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Influence of South Asian Biomass Burning on Ozone and Aerosol Concentrations Over the Tibetan Plateau

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Advances in Atmospheric Sciences 2022年第7期39卷 1184-1197,I0002-I0013页

作者： Junhua YANG Shichang KANG Yuling HU xintong CheN Mukesh RAI State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of Sciences(CAS)Lanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101China

In this work,the influence of South Asian biomass burning emissions on O_(3) and PM_(2.5)concentrations over the Tibetan Plateau(TP)is investigated by using the regional climate chemistry transport model *** simulation is validated by comparing meteorological fields and pollutant concentrations against in situ observations and gridded datasets,providing a clear perspective on the spatiotemporal variations of O_(3) and PM_(2.5)concentrations across the Indian subcontinent,including the Tibetan *** sensitivity simulations and analyses show that emissions from South Asian biomass burning mainly affect local O_(3) *** example,contribution ratios were up to 20%in the Indo-Gangetic Plain during the pre-monsoon season but below 1%over the TP throughout the year *** contrast,South Asian biomass burning emissions contributed more than 60%of PM_(2.5)concentration over the TP during the pre-monsoon season via significant contribution of primary PM_(2.5)components(black carbon and organic carbon)in western India that were lofted to the TP by westerly ***,it is suggested that cutting emissions from South Asian biomass burning is necessary to alleviate aerosol pollution over the TP,especially during the pre-monsoon season.

关键词： South Asian biomass burning ozone aerosol black carbon Tibetan Plateau

酚酸基纳米金修饰电极检测食品中的亚硝酸盐和亚硫酸盐

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食品工业科技 2025年第1期46卷 274-282页

作者：陈林林吴松遥郝熙李伟张铭张海鹏李昕彤张娜哈尔滨商业大学食品工程学院黑龙江哈尔滨150028

基于酚酸良好的还原性和无污染性建立酚酸基纳米金传感体系,以实现亚硝酸盐和亚硫酸盐的灵敏检测。采用不同酚酸还原氯金酸制备纳米金(Gold nanoparticles,AuNPs),通过紫外光谱和交流阻抗法获得还原效果最佳的酚酸为没食子酸(Gallic aci... 详细信息

基于酚酸良好的还原性和无污染性建立酚酸基纳米金传感体系,以实现亚硝酸盐和亚硫酸盐的灵敏检测。采用不同酚酸还原氯金酸制备纳米金(Gold nanoparticles,AuNPs),通过紫外光谱和交流阻抗法获得还原效果最佳的酚酸为没食子酸(Gallic acid,GA)。利用电沉积法制备GA@AuNPs@Au电极,并由线性扫描伏安法(Linear scanning voltammetry,LSV)表征亚硝酸盐和亚硫酸盐的电化学行为。优化体系条件为:GA浓度1 mmol/L、孵育温度70℃、反应时间60 min、pH6.0磷酸盐缓冲溶液浓度0.15 mol/L。亚硝酸盐和亚硫酸盐浓度在0.001~7 mmol/L范围内与氧化峰电流分别呈良好的线性关系(R2>0.994),检出限分别为0.20μmol/L和0.24μmol/L(S/N=3)。该修饰电极的重现性和稳定性良好,可用于实际样品中亚硝酸盐和亚硫酸盐的同时测定。

关键词：酚酸纳米金修饰电极亚硝酸盐亚硫酸盐

MXenes for perovskite solar cells:Progress and prospects

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Journal of Energy Chemistry 2023年第6期81卷 443-461,I0010页

作者： Lin Yang Peng Li Jiangang Ma xintong Zhang Xiao-Feng Wang Yichun Liu Key Laboratory for UV-Emitting Materials and Technology of Ministry of Education Northeast Normal UniversityChangchun 130024JilinChina Key Laboratory of Physics and Technology for Advanced Batteries(Ministry of Education) College of PhysicsJilin UniversityChangchun 130012JilinChina

