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The reconstruction of equal-mole bimetal organic framework to heterostructure for effective oxygen evolution reaction

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Journal of Materials Science & technology 2024年第36期203卷 118-125页

作者： Jinxia Yang Zhaoxia Hu Youlei Feng Zehua Zou Xiaoping Chen Qingxiang Wang Fujian Provincial Key Laboratory of Modern Analytical Science and Separation Technology Fujian Provincial Key Laboratory of Pollution Monitoring and ControlCollege of ChemistryChemical Engineering and EnvironmentMinnan Normal UniversityZhangzhou363000China

Oxygen evolution reaction(OER)is one of the most important issues for hydrogen production from water *** the OER process,electrochemical reconstruction is widely observed for the majority of electrocatalysts,which is strongly related to the formation and evolution of real active ***,bimetal metal-organic framework(MOF)with an equal ratio of Co and Fe sites is screened to exhibit the superior OER *** obvious reconstruction is observed to transform single MOF phase into the heterostructure composed of active CoOOH and ***,the generation of Co^(3+)species is more reliant on the blessing of electricity and electrolyte than that of Fe3+*** a result,the optimal electrocatalyst shows the overpotential of 267 mV at 10 mA/cm^(2)and ultra-low Tafel slope of 24.7 mV/dec with a stable OER performance.

关键词： Oxygen evolution reaction Metal-organic frameworks Reconstruction Heterostructure

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The Influence of Freezing Drizzle on Wire Icing during Freezing Fog Events

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Advances in Atmospheric Sciences 2013年第4期30卷 1053-1069页

作者：周悦牛生杰吕晶晶 Jiangsu Key Laboratory of Atmospheric Environmental Monitoring and Pollution Control School of Atmospheric Physics Nanjing University of Information Science and Technology Hubei Key Laboratory for Heavy Rain Monitoring and Warning Research Institute of Heavy Rain China Meteorological Administration

Both direct and indirect effects of freezing drizzle on ice accretion were analyzed for ten freezing drizzle events during a comprehensive ice thickness, fog, and precipitation observation campaign carried out during the winter of 2008 and 2009 at Enshi Radar Station （30°17′N, 109°16′E）, Hubei Province, China. The growth rate of ice thickness was 0.85 mm h-1 during the freezing drizzle period, while the rate was only 0：4 mm h-1 without sleet and freezing drizzle. The rain intensity, liquid water content （LWC）, and diameter of freezing drizzle stayed at low values. The development of microphysical properties of fog was suppressed in the freezing drizzle period. A threshold diameter （Dc） was proposed to estimate the influence of freezing drizzle on different size ranges of fog droplets. Fog droplets with a diameter less than Dc would be affected slightly by freezing drizzle, while larger fog droplets would be affected significantly. Dc had a correlation with the average rain intensity, with a correlation coefficient of 0.78. The relationships among the microphysical properties of fog droplets were all positive when the effect of freezing drizzle was weak, while they became poor positive correlations, or even negative correlations during freezing drizzle period. The direct contribution of freezing drizzle to ice thickness was about 14.5%. Considering both the direct and indirect effects, we suggest that freezing drizzle could act as a ＂catalyst＂ causing serious icing conditions.

关键词： freezing drizzle freezing fog ice accretion microphysical property promoting factor

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An Optimization Model for the Regional Freight Structure

An Optimization Model for the Regional Freight Structure

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2023 International Conference on Smart transportation and City Engineering, STCE 2023

作者： Song, Yuanyuan Wang, Renjie Liu, Shengqiang Wu, Rui Transport Planning and Research Institute Ministry of Transport Beijing100028 China Laboratory of Transport Pollution Control and Monitoring Technology Beijing100028 China Beijing Jiaotong University Beijing100044 China

ISBN: (纸本)9781510673540

transport structure adjustment is an important means for collaborative emission reduction of greenhouse gases and conventional pollutants. In this paper, for the regional freight structure optimization, a multimodal freight network is built, the transport utility function is analyzed, a model for multi-objective regional freight structure optimization is built, Beijing-Tianjin-Hebei region is taken as an example, and the factors (e.g., the freight demand in the future years, the policy orientation for freight development, the development scales of various freight modes in the future) are taken as the constraint conditions to determine the feasible region of freight structure, build a model for multi-objective freight structure optimization with the minimum carbon emission and the maximum transport utility, and obtain the optimal freight structure in the year of carbon peaking and carbon neutrality goals, thus providing feasible ideas and methods for the sustainable development of the transport system. © 2024 SPIE.

