检索结果-南通市图书馆

petroleum Science 2025年第1期22卷 370-383页

作者： Yi-Jun Wang Li-Jun You Jian Yang Yi-Li Kang Ming-Jun Chen Jia-Jia Bai Jian Tian state key laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University Engineering Technology Research Institute of Southwest Oil & Gas Field Company PetroChina School of petroleum Engineering Changzhou University state key laboratory of Coal Mine Disaster Dynamics and control Chongqing University

To elucidate the adsorption characteristics and retention mechanisms of fracturing fluids in diverse clay minerals, we conducted on-line nuclear magnetic resonance(NMR) and atomic force microscopy(AFM)experiments. The depth and extent of solid phase damage are determined by the ratio between the size of fine fractions in fracturing fluid residue and the pore-throat size in experiments. Poor physical properties(K 0.5 m D) combined with a scattered distribution of retained fracturing fluid is associated with high gas phase recovery permeability, whereas a continuous sheet-like distribution results in low recovery permeability. The expansive surface area and presence of filamentous illite minerals facilitate the multiple winding and adsorption of fracturing fluids, demonstrating strong hydrogen-bonding, multi-layering and multiple adsorption properties. The geological characteristics of the main gas formations exhibit significant variation, and the severity of damage caused by fracturing fluids occurs in diverse sequences. To address this issue, a differentiated strategy for optimizing fracturing fluids has been proposed.

关键词： Clay minerals Formation damage Fracturing fluid retention distribution Adsorption morphology

Gold-catalyzed intermolecular amination of allyl azides with ynamides: Efficient construction of 3-azabicyclo[3.1.0] scaffold

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2025年第2期36卷 384-388页

作者： Chong-Yang Shi Jian-Xing Gong Zhen Li Chao Shu Long-Wu Ye Qing Sun Bo Zhou Xin-Qi Zhu College of Chemistry and Chemical Engineering Yunnan Normal University key laboratory of Chemical Biology of Fujian Province State Key Laboratory of Physical Chemistry of Solid Surfacesand College of Chemistry and Chemical EngineeringXiamen University state key laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of Sciences key laboratory of Jiangxi Province for Persistent pollutants control and Resources Recycle Nanchang Hangkong University

Gold-catalyzed amination reactions based on azides via α-imino gold carbene intermediates have attracted extensive attention in the past decades because this methodology leads to the facile and efficient construction of synthetically useful N-containing molecules, especially valuable N-heterocycles. However,successful examples of intermolecular generation of α-imino gold carbenes by using azides as amination reagents are rarely explored probably due to the weak nucleophilicity of azides. Herein, we disclose an efficient gold-catalyzed intermolecular aminative cyclopropanation of ynamides with the allyl azides, enabling flexible synthesis of a wide range of valuable 3-azabicyclo[3.1.0]hex–2-ene derivatives in good to excellent yields with excellent diastereoselectivities. Importantly, this protocol represents the first use of allyl azide as an efficient amination reagent in gold-catalyzed alkyne amination reactions.

关键词： Alkynes Amination Azides Gold Heterocycles

Construction of eco-friendly dual carbon dots ratiometric fluorescence probe for highly selective and efficient sensing mercury ion

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2025年第2期148卷 1-12页

作者： Yongli Liu Xiaoyan Su Huanjia Liu Guifen Zhu Guobei Ge Yuxin Wang Penghui Zhou Qingxiang Zhou School of Environment Henan Key Laboratory for Environmental Pollution ControlKey Laboratory for Yellow River and Huai River Water Environmental and Pollution ControlMinistry of EducationHenan Normal UniversityXinxiang 453007China College of Chemical Engineering and Environment China University of Petroleum-BeijingBeijing 102249China

In present work,blue carbon dots(b-CDs)were derived from ammonium citrate and guanidine hydrochloride,and red carbon dots(r-CDs)were stemmed from malonate,ethylenediamine and meso-tetra(4-carboxyphenyl)porphin based on facile hydrothermal ***-friendly ratiometric fluorescence probe was innovatively constructed to effectively measure Hg2+utilizing b-CDs and *** developed probe displayed two typical emission peaks at 450 nm from b-CDs and 650 nm from r-CDs under the excitation at 360 *** ion has strong quenching effect on the fluorescence intensity at 450 nm due to the electron transfer process and the fluorescence change at 450 nm was used as the response signal,whereas the fluorescence intensity at 650 nm kept unchangeable which resulted from the chemical inertness between Hg^(2+)and r-CDs,serving as the reference signal in the sensing *** optimal circumstances,this probe exhibited an excellent linearity between the fluorescence response values of F450/F650 and Hg^(2+)concentrations over range of 0.01-10μmol/L,and the limit of detectionwas down to 5.3 nmol/***,this probe was successfully employed for sensing Hg^(2+)in practical environmental water samples with satisfied recoveries of 98.5%-105.0%.The constructed ratiometric fluorescent probe provided a rapid,environmental-friendly,reliable,and efficient platform for measuring trace Hg^(2+)in environmental field.

