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Deciphering the high-carbonization-temperature triggered enzymatic activity of wool-derived N,S-co-doped carbon nanosheets

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Chinese Chemical Letters 2024年第3期35卷 182-188页

作者： Jiachen Zhao Deshuai Yu Jianmin Chen Shihao Lin Yonghua tang Chaoyu Fan Dongfang Zhou Youhui Lin Department of Physics Research Institute for Biomimetics and Soft MatterFujian Provincial Key Laboratory for Soft Functional Materials ResearchXiamen UniversityXiamen 361005China School of Pharmacy and Medical technology Putian UniversityPutian 351100China Key Laboratory of Mental Health of the Ministry of Education NMPA Key Laboratory for Research and Evaluation of Drug Metabolism&Guangdong Provincial Key Laboratory of New Drug ScreeningSchool of Pharmaceutical SciencesSouthern Medical UniversityGuangzhou 510515China Key Laboratory of Pharmaceutical Analysis and Laboratory Medicine(Putian University) Fujian Province UniversityPutian 351100China

It is well-established that high carbonization temperature will trigger the enzyme-like activity of carbon-based ***,the catalytic mechanism is still ambiguous,which hinders the further rational design of nanomaterials as enzyme ***,N,S-rich carbonized wool nanosheets(CWs)were synthesized at different pyrolysis *** expected,only CWs treated with high-temperature possess intrinsic oxidase-and peroxidase-like ***,density functional theory(DFt)calculations demonstrate that graphitic nitrogen and the co-existence of nitrogen and sulfur in the carbon matrix serve as the active sites for the enzyme-like *** importantly,combining theoretical calculations and experimental observations,the high-temperature triggered catalytic mechanism can be ascribed to the fact that an appropriate high-temperature maximizes the graphitization degree to a certain extent,at which most of the catalytic active sites are well retained rather than ***,coupling with excellent photothermal conversion efficiency and catalytic performance,CWs can be applied to photothermal-catalytic cancer therapy under near-infrared region(NIR)light *** believe this work will contribute to understanding the catalytic mechanism of carbon-based nanozymes and promote the development of new biomedical and pharmaceutical applications.

关键词： Carbon-based nanozyme Catalytic mechanism Density functional theory High-temperature carbonization

Reliability evaluation of IGbt power module on electric vehicle using big data

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Journal of Semiconductors 2024年第5期45卷 50-60页

作者： Li Liu Lei tang Huaping Jiang Fanyi Wei Zonghua Li Changhong Du Qianlei Peng Guocheng Lu the School of Electrical Engineering Chongqing UniversityChongqing 400044China the Deepal Automobile technology Co. Ltd.Chongqing 400023China

there are challenges to the reliability evaluation for insulated gate bipolar transistors(IGbt)on electric vehicles,such as junction temperature measurement,computational and storage *** this paper,a junction temperature estimation approach based on neural network without additional cost is proposed and the lifetime calculation for IGbt using electric vehicle big data is *** direct current(DC)voltage,operation current,switching frequency,negative thermal coefficient thermistor(NtC)temperature and IGbt lifetime are *** the junction temperature(t_(j))is *** the rain flow counting method,the classified irregular temperatures are brought into the life model for the failure *** fatigue accumulation method is then used to calculate the IGbt *** solve the limited computational and storage resources of electric vehicle controllers,the operation of IGbt lifetime calculation is running on a big data *** lifetime is then transmitted wirelessly to electric vehicles as input for neural *** the junction temperature of IGbt under long-term operating conditions can be accurately estimated.A test platform of the motor controller combined with the vehicle big data server is built for the IGbt accelerated aging ***,the IGbt lifetime predictions are derived from the junction temperature estimation by the neural network method and the thermal network *** experiment shows that the lifetime prediction based on a neural network with big data demonstrates a higher accuracy than that of the thermal network,which improves the reliability evaluation of system.

关键词： IGbt junction temperature neural network electric vehicles big data

Effects of long-term partial substitution of inorganic fertilizer with pig manure and/or straw on nitrogen fractions and microbiological properties in greenhouse vegetable soils

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Journal of Integrative Agriculture 2024年第6期23卷 2083-2098页

作者： Shuo Yuan Ruonan Li Yinjie Zhang Hao'an Luan Jiwei tang Liying Wang Hongjie Ji Shaowen Huang State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China/Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesBeijing 100081China Institute of Agricultural Resources and Environment Hebei Academy of Agriculture and Forestry SciencesShijiazhuang 050051China College of Resources and Environment Henan Agricultural UniversityZhengzhou 450002China College of Forestry Hebei Agricultural UniversityBaoding 071000China

