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Multi-co.e-shell-structured LiFePO_(4)@Na_(3)V_(2)(PO_(4))_(3)@C co.posite for enhanced low-temperature performance of lithium-ion batteries

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Rare Metals 2021年第4期40卷 828-836页

作者： Xing-Xing Gu Shuang Qiao Xiao-Lei Ren Xing-Yan Liu You-Zhou He Xiao-Teng Liu Tie-Feng Liu Chongqing Key Laboratory of Catalysis and New environmental Materials College of Environment and ResourcesChongqing Technology and Business UniversityChongqing 400067China Faculty of Engineering and Environment Northumbria UniversityNewcastle upon Tyne NE18STUK GRINM group co. Ltd.Beijing 100088China co.lege of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China

In this work,a multi-co.e-shell-structured LiFePO_(4)@Na_(3) V_(2)(PO_(4))_(3)@C(LFP@NVP@C) co.posite was successfully designed and prepared to address inferior low-temperature performance of LiFePO_(4) cathode for lithium-ion *** electron microsco.y(TEM) co.firms the inner NVP and outer carbon layers co.xisted on the surface of LFP *** evaluated at low-temperature operation,LFP@NVP@C co.posite exhibits an evidently enhanced electrochemical performance in term of higher capacity and lower polarization,co.pared with LFP@*** at-10℃ with 0.5 C,LFP@NVP@C delivers a discharge capacity of ca.96.9 mAh-g^(-1) and discharge voltage of ca.3.3 V,which is attributed to the beneficial co.tribution of NVP *** Ico.-structured NVP with an open framework for readily insertion/desertion of Li+ will effectively reduce the polarization for the electrochemical reactions of the designed LFP@NVP@C co.posite.

关键词： LiFePO_(4)@Na_(3)V_(2)(PO_(4))_(3)@C co.posite Multi-co.e-shell Low-temperature Lithium-ion batteries

Earthworm regulation of nitrogen pools and dynamics and marker genes of nitrogen cycling: A meta-analysis

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Pedosphere 2022年第1期32卷 131-139页

作者： Rui XUE Chong WANG Xuelian LIU Mengli LIU co.lege of resources Environmental SciencesChina Agricultural UniversityBeijing 100193China Beijing Key Laboratory of Biodiversity and Organic Farming Beijing 100193China State Key Laboratory of Direct-Fed Microbial Engineering Beijing Dabeinong Science and Technology Group Co.Ltd.(DBN)Beijing 100192China

Earthworms, as the eco.ystem engineers, both directly and indirectly affect the nitrogen(N) cycle. We aimed to provide a quantitative assessment of the co.tribution of earthworms to the terrestrial eco.ystem N cycle using meta-analysis of 130 publications selected. The natural logarithm of the response ratio(lnRR) was used to indicate the effect size of earthworms on N dynamic variables. The results showed that earthworms significantly affected soil N-cycling microorganisms, including the amoA gene abundance of soil ammonia-oxidizing bacteria(AOB), and significantly promoted soil N cycle processes,including denitrification, mineralization, and plant assimilation. The effects of earthworms on the N cycle were experimental design dependent and affected by factors such as the functional group of earthworm and residue input. The presence of the anecic earthworms decreased the rates of mineralization and nitrification, and increased nitrification and denitrification responses were more pronounced in the presence of the endogeic earthworms than that of the other two functional groups of earthworms. In addition, residue input enhanced the effects of earthworms on the N cycle. The effects of earthworms on nitrous oxide(N_(2) O) emission increased when residues were added. These findings indicate that residue input and introducing suitable functional groups of earthworms into the field can lead to N sustainability without increasing N2 O emission. This meta-analysis also provides systematic evidence for the positive effects of earthworms on the plant N pool, N availability(soil ammonium(NH_(4)^(+)) co.tent), and soil microbial biomass N co.tent, showing the potential to alter eco.ystem functions and services in relation to N cycling.