Perovskite solar cells(PSCs)have been developed over the past decade as the forefront of the state-of-theart photovoltaic technologies owing to their high efficiency and low cost,where nanostructured functional materials play key roles in performance *** a versatile class of two-dimensional(2D)materials,transition metal carbides/nitrides MXenes have gained enormous attentions in PSCs since 2018 due to their superior properties such as excellent metallic conductivity,abundant surface functional groups,tunable work functions,high optical transparency,and mechanical *** explorations of MXenes are of significance in performance promotion and commercialization expansion of *** such,this review focuses on the diversified advantages of MXenes,comprehensively summarizing their applications and developments in PSCs as additives,electron/hole transporting layers,interfacial engineering layers,and electrodes in sequence and explaining the relevant mechanisms ***,the problems emerged from the related studies are considered and the corresponding suggestions like opening up the type of MXenes usage,taking further insight of the modulation of surface termination groups on Fermi levels,understanding the effect on energy level structures of perovskite or other functional layers,and realizing commercialization,*** provided for the future in-depth *** review is intended to provide overall perspective of the current status of MXenes and highlight the direction for the future advancements in MXenes design and processes towards efficient,stable,large-area,and low-cost PSCs.

关键词： MXenes Two-dimensional materials Perovskite solar cells Photovoltaic technologies Environment

Tunable bismuth doping/loading endows NaTaO_(3)nanosheet highly selective photothermal reduction of CO_(2)

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Nano Research 2023年第2期16卷 2142-2151页

作者： Mengmeng Zhang Changhua Wang Yueyun Wang Songmei Li xintong Zhang Yichun Liu Key Laboratory of Ultraviolet(UV)-Emitting Materials and Technology of Chinese Ministry of Education Northeast Normal UniversityChangchun 130024China

Photothermal CO_(2)reduction with H2O,integrating advantages of photocatalysis driven H2O splitting and thermal catalysis promoted CO_(2)reduction,has drawn sharply increasing attention in artificial synthesis of solar *** photothermal effect of metal nanoparticles facilities CO_(2)hydrogenation and activation of lattice oxygen in oxide photocatalyst promotes H2O oxidation,which is essentially considered for highly efficient photothermal ***,the large thermal conductivity of most metal nanoparticles induces inevitable heat dissipation,restricting the increase of catalyst *** this work,to minimize the heat dissipation,we employ bismuth nanoparticles as photothermal unit,which is of the lowest thermal conductivity in the metal ***,we adopt bismuth doped NaTaO_(3)as photocatalytic unit because of the bismuth doping induced activation of lattice *** bismuth nanoparticles are assembled with bismuth doped NaTaO_(3)through one-step tunable transformation from *** from the photothermal effect,thermal insulation caused by bismuth metal,and lattice oxygen activation by bismuth doping,the NaTaO_(3):Bi hybrid exhibits high photothermal catalytic *** yield of CO over NaTaO_(3):Bi hybrid at 413 K via photothermal catalysis is 141 times higher than that room temperature ***,ultraviolet(UV)light irradiation leads to 89.2%selectivity of CO and visible light irradiation leads to 97.5%selectivity of *** work may broaden the photocatalytic application of ABO_(3)perovskite and provides a novel strategy for the development of photothermal catalysts for artificial photosynthesis.

关键词： CO_(2)reduction photothermal catalytic NaTaO_(3) bismuth high selectivity

Temporal and spatial analysis of vegetation fire activity in the circum-Arctic during 2001–2020

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Research in Cold and Arid Regions 2023年第1期15卷 48-56页

作者： xintong Chen ShiChang Kang YuLing Hu JunHua Yang State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu730000China University of Chinese Academy of Sciences Beijing100049China

