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Degradation of superhydrophobic aluminium overhead line conductor surfaces

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High Voltage 2024年第4期9卷 763-772页

作者： Xu Zhang chorphaka Plaengpraphan chengxing Lian Wenyuan Li Qinghua han Simon m.Rowland Ian cotton Qi Li School of Engineering University of WarwickCoventryUK State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong UniversityXi'anChina School of Engineering University of ManchesterManchesterUK School of Engineering Imperial College LondonLondonUK Electrical Engineering School Chongqing UniversityChongqingChina

It has been shown that noise emissions from HV overhead line conductors can be reduced under rain conditions by making their surfaces *** working environment makes ensuring the longevity of any treatment a major *** degradation of various superhydrophobic surfaces generated by applying a superhydrophobic coating and patterning microscale channels is assessed under an Ac electric field(18 kV/cm)with continuous water *** examining the droplet distribution on the surfaces during the degradation and the surface roughness before and after degra-dation,the authors demonstrate that no water droplets were found on the microscale patterned surface,but droplets were formed on the coated surface after *** surface roughness reduction of the coated surface and microscale patterned surface was 29.8% and 11.3%,respectively,indicating that the microscale patterned surface has better durability than the superhydrophobic coating under the Ac electric stress.

关键词： coating roughness surface

Assessing the Performance of a Dynamical Downscaling Simulation Driven by a Bias-corrected cmIP6 Dataset for Asian climate

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Advances in Atmospheric Sciences 2024年第5期41卷 974-988页

作者： Zhongfeng XU Ying han meng-Zhuo ZhanG chi-Yung TAm Zong-Liang YANG Ahmed m.EL KENAWY congbin FU Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China School of Atmospheric Sciences Nanjing UniversityNanjing 210093China Earth System Science Programme The Chinese University of Hong KongHong KongChina Department of Geological Sciences Jackson School of GeosciencesThe University of Texas at AustinAustinTexasUSA Instituto Pirenaico de Ecología Consejo Superior de Investigaciones Científicas(CSIC)Campus de Aula Dei1005Zaragoza 50059Spain Department of Geography Mansoura UniversityMansoura 35516Egypt

In this study,we aim to assess dynamical downscaling simulations by utilizing a novel bias-corrected global climate model(Gcm)data to drive a regional climate model(Rcm)over the Asia-western North Pacific *** simulations were conducted with a 25-km grid spacing for the period 1980–*** first simulation(WRF_ERA5)was driven by the European centre for medium-Range Weather Forecasts Reanalysis 5(ERA5)dataset and served as the validation *** original Gcm dataset(mPI-ESm1-2-HR model)was used to drive the second simulation(WRF_Gcm),while the third simulation(WRF_Gcmbc)was driven by the bias-corrected Gcm *** bias-corrected Gcm data has an ERA5-based mean and interannual variance and long-term trends derived from the ensemble mean of 18 cmIP6 *** demonstrate that the WRF_Gcmbc significantly reduced the root-mean-square errors(RmSEs)of the climatological mean of downscaled variables,including temperature,precipitation,snow,wind,relative humidity,and planetary boundary layer height by 50%–90%compared to the WRF_***,the RmSEs of interannual-tointerdecadal variances of downscaled variables were reduced by 30%–60%.Furthermore,the WRF_Gcmbc better captured the annual cycle of the monsoon circulation and intraseasonal and day-to-day *** leading empirical orthogonal function(EOF)shows a monopole precipitation mode in the WRF_*** contrast,the WRF_Gcmbc successfully reproduced the observed tri-pole mode of summer precipitation over eastern *** improvement could be attributed to a better-simulated location of the western North Pacific subtropical high in the WRF_Gcmbc after Gcm bias correction.

关键词： bias correction multi-model ensemble mean dynamical downscaling interannual variability day-to-day variability validation

Evaluating transient behaviour of large-scale photovoltaic systems during lightning events using enhanced finite difference time domain method with variable cell size approach

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High Voltage 2024年第3期9卷 636-647页

作者： Ibrahim Hetita Diaa-Eldin A.mansour Yang han Ping Yang congling Wang mohamed m.F.Darwish matti Lehtonen Amr S.Zalhaf School of mechanical and Electrical Engineering University of Electronic Science and Technology of China(UESTC)ChengduChina Electrical Power and machines Engineering Department Faculty of EngineeringHelwan UniversityCairoEgypt Electrical Power and machines Engineering Department Faculty of EngineeringTanta UniversityTantaEgypt Department of Electrical Power Engineering Faculty of EngineeringEgypt-Japan University of Science and TechnologyAlexandriaEgypt Department of Electrical Engineering Faculty of Engineering at ShoubraBenha UniversityCairoEgypt Department of Electrical Engineering and Automation School of Electrical EngineeringAalto UniversityEspooFinland

