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Resistance of Cement-based Grouting Materials with Nano- SiO_(2) Emulsion to Chloride Ion Penetration

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 114-119页

作者： LI Shuiping cheng Jian WEI Chao yuan Bin YU chengxiao College of Architectural Science and Engineering Yangzhou UniversityYangzhou 225127China

The chloride penetration resistance of cement-based grout materials was improved by nano-silica *** of mixtures containing different nano-silica particles or emulsions were exposed in sodium chloride solutions of specific concentrations with different test *** properties of the mixes were assessed in terms of weight loss and compressive strength.X-ray diffraction(XRD)and scanning electron microscopy(SEM)of mixes were performed to analysis the phase evolution and *** results demonstrated that the introduction of nano-SiO_(2) emulsion significantly decreased the compressive strength loss and calcium hydroxide(CH)crystal content of hydration production,and then enhanced the resistance of cement-based grouting materials to chloride ion *** improvement derives from the filling and pozzolanic effects of nano-SiO_(2) particles,which were incorporated via an emulsion and attributed to a well dispersion in grouting matrix.

关键词： grouting materials nano-SiO_(2)emulsion chloride ion penetration,weight loss strength loss

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基于实时数据的应急交通疏散仿真方法研究

系统工程理论与实践 2015年第10期35卷 2484-2489页

作者：苑盛成王刚桥马晔风张辉清华大学工程物理系公共安全研究院北京100084

突发事件应急管理是非常态复杂系统问题,目前缺乏有效的研究手段.由于突发事件发生频率低,演化模型不明确,不确定性高的特点,在常态下广泛适用的传统仿真模型和基于数据的模型,通常难以直接应用在非常态情景中.本文提出了基于实时数据... 详细信息

突发事件应急管理是非常态复杂系统问题,目前缺乏有效的研究手段.由于突发事件发生频率低,演化模型不明确,不确定性高的特点,在常态下广泛适用的传统仿真模型和基于数据的模型,通常难以直接应用在非常态情景中.本文提出了基于实时数据的应急交通疏散仿真方法,通过融合仿真模型和数据分析技术,使仿真系统能够兼容常态与非常态仿真计算,增强了其在非常态下的适应能力.本文以大规模交通疏散为例设计了仿真方法,该方法可以提高应急状态下交通仿真系统的预测准确性,并有能力提供多种事件的可能发生方向,为交通疏散应急管理提供决策支持.

关键词：交通疏散数据分析数值仿真应急决策

“Zero‑Strain” NiNb_(2)O_(6) Fibers for All‑Climate Lithium Storage

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Nano-Micro Letters 2025年第1期17卷 348-360页

作者： Yan Zhao Qiang yuan Liting Yang Guisheng Liang Yifeng cheng Limin Wu Chunfu Lin Renchao Che College of Physics Donghua UniversityShanghai 201620People’s Republic of China School of Materials Science and Engineering Institute of Materials for Energy and EnvironmentQingdao UniversityQingdao 266071People’s Republic of China Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsAcademy for Engineering&TechnologyFudan UniversityShanghai 200438People’s Republic of China Zhejiang Laboratory Hangzhou 311100People’s Republic of China Inner Mongolia University Hohhot 010021People’s Republic of China

Niobates are promising all-climate Li^(+)-storage anode material due to their fast charge transport,large specific capacities,and resistance to electrolyte ***,their moderate unit-cellvolume expansion(generally 5%–10%)during Li^(+)storage causes unsatisfactory long-term ***,“zero-strain”NiNb_(2)O_(6) fibers are explored as a new anode material with comprehensively good electrochemical *** Li^(+)storage,the expansion of electrochemical inactive NiO_(6) octahedra almost fully offsets the shrinkage of active NbO_(6) octahedra through reversible O *** superior volume-accommodation capability of the NiO_(6) layers guarantees the“zero-strain”behavior of NiNb_(2)O_(6) in a broad temperature range(0.53%//0.51%//0.74%at 25//−10//60℃),leading to the excellent cyclability of the NiNb_(2)O_(6) fibers(92.8%//99.2%//91.1%capacity retention after 1000//2000//1000 cycles at 10C and 25//−10//60℃).This NiNb_(2)O_(6) material further exhibits a large reversible capacity(300//184//318 mAh g−1 at 0.1C and 25//−10//60℃)and outstanding rate performance(10 to 0.5C capacity percentage of 64.3%//50.0%//65.4%at 25//−10//60℃).Therefore,the NiNb_(2)O_(6) fibers are especially suitable for large-capacity,fast-charging,long-life,and all-climate lithium-ion batteries.