Vegetation fires become the concern worldwide due to their substantial impacts on climate and environment,and in particular in the *** vegetation fires and associated emissions and causes can improve understanding of fire regime and provide helpful information for vegetation fires *** this study,satellitebased vegetation fires and emissions during 2001–2020 were investigated and contributions of different types of fires were ***,climate anomalies related to extreme vegetation fires were *** main results showed that the region south of the Arctic circle(50°N-67°N)experienced a greater number of vegetation fires compared to the Arctic(north of 67°N).During 2001–2020,interannual variability of vegetation fires between 50°N and 67°N appeared to be decreasing while emissions(including carbon,dry matter,PM_(2.5),and BC)appeared to be increasing overall,which were contributed by the increasing summer boreal forest fires in this region *** the Arctic,vegetation fires and emissions increased in recent years distinctly,and those were dominated by the summer forest ***,large increases of vegetation fires were located in the eastern Siberia and northern North America while large decreases were located in the northwestern Eurasia ***,in the Arctic,the unprecedented vegetation fires were observed in the eastern Siberia and Alaska in 2019 and in the eastern Siberia in 2020,which could be attributed to high pressure,high near-surface temperature,and low air moisture ***,obvious anticyclonic anomalies in Alaska in 2019 and in the eastern Siberia in 2020 and cyclonic anomalies in the western Siberia in 2019,also played an important role on fire occurrences making drier conditions.

关键词： Circum-Arctic Vegetation fires Emissions Sources Climate

DMPP mitigates N_(2)O and NO productions by inhibiting ammonia-oxidizing bacteria in an intensified vegetable field under different temperature and moisture regimes

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Pedosphere 2024年第3期34卷 652-663页

作者： Xi ZHANG xintong XU Chenyuan WANG Qianqian ZHANG Yubing DONG Zhengqin XIONG Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation College of Resources and Environmental SciencesNanjing Agricultural UniversityNanjing 210095(China) Department of Soil Science of Temperate Ecosystems Department of Agricultural Soil ScienceGeorg-August University of GottingenGottingen 37077(Germany) State Key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityHangzhou 311300(China) Huaiyin Institute of Agricultural Sciences of Xuhuai Region in Jiangsu Jiangsu Academy of Agricultural SciencesHuai’an 223001(China)

Vegetable soils with high nitrogen input are major sources of nitrous oxide(N_(2)O)and nitric oxide(NO),and incorporation of the nitrification inhibitor 3,4-dimethylpyrazole phosphate(DMPP)into soils has been documented to effectively reduce ***,the efficiency of DMPP in terms of soil N_(2)O and NO mitigations varies greatly depending on soil temperature and moisture ***,further evaluations of DMPP efficiency in diverse environments are required to encourage widespread application.A laboratory incubation study(28 d)was established to investigate the interactive effects of DMPP,temperature(15,25,and 35?C),and soil moisture(55% and 80% of water-holding capacity(WHC))on net nitrification rate,N_(2)O and NO productions,and gene abundances of nitrifiers and denitrifiers in an intensive vegetable *** showed that incubating soil with 1%DMPP led to partial inhibition of the net nitrification rate and N_(2)O and NO productions,and the reduction percentage of N_(2)O production was higher than that of NO production(69.3%vs.38.2%)regardless of temperature and soil moisture *** increased temperatures promoted the net nitrification rate but decreased soil N_(2)O and NO *** moisture influenced NO production more than N_(2)O production,decreasing with the increased moisture level(80%).The inhibitory effect of DMPP on cumulative N_(2)O and NO productions decreased with increased temperatures at 55%***,the inhibitory effect of DMPP on cumulative N_(2)O production increased with increased temperatures at 80%*** on the correlation analyses and automatic linear modeling,the mitigation of both N_(2)O and NO productions from the soil induced by DMPP was attributed to the decreases in ammonia-oxidizing bacteria(AOB)amoA gene abundance and NO_(2)^(-)-N ***,our study indicated that DMPP reduced both N_(2)O and NO productions by regulating the associated AOB amoA gene abundance and NO_(2)^(-)-N concentra

关键词： 3,4-dimethylpyrazole phosphate environment condition gene abundance nitrification inhibitor nitrite accumulation soil water content

Investigation on effect of semiconducting screen on space charge behaviour of polypropylene-based polymers for HVDC cables

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High Voltage 2022年第5期7卷 968-981页

作者： Mingyu Zhou Haitian Wang xintong Ren George Chen Yi Luo Fan Yu Global Energy Interconnection Research Institute Europe GmbH BerlinGermany The Tony Davies High Voltage Laboratory University of SouthamptonSouthamptonHampshireUK Global Energy Interconnection Research Institute Co. Ltd.BeijingChina