Partial substitution of inorganic fertilizers with organic amendments is an important agricultural management *** 11-year field experiment(22 cropping periods)was carried out to analyze the impacts of different partial substitution treatments on crop yields and the transformation of nitrogen fractions in greenhouse vegetable *** treatments with equal N,P_(2)O_(5),and K_(2)O inputs were selected,including complete inorganic fertilizer N(CN),50%inorganic fertilizer N plus 50%pig manure N(CPN),50%inorganic fertilizer N plus 25%pig manure N and 25%corn straw N(CPSN),and 50%inorganic fertilizer N plus 50%corn straw N(CSN).Organic substitution treatments tended to increase crop yields since the 6th cropping period compared to the CN *** the 8th to the 22nd cropping periods,the highest yields were observed in the CPSN treatment where yields were 7.5-11.1%greater than in CN *** 11-year fertilization,compared to CN,organic substitution treatments significantly increased the concentrations of NO_(3)^(-)-N,NH_(4)^(+)-N,acid hydrolysis ammonium-N(AHAN),amino acid-N(AAN),amino sugar-N(ASN),and acid hydrolysis unknown-N(AHUN)in soil by 45.0-69.4,32.8-58.1,49.3-66.6,62.0-69.5,34.5-100.3,and 109.2-172.9%,*** analysis indicated that soil C/N and OC concentration significantly affected the distribution of N *** highest concentrations of NO_(3)^(-)-N,AHAN,AAN,AHUN were found in the CPSN *** substitution treatments increased the activities ofβ-glucosidase,β-cellobiosidase,N-acetyl-glucosamidase,L-aminopeptidase,and phosphatase in the *** substitution treatments reduced vector length and increased vector angle,indicating alleviation of constraints of C and N on soil *** substitution treatments increased the total concentrations of phospholipid fatty acids(PLFAs)in the soil by 109.9-205.3%,and increased the relative abundance of G^(+)bacteria and fungi taxa,but decreased the relat

关键词： organic substitution management greenhouse vegetable production N fractions microbial community composition extracellular enzyme activity enzyme stoichiometry coefficients

Enriching Iodine and Regulating Grain Aroma,Appearance Quality,and Yield in Aromatic Rice by Foliar Application of Sodium Iodide

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Rice science 2024年第3期31卷 328-342,I0046-I0054页

作者： HONG Weiyuan DUAN Meiyang WANG Yifei CHEN Yongjian MO Zhaowen QI Jianying PAN Shenggang tang Xiangru State Key Laboratory for Conservation and Utilization of Subtropical Agricultural bioresources South China Agricultural UniversityGuangzhou 510642China Scientific Observing and Experimental Station of Crop Cultivation in South China Ministry of Agriculture and Rural AffairGuangzhou 510642China Guangzhou Key Laboratory for Science and technology of Aromatic Rice Guangzhou 510642China

Applying iodine fertilizers to cultivate iodine-rich crops for daily intake is an effective approach for iodine supplementation,especially for aromatic *** experiments were conducted during the early growing seasons of 2021 and 2022 to evaluate the impacts of foliar application of iodine fertilizer on aromatic rice and to explore the optimal iodine fertilizer *** the full heading stage,six different concentrations of sodium iodide solutions of 0%(CK),0.010%(t1),0.025%(t2),0.050%(t3),0.075%(t4),and 0.100%(t5)were applied to indica aromatic rice cultivars Meixiangzhan 2 and *** results showed that sodium iodide treatments significantly increased the iodine and sodium contents in both leaves and *** with the CK,the t1 and t2 treatments increased the 2-acetyl-1-pyrroline(2-AP)content in mature grains by 8.41%-101.66%and 13.58%-74.60%,*** in the contents of 1-pyrroline-5-carboxylic acid,proline,1-pyrroline,and methylglyoxal,as well as the activity of proline dehydrogenase were also ***,sodium iodide treatments remarkably decreased the chalky grain rate,chalkiness area,and chalkiness degree of aromatic rice,with the t2 treatment exhibiting a 17.79%-47.42%decrease in chalkiness degree compared with the ***,t1 and t2 treatments showed beneficial impacts on chlorophyll content,photosynthetic characteristics,and yield components,while t3,t4,and t5 treatments exhibited adverse effects on leaf and grain *** linear discriminant analysis revealed significant differences between *** correlation analysis and piecewise structural equation modeling showed that the iodine and sodium influenced the photosynthetic characteristics and chlorophyll content of the leaves,thereby regulating the 2-AP biosynthesis and yield components,ultimately affecting the 2-AP content and ***,this study suggests that foliar application of 0.025%sodium iodide is an effective method t

关键词： 2-acetyl-1-pyrroline appearance quality aromatic rice foliar application grain yield iodine

Enhanced electrochemical performance of Li_(1.3)Al_(0.3)ti_(1.7)(PO_(4))_(3) solid electrolyte by anion doping

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Nano Research 2024年第3期17卷 1465-1472页

