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Vacancy-modified bimetallic FeMoS_(x)/CoNiP_(x) heterostructure array for efficient seawater splitting and Zn-air battery

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Journal of Energy Chemistry 2023年第6期81卷 533-542,I0012页

作者： Ansheng Wang Shan gao Jiaguo Yan Chunning Zhao meng Yu Weichao Wang Integrated Circuits and Smart System Lab(Shenzhen) Renewable Energy Conversion and Storage CenterTianjin Key Laboratory of Photo-Electronic Thin Film Device and TechnologyCollege of Electronic Information and Optical EngineeringNankai UniversityTianjin 300071China Department of Physical Science and Technology Ningbo UniversityNingbo 315211ZhejiangChina Division of Oilfield Chemicals China Oilfield Services LimitedTianjin 300452China

The development of highly efficient OER catalysts with superior durability for seawater electrolysis and Zn-air battery is important but ***,the vacancy-modified heterostructured bimetallic Fe Mo S_(x)/Co Ni P_(x)OER electrocatalyst is *** from the electron redistribution and reaction kinetics modulation resulting from vacancy introduction and heterojunction formation,it yields ultralow OER overpotentials of 196,276,303 m V in 1 M KOH and 197,318,348 m V in 1 M KOH+seawater at 10,500,1000 m A cm^(-2),respectively,surviving 600 h at 800 m A cm^(-2)without obvious ***,FeMoS_(x)/CoNiP_(x)-based Zn-air battery not only affords the high peak power density of 214.5 m W cm^(-2)but also exhibits the small voltage gap of 0.698 V and long lifetime of 500 h at 10 m A cm^(-2),overmatching overwhelming majority of reported advanced *** is revealed experimentally that the OER process on rationally designed Fe Mo S_(x)/Co Ni P_(x)follows the adsorbate evolution mechanism and the ratedetermining step shifts from^(*)OOH formation in individual building blocks to^(*)OOH deprotonation process in FeMoS_(x)/CoNiP_(x),providing the directly proof of how the vacancy introduction and heterojunction formation affect the reaction kinetics.

关键词： Vacancy Heterojunction Oxygen evolution reaction Seawater splitting Zn-air battery

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Investigation of mechanical failure performance of a large-diameter shield tunnel segmental ring

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2024年第5期25卷 411-428页

作者： Binyong gao Renpeng CHEN Huaina WU Chengcheng ZHANG meng FAN Chao XIAO Research Center of Underground Space Advanced Technology Hunan UniversityChangsha 410082China Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education Hunan UniversityChangsha 410082China Department of Civil Engineering Hunan UniversityChangsha 410082China China Construction No.5 Civil Engineering Co. Ltd.Changsha 410004China

The control criteria for structural deformation and the evaluation of operational safety performance for large-diameter shield tunnel segments are not yet clearly *** address this issue,a refined 3D finite element model was established to analyze the transverse deformation response of a large-diameter segmental *** analyzing the stress,deformation,and crack distribution of large-diameter segments under overload conditions,the transverse deformation of the segmental ring could be divided into four *** main reasons for the decrease in segmental ring stiffness were found to be the extensive development of cracks and the complete formation of four plastic *** deformation control value for the large-diameter shield tunnel segment is chosen as 8%o of the segment's outer diameter,representing the transverse deformation during the formation of the first semi-plastic hinge(i.e.,the first yield point)in the *** control value can serve as a reinforcement standard for preventing the failure of large-diameter shield tunnel *** flexural bearing capacity characteristic curve of segments was used to evaluate the structural strength of a large-diameter segmental *** was discovered that the maximum internal force combination of the segment did not exceed the segment ultimate bearing capacity curve(SUBC).However,the combination of internal force at 9°,85°,and 161°of the joints,and their symmetrical locations about the 0°-180°axis exceeded the joint ultimate bearing capacity curve(JUBC).The results indicate that the failure of the large-diameter segment lining was mainly due to insufficient joint strength,leading to an instability *** findings from this study can be used to develop more effective maintenance strategies for large-diameter shield tunnel segments to ensure their long-term performance.