关键词： Multiobjective optimization

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Understand the local and regional contributions on air pollution from the view of human health impacts

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Frontiers of Environmental Science & Engineering 2021年第5期15卷 133-143页

作者： Yueqi Jiang Jia Xing Shuxiao Wang Xing Chang Shuchang Liu Aijun Shi Baoxian Liu Shovan Kumar Sahu State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084China Beijing Municipal Research Institute of Environment Protection Beijing100037China Beijing Key Laboratory of Airborne Particulate Matter Monitoring Technology Beijing Municipal Environmental Monitoring CenterBeijing100048China

The source-receptor matrix of PM_(2.5)concentration from local and regional sources in the Beijing-Tianjin-Hebei(BTH)and surrounding provinces has been created in previous ***,because the spatial distribution of concentration does not necessarily match with that of the population,such concentration-based source-receptor matrix may not fully reflect the importance of pollutant control effectiveness in reducing the PM_(2.5)-related health *** demonstrate that,we study the source-receptor matrix of the PM_(2.5)-related deaths instead,with inclusion of the spatial correlations between the concentrations and the *** advanced source apportionment numerical model combined with the integrated exposure-response functions is used for BTH and surrounding regions in *** observed that the relative contribution to PM_(2.5)-related deaths of local emissions was 0.75%to 20.77%larger than that of PM_(2.5)*** results address the importance of local emissions control for reducing health impacts of PM_(2.5)particularly for local *** of regional transport to PM_(2.5)-related deaths in rural area was 22%larger than that in urban area due to the spatial pattern of regional transport which was more related to the rural *** resulted in an environmental inequality in the sense that people staying in rural area with access to less educational resources are subjected to higher impacts from regional transport as compared with their more resourceful and knowledgeable urban *** unexpected benefit from the multi-regional joint controls is suggested for its effectiveness in reducing the regional transport of PM_(2.5)pollution thus mitigating the associated environmental inequality.

关键词： PM_(2.5) Regional transport Local emissions Health impact Environmental inequality

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Crystal Structure and Theoretical Energy Gap of 2-(2-((4-(Pyridin-2-yl)pyrimidin-2-yl)disulfanyl)pyrimidin-4-yl)pyridinium Hexafluorophosphate

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Chinese Journal of Structural Chemistry 2017年第2期36卷 229-235页

作者：陶涛赵煚珖曹晖 Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and Engineering Nanjing University of Information Science &Technology

The crystal structure of 2-（2-（（4-（pyridin-2-yl）pyrimidin-2-yl）disulfanyl）pyrimidin-4-yl）pyridinium hexafluorophosphate was obtained by X-ray single-crystal diffraction. This molecule crystallizes in monoclinic P2/c space group with a=6.219（1）, b=13.103（2）, c=13.059（2） , β=97.567（2）°, Z=2, the final R=0.0525 and w R=0.1434. The title compound was prepared successfully from 1,2-bis（4-（pyridin-3-yl）pyrimidin-2-yl）disulfane（BPPD）. TD-DFT computational studies on energy gaps and UV-Vis spectra of BPPD and the title compound have been carried out for comparisons. The resultant HOMO-LUMO gap of the BPPD compound is 4.45 e V, while that for the corresponding hexafluorophosphate salt is much smaller at 2.46 e V, which are in agreement with their UV-Vis absorptions.

关键词： resultant monoclinic pyrimidine torsion assembly conjugated octahedral salts heterocyclic tetra

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Freight transportation Demand Forecast and Structural Adjustment in Yangtze River Delta

Freight Transportation Demand Forecast and Structural Adjust...

