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Mechanical pressing method for making high-quality perovskite single crystals

Journal of Semiconductors 2023年第11期44卷 1-4页

作者： Chenglin Wang Jie Sun Jiangzhao Chen Cong Chen Liming Ding State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Materials Science and EngineeringHebei University of TechnologyTianjin 300401China Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China Macao Institute of Materials Science and Engineering(MIMSE) Macao University of Science and TechnologyMacao 999078China

Halide perovskites show excellent photovoltaic properties[1−4].However,the preparation of high-quality perovskite crystals remains a great challenge,which limits their *** materials applied to photodetectors mainly include polycrystalline thin films and single *** solution methods are used to prepare polycrystalline thin films,and the films are full of defects such as voids and grain boundaries[5−7].Compared to polycrystalline thin films,perovskite single crystals possess high crystallinity and low defect density[8−10].Photodetectors based on perovskite single crystals exhibit excellent performance[11].However,the size limitation of single crystals hinders their application in photodetectors[12].

关键词： perovskite polycrystalline hinder

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Novel titanium vanadate with superior Na^(+) transport kinetics for rapid charging and low-temperature sodium ion batteries

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Green Energy & Environment 2025年第2期10卷 374-381页

作者： Dan Lv Liehao Wei Cheng Wang Mingyue Wang Zhongchao Bai Yameng Fan Dongdong Wang Nana Wang Jian Yang Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education) School of Materials Science and EngineeringTianjin UniversityTianjin300072China Key Laboratory of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShandong UniversityJinan250100China Tianjin Key Lab of Indoor Air Environmental Quality Control School of Environmental Science and TechnologyTianjin UniversityTianjin300072China Institute for Superconducting and Electronic Materials University of WollongongWollongongAustralia Institute of Energy Materials Science(IEMS) University of Shanghai for Science and Technology516 Jungong RoadShanghai200093China

Sodium-ion batteries(SIBs)hold great promise for large-scale energy storage in the post-lithium-ion battery era due to their high rate performance and long lifespan,although their sluggish Na^(+) transformation kinetics still require *** by the excellent electrochemical performance of titanium-based anode materials,here,we present a novel titanium vanadate@carbon(TVO@C)material as anode for *** TVO@C material is synthesized via a facile coprecipitation method,with the following annealing process in an acetylene *** opened ion channel and the oxygen vacancies within TVO@C facilitate the diffusion of Na^(+) ions,reducing their diffusion ***,an ultrahigh rate of 100 A g^(-1)and long life of 10,000 cycles have been ***,the TVO@C electrode exhibits stable performance,not only at room temperature,but also at temperatures as low as 20 *** TVO@CjjNa_(3)V_(2)(PO_(4))_(3)@C full cells have also achieved stable discharge/charge for 500 *** is believed that this strategy provides new insight into the development of advanced electrodes and provides a new opportunity for constructing novel high rate electrodes.

关键词： Anode High rate Titanium vanadate Sodium ion batteries

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The iron-based biochar activating chlorite(ClO_(2)^(−))driven by mechanochemical ultrasonic:piecewise kinetics,biomimetic catalytic-mechanism,and novel advanced redox process

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Frontiers of environmental science & engineering 2025年第2期19卷 151-168页

作者： Qihui Xu Qianhui Yang Yuming Xie Lin Hu Zhenghao Fei Hong You School of Chemical and Environmental Engineering Yancheng Teachers UniversityYancheng 224007China State Key Laboratory of Urban Water Resources and Environment Harbin Institute of TechnologyHarbin 150090China School of Marine Science and Technology Harbin Institute of Technology at WeihaiWeihai 264209China

Chlorite(ClO_(2)^(−)or COI)is used to establish the advanced reduction and oxidation process(AROP).The iron/biochar-based particles(iron-based hydrothermal carbon with hinge-like structure,FebHCs,20 mg/L)can be utilized to activate COI(2 mmol/L)to present selective oxidation in removing triphenylmethane derivatives(15 min,90%).The protonation(H+at~102μmol/L level)played a huge role(k-2nd=0.136c-H+−0.014(R^(2)-adj=0.986),and rapp=−0.0876/c-H++1.017(R^(2)-adj=0.996))to boost the generation of the active species(e.g.,high-valent iron oxidizing species(HVI=O)and chlorine dioxide(ClO_(2))).The protonation-coupled electron transfer promoted Fe-substances in Feb/HCs activating COI(the calculated kobs ranging from 0.066−0.285 min^(−1)).The form of ClO_(2) mainly attributed to proton-coupled electron transfer(1e/1H+).The HVI=O was generated from the electron transfer within the coordination ***,carbon particles in FebHCs serve as the bridge for electron *** above roles contribute to the fracture and formation of coordination-induced bonds between Lx-FeII/III and ClO_(2)^(−)at phase interface to form *** ultrasonic(US)cavitation enhanced the mass transfer of active species in bulk solution,and the HVI=O and ClO_(2) attack unsaturated central carbon atoms of triphenylmethane derivatives to initiate selective ***,the scale-up experiment with continuous flow(k values of approximately 0.2 min^(−1),COD removal efficiency of approximately 80%)and the reactor with COMSOL simulation have also proved the applicability of the *** study offers a novel AROP and new insights into correspondingly heterogeneous interface activation mechanisms.