关键词： Finite element model Transverse deformation response Upper overload Plastic hinges Flexural bearing capacity

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Nationwide distribution of polycyclic aromatic hydrocarbons in soil of China and the association with bacterial community

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Journal of Environmental Sciences 2023年第6期128卷 1-11页

作者： Qiuyue Zhang meng gao Xinhui Sun Yu Wang Chaolei Yuan Hongwen Sun MOE Key Laboratory of Pollution Processes and Environmental Criteria College of Environmental Science and EngineeringNankai UniversityTianjin 300350China School of Agriculture Sun Yat-sen UniversityShenzhen 518107China

Soil contamination by polycyclic aromatic hydrocarbons(PAHs)has raised great environmental ***,the information on national wide distribution of PAHs in soil as well as their effect on soil bacterial community are *** this study,16 PAHs weremeasured in 94 soil samples collected across *** total concentration of 16 PAHs(PAHs)in soil ranged from 74.0 to 17,657 ng/g(dry weight basis),with a median value of 200 ng/*** was themajor soil PAH,with amedian concentration of 71.3 ng/*** samples from Northeast China had a higher median concentration ofPAHs(1,961 ng/g)than those from other *** emission and wood/grass/coal combustion were potential sources for soil PAHs based on diagnostic ratios and positive matrix factors analysis.A nonnegligible ecological risk(hazard quotients>1)was found in over 20%of soil samples analyzed and the highestmedian total HQs value(8.53)was found in soils from Northeast *** effect of PAHs on bacterial abundance,α-diversity,andβ-diversity was limited in the soils ***,the relative abundance of some members in genera Gaiella,Nocardioides,and Clostridium was significantly correlated with the concentrations of some ***,the bacterium Gaiella Occulta showed potential in indicating soil contamination by PAH,which is worth further exploration.

关键词： PAHs Soil Source analysis Bacterial community

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Sono-assembly of folate-decorated curcumins/alginate core-shell microcomplex and its targeted delivery and pH/reduction dual-triggered release

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Particuology 2024年第1期84卷 168-177页

作者： Qingye meng Shuangling Zhong Jingfei Wang Zhenqian Zhang Yan gao Xuejun Cui College of Chemistry Jilin University Changchun130012China College of Resources and Environment Jilin Agricultural University Changchun130118China State Key Laboratory of Supramolecular Structure and Materials Jilin UniversityChangchun130012China Weihai Institute for Bionics-Jlin University Weihai264400China

In this study,sodium alginate(SA),a non-toxic natural polysaccharide with good biocompatibility and biodegradability,was developed for targeted delivery of curcumin(CUR)in tumor *** strategy is to sulfhydrylate the folic acid(FA)modified SA,and the CUR dissolved in ethyl acetate(EAC)phase is coated in microcapsules by a quick,efficient and environment-friendly sonochemical *** EAC in the microcapsule core is volatile,which can be recycled and reused to reduce *** prepared mi-crocapsules(FA-RSMCs@CUR)exhibited similar toxicity to free curcumin in anti-tumour evaluation in ***-RSMCs@CUR also exhibited effective antibacterial properties in the antibacterial evaluation in *** is expected to become a low-cost tumor targeting vector in the future,and has the potential to be promoted in clinical application.

关键词： Reductive-responsive Sodium alginate Microcapsule Targeted delivery Sonochemical

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Au23（CR）14 nanocluster restores fibril Aβ's unfolded state with abolished cytotoxicity and dissolves endogenous Aβplaques

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National Science Review 2020年第4期7卷 763-774页

作者： Wenkang Zhang Guanbin gao Zhongjie Ma Zhuoying Luo meng He Taolei Sun State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology

The misfolding of amyloid-β（Aβ） peptides from the natural unfolded state to β-sheet structure is a critical step, leading to abnormal fibrillation and formation of endogenous Aβ plaques in Alzheimer's disease（AD）. Previous studies have reported inhibition of Aβ fibrillation or disassembly of exogenous Aβ fibrils in vitro. However, soluble Aβ oligomers have been reported with increased cytotoxicity; this might partly explain why current clinical trials targeting disassembly of Aβ fibrils by anti-Aβ antibodies have failed so *** we show that Au23（CR）14(a new Au nanocluster modified by Cys-Arg（CR） dipeptide) is able to completely dissolve exogenous mature Aβ fibrils into monomers and restore the natural unfolded state of Aβ peptides from misfolded β-sheets. Furthermore, the cytotoxicity of Aβ40fibrils when dissolved by Au23（CR）14is fully abolished. More importantly, Au23（CR）14is able to completely dissolve endogenous Aβ plaques in brain slices from transgenic AD model mice. In addition, Au23（CR）14has good biocompatibility and infiltration ability across the blood–brain barrier. Taken together, this work presents a promising therapeutics candidate for AD treatment, and manifests the potential of nanotechnological approaches in the development of nanomedicines.