Photovoltaic(PV)arrays are usually installed in open areas;hence,they are vulnerable to lightning strikes that can result in cell degradation,complete damage,service disruption,and increased maintenance *** a result,it is imperative to develop an effective and efficient lightning protection system by evaluating the transient behaviour of PV arrays during lightning *** aim is to evaluate the transient analysis of large-scale PV systems when subjected to lightning strikes using the finite difference time domain(FDTD)*** overvoltages are calculated at various points within the mounting *** optimise the FDTD method's execution time and make it more suitable for less powerful hardware,a variable cell size approach is ***,larger cell dimensions are used in the earthing system and smaller cell dimensions are used in the mounting *** FDTD method is utilised to calculate the temporal variation of transient overvoltages for large-scale PV systems under different scenarios,including variations in the striking point,soil resistivity,and the presence of a metal *** results indicate that the highest transient overvoltages occur at the striking point,and these values increase with the presence of a PV metal frame as well as with higher soil ***,a comparison is performed between the overvoltage results obtained from the FDTD approach and the partial element equivalent circuit(PEEc)method at the four corner points of the mounting systems to demonstrate the superior accuracy of the FDTD ***,a laboratory experiment is conducted on a small-scale PV system to validate the simulation *** calculated overvoltages obtained from the FDTD and PEEc methods are compared with the measured values,yielding a mean absolute error of 5%and 11%for the FDTD and PEEc methods,respectively,thereby confirming the accuracy of the FDTD simulation model.

关键词： transient behaviour finite

In situ probing of electron transfer at the dynamic moS_(2)/graphene–water interface for modulating boundary slip

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Nano Research 2024年第8期17卷 7513-7521页

作者： Yishu han Dameng Liu State Key Laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijing 100084China

The boundary slip condition is pivotal for nanoscale fluid *** research has primarily focused on simulating the interaction mechanism between the electronic structure of two-dimensional materials and slip of water at the nanoscale,raising the possibility for ultralow friction flow of water at the ***,experimentally elucidating electronic interactions at the dynamic solid–liquid interface to control boundary slip poses a significant *** this study,the crucial role of electron structures at the dynamic solid–liquid interface in regulating slip length was ***,the slip length of water on the molybdenum disulfide/graphene(moS_(2)/G)heterostructure(100.9±3.6 nm)significantly exceeded that of either graphene(27.7±2.2 nm)or moS_(2)(5.7±3.1 nm)*** was also analyzed how electron transfer significantly affected interface *** electrons played a crucial role in determining the type and proportion of excitons at both moS_(2)–water and moS_(2)/G–water ***,by applying voltage,distinct photoluminescence(PL)responses at static and dynamic interfaces were discovered,achieving a 5-fold modulation in PL intensity and a 2-fold modulation in the trion to exciton intensity *** electrons transfer from the top graphene to the bottom moS_(2)at the moS_(2)/G–water interface,reducing surface charge ***,the reduction of electrostatic interactions between the solid and water leads to an increased slip length of water on the moS_(2)/G *** process aids in comprehending the origin of frictional resistance at the subatomic *** work establishes a foundation for actively controlling and designing of fluid transport at the nanoscale.

关键词： two-dimensional materials solid-liquid interface photoluminescence excitons electron transfer slip length

A near-complete cucumber reference genome assembly and cucumber-DB,a multi-omics database

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molecular Plant 2024年第8期17卷 1178-1182页

作者： Jiantao Guan han miao Zhonghua Zhang Shaoyun Dong Qi Zhoul Xiaoping Liu Diane m.Beckles Xingfang Gul Sanwen Huang Shengping Zhang State Key Laboratory of Vegetable Biobreeding Institute of Vegetables and FlowersChinese Academy of Agricultural SciencesBeijing 100081China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhenChina Engineering Laboratory of Genetic Improvement of Horticultural crops of Shandong Province College of HorticultureQingdao Agricultural UniversityQingdao266109China Department of Plant Sciences University of CaliforniaDavisOne Shield AvenueDavisCA95616USA