作者： Jingrui Kang Xu Guo Rui Gu Honglei Hao Yi tang Jiahui Wang Li Jin Hongfei Li Xiaoyong Wei Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic and Information EngineeringXi’an Jiaotong UniversityXi’an 710049China School of Energy and Materials Shanghai Key Laboratory of Engineering Materials Application and EvaluationShanghai Polytechnic UniversityShanghai 201209China

Nowadays,the majority of the studies on the substitution are focused on cations(such as Y^(3+),ti^(4+),P^(5+),etc.)in Li_(1.3)Al_(0.3)ti_(1.7)(PO_(4))_(3)(LAtP),while there are few studies on the substitution of anion O^(2-).In this work,the modified LAtP with a series of LiCl(LAtPClx,x=0.1,0.2,0.3,0.4)additives is prepared to enhance ionic *** successful introduction of Cl-makes the length of the c axis decrease from 20.822(2)to 20.792(1)Å,and the bulk conductivity of 2.13×10^(-3) S·cm^(-1) is achieved in LAtPCl_(0.3).Moreover,the Al/ti-O1/Cl1 and Al/ti-O_(2)/Cl_(2) distance decrease,while the Li1-O_(2)/Cl_(2) distance *** ions migrate more easily in the nanochannel of *** addition,the LiCl additive increases the relative density and the grain boundary conductivity of LAtPClx ***,a higher ionic conductivity of 2.12×10^(–4) S·cm^(-1) and a low activation energy of 0.30 eV are obtained in LAtPCl_(0.3).Correspondingly,the symmetric cell exhibits a low overpotential of±50 mV for over 200 h in LAtPCl_(0.3).the solid-state Li|LAtPCl_(0.3)|NCM811(NCM811=LiNi0.8Co0.1Mn0.1O_(2))battery exhibits high initial capacity 185.1 mAh·g^(-1) with a capacity retention rate of 95.4%after 100 cycles at 0.5 *** result suggests that LiCl additive is an effective strategy to promote electrochemical properties of LAtP solid electrolyte and can be considered for reference to other inorganic solid electrolytes systems.

关键词： Li_(1.3)Al_(0.3)ti_(1.7)(PO_(4))_(3)(LAtP)solid electrolyte anion doping ionic conductivity cyclic performance

MXene-based Elastomer Mimetic StretchableSensors: Design, Properties, and Applications

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Nano-Micro Letters 2024年第7期16卷 295-342页

作者： Poushali Das Parham Khoshbakht Marvi Sayan Ganguly Xiaowu(Shirley)tang bo Wang Seshasai Srinivasan Amin Reza Rajabzadeh Andreas Rosenkranz School of biomedical Engineering McMaster University1280 Main Street WestHamiltonON L8S 4L8Canada Department of Chemistry and Waterloo Institute for Nanotechnology(WIN) University of Waterloo200 University Ave WestWaterlooONCanada Centre for Eye and Vision Research(CEVR) 17W Hong Kong Science ParkShatinHong KongPeople’s Republic of China Chair of Functional Materials Department of Materials Science and EngineeringSaarland UniversitySaarbruckenGermany W booth School of Engineering Practice and technology McMaster University1280 Main Street WestHamiltonON L8S 4L7Canada Department for Chemical Engineering Biotechnology and MaterialsUniversity of ChileSantiagoChile

Flexible sensors based on MXene-polymer composites are highly prospective for next-generation wearable electronics used in human-machine *** of the motivating factors behind the progress of flexible sensors is the steady arrival of new conductive ***,a new family of 2D nanomaterials,have been draw-ing attention since the last decade due to their high electronic conduc-tivity,processability,mechanical robustness and chemical *** this review,we encompass the fabrication of MXene-based polymeric nanocomposites,their structure-property relationship,and applications in the flexible sensor ***,our discussion is not only lim-ited to sensor design,their mechanism,and various modes of sensing platform,but also their future perspective and market throughout the *** our article,we intend to fortify the bond between flexible matrices and MXenes thus promoting the swift advancement of flexible MXene-sensors for wearable technologies.

