检索结果-内蒙古大学图书馆

SSRN 2023年

作者： Mi, Xin Li, Xiang Wang, Chong-Chen Wang, Bo Advanced Research Institute of Multidisciplinary Science School of Chemistry and Chemical Engineering Beijing Institute of Technology No. 5 South Street Zhongguancun Haidian District Beijing100081 China Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation Beijing Advanced Innovation Center for Future Urban Design Beijing University of Civil Engineering and Architecture Beijing100044 China Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Beijing100081 China

The invalid consumption of reactive oxygen species by non-target background substance in water make the effective Removal of emerging contaminant challenging. Metal-organic framework (MOFs) is promising for the selective accumulation and subsequent decomposition of micropollutants. Herein, representative Ce (IV)-MOFs, including UiO-66 and MOF-808, Ce-BTC, and CeO2, were synthesized as the platform to systematically explore the preferential adsorption integrated with degradation of pharmaceutical active compounds (PACs) and perfluoroalkyl carboxylic acid (PFCAs) in detail for the first time. The adsorption capacities of ofloxacin (OFC) on MOF-808 (Ce) was greater (419.78 mg/g) than that of the existing materials reported to date, proving that Ce (IV)-MOFs with Lewis acid sites is among the rank of excellent adsorbent for –COOH-containing pollutants including NSAID, PFCAs, and Quinone antibiotics by the mechanism of electrostatic interaction. Notably, the calculated adsorption capacities of selected NSAIDs over UiO-66 were successfully correlated with the corresponding pseudo-first-order rate constant during the degradation (R2 = 0.99) under irradiation of visible light, indicating the strong bonding sites within pores could facilitate the subsequent degradation in situ. Besides, the hydrophobic interaction should be another major interaction between microporous Ce-MOFs and PFCAs. The log Kow, MW of PFCAs can be successfully correlated with (R2 =0.87 ~ 0.99) the adsorption kinetic ln (v0) and capacity (Qe) over Ce-MOFs, respectively. ESR was performed to explore the major reactive species for catalytic degradation. This study comprehensively investigates the selective Removal of the -COOH group containing micropollutants by Ce (IV)-MOFs with Lewis activity sites. © 2023, The Authors. All rights reserved.

关键词： Adsorption

来源：评论

学校读者我要写书评

暂无评论

Spatial-temporal characteristics and the importance of environmental factors in relation to algal blooms in coastal seas

引用

science of the Total environment 2024年 957卷 177686页

作者： Tong, Yanbin Lei, Kun Wang, Li Li, Yuanyi Lan, Wenlu Cheng, Yuming Deng, Zeng'an Zhai, Jingsheng Huang, Zhe School of Marine Science and Technology Tianjin University Tianjin300072 China Chinses Research Academy of Environmental Sciences Beijing100012 China Shanghai East Sea Marine Engineering Survey and Design Institute Co. Ltd. Shanghai200137 China Beibu Gulf Marine Ecological Environment Field Observation and Research Station of Guangxi Marine Environmental Monitoring Centre of Guangxi Beihai536000 China State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation Tianjin University Tianjin China

In the prediction of algal blooms with the artificial intelligence (AI) technology, the proper selection of the indices is crucial to the quality of the results. Although eutrophication and climate change have been identified as the main contributors to algal blooms, limited knowledge of the relationships among environmental factors hinders the accurate and correct AI prediction. To explore the importance of environmental factors in the occurrence of algal blooms in coastal seas and facilitate the selection of inputs for the prediction model, this study examines observed water quality data and analyzes their relationship using machine learning methods. It was found that nutrients, water temperature, and salinity play important roles in controlling algal blooms in coastal seas, and their influence varies depending on locations. The high-risk cases of algal bloom mainly occur in environments with medium salinity (22–28 psu), particularly in open estuaries with high nutrient levels. According to the feature importance analysis, water temperature presented the most significant impact on algal bloom risk compared to other environmental factors. The variations of water temperature and Chl-a concentration are synchronous when the water temperature is below 32 °C. Additionally, the relationships between inorganic nutrients (NO3−-NO2− and Ortho-P) and Chl-a exhibit asynchronous across multi-temporal scales. The uptake of inorganic nutrients occurs in large quantities within the 24 h prior to the boom in Chl-a concentration. This demonstrates that variations in concentration of inorganic nutrients can be considered as crucial factors in algal bloom predictions, and their significant decrease can be served as an important signal of an impending algal bloom. This study enhances our understanding of the mechanisms behind algal blooms and facilitates their management and prediction strategies in coastal seas. © 2024

关键词： Prediction models

来源：评论

学校读者我要写书评

暂无评论

N-Doped Carbon Layer Modified Na3v2(Po4)3 as a High- Performance Cathode Material for Sodium Ion Batteries