关键词： Chlorite Iron-based biochar Ultrasonic Chlorine dioxide High-valent iron oxidizing species

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Three-dimensional lightweight melamine foams modified by MXene sheets and CoNi alloys towards multifunctional microwave absorption

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Nano Research 2025年第2期18卷 377-389页

作者： Nannan Wu Zhengying Shen Yitao Ma Zhizheng Wu Chuanxin Hou Sijie Guo Jian Tian Jiurong Liu School of Material Science and Engineering Shandong University of Science and TechnologyQingdao 266590China School of Mathematics and Systems Science Shandong University of Science and TechnologyQingdao 266590China School of Environmental and Material Engineering Yantai UniversityYantai 264005China Department of Chemical&Biomolecular Engineering University of TennesseeKnoxvilleTN 37996USA Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education and School of Materials Science and EngineeringShandong UniversityJinan 250061China

Taking the increasing issue of electromagnetic waves(EMW)pollution and the necessity for applications in extreme environments,there is a pressing requirement to create multifunctional microwave absorption materials(MAMs)to meet the current *** this work,we achieved the successful combination of MXene sheets and metal organic framework(MOFs)derived CoNi@C magnetic alloys onto the three dimensional(3D)melamine foam(MF)skeleton using vacuum impregnation and electrostatic self-assembly *** obtained MF@MXene/CoNi@C composite foams achieved outstanding MA performance,with an optimal reflection loss(RL)value of–24.1 dB and a maximum effective absorption bandwidth(EAB)of 6.88 GHz at a thickness of 1.68 mm,effectively covering the whole Ku *** superior MA performance is ascribed to the composite foams’multi-component architecture,distinctive 3D porous structure,and the synergistic impact of multiple loss ***,the MF@MXene/CoNi@C composite foams demonstrate exceptional photothermal conversion,thermal insulation,and infrared stealth capabilities,effectively coping with the demands of applications in extreme *** work serves as a valuable resource and source of inspiration for the development of lightweight broadband,multifunctional efficient MAMs.

关键词： multifunctional microwave absorption MXene thermal insulation infrared stealth

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Enhanced nitrogen removal from low strength anaerobic membrane bioreactor(AnMBR)permeate using complete nitrification and partial denitrification-anammox processes

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Frontiers of environmental science & engineering 2024年第12期18卷 153-166页

作者： Jingwei Fu Zhaoyang Hou Hexiang Zhao Qian Li Rong Chen Yu-You Li Key Laboratory of Environmental Engineering Shaanxi ProvinceXi’an University of Architecture and TechnologyXi’an 710055China Hualu Engineering&Technology Co. Ltd.Xi’an 710000China International Science&Technology Cooperation Center for Urban Alternative Water Resources Development Key Laboratory of Northwest Water ResourceEnvironment and EcologyMOEXi’an University of Architecture and TechnologyXi’an 710055China Department of Civil and Environmental Engineering Graduate School of EngineeringTohoku UniversitySendai Miyagi 980-8579Japan

In this study,an anaerobic membrane bioreactor coupled with a complete nitrification and partial denitrification-anammox process(AnMBR-NF-PDA)was developed to efficiently remove both chemical oxygen demand(COD)and *** control of raw water ratios was utilized to adjust the ratio of COD/NO_(3)^(-)-N,resulting in maximum nitrogen removal efficiency of 90.14% at a ratio of ***,specific anammox activity(SAA)increased with the proportion of raw water,peaking at 17.83 mg-N/(g-VSS∙d)in stage Ⅱ before *** variation was attributed to the significant presence of filamentous bacteria,especially“Acinetobacter”(13.58%-31.59%),which facilitated nitrite generation,supporting the nitrous oxide hypothesis in partial denitrification processes and enabling cross-feeding with ***,the average particle size of granular sludge increased from 300 to 528μm under the influence of filamentous *** analysis revealed an upsurge in genes associated with partial denitrification(NarG and NapA)as the COD/NO_(3)-N ratio *** abundance of genes closely correlated with anammox(Hzs and Hdh)peaked during stage Ⅱ,indicating the beneficial role of filamentous bacteria in the stable conversion of nitrite in PDA *** study offers valuable insights into optimizing the synergistic metabolism and granulation processes involving filamentous bacteria and AnAOB,thereby laying the groundwork for the practical application of AnMBR coupled with anammox processes in wastewater treatment.

