Stable sodium-ion battery anode enabled by encapsulating Sb nanoparticles in spherical carbon shells

Journal of Solid State Electrochemistry - Antimony (Sb) has been recognized as one of the most promising metal anode materials for sodium-ion batteries, owing to its high capacity and suitable...     

Mechanochromic Behavior of Aryl‐Substituted Buta‐1,3‐Diene Derivatives with Aggregation Enhanced Emission

Three tetra‐aryl substituted 1,3‐butadiene derivatives with aggregation enhanced emission (AEE) and mechanochromic fluorescence behavior have been rationally designed and synthesized. The results suggest an effective design strategy for developing diverse materials with aggregation induced emission (AIE) and significant mechanochromic performance by employing D ‐π‐A structures with large dipole moments.     

Effect of EPDM Content on Melt Flow,Microstructures and Fracture Behavior of Dynamically Vulcanized PP/EPDM Blends

Polypropylene (PP)/Ethylene‐propylene‐diene terpolymer (EPDM) blends were dynamically vulcanized with dicumyl peroxide (DCP), using a two‐step method of even dispersion of DCP in EPDM at first and then cross‐linking at elevated temperature. The results showed that though both chain scission and cross‐linking occurred, the cross‐linking reaction predominated in this process and the number of EPDM particles was increased, accompanied with a reduction in particle size and uniform dispersion. Differential scanning calorimetry (DSC) results indicated the existence of PP/EPDM graft copolymer. The essential work of fracture (EWF) results showed that both the specific essential work of fracture (w _e ) and the specific plastic work (w _p ) increased with increasing EPDM content, the fracture toughness and plastic energy consumption (βw _p ) could be improved simultaneously and the ratio of w _e and βw _p could be controlled by adjusting EPDM and DCP content.     

A synthesis of high-efficiency Pd-Cu-Cl(x)/Al(2)O(3) catalyst for low temperature CO oxidation

Pd-Cu-Cl(x)/Al(2)O(3) catalysts were prepared by a NH(3) coordination-impregnation method and exhibited an excellent activity for low-temperature CO oxidation and 100% CO conversion was obtained at -30 °C for 400 ppm CO and 1000 ppm H(2)O/air.     

Stability analysis of one-leg methods for nonlinear functional differential and functional equations

This paper is concerned with the numerical solution of nonlinear functional differential and functional equations. The adaptation of one-leg methods is considered. It is proved that an A-stable one-leg method is globally stable and a strongly A-stable one-leg method is asymptotically stable under suitable conditions. A numerical test is given to confirm the theoretical results.     

大数据服务深度需求与SOA协作集成的异构系统融合机制

大数据服务需求的认知深度和服务架构的融合度直接影响多业务大数据应用的资源管理和服务质量,本文提出了一种基于大数据服务深度需求分析和面向服务的协作集成架构的异构系统融合机制。该机制,一方面,在分析大数据源多样化、差异化大数据组织形式及其存储方式,结合不同类型用户的需求差异化特征,建立了大数据服务需求分析模型。另一方面,对于多态异构的移动互联网大数据服务,经过结构化和开放性处理后,给出大数据通信和服务调用描述定义,提出了SOA协作集成的异构系统融合架构。仿真实验结果表明,所提出的算法在大数据服务响应成功率、执行时间和代价比等方面具有明显优势。     

Simultaneous separation and determination of thallium in water samples by high‐performance liquid chromatography with inductively coupled plasma mass spectrometry

An analytical method for separation and determination of thallium species in water using high‐performance liquid chromatography with inductively coupled plasma mass spectrometry was developed. The composition and concentration of mobile phase, injection volume, and pH value were optimized respectively with an anion or cation exchange column. The results showed that Tl(I) and Tl(III) were effectively separated using anion exchange column Hamilton PRP‐X100, with the mobile phase consisting of 200 mmol/L ammonium acetate and 10 mmol/L diethylenetriaminepentaacetic acid (pH = 4.2). When using a Dionex cation exchange guard column, CS12A, 15 mmol/L HNO₃, and 3 mmol/L diethylenetriaminepentaacetic acid as the mobile phase, Tl(I) and Tl(III) could be effectively separated. The detection limits of the methods were 3–6 and 9–12 ng/L, respectively. In a solution containing Fe ions and oxalic acid, a significant quantity of Tl(I) was oxidized. Fe ions and oxalic acid in the water samples did not interfere with high‐performance liquid chromatography‐inductively coupled plasma mass spectrometry measurement results.     

Dissipativity of Runge-Kutta methods for Volterra functional differential equations

This paper is concerned with the numerical dissipativity of nonlinear Volterra functional differential equations (VFDEs). We give some dissipativity results of Runge-Kutta methods when they are applied to VFDEs. These results provide unified theoretical foundation for the numerical dissipativity analysis of systems in ordinary differential equations (ODEs), delay differential equations (DDEs), integro-differential equations (IDEs), Volterra delay integro-differential equations (VDIDEs) and VFDEs of other type which appear in practice. Numerical examples are given to confirm our theoretical results.     

Electrochemical Sensor Based on Molecularly Imprinted Polymer Film Prepared with Functional Abietic‐Type Acids as Cross‐Linker for the Determination of Quinine

A novel cross‐linker (functional abietic‐type acids) for preparing highly sensitive, molecularly imprinted sensors was proposed for quinine determination. A MIP film was created on a glassy carbon electrode for determination of quinine using free radical polymerization method. The modification procedure was characterized via electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The interaction between functional monomer and target molecule was observed by UV spectrometric methods. Under the optimal experimental conditions, the peak currents were proportional to the concentrations of quinine in the range from 8.0×10^?7 to 2.6×10^?4 M with a detection limit of 2.0×10^?8 M. Meanwhile the prepared sensor showed sensitive and selective binding sites for quinine. Determination of quinine in tonic water showed good recovery.