关键词： Flexible sensor 2D nanomaterials MXene Wearable and conductive Applications

Facile preparation of a SiC@SiO_(2)nanowire-toughened Zrb_(2)-SiC/SiC bilayer coating with good interfacial bonding,high toughness,and excellent cyclic ablation resistance on C/CA composites

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Journal of Advanced Ceramics 2024年第4期13卷 486-495页

作者： Meng Yan Chenglong Hu Jian Li Shengyang Pang bohui Sun Rida Zhao bin Liang Rui Luo Sufang tang Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

Preparing antioxidant coatings to address the inherent oxidation sensitivity of carbon fiber-reinforced carbon aerogel(C/CA)composites is a feasible way to promote their application in oxidizing environments as thermal insulation ***,preparing the coatings with excellent oxidation and ablation resistance while avoiding evident damage to the C/CA substrate still remains a ***,a SiC@SiO_(2)nanowire-toughened Zrb2–SiC/SiC bilayer coating with a large thickness of 500μm was prepared on C/CA using a one-step low-temperature reaction sintering method,which simultaneously formed a sintered outer layer with even-distributed nanowires and a siliconized gradient inner *** courtesy of the synergic thermal response of the layers and the crack deflection induced by the nanowires,the resulting coating has moderate residual compressive stress of 0.08–1.22 GPa in the interface,high interfacial bonding strength of 6.02 MPa,and good fracture toughness of 4.36 MPa·m^(1/2).benefited from the optimum components and improved structure,the coating shows excellent cyclic ablation resistance with linear ablation rates of 0.1μm/s at 1650℃for 1500 s(300 s×5 cycles)and 0.4μm/s at 1850℃for 900 s(300 s×3 cycles).the one-step preparation strategy contributes to little damage to the substrate,thus showing the well-preserved mechanical and thermal insulation properties.

关键词： coating carbon fiber reinforced carbon aerogel(C/CA)composites toughness interface residual stress

Design and Implementation of a High-Sensitivity Magnetic Sensing System based on GMI Effect

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Journal of beijing Institute of technology 2024年第3期33卷 237-247页

作者： Wenzhu Wu Ming Xu Changlin Han Junquan tang Jia Xu Lin Xu Mingxin Qin Department of Electronic Engineering Army Medical UniversityChongqing 400038China Chongqing Medical and Pharmaceutical College Chongqing 401331China Department of Intelligence Science and technology National University of Defense TechnologyChangshaChangsha 410073China Intelligent Game and Decision Lab Beijing 100091China

A high-sensitivity magnetic sensing system based on giant magneto-impedance(GMI)effect is designed and *** system comprises a GMI sensor equipped with a gradient probe and an signal acquisition and processing module.A segmented superposition algorithm is used to increase target signal and reduce the random *** results show that under unshielded,room temperature conditions,the system achieves successful detection of weak magnetic fields down to 2 pt with a notable sensitivity of 1.84×10^(8)V/t(G=1000).by applying 17 overlays,the segmented superposition algorithm increases the power proportion of the target signal at 31 Hz from6.89%to 45.91%,surpassing the power proportion of the 2 Hz low-frequency interference ***,it reduces the power proportion of the 20 Hz random *** segmented superposition process effectively cancels out certain random noise elements,leading to a reduction in their respective power *** high-sensitivity magnetic sensing system features a simple structure,and is easy to operate,making it highly valuable for both practical applications and broader dissemination.

关键词： high-sensitivity magnetic field sensing system GMI effect segmented superposition algorithm

Multifunctional MXene/rGO aerogels loaded with Co/MnO nanocomposites for enhanced electromagnetic wave absorption,thermal insulation and pressure sensing

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Nano Research 2024年第9期17卷 7803-7813页

作者： Chan Guo Shiping Shao Xin Zhang Yunxiang tang Luxue Wang Jiurong Liu Lili Wu Ke bi Fenglong Wang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong UniversityJinan 250061China State Key Laboratory of Information Photonics and Optical Communications School of ScienceBeijing University of Posts and TelecommunicationsBeijing 100876China

Aerogel-based composites hold promising application prospects as potential electromagnetic wave(EMW)absorption materials,yet the construction of such materials with ingenious microstructures,appropriate magnetic/dielectric multi-components,and integrated multifunctionality remains considerably ***,a multicomponent Co/MnO/ti_(3)C_(2)t_(x) MXene/rGO(CMMG)hybrid aerogel featured with three-dimensional(3D)vertical directional channel architecture is *** from the synergistic effect arising from the 3D conductive networking structure,diverse heterogeneous interfaces,magnetic/dielectric multicomponent,and multiple loss pathways,the optimized CMMG-2 aerogel delivers fascinating EMW absorption capabilities,characterized by a minimal reflection loss(RL_(min))of-77.41 db and an effective absorption bandwidth(EAb)of 6.56 ***,the remarkable hydrophobicity,exceptional thermal insulation capabilities,and outstanding photothermal properties of CMMG-2 aerogel make it highly promising for multiple application in diverse and demanding ***,the distinctive pore structure of hybrid aerogel also allows it for sensitive and reliable detection of electrical signals caused by pressure changes and human ***,this research provides a viable design strategy for the development of lightweight,efficient,and multifunctional aerogel-based EMW absorption materials for various application scenarios.

关键词： electromagnetic wave absorption ti_(3)C_(2)qt_(x)MXene reduced graphene oxide magnetic-dielectric nanoparticles multifunctional aerogel