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硅酸盐学报 2025年第5期53卷 1389-1402页

作者：谢宗霖钟福文向功坤王茂贾桂良元强中南大学土木工程学院长沙410075 高速铁路建造技术国家工程研究中心长沙410075 中国铁路济南局集团有限公司济南250000 中国铁路上海局集团有限公司上海200071

中国交通基础设施混凝土结构已进入大规模养护维修阶段,有机胶黏剂是养护维修主要工程材料,提升其与水泥基材料界面黏附的长期有效性是延长混凝土结构服役寿命的重要途径。调研了中国混凝土结构养护维修用环氧树脂、聚氨酯、硅酮胶有机... 详细信息

中国交通基础设施混凝土结构已进入大规模养护维修阶段,有机胶黏剂是养护维修主要工程材料,提升其与水泥基材料界面黏附的长期有效性是延长混凝土结构服役寿命的重要途径。调研了中国混凝土结构养护维修用环氧树脂、聚氨酯、硅酮胶有机胶黏剂,结合工程需求和性能优势概述了具体应用场景。梳理了机械咬合作用、分子间相互作用、热力学相互作用黏附机理与黏附驱动力,分析了水分、盐溶液、胶黏剂老化、振动荷载耦合作用下界面黏附劣化机制。归纳了有机胶黏剂–水泥基材料界面黏附增强技术,提出了有机胶黏剂分子结构优化设计和界面黏附耐久性研究展望和创新思路。

关键词：有机胶黏剂水泥基材料界面黏附机理

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Promoting propane dehydrogenation over Zn/hollow porous silicalite-1 catalysts via modulating the electronic structures of Pt

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FUEL 2024年 364卷

作者： Yang, fuwen Zhang, Jie Chen, Jinwei wang, Gang Yu, Tong Zhao, Junyu Li, Qian Shi, Zongbo Zhuo, Runsheng wang, Ruilin Sichuan Univ Coll Mat Sci & Engn Chengdu 610065 Peoples R China Sichuan Univ Engn Res Ctr Alternat Energy Mat & Devices Minist Educ Chengdu 610065 Peoples R China REZEL Catalysts Corp Shanghai 200120 Peoples R China

Propane dehydrogenation (PDH) provides a promising way to meet the requirement of propylene supply, but the commonly-used Pt-based catalysts still suffer from unsatisfactory stability and deactivation. Herein, an interfacial regulation strategy is developed to construct the Cu, Pt, and Zn species modified hollow porous silicalite-1 (CuPt/ Zn-HPS-1). Owing to the regulation role of Pt, the electron-deficient [ZnOH]+ Lewis acid sites accelerated the CH activation, which was beneficial to achieve the excellent PDH performance. More importantly, the additionally introduced Cu2+ further modulated the geometric structure and electronic density of Pt, thus effectively improving the anti-sintering ability and alleviating the coke deposition. Benefiting from the interfacial regulation and Lewis active [ZnOH]+ sites, the optimal CuPt/Zn-HPS-1 catalyst exhibited an excellent catalytic PDH performance with the initial propane conversion of 30.4 % and propylene selectivity of 99.0 %. The CuPt/Zn-HPS-1 also demonstrated robust recycling stability in reaction-regeneration cycling test with the smaller deactivation rate constant. This work affords a strategy for improving PDH performance in practical industrial application.

关键词： Interfacial regulation Lewis acid site Propane dehydrogenation Platinum

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Structure and Properties of SnBi/Cu Composite Lead-free Solder 23

Structure and Properties of SnBi/Cu Composite Lead-free Sold...