关键词： Anammox Anaerobic membrane bioreactor COD/NO_(3)^(-)-N Filamentous bacteria

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The impact of Cu content on crystallization kinetics and soft magnetic properties for ductility FePCCu amorphous alloy

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Progress in Natural science: Materials International 2025年第3期35卷 560-567页

作者： Jiang, Xiangxiang Liu, Cong Luo, Hongzhi Ding, Jing Zuo, Mingqing Yang, Chen Dai, Xuefang Zhu, Shengli Liu, Guodong State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Materials Science and Engineering Hebei University of Technology Tianjin300130 China School of Energy and Machinery Dezhou University Dezhou253023 China College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy Hunan University Hunan Changsha410082 China School of Materials Science and Engineering Tianjin University Tianjin30072 China School of Materials Science and Engineering Lanzhou Jiaotong University Lanzhou730070 China

Effects of trace addition of Cu in ductility Fe83−xP11C6Cux (x = 0.7–1 at. %) amorphous alloys on the crystallization kinetics, soft magnetic properties and hardness were investigated. With Cu content increasing, the Curie temperature (Tc) and initial crystallization onset temperature (Tx1) increase at first and then drop. The nucleation process becomes hard with the increasing of Cu content, and it is more difficult than growth process. The Fe82.3P11C6Cu0.7 amorphous ribbon demonstrates high saturation magnetization (Bs) of 1.63 T, low coercivity (Hc) of 5.2 A/m, and high initial permeability (μi) of 15,000, alongside Vickers hardness (Hv) exceeding 760 and excellent bending ductility. Annealing-induced [amorphous + α-Fe] phase in Fe82.3P11C6Cu0.7 has good soft magnetic properties, with Bs of 1.66 T, Hc of 9.7 A/m, μi of 16,000, and Hv over 1300. Notably, only nanocrystalline α-Fe phase precipitation is observed in its ribbon after annealing at Tx2-50 K (Tx2, second crystallization onset temperature). At the same time the sample has good flexibility. Fe-based amorphous/nanocrystalline alloys can be as promising option for commercial applications because of their remarkable soft magnetic properties, cost-effectiveness, and exceptional bending ductility. © 2025 Chinese Materials Research Society

关键词： Ductility

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The Law of Secondary Electron Multiplication of Aluminum under Different Frequency Microwaves 9

The Law of Secondary Electron Multiplication of Aluminum und...

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9th IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, MAPE 2022

作者： Shang, Shengfei Yang, Xiaoning Yang, Yong Bi, Yanqiang Wu, Nankai Li, Xiyuan Beijing Institute of Spacecraft Environment Engineering National Key Laboratory of Science and Technology on Reliability and Environmental Engineering Beijing China

ISBN: (数字)9781665427753

ISBN: (纸本)9781665427753

In this paper, the discharge phenomena of aluminum materials under the action of strong electromagnetic waves are investigated. The electron multiplication phenomenon of aluminum surface under different amplitude of microwave at 1GHz-300GHz was calculated using 1D3V simulation framework. It shows that the easiest discharge interval of aluminum is about 0.05MV/m-8.5MV/m at 1GHz and about 20MV/m-1700MV/m at 300GHz, and the easiest discharge interval increases with the frequency and follows nearly a linear power law. © 2022 IEEE.

关键词： Aluminum

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Fe doping 1T phase MoS_(2)with enhanced zinc-ion storage ability and durability for high-performance aqueous zinc-ion batteries

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Rare Metals 2025年第1期44卷 253-263页

作者： Jing-Yi Liu Rong-Jie Zhe Zhan-Hong Peng Yi-Hui Song Lin-Xuan Yang Chen Qing Jun-Ling Guo Jin-Ping Liu Yunnan Key Laboratory of Opto-Electronic Information Technology College of Physics and Electronic Information TechnologyYunnan Normal UniversityKunming 650000China Country State Center for International Cooperation on Designer Low-Carbon and Environmental Materials School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China School of Chemistry Chemical Engineering and Life ScienceState Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China

