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Highly sensitive fluorescent sensing and photocatalytic degradation performance of two-dimensional Tb-organic network

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Journal of Rare Earths 2024年第2期42卷 303-313,I0003页

作者： Ting Gao Zhihu Ma Yixia ren Zhixiang Wang Meili Zhang xiaoli Chen Jijiang Wang Laboratory of New Energy and New Function Materials Shaanxi Key Laboratory of Chemical Reaction EngineeringCollege of Chemistry and Chemical EngineeringYan'an UniversityYan'an716000China

A novel tetra-nuclear Tb-organic network,named as [Tb_(4)(2-pyia)_(6)(HAc)_(0.5)(2,2'-bipy)(H_(2)O)_(4.5)]·2,2'-bipy·H_(2)O(1),was synthesized hydrothermally based on 5-(pyridin-2-ylmethoxy) isophthalic acid(H_(2)pyia) and 2,2'-bipyridine(2,2'-bipy) ligands,and characterized by single crystal X-ray diffraction,thermogravimetric(TG) analyses,powder X-ray diffraction(PXRD) and infrared(IR) technology.1 possesses a two-dimensional network based on the tetra-nuclear inorganic building units,and the π-πstacking interactions between the pyia^(2-) ligands and the guest 2,2'-bipy molecules play an important role in the forming of 3D supramolecular structure.1 exhibits excellent fluorescent sensing performance for Fe^(3+)(1.26×10^(-8) mol/L),Cr_(2)O_(7)^(2-)(8.1×10^(-7) mol/L),2,4,6-trinitrophenol(TNP)(2.71×10^(-8) mol/L)and tetracycline(TCT)(2.76×10^(-7) mol/L) in aqueous solution with lower detection concentrations.The sensing mechanisms of 1 were investigated by density functional theory(DFT) calculations,ultraviolet-visible(UV-Vis) diffuse reflectance spectroscopy,PXRD and fluorescent lifetime analyses.The activated product of 1 was prepared by heating at 255℃ under constant pressure and used to photo-catalytically degrade TCT.Both 1 and the activated one have good photocatalytic degradation performance for TCT with degradation rates of 84.29% and 96.07%,respectively.The photocatalytic mechanisms were discovered by UV-Vis diffuse reflectance spectroscopy and radical trap experiments.The Tb-organic framework might be an excellent multifunctional fluorescent sensor and a good photocatalytic agent for TCT degradation in the future.

关键词： Tb-organic network Fluorescent sensing Photocatalytic degradation Rare earths

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What control the spatial patterns and predictions of runoff response over the contiguous USA?

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Journal of Geographical Sciences 2024年第7期34卷 1297-1322页

作者： JIANG Shanhu DU Shuping ren Liliang GONG Xinglong YAN Denghua YUAN Shanshui LIU Yi YANG xiaoli XU Chongyu The National Key Laboratory of Water Disaster Prevention Hohai University College of Hydrology and Water Resources Hohai University School of Water Conservancy&Civil Engineering Northeast Agricultural University Department of Water Resources China Institute of Water Resources and Hydropower Research Department of Geosciences University of Oslo

Understanding the nonlinear relationship between hydrological response and key factors and the cause behind this relationship is vital for water resource management and earth system model. In this study, we undertook several steps to explore the relationship. Initially, we partitioned runoff response change(RRC) into multiple components associated with climate and catchment properties, and examined the spatial patterns and smoothness indicated by the Moran's Index of RRC across the contiguous United States(CONUS). Subsequently, we employed a machine learning model to predict RRC using catchment attribute predictors encompassing climate, topography, hydrology, soil, land use/cover, and geology. Additionally, we identified the primary factors influencing RRC and quantified how these key factors control RRC by employing the accumulated local effect, which allows for the representation of not only dominant but also secondary effects. Finally, we explored the relationship between ecoregion patterns, climate gradients, and the distribution of RRC across CONUS. Our findings indicate that:(1) RRC demonstrating significant connections between catchments tends to be well predicted by catchment attributes in space;(2) climate, hydrology, and topography emerge as the top three key attributes nonlinearly influencing the RRC patterns, with their second-order effects determining the heterogeneous patterns of RRC; and(3) local Moran's I signifies a collaborative relationship between the patterns of RRC and their spatial smoothness, climate space, and ecoregions.