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23rd International Conference on Electronic Packaging Technology (ICEPT)

作者： Zhou, Jiacheng Zhang, fuwen wang, Zhigang Li, Zhigang Zhao, Zhaohui Xu, Lei Li, Ailiang He, Huijun Hu, Qiang GRINM Grp Ind Res Inst Met Powder Mat Beijing Peoples R China Beijing COMPO Adv Technol Co Ltd Beijing Peoples R China Gen Res Inst Nonferrous Met Beijing Peoples R China GRIPM Adv Mat Co Ltd Beijing Peoples R China Zhongshan Hanhua Tin Ind Co Ltd Zhongshan Peoples R China

ISBN: (数字)9781665499057

ISBN: (纸本)9781665499057

In order to solve the brittleness problem of the Sn-Bi eutectic alloy solder and improve its electrical and thermal conductivity, Cu powders were added into the SnBi58 solder paste. During the simulate surface mount technology (SMT) soldering process, the Cu element in the surface layer of the Cu particles reacts with the Sn element in the surrounding SnBi58 solder matrix, and the "thorn ball shape" inter-metallic compound (IMC) layer is formed on the surface of Cu particles. The Cu particles can form a continuous connection when the added amount is appropriate. The continuous connection can develop throughout the whole solder layer. This improves the mechanical properties and electrical and thermal conductivity of the entire solder layer, and it can effectively solve the brittleness problem and insufficient electrical and thermal conductivity of SnBi58 solder alloy. Also, it is found that some Cu particles in the composite solder significantly diffuse with the Cu substrate at the interface, forming Cu-Cu bonding. This greatly improves the interface bonding ability of SnBi58 alloy.

关键词： SnBi58 alloy Cu powders electrical composite lead-free solder

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Solvent Effects on Linear and Multi-branched Bithiazole-based Derivatives Fluorescence Studied by Steady-state and Time-resovled Spectroscopy

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RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2021年第8期95卷 1641-1645页

作者： Shi, fuwen Ni, Minghao wang, Zhiquan He, Nannan Li, Xiang Hua, Jianli Li, Bo Chen, Ye East China Normal Univ Dept Optoelect Key Lab Polar Mat & Devices MOE Shanghai 200241 Peoples R China East China Univ Sci & Technol Key Lab Adv Mat Shanghai 200237 Peoples R China East China Univ Sci & Technol Inst Fine Chem Shanghai 200237 Peoples R China

Steady-state absorption, emission, and time-resolved spectroscopy were utilized to study the dynamics of excited states of linear and multi-branched bithiazole derivatives in different solvents at room temperature. In the studied compounds, triphenylamine and bithiazole groups act as donor and acceptor, respectively. BTZ-I and II have similar linear molecular structures, while BTZ-III and BTZ-IV have multi-branched structures. The difference is that the donor and acceptor units are connected by a single bond or a triple bond, respectively. With increase in solvent polarity, the fluorescence spectra exhibit a red shift and the fluorescence lifetime increases. Our results suggest there is intra-molecular charge transfer (ICT) processes in these four samples.

关键词： ICT solvent effect time-resolved spectroscopy

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Diet drives convergent evolution of gut microbiomes in bamboo-eating species

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Science China(Life Sciences) 2021年第1期64卷 88-95页

作者： Guangping Huang Xiao wang Yibo Hu Qi Wu Yonggang Nie Jiuhong Dong Yun Ding Li Yan fuwen Wei CAS Key Laboratory of Animal Ecology and Conservation Biology Institute of ZoologyChinese Academy of SciencesBeijing100101China University of Chinese Academy of Sciences Beijing100049China Beijing Milu Ecological Research Center Beijing100076China Center for Excellence in Animal Evolution and Genetics Chinese Academy of SciencesKunming650223China State Key Laboratory of Mycology Institute of MicrobiologyChinese Academy of SciencesBeijing100101China

Gut microbiota plays a critical role in host physiology and *** coevolution between the host and its gut microbes facilitates animal adaptation to its specific ecological *** factors such as host diet and phylogeny modulate the structure and function of gut ***,the relative contribution of each factor in shaping the structure of gut microbiota remains *** giant(Ailuropoda melanoleuca)and red(Ailurus styani)pandas belong to different families of order *** have evolved as obligate bamboo-feeders and can be used as a model system for studying the gut microbiome convergent ***,we compare the structure and function of gut microbiota of the two pandas with their carnivorous relatives using 16S rRNA and metagenome *** found that both panda species share more similarities in their gut microbiota structure with each other than each species shares with its carnivorous *** indicates that the specialized herbivorous diet rather than host phylogeny is the dominant driver of gut microbiome convergence within *** analysis revealed that the symbiotic gut microbiota of both pandas possesses a high level of starch and sucrose metabolism and vitamin B12 *** findings suggest a diet-driven convergence of gut microbiomes and provide new insight into host-microbiota coevolution of these endangered species.