SSRN

引用

SSRN 2022年

作者： Ding, Haiyang He, Xin Tao, Qingdong Zhao, Haomiao Teng, Jinhan Xie, keyu Li, Jing State Key Laboratory of Environment-friendly Energy Materials School of Material Science and Engineering Southwest University of Science and Technology Sichuan Mianyang621010 China Sichuan Lvxin Power Technology Co. Ltd. Shehong 629200 China School of Literature and Art Southwest University of Science and Technology Sichuan Mianyang621010 China School of Materials Science and Engineering Northwestern Polytechnical University Shaanxi Xi’an710072 China

Sodium super ion conductor (NASICON)-type Na3V2(PO4)3 (NVP) has been seen as an extremely potential cathode materials in sodium ion batteries (SIBs) for it owns many prominent merits like open 3D channel, high voltage platform, structural stability etc. Nevertheless, NVP is difficult to obtain excellent electrochemical performance at high rates with the defect of low electronic conductivity, which leads to the restriction of practical application. In this work, we used a simple sol-gel method synthesized a N-doped carbon layer modified Na3V2(PO4)3 composite material (NVP/NC) with urea as nitrogen source. And the further test proved that NVP/NC has better rate performance compared with NVP/C which has no N doping. The initial reversible capacity of NVP/NC can reached 109.18 mAh g-1 at 1 C, and the discharge specific capacity can still be 88.3 mAh g-1 even when the ultra-high current density is 50 C. In addition, NVP/NC also has excellent long cycle stability (the capacity retention rate still reach to 72.89% at 50 C after 8000 cycles, and the capacity reduction rate per revolution is only about 0.0034%). Because the N-doped carbon layer provides a surface channel for NVP electron transmission, the electronic conductivity is greatly enhanced, making the NVP/NC a better composite material for SBIs with higher rate performance. Hence, this work offers a practical process for solving the poor electronic conductivity issue of NVP. © 2022, The Authors. All rights reserved.

关键词： Doping (additives)

来源：评论

学校读者我要写书评

暂无评论

Synergy of Surface Adsorption and Intracellular Accumulation for Removal of Uranium with Stenotrophomonas Sp: Performance and Mechanisms

SSRN

引用

SSRN 2022年

作者： Hu, Zhongqiang Zhou, Zhongkui Zhou, Yaoyu Zheng, Lili Guo, Jianping Liu, Yong Sun, Zhanxue Yang, Zhihui Yu, Xiaoxia State Key Laboratory of Nuclear Resources and Environment East China University of Technology Jiangxi Nanchang330013 China School of Water Resources and Environmental Engineering East China University of Technology Jiangxi Nanchang330013 China College of Resources and Environment Hunan Agricultural University Changsha410128 China School of Energy and Environmental Engineering University of Science and Technology Beijing Beijing100083 China School of Metallurgy and Environment Central South University Hunan Changsha410083 China

Uranium is well-known to have serious adverse effects on the ecological environment and human health. Bioremediation stands out among many remediation methods owing to its being economically feasible and environmentally friendly. This study reported a great promising strategy for eliminating uranium by Stenotrophomonas sp. in the aquatic environment. The bacterium demonstrated excellent uranium adsorption capacity (qmax=392.9 mg/g) because of the synergistic effect of surface adsorption and intracellular accumulation. Further analysis revealed that hydroxyl, carboxyl, phosphate groups, and proteins of microorganisms were essential in uranium adsorption. Intracellular accumulation was closely related to cellular activity, and the efficiency of uranium processing by the permeabilized bacterial cells was significantly improved. In response to uranium stress, the bacterium was found to release multiple ions in conjunction with uranium adsorption, which facilitates the maintenance of bacterial life activities and the conversion of uranyl to precipitates. These above results indicated that Stenotrophomonas sp. CICC 23833 had great potential application value for the remediation of uranium. © 2022, The Authors. All rights reserved.

关键词： Uranium

来源：评论

学校读者我要写书评

暂无评论

N-Doped Carbon Layer Modified Na3v2(Po4)3 as a High- Performance Cathode Material for Sodium Ion Batteries

SSRN

引用

SSRN 2022年

关键词： Doping (additives)

来源：评论

学校读者我要写书评

暂无评论

El Niño–Southern Oscillation affects the species-level temporal variation in seed and leaf fall in a mixed temperate forest

引用

science of the Total environment 2022年 850卷 157751页

作者： Zhu, Meihui Ester, González de Andrés Wang, Yunyun Xu, Zhichao Ye, Ji Yuan, Zuoqiang Lin, Fei Fang, Shuai Mao, Zikun Wang, Xugao Hao, Zhanqing CAS Key Laboratory of Forest Ecology and Management Institute of Applied Ecology Chinese Academy of Sciences Shenyang110016 China University of Chinese Academy of Sciences Beijing100049 China Key Laboratory of Terrestrial Ecosystem Carbon Neutrality Liaoning Province China Zaragoza50059 Spain Faculty of Life Science and Technology Central South University of Forestry and Technology and National Engineering Laboratory for Applied Forest Ecological Technology in Southern China Changsha China School of Ecology and Environment Northwestern Polytechnical University Xi'an710072 China

