key Laboratory of Industrial Catalysis Hohhot 010051P.R.China

It is highly desirable to exploit semiconductor materials with high photocatalytic degradation activity,es-pecially bismuth oxyhalide semiconductor photocatalysts with special layered structure and suitable bandgap width.The low utilization rate of visible light and high recombination rate of photogenerated electron-hole of BiOl photo catalyst severely restrict its development.Herein,a heterojunction photocatalyst of a-Bi2O3-BiOI hollow nanotube was prepared by electrospinning method,solvothermal method and ion-exchange method.The a-Bi2O3-BiOI(BB-4 the stirring time of Bi2O3 in KI solution was 4 h)exhibited the best photocatalytic performance towards degrading the tetracycline hydrochloride(TC)solution,which could remove 85%of TC(10 mg/L)in 2 h under visible light irradia-tion.The estimated hrc of a-BiO-BiOI(BB-4)was ca.3.9 and 1.8 times as much as that of a-Bi2O3 and pure BiOI respectively.It indicated that the formation of a-BizO3-BiOl heterojunction can significantly improve the separatior efficiency of photogenerated electron-hole pairs,therefore the photocatalytic ability was enhanced.Furthermore,a corresponding photocatalytic mechanism was proposed that Oz radical and holes are the main active components in the photodegradation through trapping experiment.

关键词： BiOI Bi2O3 Heterojunction Electrons-holes separation Photodegradation

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数字技术体育应用场景理论创新的演进轨迹及其实践

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福建师范大学学报（自然科学版） 2024年第2期40卷 169-176页

作者：陈椿萍李碧珍福建师范大学经济学院福建福州350117 福建师范大学协和学院福建福州350117

数字技术融合发展,用户需求纷繁复杂,面对经济社会耦合发展趋势,应用场景创新凭借其独特优势,正在成为技术创新和经济发展的新引擎。以创新理论为基础,系统梳理发展轨迹和实践活动,依据技术、需求和成果转化逻辑3因素对体育应用场景创... 详细信息

数字技术融合发展,用户需求纷繁复杂,面对经济社会耦合发展趋势,应用场景创新凭借其独特优势,正在成为技术创新和经济发展的新引擎。以创新理论为基础,系统梳理发展轨迹和实践活动,依据技术、需求和成果转化逻辑3因素对体育应用场景创新进行剖析,找出不同时期的体育应用场景创新特征与演进逻辑。研究得出体育应用场景呈现由技术单核驱动向技术需求双核驱动的进阶式创新发展轨迹,完成由“突破性创新”向“整合式创新”的跃迁。结合杭州亚运会实例,提出推进以用户为核心的“技术+场景”双道并行、强化场景与主体多元协同的开放式顶层设计和建立场景治理机制的建议。研究以实践为基,理论为终,促进应用场景创新由实践到理论的延伸与丰富,助力推动体育应用场景创新实践健康有序发展。

关键词：体育应用场景创新演进轨迹杭州亚运会

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Photochemical fixation and reduction of sulfur dioxide to sulfide by tetraphenylporphyrin magnesium:Spectroscopic and kinetic studies

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Science China Chemistry 2012年第9期55卷 1881-1886页

作者： ZHANG JianBin li chunping HUO TianRui li Qiang ZHANG Tong WEI XiongHui College of Chemical Engineering Inner Mongolia University of TechnologyHuhhot 010051China Department of Applied Chemistry College of Chemistry&Molecular EngineeringPeking UniversityBeijing 100871China

The photochemical reaction of sulfur dioxide(SO2) with tetraphenylporphyrin magnesium(MgTPP) has been investigated in dichloromethane(CH2Cl2) solution at room temperature with illumination by visible light.Conventional fluorescence,UV-vis,and MS spectral analyses showed that under these conditions,SO2 was initially photochemically fixed by MgTPP to form a 1:1 molecular adduct.On continued irradiation and maintaining the flow of SO2,MS and XRD results showed that MgTPP is remarkably effective in the photochemical reduction of SO2 to sulfide(S2).The kinetics of the photochemical reaction of MgTPP with SO2 was studied in a SO2-saturated solution.Under irradiation,the reaction follows pseudo first order kinetics for MgTPP,having a half-life decreasing from 106 to 57 min as the illumination intensity is increased from 350 to 600 Lm.This investigation of the photochemical fixation and reduction of SO2 by MgTPP is of key interest in elucidating fundamental photochemical reaction mechanisms associated with porphyrins in the presence of SO2 ;furthermore,the analysis of the photochemical reaction may offer new opportunities for the fixation and reduction of SO2 to less harmful species.

关键词：四苯基卟啉一级动力学二氧化硫化学固定硫化物光谱学光化学反应镁

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中国小说的文化身份及其使命

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安康学院学报 2024年第3期36卷 1-5页

作者：李春平安康学院文学与传媒学院陕西安康725000

小说发展的动力来自两个方面,一是内部动力即作者的言志之欲,二是外部动力即群众的阅读需求。文章在汉文化语境下探讨了中国小说文化身份从最初生成到全面建构的历史演进过程。中国小说从概念提出到文化身份确立,走过了两千多年的岁月,... 详细信息

小说发展的动力来自两个方面,一是内部动力即作者的言志之欲,二是外部动力即群众的阅读需求。文章在汉文化语境下探讨了中国小说文化身份从最初生成到全面建构的历史演进过程。中国小说从概念提出到文化身份确立,走过了两千多年的岁月,是在人民的哺育和社会的滋养下成长壮大的。中华民族文化基因绵延不衰,决定了中国小说文化身份的稳定性。无论中国现当代小说家怎样从西方文学中借鉴新的表现手法,无论进行哪种形式的文本实验,只要是用汉字写作,就永远改变不了中国小说的纯正血统。

关键词：中国小说文化身份使命

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