关键词： NiNb_(2)O_(6)porous fiber “Zero-strain”mechanism Electrochemical property Harsh-temperature operation Operando characterization

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无线Mesh网络轻量级容侵CA方案

计算机科学 2013年第12期40卷 200-204,232页

作者：郭萍傅德胜朱节中袁程胜南京信息工程大学计算机与软件学院南京210044 南京理工大学计算机科学与工程学院南京210094 南京信息工程大学滨江学院南京210044

为解决公钥体制过于复杂而难以在资源受限的无线环境中布署的问题,结合轻量级CA(Certification Authority)概念、(t,n)门限机制和椭圆曲线离散对数公钥体制,构建一个适用于无线Mesh网络的轻量型容侵LT-CA(Lite Tolerant CA)方案。分析表... 详细信息

为解决公钥体制过于复杂而难以在资源受限的无线环境中布署的问题,结合轻量级CA(Certification Authority)概念、(t,n)门限机制和椭圆曲线离散对数公钥体制,构建一个适用于无线Mesh网络的轻量型容侵LT-CA(Lite Tolerant CA)方案。分析表明,LT-CA简化了传统基于证书CA公钥产生、验证及管理的复杂性,具有公钥产生轻量化、公钥验证轻量化、无需证书管理的特点;在没有显著增加系统复杂性的情况下,采用门限机制使LT-CA私钥具有容侵能力,可抵御无线环境下易于实施的多种攻击。

关键词：无线Mesh网络椭圆曲线密码门限机制轻量级CA

Exploration of Gas‑Dependent Self‑Adaptive Reconstruction Behavior of Cu_(2)O for Electrochemical CO_(2)Conversion to Multi‑Carbon Products

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Nano-Micro Letters 2025年第3期17卷 280-296页

作者： Chaoran Zhang Yichuan Gu Qu Jiang Ziyang sheng Ruohan Feng Sihong Wang Haoyue Zhang Qianqing Xu Zijian yuan Fang Song State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Structural reconstruction of electrocatalysts plays a pivotal role in catalytic performances for CO_(2)reduction reaction(CO_(2)RR),whereas the behavior is by far superficially ***,we report that CO_(2)accessibility results in a universal self-adaptive structural reconstruction from Cu_(2)O to Cu@CuxO composites,ending with feeding gas-dependent microstructures and catalytic *** CO_(2)-rich atmosphere favors reconstruction for CO_(2)RR,whereas the CO_(2)-deficient one prefers that for hydrogen evolution *** the assistance of spectroscopic analysis and theoretical calculations,we uncover a CO_(2)-induced passivation behavior by identifying a reductionresistant but catalytic active Cu(I)-rich amorphous layer stabilized by*CO ***,we find extra CO production is indispensable for the robust production of *** inverse correlation between durability and FECO/FEC2H4 is disclosed,suggesting that the selfstabilization process involving the absorption of*CO intermediates on Cu(I)sites is essential for durable *** by this insight,we design hollow Cu_(2)O nanospheres for durable and selective CO_(2)RR electrolysis in producing *** work recognizes the previously overlooked passivation reconstruction and self-stabilizing behavior and highlights the critical role of the local atmosphere in modulating reconstruction and catalytic processes.

关键词： CO_(2)reduction reaction Electrocatalysts Cu_(2)O Reconstruction Self-adaptive electrocatalysis

MOFs-derived copper@nitrogen-doped carbon composite for the selective electroreduction of CO2

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MOFs-derived copper@nitrogen-doped carbon composite for the ...

Synthesis of C60-, N-RGO-, and RGO-based SnO2 Nanocomposite Photocatalysts: A Comparative Study

中国化学会第十届全国无机化学学术会议

作者： yuan-sheng cheng Xin-Ping Chu Min Ling Na Li Kong-Lin Wu Fang-Hui Wu Hong Li Guo-Zan yuan Xian-Wen Wei School of Chemistry and Chemical Engineering Institute of Materials Sciences and Engineering Anhui University of Technology College of Chemistry and Materials Science Key Laboratory of Functional Molecular Solids the Ministry of Education Anhui Normal University

Development of Cu-based complex electrocatalysts is more easily to achieve a high activity and selectivity for reducing CO to multi-carbon hydrocarbons, exploring the synergistic effect between Cu and other materials may help the design of high efficient catalysts. This paper reports an impact factor for synergistic effect between Cu and nitrogen doped carbon(NC) support by comparing CO reduction reaction(CO RR) performances on MOFs-derived Cu-NC catalysts obtained by calcining N-containing benzimidazole(BEN) modified Cu-BTC(1, 3, 5-benzenetricarboxylic acid) MOFs(BEN-Cu-BTC) at different temperatures. The characterization and experimental results indicate that high contents of pyrrolic-N and pyridinic-N doped carbon support formation at low annealing temperature can facilitate the C-product generation on Cu surface, with the faradaic efficiency for ethylene(11%) and ethanol(18%) achieving at-1.01 V(vs. reversible hydrogen electrode), while high contents of graphitic-N or N-free samples show a completely different features. This means that the catalytic activity on MOFs-derived Cu-NC catalyst can be controlled by N-types changes dominating of annealing temperatures, offering a new tack for designing highly selective complex catalysts.

关键词： Copper Nitrogen-doped carbon Composite catalysts Electroreduction Carbon dioxide

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Synthesis of C60-, N-RGO-, and RGO-based SnO2 Nanocomposite ...