As a promising cathode material for aqueous zinc-ion batteries,1T-MoS_(2)has been extensively investigated because of its facile two-dimensional ion-diffusion channels and high electrical ***,the limited number of available Zn storage sites,i.e.,limited capacity,hinders its application because the inserted Zn^(2+),which form strong electrostatic interactions with 1T-MoS_(2),preventing subsequent Zn^(2+)***,the approach of enlarging the interlayer distance to reduce electrostatic interactions has been commonly used to enhance the capacity and reduce Zn^(2+)migration ***,an enlarged interlayer spacing can weaken the van der Waals force between 1T-MoS_(2)monolayers,easily disrupting the structural ***,to address this issue,an effective strategy based on Fe doping is proposed for 1T-MoS_(2)(Fe-1T-MoS_(2)).The theoretical calculations reveal that Fe doping can simultaneously moderate the rate of decrease in the adsorption energy after gradually increasing the number of stored atoms,and enhance the electron delocalization on metal-O ***,the experiment results show that Fe doping can simultaneously activate more Zn storage sites,thus enhancing the capacity,and stabilize the structural stability for improved cycling ***,Fe-1T-MoS_(2)exhibits a larger capacity(189 mAh·g^(-1)at 0.1 A·g^(-1))and superior cycling stability(78%capacity retention after 400 cycles at 2 A·g^(-1))than pure 1T-MoS_(2).This work may open up a new avenue for constructing high-performance MoS_(2)-based cathodes.

关键词： Aqueous zinc-ion battery 1T-MoS_(2) Fe doping More Zn storage sites Enhanced structural stability

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Novel quantitative structure activity relationship models for predicting hexadecane/air partition coefficients of organic compounds

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Journal of environmental sciences 2023年第2期35卷 98-104页

作者： Ya Wang Weihao Tang Zijun Xiao Wenhao Yang Yue Peng Jingwen Chen Junhua Li State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Key Laboratory of Industrial Ecology and Environmental Engineering(MOE) School of Environmental Science and TechnologyDalian University of TechnologyLinggong Road 2Dalian 116024China

Predicting the logarithm of hexadecane/air partition coefficient(L)for organic compounds is crucial for understanding the environmental behavior and fate of organic compounds and developing prediction models with polyparameter linear free energy ***,two quantitative structure activity relationship(QSAR)models were developed with 1272 L values for the organic compounds by using multiple linear regression(MLR)and support vector machine(SVM)*** the basis of the OECD principles,the goodness of fit,robustness and predictive ability for the developed models were *** SVM model was first developed,and the predictive capability for the SVM model is slightly better than that for the MLR *** applicability domain(AD)of these two models has been extended to include more kinds of emerging pollutants,i.e.,oraganosilicon *** developed QSAR models can be used for predicting L values of various organic *** van derWaals interactions between the organic compound and the hexadecane have a significant effect on the L value of the *** in silico models developed in current study can provide an alternative to experimental method for high-throughput obtaining L values of organic compounds.

关键词： L value Quantitative structure-activity relationship Multiple linear regression Support vector machine Oraganosilicon compounds

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Transport characteristics and dispersion evolution of CO-NOx mixture exhaust for shuttle movement emission in short-wall continuous mining face

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environmental science and Pollution Research 2024年第51期31卷 61191-61209页

作者： Zhou, Gang Liu, Yongwei Yang, Yang Luan, Guoliang Xu, Zhuo Sun, Biao College of Safety and Environmental Engineering Shandong University of Science and Technology Qingdao266590 China State Key Laboratory of Mining Disaster Prevention and Control Co-Founded By Shandong Province and the Ministry of Science and Technology Shandong University of Science and Technology Qingdao266590 China Department of Safety Engineering College of Safety and Environmental Engineering Shandong University of Science and Technology 579 Qianwangang Road Huangdao District Shandong Province Qingdao City266590 China

To investigate the evolution of CO and NOx pollution in the exhaust gas from diesel-powered shuttles under the double lane ventilation system of short-walled continuous mining face, this article uses a combination of numerical simulation and field tests to numerically simulate and analyze the pollution transport law of CO and NOx emitted from the shuttles at three locations: heading tunnel, contact alley and supporting tunnel. The results show that when the shuttle car in heading tunnel, the CO and NOx discharged from the shuttle discharge port move toward the exit of the tunnel at an average speed of 1.25 m/s. The high CO and NOx concentration area appears at the discharge port, with the highest CO volume fraction of 82.5 ppm and the highest NOx volume fraction of 28.25 ppm. When the shuttle car at the contact alley, by the two walls of the alleyway on the gas diffusion space extrusion effect, CO and NOx in X = 37.5 m ~ 42.5 m range gathered, appear high CO and NOx concentration band. When the shuttle car in supporting tunnel, it is hindered by the belt conveyor within the range of X = 63 m ~ 64.5 m, so CO and NOx fail to spread to the outlet of the roadway in time and pile up at the bottom of the roadway. The highest CO volume fraction is 76.25 ppm and the highest NOx volume fraction is 28.28 *** to the different positions of the car, the pollution areas of CO and NOx exceeding the specified threshold (24 ppm, 2.5 ppm) were divided, and the distribution characteristics of CO and NOx pollution were obtained by quantitative analysis through curve fitting, which provided a theoretical basis for the prevention and control of harmful substances emitted by fuel power equipment in underground environment. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Belt conveyors

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