关键词： Blue carbon dots Red carbon dots Electron transfer Hg^(2+) Eco-friendliness

2D copper-iron bimetallic metal-organic frameworks for reduction of nitrate with boosted efficiency and ammonia selectivity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2025年第3期149卷 374-385页

作者： Qian Ma Yinghao Xue Chuning Zhang Yanyan Chen Wei Teng Hua Zhang Jianwei Fan state key laboratory of Pollution control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China

Electrocatalytic reduction of nitrate to ammonia has been considered a promising and sustainable pathway for pollutant treatment and ammonia has significant potential as a clean ***,the method has received much *** this work,Cu/Fe 2D bimetallic metal-organic frameworks were synthesized by a facile method applied as cathode materials without high-temperature *** centers(Cu,Fe)with enhanced intrinsic activity demonstrated higher removal ***,the 2D nanosheet reduced themass transfer barrier between the catalyst and nitrate and increased the reaction ***,the catalysts with a 2D structure showed much better removal efficiency than other structures(3D MOFs and BulkMOFs).Under optimal conditions,Cu/Fe-2D MOF exhibited high nitrate removal efficiency(87.8%)and ammonium selectivity(89.3%)*** ammonium yielded up to significantly 907.2μg/(hr·mg_(cat))(7793.8μg/(hr·mg_(metal)))with Faradaic efficiency of 62.8%at an initial 100 mg N/*** catalyst was proved to have good stability and was recycled 15 times with excellent *** simulations confirm the reduced Gibbs free energy of Cu/Fe-2D *** study demonstrates the promising application of Cu/Fe-2D MOF in nitrate reduction to ammonia and provides new insights for the design of efficient electrode materials.

关键词： Metal-organic frameworks Electrochemical denitrification Ammonium selectivity 2D bimetal materials

Recent advances of metal vacancies in energy and environmental catalysis:Synthesis,characterization,and roles

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green Energy & Environment 2025年第1期10卷 84-108页

作者： Long Sun Shunzheng Zhao Sirui Gao Ronghui Zhu Yiran Tan Xiaolong Tang Honghong Yi School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing100083China Beijing key laboratory of Resource-oriented Treatment of Industrial pollutants Beijing100083China

With the ongoing depletion of fossil fuels,energy and environmental issues have become increasingly critical,necessitating the search for effective ***,being one of the hallmarks of modern industry,offers a promising avenue for ***,the question of how to significantly enhance the performance of catalysts has gradually drawn the attention of *** engineering,a commonly employed and effective approach to improve catalyst activity,has become a significant research focus in the catalysis field in recent *** vacancies have received extensive attention due to their simple ***,exploration of metal vacancies has remained stagnant for a considerable period,resulting in a scarcity of comprehensive reviews on this ***,based on the latest research findings,this paper summarizes and consolidates the construction strategies for metal vacancies,characterization techniques,and their roles in typical energy and environmental catalytic ***,it outlines potential challenges in the future,aiming to provide valuable references for researchers interested in investigating metal vacancies.

关键词： Metal vacancies Catalysis Construction strategies Characterization techniques Roles

维普期刊数据库

Cubature Kalman Fusion Filtering Under Amplify-and-Forward Relays With Randomly Varying Channel Parameters

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2025年第2期12卷 356-368页

作者： Jiaxing Li Zidong Wang Jun Hu Hongli Dong Hongjian Liu the Department of Applied Mathematics Harbin University of Science and Technology IEEE the Department of Computer Science Brunel University London the School of Automation Harbin University of Science and Technology the Artificial Intelligence Energy Research Institute Northeast Petroleum University the Heilongjiang Provincial key laboratory of Networking and Intelligent control Northeast Petroleum University the National key laboratory of Continental Shale Oil of China Northeast Petroleum University the key laboratory of Advanced Perception and Intelligent control of High-End Equipment Ministry of Education Anhui Polytechnic University the School of Mathematics and Physics Anhui Polytechnic University

In this paper, the problem of cubature Kalman fusion filtering(CKFF) is addressed for multi-sensor systems under amplify-and-forward(AaF) relays. For the purpose of facilitating data transmission, AaF relays are utilized to regulate signal communication between sensors and filters. Here, the randomly varying channel parameters are represented by a set of stochastic variables whose occurring probabilities are permitted to exhibit bounded uncertainty. Employing the spherical-radial cubature principle, a local filter under AaF relays is initially constructed. This construction ensures and minimizes an upper bound of the filtering error covariance by designing an appropriate filter gain. Subsequently, the local filters are fused through the application of the covariance intersection fusion rule. Furthermore, the uniform boundedness of the filtering error covariance's upper bound is investigated through establishing certain sufficient conditions. The effectiveness of the proposed CKFF scheme is ultimately validated via a simulation experiment concentrating on a three-phase induction machine.