El Niño–Southern Oscillation (ENSO), the variation between anomalously cold (La Niña) and warm conditions (El Niño), is one of the most prominent large-scale climate patterns with worldwide effects. Elevated seed and leaf fall has been found at the positive phase of ENSO (El Niño) in tropical forests. However, how seed and leaf fall respond to ENSO at species level is understudied, especially in temperate forests. In this study, we monitored seed and leaf fall at the species-level at 150 points across a 25-ha temperate forest in northeastern China over a span of 12 years. Using time series and wavelet analyses, we assessed three hypotheses: 1) temperate tree species' seed and leaf fall are strongly, but differently, correlated with ENSO and, 2) community synchrony in seed and leaf occurred both at seasonal and ENSO scales;finally, 3) local climatic modulated the effects of ENSO on seed and leaf fall. We found that ENSO was significantly correlated with seed and leaf fall of all species, although correlation strength varied across species (r = 0.206–0.658). Specifically, ENSO indices (ENSO12 or ENSO34) accounted for the most variation in seed and leaf fall of Acer pseudo-sieboldianum (40 % and 34 %, respectively) and ranged 4 %–31 % in all other species. Leaf fall was synchronous with ENSO cycles with a period of 2–7 years, but community synchrony of seed fall was only detected at seasonal scales. ENSO influenced seed fall of Fraxinus mandshurica and Tilla amurensis by mediating rainfall and relative humidity, respectively, highlighting the interactive effects of local climate and ENSO. Our findings highlight the potential effects of ENSO on ecosystems outside of tropical regions and improve our ability to predict regeneration dynamics and nutrient cycling of temperate forests under the context of global change. © 2022

关键词： Atmospheric pressure

来源：评论

学校读者我要写书评

暂无评论

Insights into Defect Effect of Photocatalytic 2e− Orr: Radical Reaction and Electronic Behavior

SSRN

引用

SSRN 2022年

作者： Shen, Yi Yao, Yanchi Lu, Lun Zhu, Chao Fang, Qile Wang, Jun Song, Shuang Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province College of Environment Zhejiang University of Technology Hangzhou310032 China State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment South China Institute of Environmental Sciences Ministry of Ecology and Environment Guangzhou510655 China College of Chemical Engineering Zhejiang University of Technology Hangzhou310032 China Advanced Institute of Natural Sciences Beijing Normal University Zhuhai Campus Zhuhai519087 China State Key Laboratory of Separation Membranes and Membrane Processes School of Environmental Science and Engineering Tiangong University Tianjin300387 China

The oxygen reduction reaction (ORR) is a promising application, but the structure-activity relationship between defect and photocatalytic 2e− ORR remains largely obscure. In this work, metal-organic frameworks (MOFs) with missing linker-cluster domain (MLCD) defects were employed to explore the underlying mechanism required for comprehensively understanding the MLCD defect effect on photocatalytic 2e− ORR, which mainly focused on the radical reaction and electronic behavior. Experiments and theoretical calculations revealed that incorporating MLCD defects significantly inhibits efficient photocatalytic kinetics, which might be attributed to the retarded charge transfer and variation in electronic behaviors. Meanwhile, the marginalized defective cluster showed undesirable electron dissipation and the augmented orbital-limited resistance induced by electron spin polarization, hindering the interfacial charge transfer through the "Ti-O" Bridge, which was unfavorable for O2 activation. This study provides insights into the internal mechanism of photocatalytic 2e− ORR for designing and optimizing excellent defective nanomaterials. © 2022, The Authors. All rights reserved.

关键词： Defects

来源：评论

学校读者我要写书评

暂无评论

Microporous Hard Carbon Support Provokes Exceptional Performance of Single Atom Electrocatalysts for Advanced Air Cathodes

引用

Angewandte Chemie 2025年

作者： Haijing Liu Ping Li Kaicai Fan Fenghong Lu Qi Sun Qi Zhang Bin Li Yajie Shu Lingbo Zong Lei Wang State Key Laboratory of Eco-chemical Engineering College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 China State Key Laboratory of Eco-chemical Engineering College of Environment and Safety Engineering Qingdao University of Science and Technology Qingdao 266042 China State Key Laboratory of Eco-chemical Engineering College of Materials Science and Engineering Qingdao University of Science and Technology Qingdao 266042 China National Local Joint Laboratory for Advanced Textile Processing and Clean Production Wuhan Textile University Wuhan 430200 China