Dear Editor,cucumber(cucumis sativus)is a key vegetable crop and an essential model for genetics and genomics research in cucurbitaceae,especially in studies on plant sex determination and vascular *** the first sequenced genome among vegetable crops,the cucumber reference genome has been a crucial genetic resource for comparative genomics and genetic ***,the latest version of the cucumber *** Long reference genome(cLv3.0),generated using PacBio long-reads data,is *** a predicted genome size of 350-367 mb,cLv3.0 encompasses only 226.2 mb,leaving 72 gaps and over 120 mb of unknown *** low assembly completeness(approximately 62%)is primarily due to the high proportion(~30%)of heterochromatic satellite and rDNA sequences in cucumber,substantially higher than that observed in many other species such as Arabidopsis,rice,maize,and watermelon,where it is less than 5%(han et al.,2008;Huang et al.,2009;Li et al.,2019).

关键词： crops incomplete cucumber

Enhancing visible-light-driven NO oxidation through molecular‐level insights of dye-loaded sea sands

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Rare metals 2024年第2期43卷 543-554页

作者： Yu-han Li Bang-Fu chen Sónia A.c.carabineiro You-Yu Duan Ping Tan Wing-Kei Ho Fan Dong Engineering Research center for Waste Oil Recovery Technology and Equipment Ministry of EducationChongqing Key Laboratory of Catalysis and New Environmental MaterialsChongqing Technology and Business UniversityChongqing400067China Nanchang Institute of Technology Nanchang33044China LAQV-REQUImTE Department of ChemistryNOVA School of Science and TechnologyUniversidade NOVA de Lisboa2829-516CaparicaPortugal college of Physics and center of Quantum materials and Devices Chongqing UniversityChongqing401331China Department of Science and Environmental Studies The Education University of Hong KongHong Kong999077China

Natural minerals,abundant and easily obtained through simple physical processing,offer a cost-effective and environmentally friendly solution for dyeing wastewater disposal and air pollution *** study investigates the photocatalytic removal of NO using natural different types of dyes,loaded on natural sand,under visible light *** examining various coating concentrations of dyes and sand weights,we discovered that sand loaded with Rhodamine B(RhB)exhibits high activity for the photo-oxidation of NO.A combination results of X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),Fourier transform infrared spectroscopy(FTIR)and thermogravimetric(TG)analyses confirm the presence of SiO_(2),cacO_(3),Al_(2)O_(3)and iron oxides as the main components of the ***,studying RhB-loaded individual components reveals that cacO_(3)plays a crucial role in enhancing the NO removal *** results and theoretical calculations demonstrate the establishment of a directional charge transfer channel from cacO_(3)to RhB,facilitating the adsorption and activation of molecular NO and O_(2).This work not only promotes the utilization of natural mineral resources but also enriches the fields of environmental photochemistry and semiconductor photocatalysis.

关键词： Sand dyes Rhodamine B Photo-oxidation of NO Visible light illumination

Facet-dependent cuO/{010}BiVO_(4)S-scheme photocatalyst enhanced peroxymonosulfate activation for efficient norfloxacin removal

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Journal of materials Science & Technology 2024年第7期174卷 30-43页

作者： Tongyu han Haifeng Shi Yigang chen School of Science Jiangnan UniversityWuxi 214122China Department of General Surgery Jiangnan University Medical CenterWuxi 214002China

Rapid recombination of charge carriers and sluggish cu^(2+)/cu^(+)conversion rate in cu-based photocatalysts hinder the improvement of the peroxymonosulfate(PmS)activation ***,a novel S-scheme system was successfully built through hydrothermal and in-situ calcination methods to activate PmS for norfloxacin(NOR)degradation,which combined cuO with BiVO_(4)(BVO)containing surface *** UV-vis spectra manifested that BVO displayed excellent visible light absorption performance after compounding with cuO,and the light absorption threshold of cuO/BVO was about 600 *** to the existence of surface heterojunction in BVO,the photoinduced electrons,and holes would trans-fer to{010}and{110}facets,*** construction of S-scheme heterojunction further facilitated the accumulation of electrons on cuO,thus realizing the spatial separation of charge *** addi-tion,the electrons gathered on the cuO expedited the cu^(2+)/cu^(+)cycle,thereby improving the activation efficiency of *** this basis,the NOR removal capacity of 5cuO/BVO composites was obviously en-hanced,which was 3.65 and 2.45 times that of cuO and ***,the influence of ambient pH and PmS dosage on the photocatalytic performance of cuO/BVO was *** the analysis of NOR degradation pathways and degradation products,it was found that the toxicity threat of NOR to the environment was reduced during the degradation *** to the XPS results,forming the S-scheme heterojunction accelerated the cu^(2+)/cu^(+)redox cycle during the PmS activating ***,photoluminescence(PL)and time-resolved photoluminescence(TRPL)analysis demonstrated that the cuO/BVO composites exhibited eminent ability for charge *** possible mechanism of charge transfer was assumed by exploring reactive species and the energy band structure of *** sum up,this research provides a new perspective on boosting PmS activation to purify antibiotics