关键词： hydrological response prediction machine learning accumulated local effect Moran’s Index large-sample study

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Effect of Sodium Chloride on Enhanced Performance of Chitosan-Based Ion Actuator

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Journal of Harbin Institute of Technology(New series) 2024年

作者： Zhaoyang Cui xiaoli Zhao Weikun Jia Yueming ren Yan Xu Yanzhuo Lv College of Mechanical and Electrical Engineering Harbin Engineering University College of Material Science and Chemical Engineering Harbin Engineering University

In this work， an actuate membrane and an electrode membrane were prepared by a sol-gel method. And then， they were physically pressed to form a chitosan-based ion actuator (CSIA). Importantly， the effect of sodium chloride on CSIA were investigated， the mechanical properties of CSIA were tested by establishing an output force test platform and a displacement test platform while testing its porosity. And， the electrochemical performance was tested by electrochemical workstation. At the end， the surface morphology and functional groups were measured by scanning electron microscopy and Infrared spectrogram， respectively. The results indicated that the molar concentration of the sodium chloride was the best at 0.06836 mol·L-1for CSIA. Its mechanical properties could reach an output force of 2.939 mN and a deflection displacement of 4.025 mm， and the maximum porosity of 12.98% at the same time. The specific capacitance of the electrochemical performance was up to 0.07719 F·g-1， and the minimum resistance reached 13.48 Ω. From the surface morphology and functional groups， the appropriate doping ratio of NaCl into CSIA was helpful for increasing the transport space of internal ions. The effective internal ion concentration and significantly reduced internal stress provided excellent performances under the appropriate voltage conditions. The doping of inorganic ion sodium chloride improved the internal electron transport efficiency of chitosan ion actuator， and it advanced the mechanical properties of the actuator. Hence the enhancement of NaCl output force in CSIA had a good significance for the development of inorganic salt ion strengthened ion actuator.

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Understanding the spatial representativeness of air quality monitoring network and its application to PM_(2.5)in the China's Mainland

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Geoscience Frontiers 2022年第3期13卷 130-138页

作者： Ling Su Chanchan Gao xiaoli ren Fengying Zhang Shanshan Cao Shiqing Zhang Tida Chen Mengqing Liu Bingchuan Ni Min Liu Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration School of Ecological and Environmental SciencesEast China Normal UniversityShanghai 200241China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Graduate University of Chinese Academy of Sciences Beijing 100049China China National Environmental Monitoring Centre Beijing 100012China Institute of Eco-Chongming Shanghai 200241China

Air pollution has seriously endangered human health and the natural ecosystem during the last decades.Air quality monitoring stations(AQMS)have played a critical role in providing valuable data sets for recording regional air pollutants.The spatial representativeness of AQMS is a critical parameter when choosing the location of stations and assessing effects on the population to long-term exposure to air pollution.In this paper,we proposed a methodological framework for assessing the spatial representativeness of the regional air quality monitoring network and applied it to ground-based PM_(2.5)observation in the mainland of China.Weighted multidimensional Euclidean distance between each pixel and the stations was used to determine the representativeness of the existing monitoring network.In addition,the K-means clustering method was adopted to improve the spatial representativeness of the existing AQMS.The results showed that there were obvious differences among the representative area of 1820 stations in the mainland of China.The monitoring stations could well represent the PM_(2.5)spatial distribution of the entire region,and the effectively represented area(i.***.the area where the Euclidean distance between the pixels and the stations was lower than the average value)accounted for 67.32%of the total area and covered 93.12%of the population.Forty additional stations were identified in the Northwest,North China,and Northeast regions,which could improve the spatial representativeness by 14.31%.

关键词： PM_(2.5) Euclidean distance Spatial representativeness China

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Degradation analysis of A^2/O combined with AgNO3 + K2FeO4 on coking wastewater

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Chinese Journal of Chemical Engineering 2018年第7期26卷 1555-1560页

作者： Pengyu Zhu Kaijin Zhu Rob Puzey xiaoli ren School of Engineering University of HullCottingham RoadHullthe United Kingdom Department of Environmental Engineering Taiyuan Institute of TechnologyTaiyuan 030008China

In this work, a coking wastewater was selected and a biochemical A^2/O treatment device for fractional degradation was designed and employed. After each stage of the treatment, the products were analyzed through gas chromatography–mass spectroscopy(GC–MS) to determine their composition. Finally, AgNO_3+ K_2 FeO_4 was used as an advanced deep catalytic oxidation treatment. It was concluded from the analysis that cyclic organics could be degraded and the chemical oxygen demand(COD) was controlled within 50 mg·L^(-1), in line with the target value. Meanwhile, the spectra obtained from the GC–MS were in accordance with the conclusions reached based on the COD. The research results showed that all hard-degradable organics in coking wastewater could be eliminated through the A^2/O bio-membrane treatment and the advanced treatment of making use of K_2FeO_4 as an oxidant and Ag+as a catalyst, the catalytic efficiency with Ag+as a catalyst of K+2FeO_4 was very high. Agcould evidently improve the oxidation capacity of K_2FeO_4 to wastewater in its short stability time, and this is an important innovation.