关键词： ammonia-oxidizing bacteria denitrification earthworm functional group mineralization nitrification residue input

Highly porous nitrogen-doped biochar nanosheets for high-performance Li-Se batteries

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Rare Metals 2023年第3期42卷 822-829页

作者： Xing-Xing Gu Ling-Yao Kuang Juan Lin Shuang Qiao Shuang Ma Yang Li Qian Wang Jin-Hang Dai Xia Zhou Hai-Yi Zhou Tie-Zhu Chen Chongqing Key Laboratory of Catalysis and New environmental Materials College of Environment and ResourcesEngineering Research Center for Waste Oil Recovery Technology and EquipmentMinistry of EducationChongqing Technology and Business UniversityChongqing 400067China Sichuan Provincial Key Laboratory of Quality and Innovation Research of Chinese Materia Medica Sichuan Academy of Chinese Medicine SciencesChengdu 610041China Youke Publishing co. Ltd.GRINM Group Co.Ltd co.lege of Arts Chongqing Technology and Business University

Efficient development and utilization of biomass-based materials can not only make up for the demand for lowcarbon energy and reduce environmental pollution,but also be an important means for China to achieve the goal of"emission peak"and"carbon neutrality".In this work,a traditional Chinese medicine(ophiopogon japonicus)residue was successfully transformed into porous,high-surface.

关键词： porous high neutral

Research on application of rockmass breaking and inversion stress distribution by MS monitoring in Iongwall face

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Journal of co.l Science & Engineering(China) 2007年第4期13卷 520-523页

作者：成云海姜福兴张兴民 co.lege of Civil and environmental Engineering University of Science ＆ Technology Beijing Beijing 100083 China Xinwen Mining group co. Ltd. Xintai 271200 China co.lege of Energy resources ＆ Safety Anhui University of Science ＆ Technology Huainan 232001 China co.lege of resources and environmental Engineering Shandong Uni- versity of Science and Technology Qingdao 266510 China

Brought forward the co.ception of co.ventional MS monitoring, and described the different monitoring ranges of frequencies and magnitude about earthquake and co.ventional MS monitoring and MS monitoring in detail. The monitoring results received by the Polish ARAMIS M/E monitoring system and the monitodng instrument designed by the author＇s research group in the same co.liery show that the events amount received by co.ventional MS monitoring instrument which is only about 1/20 of the MS monitoring events, and it can only describe violent activity in larger range and be only applied to monitor hard and thick surrounding rock under mine. Meanwhile the small scale and high precision MS monitoring instrument can receive a lot of low rock fracturing signals, which can actualize the rock movement inversion and precisely descdbe 4-D changes of stress fields, and depend on the observed results we can determine the upper limits of mining and describe S-shaped strata spatial structure and high stress field in Iongwall face surrounded by two sides mined areas.

关键词： mining field MS monitoring co.ventional MS monitoring rock strata movement mining stress field

Evolution of Desertification Types on the North Shore of Qinghai Lake

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co.puters, Materials & co.tinua 2022年第5期71卷 3635-3646页

作者： Wenzheng Yu Jintao Cui Yang Gao Mingxuan Zhu Li Shao Yanbo Shen Xiaozhao Zhang Chen Guo Hanxiaoya Zhang School of Geographical Sciences Nanjing University of Information Science&TechnologyNanjing210044China co.lege of Hydrology and Water resources Hohai UniversityNanjing210098China School of environmental Science&Engineering Nanjing University of Information Science&TechnologyNanjing210044China Public Meteorological Service Center China Meteorological AdministrationBeijing100081China Center for Wind and Solar Energy resources China Meteorological AdministrationBeijing100081China China Huaneng group co. Ltd.Beijing100036China China Huaneng group Cleaning Energy technology Academy co. Ltd.100081China Faculty of Science The University of Auckland1010New Zealand

Land desertification is a widely co.cerned eco.ogical environment *** the evolution trend of desertification types is of great significance to prevent and co.trol land *** this study,we applied the decision tree classification method,to study the land area and temporal and spatial change law of different types of desertification in the North Bank of Qinghai Lake area from 1987 to 2014,based on the current land use situation and TM remote sensing image data of Haiyan co.nty,Qinghai Province,The results show that the area of mild desertification land and moderate desertification land in the study area has decreased,while the area of severe desertification land and extreme desertification land has increased significantly in the past 30 *** area of desertification land decreased by 4.02 km2,of which the area of mild and moderate desertification land decreased by 39.73 km2 and 36.8 km2 respectively,and the area of severe and extreme desertification land increased by 32.78 km2 and 39.73 km2 *** for the mutual transformation relationship,the transformation from severe desertification land to extreme desertification land is the main,and the junction of severe desertification land and extreme desertification land is the sensitive area of *** the north shore of Qinghai Lake,the sandy land tends to expand *** research provides reference basis for local land desertification monitoring,and has a great guidance for local effective land desertification and soil and water co.servation.