关键词： gut microbiome metagenome convergent evolution starch and sucrose metabolism vitamin B12 giant panda red panda

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PandaGUT provides new insights into bacterial diversity, function, and resistome landscapes with implications for conservation

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MICROBIOME 2023年第1期11卷 221-221页

作者： Huang, Guangping Shi, Wenyu wang, Le Qu, Qingyue Zuo, Zhenqiang wang, Jinfeng Zhao, Fangqing Wei, fuwen Chinese Acad Sci Inst Zool CAS Key Lab Anim Ecol & Conservat Biol Beijing 100101 Peoples R China Chinese Acad Sci Inst Microbiol Microbial Resource & Big Data Ctr Beijing Peoples R China Chinese Acad Sci Beijing Inst Life Sci Lab Computat Genom Beijing 100101 Peoples R China Jiangxi Agr Univ Coll Forestry Nanchang 330045 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China

BackgroundThe gut microbiota play important roles in host adaptation and evolution, but are understudied in natural population of wild mammals. To address host adaptive evolution and improve conservation efforts of threatened mammals from a metagenomic perspective, we established a high-quality gut microbiome catalog of the giant panda (pandaGUT) to resolve the microbiome diversity, functional, and resistome landscapes using approximately 7 Tbp of long- and short-read sequencing data from 439 stool *** pandaGUT catalog comprises 820 metagenome-assembled genomes, including 40 complete closed genomes, and 64.5% of which belong to species that have not been previously reported, greatly expanding the coverage of most prokaryotic lineages. The catalog contains 2.37 million unique genes, with 74.8% possessing complete open read frames, facilitating future mining of microbial functional potential. We identified three microbial enterotypes across wild and captive panda populations characterized by Clostridium, Pseudomonas, and Escherichia, respectively. We found that wild pandas exhibited host genetic-specific microbial structures and functions, suggesting host-gut microbiota phylosymbiosis, while the captive cohorts encoded more multi-drug resistance *** study provides largely untapped resources for biochemical and biotechnological applications as well as potential intervention avenues via the rational manipulation of microbial diversity and reducing antibiotic usage for future conservation management of wildlife.6KUVWwvzFXHebBwiyZoAvnVideo AbstractConclusionsOur study provides largely untapped resources for biochemical and biotechnological applications as well as potential intervention avenues via the rational manipulation of microbial diversity and reducing antibiotic usage for future conservation management of wildlife.6KUVWwvzFXHebBwiyZoAvnVideo Abstract

关键词： Wild mammal Gut microbiome Giant panda Diversity Adaptive evolution Conservation

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Suppressing Exciton-Vibration Coupling to Prolong Exciton Lifetime of Nonfullerene Acceptors Enables High-Efficiency Organic Solar Cells

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ENERGY REPORTS 2024年第8期11卷 e202316227-e202316227页

作者： Zhu, Yufan He, Dan wang, Chong Han, Xiao Liu, Zesheng wang, Ke Zhang, Jianqi Shen, Xingxing Li, Jie Lin, Yuze wang, Chunru He, Yuehui Zhao, fuwen Cent South Univ State Key Lab Powder Met Changsha 410083 Peoples R China Cent South Univ Coll Chem & Chem Engn Changsha 410083 Peoples R China Univ Chinese Acad Sci Beijing 100190 Peoples R China Chinese Acad Sci Beijing Natl Lab Mol Sci CAS Key Lab Organ Solids Beijing 100190 Peoples R China Chinese Acad Sci Lab Mol Nanostruct & Nanotechnol Inst Chem Beijing 100190 Peoples R China