关键词： Amplify-and-forward (AaF) relays covariance intersection fusion cubature Kalman filtering multi-sensor systems uniform boundedness

Research status and prospect of purification technology of sulfur-containing odor gas

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2025年第3期149卷 301-313页

作者： Yuhan Long Shunzheng Zhao Xiaolong Tang Qingjun Yu Fengyu Gao Jun Liu YaWang Yuansong Zhou Honghong Yi School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China Beijing key laboratory of Resource-oriented Treatment of Industrial pollutants Beijing 100083China

Catalytic purification of sulphur-containing malodorous gases has attracted wide attention because of its advantages of high purification efficiency,low energy consumption and lack of secondary *** selection of efficient catalysts is the key to the problem,while the preparation and optimisation of catalysts depend on the analysis of experimental results and in-depth mechanistic *** analysing the published literature,bibliometric analysis can identify existing research hotspots,the areas of interest and predict development trends,which can help to identify hot catalysts in the catalytic purification of sulphurcontaining odours and to investigate their catalytic purification ***,this paper uses bibliometric analysis,based on Web Of Science and CNKI databases,CiteSpace and VOS viewer software to collate and analyse the literature on the purification of sulphurcontaining odour pollutants,to identify the current research hotspots,to summarise the progress of research on the catalytic purification of different types of sulphur-containing odours,and to analyse their reaction mechanisms and *** this basis,the research progress of catalytic purification of different kinds of sulfur odour is summarized,and the reaction mechanism and dynamics are summarized.

关键词： Bibliometric Sulphur-containing odor gases Catalytic oxidation Catalytic decomposition

Bioaccessibility and health risk assessment of hydrophobic organic pollutants in soils from four typical industrial contaminated sites in China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2025年第1期147卷 282-293页

作者： Shi-Ping Ou Xiao-Liang Liao Zi-Tao Huang Yan-Cong Hu Zongwei Cai Zhi-Feng Chen Guangdong key laboratory of Environmental Catalysis and Health Risk control Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and HealthSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China state key laboratory of Environmental and Biological Analysis Department of ChemistryHong Kong Baptist UniversityHong Kong 999077China

There have been reports of potential health risks for people from hydrophobic organic pollutants,such as polycyclic aromatic hydrocarbons(PAHs),polychlorinated hydrocarbons(PCHs),and organophosphate flame retardants(OPFRs).When a contaminated site is used for residential housing or public utility and recreation areas,the soil-bound organic pollutantsmight pose a threat to human *** this study,we investigated the contamination profiles and potential risks to human health of 15 PAHs,6 PCHs,and 12 OPFRs in soils from four contaminated sites in *** used an in vitro method to determine the oral bioaccessibility of soil *** PAHswere found at concentrations ranging from26.4 ng/g to 987 ng/***(0.27-14.3 ng/g)and OPFRs(6.30-310 ng/g)were detected,but at low levels compared to earlier *** levels of PAHs,PCHs,and OPFRs released from contaminated soils into simulated gastrointestinal fluids ranged from 1.74%to 91.0%,2.51%to 39.6%,and 1.37%to 96.9%,*** on both spiked and unspiked samples,we found that the oral bioaccessibility of pollutantswas correlated with their logKow andmolecularweight,and the total organic carbon content and pH of *** in 13 out of 38 contaminated soil samples posed potential high risks to *** considering oral bioaccessibility,nine soils still posed potential risks,while the risks in the remaining soils became *** contribution of this paper is that it corrects the health risk of soil-bound organic pollutants by detecting bioaccessibility in actual soils from different contaminated sites.