关键词： gold nanoclusters Alzheimer’s disease restores fibril Aβ’s unfolded state abolished cytotoxicity dissolves endogenous Aβ plaques

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Synthesis of Ti_2CT_x MXene as electrode materials for symmetric supercapacitor with capable volumetric capacitance

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Journal of Energy Chemistry 2019年第4期28卷 11-18页

作者： Kai Zhu Yuming Jin Fei Du Shuang gao Zhongmin gao Xing meng Gang Chen Yingjin Wei Yu gao Key Laboratory of Superlight Materials and Surface Technology Ministry of Education College of Materials Science and Chemical Engineering Harbin Engineering University Key Laboratory of Physics and Technology for Advanced Batteries Ministry of Education College of Physics Jilin University State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin University State Key Laboratory of Superhard Materials Jilin University

Two-dimensional(2D)metal carbides,MXene,present the promising application for the energy storage *** the MXene family,Ti_2CT_xas the lightest material,shows its unique electrochemical ***,Ti_2CT_xis synthesized by selective etching Al layer from the Ti_2Al *** the optimized HF treating condition,Ti_2CT_xdisplays high volumetric capacitance and remarkable rate ***,the Ti_2CT_x//Ti_2CT_xsymmetric supercapacitor is designed and assembled,which presents capable capacitance,outstanding rate performance and excellent cycling *** remarkable electrochemical performance is attributed to its 2D structure and high electronic *** work demonstrates the potential application of the Ti_2CT_xfor the supercapacitors and provides a template to design highperformance supercapacitors with 2D electrode materials.

关键词： Supercapacitor Two-dimensional material Ti2CTx MXene

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Study on picosecond pulse-train multi-wavelength Raman laser operating at two Raman modes without tuning

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Optoelectronics Letters 2020年第1期16卷 17-20页

作者： gao Xiao-qiang CHEN meng Beijing Aerospace Institute for Metrology and Measurement Technology Beijing 100076China Institute ofLaser Engineering Beijing University of TechnologyBeijing 100124China

The Stokes line of multi-mode Raman laser was limited by low conversion efficiency of higher-order Stokes and the competition between pure cascaded stimulated Raman scattering(SRS) and Four-wave-mixing(FWM) process which will deplete the pump of SRS process. Through developed pulse-train synchronously pumping technique and two-Raman-mode operating, the orders of output Stokes was improved. With average power of 220 mW, the developed a Raman laser providing up to 5 orders Stokes output, containing up to 16 laser lines without tuning operating and four-wave-mixing process.

关键词： tuning laser pulse

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Climate and fire drivers of forest composition and openness in the Changbai Mountains since the Late Glacial

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Forest Ecosystems 2023年第4期10卷 448-458页

作者： meng meng Sandy P.Harrison Dongmei Jie Nannan Li Baojian Liu Dehui Li Guizai gao Honghao Niu School of Geographical Sciences Northeast Normal UniversityChangchun130024China Geography&Environmental Science University of ReadingWhiteknightsReadingRG66AHUK Leverhulme Centre for Wildfires Environment and SocietyImperial College LondonSouth KensingtonLondonSW72BWUK Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains Ministry of EducationChangchun130024China Institute for Peat and Mire Research State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation RestorationNortheast Normal UniversityChangchun130024China Key Laboratory for Vegetation Ecology Ministry of EducationChangchun130024China HaiZhou Senior High School Lianyungang222023China College of Resources and Environment Hebei Normal UniversityShijiazhuang050010China School of Archaeology Jilin UniversityChangchun130015China

Ongoing climate changes have a direct impact on forest growth;they also affect natural fire regimes,with further implications for forest *** of how these will affect forests on decadal-to-centennial timescales is *** we use reconstructions of past vegetation,fire regimes and climate during the Holocene to examine the relative importance of changes in climate and fire regimes for the abundance of key tree species in northeastern *** reconstructed vegetation changes and fire regimes based on pollen and charcoal records from Gushantun *** then used generalized linear modelling to investigate the impact of reconstructed changes in summer temperature,annual precipitation,background levels of fire,fire frequency and fire magnitude to identify the drivers of decadal-to-centennial changes in forest openness and *** in climate and fire regimes have independent impacts on the abundance of the key tree *** variables are generally more important than fire variables in determining the abundance of individual *** is the only determinant of forest openness,but summer temperature is more important than precipitation for individual tree taxa with warmer summers causing a decrease in cold-tolerant conifers and an increase in warmth-demanding broadleaved *** background level and fire frequency have negative relationships with the abundance of most tree taxa;only Pinus increases as fire frequency *** magnitude of individual fires does not have a significant impact on species abundance on this *** climate and fire regime characteristics must be considered to understand changes in forest composition on the decadal-to-centennial *** are differences,both in sign and magnitude,in the response of individual tree species to individual drivers.