The limited exciton lifetime (tau, generally < 1 ns) leads to short exciton diffusion length (L-D) of organic semiconductors, which is the bottleneck issue impeding the further improvement of power conversion efficiencies (PCEs) for organic solar cells (OSCs). However, efficient strategies to prolong intrinsic tau are rare and vague. Herein, we propose a facile method to efficiently reduce vibrational frequency of molecular skeleton and suppress exciton-vibration coupling to decrease non-radiative decay rate and thus prolong tau via deuterating nonfullerene acceptors. The tau remarkably increases from 0.90 ns (non-deuterated L8-BO) to 1.35 ns (deuterated L8-BO-D), which is the record for organic photovoltaic materials. Besides, the inhibited molecular vibration improves molecular planarity of L8-BO-D for enhanced exciton diffusion coefficient. Consequently, the L-D increases from 7.9 nm (L8-BO) to 10.7 nm (L8-BO-D). The prolonged L-D of L8-BO-D enables PM6: L8-BO-D-based bulk heterojunction OSCs to acquire higher PCEs of 18.5% with more efficient exciton dissociation and weaker charge carrier recombination than PM6: L8-BO-based counterparts. Moreover, benefiting from the prolonged L-D, D18/L8-BO-D-based pseudo-planar heterojunction OSCs achieve an impressive PCE of 19.3%, which is among the highest values. This work provides an efficient strategy to increase the tau and thus L-D of organic semiconductors, boosting PCEs of OSCs.

关键词： Deuteration Exciton Diffusion Length Exciton Lifetime Exciton-Vibration Coupling Organic Solar Cells

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荆花胃康胶丸联合铋剂四联疗法治疗Hp感染十二指肠球部溃疡的内镜疗效和Hp根除率评价

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药物生物技术 2024年第6期31卷 678-682页

作者：王凤磊李静张福文李志红北京中医药大学东直门医院脾胃病科二区北京101121 北京中医药大学东直门医院脾胃病科一区北京100700

探究荆花胃康胶丸联合铋剂四联疗法对幽门螺杆菌(Hp)感染十二指肠球部溃疡(DU)患者内镜疗效和Hp根除率的影响,旨在为临床治疗提供循证医学证据。运用数字表法将2020年1月至2023年5月在本院就诊的82例Hp感染DU患者随机分为对照组(n=41)... 详细信息

探究荆花胃康胶丸联合铋剂四联疗法对幽门螺杆菌(Hp)感染十二指肠球部溃疡(DU)患者内镜疗效和Hp根除率的影响,旨在为临床治疗提供循证医学证据。运用数字表法将2020年1月至2023年5月在本院就诊的82例Hp感染DU患者随机分为对照组(n=41)和联合组(n=41),分别采取铋剂四联疗法治疗、荆花胃康胶丸联合铋剂四联疗法治疗,对比2组内镜疗效、Hp根除率、临床症状改善情况以及胃蛋白酶原[胃蛋白酶原Ⅰ(PGⅠ)、胃蛋白酶原Ⅱ(PGⅡ)]、胃泌素17(G-17)水平,并统计用药安全性。联合组治疗后临床总有效率和Hp根除率均为95.12%,高于对照组80.49%(P<0.05),腹痛、腹胀、嗳气和反酸症状评分低于对照组(P<0.05),PGⅠ、PGⅡ和G-17水平低于对照组(P<0.05)。相较单独铋剂四联疗法治疗,荆花胃康胶丸联合铋剂四联疗法治疗Hp感染DU疗效更佳,其在保证内镜疗效的同时,可明显提高Hp根除率,缓解临床症状,调节胃蛋白酶原和G-17水平,不良反应少。

关键词：十二指肠球部溃疡荆花胃康胶丸铋剂四联疗法幽门螺杆菌胃蛋白酶原胃泌素17 疗效根除率

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Enhanced oxidative activation of chlorine dioxide by divalent manganese ion for efficient removal of PAHs in industrial soil

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CHEMICAL ENGINEERING JOURNAL 2022年第0期434卷 134631-134631页

作者： Liu, Boshi Niu, Wenke Hu, Xiaojun Liu, fuwen Jiang, Jingxian wang, Huifeng wang, Shiyang Shanghai Inst Technol Sch Chem & Environm Engn Shanghai 201418 Peoples R China