关键词： Contaminated soil Hydrophobic organic pollutant Polycyclic aromatic hydrocarbon Oral bioaccessibility Risk assessment

control of Differential Tectonic Evolution on Tectonic Fractures in Different Tectonic Segments of Tight Gas Sandstone Reservoirs: Upper Triassic Xujiahe Formation， Western Sichuan Foreland Basin

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Earth Science 2025年

作者： Yunzhao Zhang Lianbo Zeng Rongjun Zhang Le Qu Hao Wu Quanqi Dai School of Earth Sciences and Engineering， Xi'an Shiyou University Shaanxi key laboratory of petroleum Accumulation Geology， School of Earth Sciences and Engineering， Xi'an Shiyou University state key laboratory of petroleum Resources and Prospecting， China University of petroleum (Beijing) College of Geosciences， China University of petroleum (Beijing) College of petroleum Engineering， Xi'an Shiyou University Xi'an key laboratory of Tight oil (Shale oil) Development， Xi'an Shiyou University China key laboratory of Mineral Resources in Western China， School of Earth Sciences， Lanzhou University state key laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development， SINOPEC key laboratory of Carbon Capture， Utilization and Storage， petroleum Exploration and Production Research Institute of SINOPEC

In the context of complex tectonic evolution， due to the control of tectonic compression stress and faults on tectonic fractures， the formation and development of tectonic fractures in the T3x2tight reservoirs present significant variations across different tectonic segments in the Western Sichuan Foreland Basin. We clarified the control of differential tectonic evolution on the formation and development of tectonic fractures in different tectonic segments through field-based observations， core samples， image logging， as well as fluid inclusion petrography and temperature determinations of fracture-filling materials， combined with 2D balanced cross-section restoration. The study area primarily manifests two types of tectonic fractures in the tight reservoirs: orogen-related fractures （regional fractures） and fault-related fractures. The orientations of these fractures are predominantly E-W， nearly N-S， NE， and NW. Specifically， the northern segment area only shows the development of regional fractures， while the southern and middle segments exhibit the development of both regional and tectonic fractures. There are three phases of tectonic fractures in different tectonic segments， and their formation times are relatively consistent. The Mesozoic tectonic events had a significant impact on the northern and central segments， with the amount of tectonic shortening and the rate of stratigraphic shortening gradually decreasing from the northeast to the southwest. The compressional stress resulting from tectonic compression also decreases from the northeast to the southwest. As a result， the development of first-phase and second-phase tectonic shear fractures is more pronounced in the northern and middle segments compared to the southern segment. Under the significant control of faults， the development of N-S- and NE-oriented fault-related fractures is more pronounced in the southern segment， while the development of NE-oriented fault-related fractures is relatively higher

关键词：

Investigation into enhanced performance of toluene and Hg0 stimulative abatement over Cr-Mn oxides co-modified columnar activated coke

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2025年第2期148卷 88-106页

作者： Jiajie Wang Jie Liu Lei Gao Dong Xie Caiting Li Liping Xiang Huiyu Xiong Jiaqi Xie Tianren Zhang Yueguo Pan School of Resources Environment and Safety Engineering University of South ChinaHengyang 421001China National&Local Joint Engineering Research Center for Airborne pollutants control and Radioactivity Protection in Buildings Hengyang 421001China key laboratory of Prefabricated Building Energy Saving Technology of Hunan Province Hengyang 421001China College of Environmental Science and Engineering Hunan UniversityChangsha 410082China

In this study,a string of Cr-Mnco-modified activated coke catalysts(XCryMn1-y/AC)were prepared to investigate toluene and Hg0 removal *** characterizations including XRD,TEM,SEM,in situ DRIFTS,BET,XPS and H_(2)-TPR showed that 4%Cr0.5Mn0.5/AC had excellent physicochemical properties and exhibited the best toluene and Hg0 removal efficiency at 200◦*** varying the experimental gas components and conditions,it was found that too large weight hourly space velocity would reduce the removal efficiency of toluene and *** O_(2) promoted the abatement of toluene and Hg0,the inhibitory role of H_(2)O and SO_(2) offset the promoting effect of O_(2) to some *** significantly inhibited Hg0 removal,resulting from that toluene was present at concentrations orders of magnitude greater than mercury’s or the catalyst was more prone to adsorb toluene,while Hg0 almost exerted non-existent influence on toluene *** mechanistic analysis showed that the forms of toluene and Hg0 removal included both adsorption and oxidation,where the high-valent metal cations and oxygen vacancy clusters promoted the redox cycle of Cr^(3+)+Mn^(3+)/Mn^(4+)+Cr^(6+)+Mn^(2+),which facilitated the conversion and replenishment of reactive oxygen species in the oxidation process,and even the CrMn1.5O4 spinel structure could provide a larger catalytic interface,thus enhancing the adsorption/oxidation of toluene and ***,its excellent physicochemical properties make it a costeffective potential industrial catalyst with outstanding synergistic toluene and Hg0 removal performance and preeminent resistance to H_(2)O and SO_(2).

关键词： Toluene Element mercury Cr-Mn oxides Activated coke