关键词： K2FeO4 AgNO3 废水级分生物化学催化剂氧化处理 GCMS

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Fine mapping and validation of a stable QTL for thousand-kernel weight in wheat(Triticum aestivum L.)

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作物学报:英文版 2023年第5期11卷 1491-1500页

作者： Deyuan Meng Aamana Batool Yazhou Xuan Ruiqing Pan Na Zhang Wei Zhang Liya Zhi xiaoli ren Wenqing Li Jijie Li Yanxiao Niu Shuzhi Zheng Jun Ji xiaoli Shi Lei Wang Hongqing Ling Chunhua Zhao Fa Cui Xigang Liu Junming Li Liqiang Song Center for Agricultural Resources Research Institute of Genetics and Developmental BiologyThe Innovative Academy of Seed DesignChinese Academy of SciencesShijiazhuang 050022HebeiChina Ministry of Education Key Laboratory of Molecular and Cellular Biology Hebei Research Center of the Basic Discipline of Cell BiologyHebei Key Laboratory of Molecular and Cellular BiologyCollege of Life SciencesHebei Normal UniversityShijiazhuang 050024HebeiChina State Key Laboratory of North China Crop Improvement and Regulation College of AgronomyHebei Agricultural UniversityBaoding 071000HebeiChina State Key Laboratory of Plant Cell and Chromosome Engineering Chinese Academy of SciencesBeijing 100101China Key Laboratory of Molecular Module-Based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong School of AgricultureLudong UniversityYantai 264025ShandongChina Hebei Collaboration Innovation Center for Cell Signaling Shijiazhuang 050024HebeiChina College of Life Science University of Chinese Academy of SciencesBeijing 100049China

Thousand-kernel weight(TKW)is a measure of grain weight,a target of wheat breeding.The object of this study was to fine-map a stable quantitative trait loci(QTL)for TKW and identify its candidate gene in a recombinant inbred line(RIL)population derived from the cross of Kenong 9204(KN9204)and Jing411(J411).On a high-density genetic linkage map,24,26 and 25 QTL were associated with TKW,kernel length(KL),and kernel width(KW),respectively.A major and stable QTL,QTkw-2D,was mapped to an8.3 cM interval on chromosome arm 2DL.By saturation of polymorphic markers in its target region,QTkw-2D was confined to a 9.13 Mb physical interval using a secondary mapping population derived from a residually heterozygous line(F6:7).This interval was further narrowed to 2.52 Mb using QTkw-2D near-isogenic lines(NILs).NILs~(KN9204)had higher fresh and dry weights than NILsJ411at various grain-filling stages.The TKW and KW of NILs~(KN9204)were much higher than those of NILsJ411in field trials.By comparison of both DNA sequence and expression between KN9204 and J411,TraesCS2D02G460300.1(TraesKN2D01HG49350)was assigned as a candidate gene for QTkw-2D.This was confirmed by RNA sequencing(RNA-seq)of QTkw-2D NILs.These results provide the basis of map-based cloning of QTkw-2D,and DNA markers linked to the candidate gene may be used in marker-assisted selection.

关键词： Wheat Thousand-kernel weight Fine mapping Candidate gene

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井下运煤车车载称重技术研究

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矿山机械 2024年第2期52卷 72-74页

作者：任晓力中国煤炭科工集团太原研究院有限公司山西太原030006

运煤车是煤矿井下短距离运输的主要设备,井下工人在装载时为了追求短期效益,多拉快跑,导致车辆由于长期超载运行,降低了车辆的使用寿命,带来安全风险和隐患。车辆超载、频繁制动会影响传动轴和减速器的可靠性和使用寿命,承载超过了轮胎... 详细信息

运煤车是煤矿井下短距离运输的主要设备,井下工人在装载时为了追求短期效益,多拉快跑,导致车辆由于长期超载运行,降低了车辆的使用寿命,带来安全风险和隐患。车辆超载、频繁制动会影响传动轴和减速器的可靠性和使用寿命,承载超过了轮胎的额定承载能力,使得轮胎磨损严重,对转向系统也有一定影响,超载后转向阻力增大,转向机构受力增加,重心偏移,在车辆在转弯过程中,导致离心力影响车轮的受力,使得车辆的操作性变差,影响车辆行驶的安全[1-2]。

关键词：频繁制动转向机构转向系统轮胎磨损车辆超载超载运行井下工人重心偏移

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