关键词： Norfloxacin degradation Peroxymonosulfate S-scheme heterojunction Surface heterojunction charge separation

Divalent anion intercalation and etching-hydrolysis strategies to construct ultra-stable electrodes for seawater splitting

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Science china chemistry 2024年第2期67卷 687-695页

作者： Jiajia Lu Yang Liu han-Pu Liang Key Laboratory of Biofuels Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao266101China Henan Provincial Key Laboratory of Nanocomposites and Applications Institute of Nano-Structured Functional MaterialsHuanghe Science and Technology CollegeZhengzhou450006China School of materials Science and Engineering Henan Normal UniversityXinxiang453007China center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China Shandong Energy Institute Qingdao266101China

Developing stable electrodes for seawater splitting remains a great challenge due to the detachment of catalysts at a large operating current and severe anode corrosion caused by ***,divalent anion intercalation and etching-hydrolysis strategies are deployed to synthesize the ultra-stable anode,dendritic Fe(OH)_(3) grown on Ni(SO_4)_(0.3)(OH)_(1.4)–Ni(OH)_(2).Experimental results reveal that the anode exhibits good activity and excellent stability in alkaline simulated *** 500 h,the current density operated at 1.72 V remains 99.5%,about 210 m A cm^(-2).The outstanding stability originates from the etchinghydrolysis strategy,which strengthens the interaction between the catalyst and the carrier and retards thus the detachment of catalysts at a large current ***,theoretical simulations confirm that the intercalated divalent anions,such as SO_4^(2-) and cO_(3)^(2-),can weaken the adsorption strength of chlorine on the surface of catalysts and hinder the coupling and hybridization between chlorine and nickel,which slows down the anode corrosion and improves catalytic ***,the twoelectrode system shows the remarkable 95.1% energy efficiency at 2,000 A m-2and outstanding stability in 6 mol L^(-1) KOH +seawater at 80 ℃.

关键词： seawater splitting stability divalent anion intercalation etching-hydrolysis

Innovative construction of macroporous–mesoporous structured spherical alumina and its hydrothermal stability

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Particuology 2024年第7期90卷 429-435页

作者： Yufan mo chunli Li Huiyu Li Wei han He Wen Yinghong han chunxia che Yongjun Feng State Key Laboratory of chemical Resource Engineering Beijing Engineering Center for Hierarchical CatalystsCollege of ChemistryBeijing University of Chemical TechnologyBeijing100029China Lanzhou Petrochemical Research center Petrochemical Research InstitutePetroChinaLanzhou730060China

The pore structure of spherical alumina supports is closely related to the dispersion of catalytically active components and the diffusion of *** excellent pore structure under strict reaction conditions is of utmost *** this work,sphericalγ-Al_(2)O_(3)support with a bimodal pore structure,composed of macropores and mesopores,was successfully synthesized using dodecane as the pore-forming agent through the oil–ammonia column-shaping *** morphology and internal pore structure of the alumina were found to be influenced by the amount of surfactant added and ultrasound treatment ***,when concentration of surfactant was 4‰and ultrasound voltage of 20 V was applied,the resultingγ-Al_(2)O_(3)-4‰-20 displayed a highly concentrated distribution of macropores with an average pore size of 100 nm,resulting in an impressive porosity of 69.21%.In contrast,the untreated sample ofγ-Al_(2)O_(3)-0-0 only exhibited a mesoporous distribution with a porosity of 54.03%.moreover,after being subjected to a hydrothermal treatment in a high temperature(600°c)and high humidity(water vapor)environment for 120 h,theγ-Al_(2)O_(3)-4‰-20 sample maintained a high BET specific surface area of 170.9 m^(2)g^(−1)and mercury intrusion porosimetry specific surface area of 263.3 m^(2)g^(−1).

关键词： Spherical alumina supports Pore-forming agent Oil-ammonia column shaping method Hydrothermal treatment Hydrothermal stability