Recent progress on photoactive nonprecious transition-metal complexes

中国化学会第十届全国无机化学学术会议

作者： Min Ling yuan-sheng cheng Pei-yuan Zeng Xiao Li Shan-Hui Xia Kong-Lin Wu Si-Yu Wang Qian-Qian Zhang Xian-Wen Wei College of Chemistry and Materials Science Key Laboratory of Functional Molecular Solids the Ministry of EducationAnhui Normal University School of Chemistry and Chemical Engineering Institute of Materials Sciences and Engineering Anhui University of Technology

In this paper, a series of SnO nanocomposites modified by [60]Fullerene(C), reduced graphene oxides(RGO) and nitrogen-doped RGO(N-RGO) with different weight ratios are prepared via simple absorbing and hydrothermal methods. The dye photosensitization degradation under visible light irradiation is enhanced observably with the introduced carbon materials, which is ascribed to the broaden light absorption region of catalyst and the increased adsorption of dye by the catalyst. . The optimum weight ratios of the composites are 1.25 wt% C-SnO, 7.5 wt%N-RGO-SnO and 5 wt % RGO-SnO, their degradation rates for rhodamine B(RhB) are about 13.9, 18.8 and 11.1 times higher than pure SnO under visible light irradiation, respectively. The degradation effect of dyes was affected by the differences in adsorbability of carbon materials on dyes. This study proposes that N-RGO was used as an electron donor to transfer electrons to SnO, which is different from the electron transmission paths of C/RGO-SnO. C and RGO receive electrons from SnO as electron receptors, which reduces the recombination of photogenic electron hole pairs thus improves the photocatalytic ability. We hope this concept could provide a primitive understanding of the photocatalytic reaction process at the level of electron transfer pathway and new insights to construct more efficient carbon-based nanocomposites.

关键词： Carbon SnO2 Composites Photocatalysis Dye degradation

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Science China Chemistry 2025年第1期68卷 46-95页

作者： Zhong-Liang Gong Hong-Jie Zhang Yan cheng Jianxun Liu Yuhan Ai Yaqin Li Zhihui Feng Qiong Zhang Shaolong Gong Yong Chen Chang-Jiang Yao yuan-yuan Zhu Liang-Jin Xu Yu-Wu Zhong CAS Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences State Key Laboratory of Structural Cemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of Technology State Key Laboratory of Explosion Science and Safety Protection School of Mechatronical Engineering Beijing Institute of Technology College of Chemistry and Molecular Sciences Hubei Key Lab on Organic and Polymeric Optoelectronic Materials Wuhan University School of Chemistry and Chemical Engineering Anhui University Key Laboratory of Photochemical Conversion and Optoelectronic Materials & CAS-HKU Joint Laboratory on New Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences

Photoactive complexes of nonprecious transition metals, mainly including those in the first-row and partially the second-row of the Periodic table of elements, have received increasing attention in view of their low cost and long-term sustainability. They are recognized as promising alternatives to noble transition metal complex congeners that have been extensively studied in optoelectronic devices, artificial photosynthesis, photocatalysis, biodiagnostics, and therapeutics, etc. This review is devoted to a comprehensive summary on the classical and recent advances on photoactive nonprecious transition metal complexes, including photoactive Zr, V, Cr, Mo, and W complexes, Mn complexes and hybrids, Fe, Co, Ni, and Cu complexes, and Zn and Cd complexes and hybrids. A particular focus is given on the molecular design, modulation of photophysical and photochemical properties, and applications of the representative and lately-developed nonprecious metal complexes. In addition, a perspective on the future development in this field is provided at the end of this review.

关键词： photoactive metal complexes earth-abundant metals nonprecious metal complexes luminescence photochemistry

高碘酸钠和戊二醛交联法构建的R-藻红蛋白-C-藻蓝蛋白交联物能量传递效率的比较研究

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生物化学与生物物理进展 2004年第3期31卷 273-277页

作者：王广策马圣媛曾呈奎中国科学院海洋研究所实验海洋生物学开放实验室青岛266071

从单细胞蓝藻钝顶螺旋藻中纯化C 藻蓝蛋白 ,从海洋红藻多管藻纯化R 藻红蛋白 .分别用高碘酸钠氧化法和戊二醛法将二者共价连接为R 藻红蛋白 C 藻蓝蛋白交联物 ,再用SephadexG 2 0 0柱层析纯化 .光谱分析表明 ,用两种方法构建的共价交... 详细信息

从单细胞蓝藻钝顶螺旋藻中纯化C 藻蓝蛋白 ,从海洋红藻多管藻纯化R 藻红蛋白 .分别用高碘酸钠氧化法和戊二醛法将二者共价连接为R 藻红蛋白 C 藻蓝蛋白交联物 ,再用SephadexG 2 0 0柱层析纯化 .光谱分析表明 ,用两种方法构建的共价交联物都可以将激发能从R 藻红蛋白传递到C 藻蓝蛋白 .二者相比 ,高碘酸钠氧化法构建的共价交联物的能量传递效率更高 .

关键词： R-藻红蛋白 C-藻蓝蛋白高碘酸钠氧化交联法戊二醛交联法共价交联物光谱分析传能效率