Chlorine dioxide (ClO2) takes effect as a promising chemical oxidant to remove polycyclic aromatic hydrocarbons (PAHs) from contaminated soil in situ. However, the conventional ClO2 degradation procedure is limited by its reaction selectivity to organic pollutants, as well as its low economic efficiency with huge dosage. Systematical study of activated ClO2 oxidation which is more efficient to remove PAHs in soil is still scarce. Herein, the impact of divalent manganese ion [Mn(II)] on activating ClO2 to oxidize PAHs in real contaminated soil was currently studied, including the kinetics, degradation products, mechanisms, and biological toxicity. The results revealed that the PAHs removal rate constants (k(1)) had a quadratic relationship with Mn(II) concentrations (k(1) =-0.005 x [Mn(II)](2) + 0.0033 x [Mn(II)] + 0.0222, R-2 = 0.9084, [Mn(II)] = 0 similar to 5 mM), the best degradation performance was obtained when the molar ratio of Mn(II)/ClO2 was 1/20. Furthermore, the optimal initial ClO2 concentration of 2500 mg/L could satisfy the comprehensive considerations of efficiency and economy. At the pH range of 3 similar to 11, the removal efficiency decreased with increasing pH. Four representative PAH congeners (anthracene, phenanthrene, pyrene, and fluoranthene) had been chlorine substituted and oxygenated, but benzene ring rupture was observed only in fluoranthene simultaneously. XPS spectra, EPR analysis, and quenching experiments indicated the mechanisms that HOCl and .OH were the principal active species in the oxidation reaction. The toxicity evaluation by earthworms Eisenia fetida resulted out that high toxic effect to organism still remained in remediated soil which should be paid attention to.

关键词： Polycyclic aromatic hydrocarbons (PAHs) Industrial contaminated soil Chlorine dioxide (ClO2) Divalent manganese ion [Mn(II)] Oxidation Toxicity

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Re-dispersion of active Zn species on modified S-1 zeolite as an efficient catalyst for direct dehydrogenation of propane

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MICROPOROUS AND MESOPOROUS MATERIALS 2023年 348卷

作者： He, Junjie Zhang, Jie Chen, Jinwei Zhang, Jin wang, Gang Shi, Zongbo Yang, fuwen Zhao, Junyu Zhuo, Runsheng wang, Ruilin Sichuan Univ Coll Mat Sci & Engn Chengdu 610065 Peoples R China Sichuan Univ Engn Res Ctr Alternat Energy Mat & Devices Minist Educ Chengdu 610065 Peoples R China REZEL Catalysts Corp Shanghai 200120 Peoples R China Sichuan Univ Coll Mat Sci & Engn 24 South Sect 1Yihuan Rd Chengdu 610065 Peoples R China

Highly active and inexpensive catalysts for propane dehydrogenation (PDH) are required for largescale pro-pylene production in industrial application. Compared to Pt-and Cr-based catalysts, Zn-based nanomaterial is a promising candidate due to its environmental friendliness and coking-resistant but remains a great challenge. In this study, we developed a novel multi-component structure consisting of low Pt and abundant active Zn species highly dispersed on Fe-doped S-1 zeolite as PDH catalyst. Specifically, Fe-doping in S-1 support provided anchoring sites for loading Zn species with uniform distribution. Moreover, the very small amount of Pt was applied as promoter, which is beneficial to achieve the re-dispersion of Zn species with the formation of Zn delta+ and Zn2+ active sites. The resulting 0.05Pt5Zn1Fe@S-1 catalyst exhibited the outstanding performance (conversion of propane: 40%, selectivity of propylene: 85%, and yield of propylene: 31.39%) as well as satisfactory regen-eration ability. This improvement can be ascribed to the synergistic coupling between Pt promoter and the highly dispersed Zn species on modified S-1 support. This study opens a new way to design efficient and stable dehy-drogenation catalysts.

关键词： Propane dehydrogenation Propylene Zn-based catalyst Platinum

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