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2022 International Conference on Smart transportation and City Engineering, STCE 2022

作者： Song, Yuanyuan Liu, Shengqiang Wu, Rui Xing, Youkai Wang, Renjie Transport Planning and Research Institute Ministry of Transport Beijing100028 China Laboratory of Transport Pollution Control and Monitoring Technology Beijing100028 China Beijing Jiaotong University Beijing100044 China

ISBN: (纸本)9781510660250

This paper systematically sorted out the changing trend of the industrial structure, energy structure and transportation structure in the Yangtze River Delta region, comprehensively analyzed the impact of future economic and social development on freight demand, predicted the future evolution trend of freight demand in the Yangtze River Delta region, and put forward relevant work suggestions for the optimization of freight transport structure in the Yangtze River Delta region. © 2022 SPIE.

关键词： Freight transportation

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Analysis of the migration mechanisms of tire wear Particles in quartz sand: Insights into aging pathways and pH regulation effects

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Journal of Environmental Chemical Engineering 2025年第3期13卷

作者： Jianghua Yu Chi Liu Zhangle Chen Zidong Ye Kun Li Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology China School of Environmental Science and Engineering Nanjing University of Information Science and Technology Nanjing 210044 China

As a pivotal source of non-exhaust microplastic pollution in the automotive industry, tire wear particles (TWPs) remain an area of research in its infancy regarding their migration mechanisms and environmental influences. This study delves into the migration characteristics of TWPs within saturated quartz sand media, with a particular emphasis on the regulatory effects of diverse aging scenarios—encompassing pure water, lake water, bacterial mixtures, and simulated soil solutions—alongside pH fluctuations. Our findings unveil that the aging process profoundly reshapes the physicochemical properties of TWPs, encompassing surface morphology, elemental composition, crystal structure, functional group characteristics, as well as surface potential and wettability. Notably, TWPs aged in a mixed bacterial solution (M-TWPs) exhibit a dramatic increase in specific surface area, ranging from 59 to 2038 times that of their unaged counterparts (U-TWPs). Consequently, the maximum penetration ratio of M-TWPs at neutral pH (7.0) soars to 0.89, marking a 2.4-fold enhancement compared to U-TWPs (0.37). This results from bacterial attachment and metabolites roughen TWPs' surface, cause fractures, enhance charge, and increase hydrophilicity, boosting migration. Crucially, pH governs TWPs' migration by modulating surface charges and electrostatic interactions with quartz sand. Alkaline conditions (pH=10) reduce electrostatic adsorption, increasing migration efficiency, while acidic environments (pH=4) enhance adsorption, decreasing migration. Additionally, material exchange during migration subtly affects filtrate pH and redox potential, highlighting the complexity of TWPs' environmental interactions. Our findings deepen the understanding of TWPs' environmental behavior and provide a foundation for assessing their migration paths and ecological effects, informing future research and risk management strategies.

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Microphysical Characteristics of Sea Fog over the East Coast of Leizhou Peninsula, China

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Advances in Atmospheric Sciences 2013年第4期30卷 1154-1172页

作者：赵丽娟牛生杰张羽徐峰 Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Atmospheric Physics Nanjing University of Information Science and Technology Zhanjiang Meteorological Bureau Guangdong Ocean University

Microphysical properties of sea fog and correlations of these properties were analyzed based on the measurements from a comprehensive field campaign carried out from 15 March to 18 April 2010 on Donghai Island （21°35″N, 110°32″5′E） in Zhanjiang, Guangdong Province, China. There were four types of circula- tion pattern in favor of sea fog events in this area identified, and the synoptic weather pattern was found to influence the microphysical properties of the sea fogs. Those influenced by a warm sector in front of a cold front or the anterior part of low pressure were found to usually have a much longer duration, lower visibility, greater liquid water content, and bigger fog droplet sizes. A fog droplet number concentration of N≥1 cm-a and liquid water content of L≥0.001 g m-a can be used to define sea fogs in this area. The type of fog droplet size distribution of the sea fog events was mostly monotonically-decreasing, with the spectrum width always being 〉20 μm. The significant temporal variation of N was due in large part to the number concentration variation of fog droplets with radius 〈3 μm. A strong collection process appeared when droplet spectrum width was 〉10 μm, which subsequently led to the sudden increase of droplet spectrmn width. The doln- inant physical process during the sea fog events was activation with subsequent condensational growth or reversible evaporation processes, but turbulent mixing also played an important role. The collection process occurred, but was not vital.