High voltage direct current(HVDC)power transmission cable is critical for realising sustainability through renewable energy ***-friendly thermoplastic polypropylene(PP)-based polymers/nanocomposites are regarded as promising candidates for replacing current thermoset crosslinked polyethylene(XLPE)*** an essential component of the extruded HVDC cable for improving conductor/insulation interface and suppressing charge injection to insulation at high DC electrical stresses,developing semiconducting(SC)screens that are compatible with PP-based insulation is of similar importance but has not been well studied *** work aims at designing PP-based semiconducting screens and investigating space charge behaviours of SC/PP/SC sandwich specimen to unfold the effect of semiconducting materials,bonding methods,applied DC electric field,and temperature on charge injection,accumulation,transportation,and dissipation in PP-based *** conventional thermal,mechanical,and low field electrical characterisations demonstrated that all of the developed semiconducting materials meet the performance criteria of commercial semiconducting materials,their space charge and local electric field distribution varied significantly at high DC *** with the traditional non-bonded configuration used at lab-scale,charge injection was enhanced in hot-pressed SC/PP/SC samples with tightly bonded interfaces,which better reflects the real situation in extruded *** temperature further intensified charge ***,our results also revealed that high temperature and electric field strongly influence charge mobilities and consequently their distribution and local electric field in PP-based insulations.

关键词： charge insulation effect

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基于康达效应的高速气流推力矢量喷管

中山大学学报（自然科学版）（中英文） 2025年第1期64卷 265-274页

作者：姚清河王思淼杨耿超白欣彤李明洋王昱森中山大学航空航天学院广东深圳518107

基于康达效应设计了一种高速气流推力矢量喷管,利用其对流体的偏转作用实现主流方向控制。喷管由主通道以及外侧八个独立气室和出口处的康达壁面组成,可通过气室外部的开合情况来实现八个偏转方向的控制。本文对所设计的高速气流推力矢... 详细信息

基于康达效应设计了一种高速气流推力矢量喷管,利用其对流体的偏转作用实现主流方向控制。喷管由主通道以及外侧八个独立气室和出口处的康达壁面组成,可通过气室外部的开合情况来实现八个偏转方向的控制。本文对所设计的高速气流推力矢量喷管进行了仿真计算,研究了主流速度、气室开合情况及康达壁面曲率三个参数对主流偏转效果的影响。数值模拟结果表明:(1)主流速度在50~160 m/s时,不同的开合组合的偏转效果有较为显著的差异。(2)气室打开数量为奇数时,偏转效果优于偶数。只有一个气室开口时,偏转效果最优。(3)计算得到三维喷管最优康达壁面的曲率是55.26。本文设计的高速气流推力矢量喷管能够达到较好的偏转控制效果,最大偏转角度可达到85.91°。

关键词：康达效应高速气流推力矢量喷管气流偏转

Study on Phosphating by Ultrasonic Wave at Room Temperature for Sintered NdFeB Magnet

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稀有金属材料与工程 2012年第S1期41卷 260-262页

作者： Sun Shuo Zhang Youping Yu xintong Wang Yong Lou Guiyan Shenyang Univ Technol Sch Sci Shenyang 110870 Peoples R China Chinese Acad Sci Inst Met Res State Key Lab Corros & Protect Shenyang 110016 Peoples R China

The corrosion behavior of a NdFeB magnet obtained at room temperature,with and without ultrasonic were *** corrosion resistance was investigated by corrosion immersion tests in 3 wt%neutral NaCl solutions,potentiodynamic polarization tests and electrochemical impedance spectroscopy(EIS).The morphology of the conversion coatings on NdFeB surface were analyzed by scanning electron microscopy(SEM).And the forming mechanism of coatings was studied by potential-time *** tests of corrosion resistances show that the combination of phosphating treatment with ultrasonic will further improve the corrosion resistance of the *** SEM also confirms that phosphating coating under ultrasonic is more homogeneous and compact.

关键词： sintered NdFeB magnet phosphating ultrasonic wave corrosion resistance