Single atom catalysts embracing metal-nitrogen (MN x ) moieties show promising performance for oxygen reduction reaction (ORR). The modification on spatially confined microenvironments, which won copious attention with respect to achieving efficient catalysts, are auspicious but yet to be inspected for MN x moieties from modulating the energetics and kinetics of ORR. Here, Fe single atoms (SAs) are immobilized in microporous hard carbon (Fe-SAs/MPC), in which the microporous structure with crumpled graphene sheets serves confined microenvironment for catalysis. Fe-SAs/MPC holds a remarkable half-wave potential of 0.927 V and excellent stability for ORR. Theoretical studies unveil that hydrogen bonding between the intermediate of O* and micropore interior surfaces substantially promote its protonation and accelerate the overall ORR kinetics. Both the aqueous and quasi-solid-state zinc-air batteries driven by Fe-SAs/MPC air cathode show excellent stability with small charging/discharging voltage gaps. Importantly, when used as the air cathode for industrial chlor-alkali process, the applied voltage of Fe-SAs/MPC-based flow cell to reach 300 mA cm −2 is 1.57 V, which is 210 mV smaller than Pt/C-based one. These findings provide in-depth insights into the confined microenvironment of MN x moieties for boosted electrochemical performance, and pave the pathways for future catalyst development satisfying the requirement of industrial applications.

关键词： Chlor-alkali process Microporous hard carbon Oxygen reduction reaction Single atom Zn-air battery

来源：评论

学校读者我要写书评

暂无评论

A Survey of Error Analysis and Calibration Methods for MEMS Triaxial Accelerometers

引用

Computers, Materials & Continua 2020年第7期64卷 389-399页

作者： Bo Xiao Yinghang Jiang Qi Liu Xiaodong Liu Mingxu Sun Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Jiangsu Collaborative Innovation Centre of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing210044China School of Computer&Software Nanjing University of Information Science&TechnologyNanjingChina School of Computing Edinburgh Napier UniversityEdinburghUK Centre for Health Sciences Research University of SalfordSalfordM54WTUK Shandong Beiming Medical Technology Ltd. Jinan250101China

MEMS accelerometers are widely used in various fields due to their small size and low cost,and have good application ***,the low accuracy limits its range of *** ensure data accuracy and safety we need to calibrate MEMS *** authors have improved accelerometer accuracy by calculating calibration parameters,and a large number of published calibration methods have been *** this context,this paper introduces these techniques and methods,analyzes and summarizes the main error models and calibration procedures,and provides useful ***,the content of the accelerometer calibration method needs to be overcome.

关键词： MEMS accelerometer calibration error analysis accelerometer calibration

来源：评论

学校读者我要写书评

暂无评论

Synergistic Effect of Nitrogen and Copper Co-Doping in Anatase on Boosting Co Oxidation with So2 and H2o Tolerance

SSRN

引用

SSRN 2023年

作者： Cai, Bihai Zhou, Junhui Tan, Li Li, Didi Ao, Zhimin Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health Guangzhou Key Laboratory Environmental Catalysis and Pollution Control Institute of Environmental Health and Pollution Control Guangdong University of Technology Guangzhou510006 China Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control Key Laboratory for City Cluster Environmental Safety Green Development The Ministry of Education School of Environmental Science and Engineering Guangdong University of Technology Guangzhou510006 China Advanced Interdisciplinary Institute of Environment and Ecology Beijing Normal University Zhuhai Campus Zhuhai519087 China Chongqing 2D Materials Institute Chongqing400714 China Guangdong University of Technology China

CO catalytic oxidation with SO2 and H2O tolerance is a hotspot worthy of study, since the activity of the catalyst is limited not only by the adsorption of SO2 and H2O but also by the generated sulfite. Using density functional theory (DFT) calculations, the reinforcement of nitrogen and copper co-doping in anatase (N-Cu/T) on CO oxidation was investigated in this work. The substitutional nitrogen promotes the dispersibility of Cu, while Cu boosts CO and O2 adsorption on N-Cu/T, suggesting there is synergy between N and Cu. Under the synergistic effect, CO can be oxidized into CO2 on N-Cu/T via the Tri-molecular Eley-Rideal (TER) mechanism. The rate-limiting energy barrier for O2 activation is merely -0.49 eV and could maintain till to 1032.23 K. N-Cu/T exhibits high tolerance to SO2 and H2O because the active site is not impeded by pre-adsorbed SO2 or H2O and CO is difficult to react with them. Moreover, it is impossible to generate sulfite due to the high barrier energy (5.23 eV). Consequently, N-Cu/TiO2 is promising for the catalytic degradation of CO at low temperature, even in the presence of SO2 and H2O. © 2023, The Authors. All rights reserved.

关键词： Density functional theory

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：