关键词： microphysical property microphysical correlation fog droplet size distribution the South China Sea

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Mitigating methane emissions during nitrogen removal in constructed wetlands

Water Biology and Security

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Water Biology and Security 2025年

作者： Li, Ziqian Hu, Liping Zeng, Chenjun Ye, Liuling Yang, Huijian Kong, Lingwei Wei, Jun Shi, Wenqing Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technologies Jiangsu Key Laboratory of Atmospheric Environmental Monitoring & Pollution Control School of Environmental Science & Engineering Nanjing University of Information Science & Technology Nanjing 210044 China Guangdong Research Institute of Water Resources and Hydropower Guangzhou 510635 China Guangdong Huike Hydraulic Technology Corporation Limited Guangzhou 510635 China Key Laboratory of Coastal Environment and Resources of Zhejiang Province School of Engineering Westlake University Zhejiang Hangzhou 310030 China Power China Huadong Engineering Corporation Limited Hangzhou 311122 China

As nitrogen removal requires anaerobic conditions for denitrification, which facilitates the production of methane (CH4), a potent greenhouse gas, it is a challenge to achieve nitrogen removal with minimal CH4 emissio... 详细信息

As nitrogen removal requires anaerobic conditions for denitrification, which facilitates the production of methane (CH₄), a potent greenhouse gas, it is a challenge to achieve nitrogen removal with minimal CH₄ emissions in constructed wetlands (CWs). This study proposed a solution for mitigating CH₄ emissions while achieving nitrogen removal using porous fillers in CWs. We found that active denitrification occurred in the interior pores of these fillers in an oxygen-rich environment. The microbial analysis indicated that the internal pores of porous fillers created anaerobic habitats for denitrifiers as they had a higher nosZ/amoA ratio than on the surface. The anaerobic decomposition of organic matter was inhibited, yielding significantly lower CH₄/CO₂ ratios (<1.0 × 10⁻⁵) than those of traditional CWs (0.07). The methanogen proliferation and CH₄ production efficiency also remained at low levels (<1.1 × 10⁻³ and 0.045%, respectively), which was significantly lower than in traditional CWs (2.3 × 10⁶ and 38%, respectively). Overall, this study proposed a strategy for mitigating the greenhouse effect of carbon emissions from CWs in the future. © 2025 The Authors

关键词： Constructed wetland Denitrification Methane Nitrification Nitrogen removal

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Characteristics of Various Freight Categories transported on Expressway in China

Characteristics of Various Freight Categories Transported on...

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International Conference on SmartRail, Traffic, and transportation Engineering, ICSTTE 2023

作者： Song, Yuanyuan Lan, Ziye Wu, Rui Xu, Honglei Zhu, Pengpeng Ministry of Transport Transport Planning and Research Institute Beijing China Laboratory of Transport Pollution Control and Monitoring Technology TPRI Beijing China Queen’s University of Belfast QUB Belfast United Kingdom

ISBN: (纸本)9789819736812

The study explores the characteristics of various freight categories transported on cross-provincial expressways. Based on the charge data from toll stations, the survey on freight categories transported on expressways was performed for K-prototypes clustering analysis and the characteristics of various freight categories transported on expressway were analyzed in terms of freight volume, transportation distance and freight flow. The analysis results showed that the freight with long transportation distance, large freight volume, low specialization degree of transportation vehicle, and high degree of delivery concentration accounted for a large proportion of bulk freight transported by expressways, whereas the freight with short transportation distance, small freight volume, high specialization degree of transportation vehicle, and low degree of delivery concentration accounted for a large proportion of the freight with high added values. The results can be used to guide the identification of the freight categories suitable for railway transportation and provide the theoretical basis and decision-making references for continuous adjustment and optimization of transportation structure. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Railroads

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