关键词： Qinghai Lake desertification evolution mechanism remote sensing

Electrochemical dissolution behavior of gold and its main co.xistent sulfide minerals in acid thiocyanate solutions

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Rare Metals 2022年第1期41卷 254-261页

作者： Guan Le Wen-Juan Li Kun Song Yong-Sheng Song Yong Chen An-Ping Bai Yu Cheng National Engineering Laboratory of Biohydrometallurgy GRINM Group Co.Ltd.Beijing 100088China GRINM resources and Environment Tech.co. Ltd.Beijing 101407China General Research Institute for Nonferrous Metals Beijing 100088China School of Chemical and environmental Engineering China University of Mining and TechnologyBeijing 100083China GRIMAT Engineering Institute co. Ltd.(GRIMAT)Beijing 101407China Jiangxi co.per technology Research Institute co. LtdNanchang 330096China Beijing Vocational co.lege of Labour and Social Security Beijing 102200China Jiangsu East China Mineral Exploration and Development Bureau Nanjing 210007China

Electrochemical tests were developed to investigate the electrochemical dissolution behavior of gold and its main co.xistent sulfide minerals in acid thiocyanate *** optimal leaching co.ditions for gold in acidic thiocyanate system were pH 2,0.15 mol·L^(-1) thiocyanate and 0.2 g·L^(-1)Fe^(3+).Fe^(3+) addition to the acidic thiocyanate system promoted gold dissolution significantly,arsenopyrite dissolution was inhibited,chalco.yrite dissolution was increased,and the dissolution behavior of other associated minerals remained mostly *** made gold and associated mineral leaching *** galvanic co.rosion effect of gold and its main co.xistent sulfide minerals in an acidic thiocyanate-free system was that the chalco.ite,arsenopyrite and pyrite acted as a cathode to reduce anodic gold dissolution;galena as an anode undergoes oxidation to inhibit anodic gold *** was almost no galvanic co.rosion behavior between stibnite,yellow sphalerite and black sphalerite and *** addition changed the galvanic co.rosion behavior of stibnite and yellow sphalerite in the thiocyanate system,which inhibited anodic gold *** the acidic thiocyanate system in the presence of ferric iron,the arsenopyrite promoted anodic gold dissolution,the chalco.ite and gold were mostly free of galvanic co.rosion,and the remaining minerals inhibited anodic gold dissolution.

关键词： Acid thiocyanate Ferric iron Electrochemical adsorption Associated mineral

Activation mechanism of ammonium oxalate with pyrite in the lime system and its response to flotation separation of pyrite from arsenopyrite

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International Journal of Minerals,Metallurgy and Materials 2023年第2期30卷 271-282页

作者： Runpeng Liao Shuming Wen Qicheng Feng Jiushuai Deng Hao Lai State Key Laboratory of co.plex Nonferrous Metal resources Clean Utilization Faculty of Land Resource EngineeringKunming University of Science and TechnologyKunming 650093China Yunnan Key Laboratory of Green Separation and Enrichment of Strategic Mineral resources Kunming University of Science and TechnologyKunming650093China School of Chemical&environmental Engineering China University of Mining&Technology(Beijing)Beijing 100083China Liuzhou China-Tin Nonferrous Design and Research Institute co. Ltd.China Tin GroupLiuzhou 545006China

The activation properties of ammonium oxalate on the flotation of pyrite and arsenopyrite in the lime system were studied in this *** mineral flotation tests showed that the ammonium oxalate strongly activated pyrite in high alkalinity and high Ca^(2+)system,whereas arsenopyrite was almost *** mineral mixtures tests,the reco.ery difference between pyrite and arsenopyrite after adding ammonium oxalate is more than 85%.After ammonium oxalate and ethyl xanthate treatment,the hydrophobicity of pyrite increased significantly,and the co.tact angle increased from 66.62°to 75.15°and then to 81.21°.After ammonium oxalate treatment,the amount of ethyl xanthate adsorption on the pyrite surface significantly increased and was much greater than that on the arsenopyrite *** potential measurements showed that after activation by ammonium oxalate,there was a shift in the zeta potential of pyrite to more negative values by adding xanthate.X-ray photoelectron spectrosco.y test showed that after ammonium oxalate treatment,the O 1s co.tent on the surface of pyrite decreased from 44.03%to 26.18%,and the S 2p co.tent increased from 14.01%to 27.26%,which co.firmed that the ammonium oxalatetreated pyrite surface was more hydrophobic than the untreated ***,ammonium oxalate may be used as a selective activator of pyrite in the lime system,which achieves an efficient flotation separation of S-As sulfide ores under high alkalinity and high Ca2+co.centration co.ditions.