关键词： Forest composition Climate change Fire regime Fire frequency Changbai Mountains Holocene Generalized linear model

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Band manipulation for high thermoelectric performance in SnTe through heavy CdSe-alloying

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Journal of Materiomics 2019年第1期5卷 111-117页

作者： Bo gao Jing Tang Fanchen meng Wen Li Interdisciplinary Materials Research Center School of Materials Science and EngineeringTongji University4800 Caoan RoadShanghai201804China Department of Physics and Astronomy Clemson UniversityClemson29634USA

Convergence of L and S valence bands through alloying with monotellurides,has successfully realized the significant zT-enhancement in SnTe ***,as a solvend introducing Cd-substitution at Sn site,has been demonstrated theoretically and experimentally as an effective agent to reduce the energy difference between two valence ***,the low solubility of~3%for CdTe in SnTe limits the possibility for further zT-enhancement in SnTe,which motivates the existing efforts on increasing solubility of CdTe or exploring Cd-based solvend with higher *** by the solubility as high as 14%for CdSe in SnTe at 1050 K,this work focuses on the effect of CdSe on thermoelectric properties of *** converged valence bands induced by the heavy Cd-substitution,results in a significant increase in electronic ***,CdSe-alloying would simultaneously introduce cation and anion point defects and boundary interfaces of CdSe precipitates,which leads to a strong phonon scattering and therefore a reduced lattice thermal conductivity of~0.8 W/*** a result,the synergistic effect of electronic and thermal performances results in a peak zT as high as 1.1 at 850 K,demonstrating(SnTe)1-x(CdSe)x as the promising thermoelectric materials.

关键词： alloying SnTe solubility

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计算机模拟复位联合骨盆复位架治疗APC-Ⅲ型骨盆骨折

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中国组织工程研究 2025年第9期29卷 1870-1875页

作者：高振洋曾秀安杨其兵寇贤帅王克竞厉孟甘肃中医药大学第一临床医学院甘肃省兰州市730030 贵州医科大学附属白云医院贵州省贵阳市550014 甘肃省肿瘤医院甘肃省兰州市730050 甘肃省人民医院甘肃省兰州市730030

背景:骨盆骨折类型多样,使用骨盆复位架进行复位时缺乏系统的复位路径,需要根据术者经验结合透视结果进行调整,具有不确定性与不可重复性。目的:探讨计算机模拟复位技术联合骨盆复位架治疗前后压缩(anteroposterior compression,APC)-... 详细信息

背景:骨盆骨折类型多样,使用骨盆复位架进行复位时缺乏系统的复位路径,需要根据术者经验结合透视结果进行调整,具有不确定性与不可重复性。目的:探讨计算机模拟复位技术联合骨盆复位架治疗前后压缩(anteroposterior compression,APC)-Ⅲ型骨盆骨折的临床疗效。方法:回顾性分析2018年1月至2021年12月术前采用计算机模拟复位,术中采用骨盆复位架辅助复位的APC-Ⅲ型骨盆骨折患者19例,其中7例使用前环双钢板、12例采用单钢板联合前环皮下内置外固定架固定,所有患者均使用2枚骶髂螺钉固定后环。记录手术时间、术中复位时间、术中透视次数、出血量和随访时间,观察骨折愈合时间及术后并发症情况。根据Matta评分标准评定骨折复位情况,末次随访采用Majeed骨盆功能评分评估患者功能。结果与结论:①19例患者均完成手术,7例前环使用双钢板、12例采用单钢板联合前环皮下内置外固定架固定,后环均使用2枚骶髂螺钉,分别固定S1、S2椎体;②手术时间74-147 min,平均(101.63±19.55)min;术中复位时间26-41 min,平均(38.11±3.31)min;术中透视次数35-81次,平均(62.68±13.11)次;术中出血60-130 mL,平均(85.37±20.57)mL;③所有患者均获得随访,随访时间12-26个月,骨折愈合时间12-20周,平均(16.37±2.50)周;④术后1 d按Matta标准评定复位情况:优14例,良5例;末次随访Majeed功能评分:优16例,良3例;⑤2例患者术区切口出现红肿、渗液等脂肪液化现象,经积极换药后逐渐愈合;所有患者术后均未出现内固定物松动、骨折复位丢失、神经损伤等并发症。提示采用计算机模拟复位技术联合骨盆复位架治疗APC-Ⅲ型骨盆骨折,在提高复位效率、改善骨盆功能方面均具有优势。

关键词：骨盆骨折前后压缩型损伤闭合复位骨盆解锁复位装置钢板内固定

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