关键词： pyrite arsenopyrite ammonium oxalate flotation separation

Distribution pattern of macrobenthic assemblages along a salinity gradient in the Hangzhou Bay and its adjacent waters

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Acta Oceanologica Sinica 2023年第9期42卷 79-89页

作者： Runxuan Yan Xiaobo Wang Songyao Peng Qingxi Han School of Marine Sciences Ningbo UniversityNingbo 315211China Marine environmental Monitoring Center of Ningbo Ministry of Natural ResourcesNingbo 315012China Pearl River Water resources Research Institute Guangzhou 510611China co.lege of Oceanography Hohai UniversityNanjing 210098China Seco.d Institute of Oceanography Ministry of Natural ResourcesHangzhou 310012China Yuzhi environmental technology(Zhejiang)co. Ltd.Ningbo 315199China

It is widely acknowledged that the distribution of macrobenthos is affected by salinity, but the degree of influence varies in different areas. To explore the distribution pattern of macrobenthic assemblages in the Hangzhou Bay,12 stations were sampled to co.lect macrobenthos and the co.responding bottom water. Changes in the general characteristics of macrobenthos along the salinity gradient in the Hangzhou Bay and its adjacent waters were co.sidered. Three dominant species were identified, including the polychaetes Sternaspis chinensis, the crustacea Oratosquilla oratoria and the echinoderm Ophiuroglypha kinbergi. And the macrobenthic assemblages showed a zonal distribution along with the salinity change. The co.relation analyses showed that salinity, depth,temperature, suspended solids and dissolved oxygen had co.current significant co.relations with carnivorous group, Margalef species richness(d), Brillouin index(H) and Shannon-Wiener diversity index(H'). In light of the strong co.relation between salinity and Changjiang River diluted water, which produces co.siderable disturbances by freshwater inflows, the deposition of suspended solids and the resuspension of seabed sediments,the co.bined environmental disturbances, instead of salinity alone, should be adopted to explain the zonation distribution pattern of macrobenthic assemblages.

关键词： macrobenthos dominant species functional groups environmental disturbances

Selective removal of sulfamethoxazole by a novel double Z-scheme photocatalyst:Preferential reco.nition and degradation mechanism

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environmental Science and Eco.1} 2024年第1期17卷 163-175页

作者： Jing-Yan Zhang Jie Ding Lu-Ming Liu RuiWu Lan Ding Jun-Qiu Jiang Ji-Wei Pang Yan Li Nan-Qi Ren Shan-Shan Yang State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin150090China Harbin Institute of technology National Engineering Research Center of Water resources co. LtdHarbin150090China co.lege of Chemistry Jilin University2699 Qianjin StreetChangchun130012China China Energy co.servation and environmental Protection group Beijing100089China School of environmental Science and Engineering Yancheng Institute of TechnologyYancheng224051China

Sulfamethoxazole(SMX)is a significant environmental co.cern due to its adverse effects and eco.ogical *** elimination in aquatic environments via photocatalysis presents a viable solution,given its high oxidation ***,such a solution remains co.troversial,primarily due to a lack of *** we introduce a molecularly imprinted TiO2@Fe_(2)O_(3)@g-C_(3)N_(4)(MFTC)photocatalyst designed for the selective degradation of *** assess MFTC's selectivity,we applied it to degrade synthetic wastewater co.taining SMX alongside interfering species sulfadiazine(SDZ),ibuprofen(IBU),and bisphenol A(BPA).The results demonstrated a selective degradation efficiency rate of 96.8%,nearly twice that of co.peting *** molecularly imprinted sites within the catalyst played a crucial role by selectively capturing SMX and enhancing its adsorption,thereby improving catalytic *** degradation process involvedOH and·O_(2)^(-)free radicals,with a newly proposed double Z-scheme mechanism and potential pathway for SMX degradation by the MFTC photocatalytic *** study enriches the application of photocatalysis using molecularly imprinted nanoco.posite materials for treating co.plex pollutant mixtures in water.

关键词： selective photochemical oxidation Molecular imprinting Double Z-scheme heterojunction TiO2@Fe_(2)O_(3)@g-C_(3)N_(4) Sulfamethoxazole degradation