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Layered double hydroxides (LDHs) are ideal electrode materials for pseudo capacitors because of their abundant metal active centers, high specific capacitance and high energy deny. Nico-LDH Nano sheets were prepared by a impede solvothermal method using ZIF-67 precursor as cobalt source. In solvothermal process, the Nano sheet constructed by cation exchange of Ni2+ and Co2+ can not only promote electron migration, but also expose more active sites' which !s conducive to the rapid transfer of electrolyte ions and Faraday reaction rate. In addition the electrochemical properties were improved by adjusting the amount of nickel source. The opti¬mized Nico-LDH-(1 : 2) has fast ion transfer capability and excellent magnification performance, and achieves high specific capacitance of 1 356.8 F/g at current density of 1 A/g and retention of specific capacitance of 68.7% at 30 A/g. The named asymmetric energy storage device exhibits a high energy density of 34.31 Why/kg at a power deny of 750 W/kg. [ABSTRACT FROM AUTHOR]

Lithium titanate (LTO) anode has Receded extensive attention due to IS high safety and long cycle life. Here, S atoms was doped into LTO as an anode material for lithium ion batteries by solvothermal method, and IS electrochemical properties were investigated. The X-ray diffraction (XRD) results showed that the introduced S atoms replaced Ti4+, which increased the late volume and conductivity of LTO. Scanning electron microscopy (SEM) results showed that the LTO particle size was reduced due to the interference of S atoms on the crystal growth of LTO. The rate performance of sulfur-doped LTO (S-LTO) was investigated by charge- discharge tests, and the results showed that S-LT()-1.5 had the best performance, exhibiting 143.8 mA • h/g at 20 C and still having 137.4 mA • h/g after 1000 cycles. The results of electrochemical impedance (EIS), cyclic voltammetry (CV) and galvanostatic intermittent titration technique (GITT) showed that the increased lattice volume and conductivity promoted the movement of Li+ and electrons in S-LTO-1.5, reduced the polarization, and thus enhanced electrochemical properties. [ABSTRACT FROM AUTHOR]

To improve the drug loading rate of mesoporous silica (mSiO2), mSiO2 nanorods were synthesized by a modified sol‐gel method, then mSiO2@ZIF‐8 nanoparticles were prepared by using mSiO2 nanorods as the matrix. The structure of mSiO2 and mSiO2@ZIF‐8 were characterized. The results show that mSiO2@ZIF‐8 nanoparticles are corn‐like, with a specific surface area of 116.81 m2 g−1, pore volume of 0.31 cm3 g−1, and pore size of 8.43 nm. Curcumin (CUR) was used as an anti‐tumor model drug in drug delivery experiments. The drug loading rate of mSiO2@ZIF‐8 for CUR is 21.39 %. Before modification by Chitosan (CS) and folic acid (FA), the cumulative release rate of CUR is 30.27 % at pH 5.6 and 26.26 % at pH 7.4. After been target functionalized by CS and FA. At pH 5.6 and pH 7.4, the cumulative release rates are 34.21 % and 20.48 %, respectively, within 228 h after drug release in vitro. The results show that the drug delivery system has good pH responsiveness. Zero‐order, first‐order, Higuchi, Hixson Crowell, and Korsmeyer Peppas models were used to describe the release kinetics of mSiO2@ZIF‐8@CUR. The Higuchi model provides the highest fit for the CUR release of mSiO2@ZIF‐8@CUR. [ABSTRACT FROM AUTHOR]

Low capacity and poor rate performance are still the main obstacles to the application of lithium titanate as anode materials for lithium-ion batteries. In this paper, commercial lithium titanate was used as the substrate, and the solvothermal method was used to realize the co-coating of C and SnSx in one step. The rough surface of LTO can provide a large number of accessible active sites for the nucleation of glucose molecules, and Sn4+ can be tightly adsorbed by the abundant hydroxyl groups of glucose molecules. SnSx grows slowly and excessively small SnSx nanosheets tend to aggregate to form discrete microspheres. As a binder, glucose inhibits the growth and accumulation of large-sized layered SnSx, mediates the formation of small-sized SnSx nanosheets and promotes its coverage on the LTO surface. The electrochemical test results showed that the first discharge specific capacity of SnSx@C/LTO was 274.47 mA h g−1 at 10C. After 500 cycles, the capacity reached 227.53 mA h g−1, and the capacity retention rate was up to 82.89%. In addition, the LFP//SnSx@C/LTO full battery had a capacity of 150 mA h g−1 at 10C, which was better than that of the LFP//LTO (10C 68.6 mA h g−1). [ABSTRACT FROM AUTHOR]

Developing highly active catalysts with the combined advantages of molecular and solid catalysis is considered as the "Holy Grail" in the area of catalysis research. Herein, a phosphorus‐doped porous polymer‐immobilized palladium was successfully developed as an efficient, robust, and recyclable catalyst for the carbonylative Suzuki coupling and alkoxycarbonylation reactions of aryl halides. Rather than just as an immobilizing molecular catalyst, palladium supported on phosphorus‐doped porous organic polymer exhibits even better catalytic performances than that of its analogue homogeneous catalysts in both carbonylation reactions. Moreover, the catalyst can be easily separated and reused for at least 5 times without significant loss in reactivity. Importantly, the catalyst was highly stable under carbonylation reaction conditions, and no palladium nanoparticle was observed even after the 5th reuse. In this work, a phosphorus‐doped porous polymer‐immobilized palladium was successfully developed as a highly efficient, robust, and recyclable catalyst for the carbonylative Suzuki coupling and alkoxycarbonylation reactions of aryl halides. The catalyst exhibits better catalytic performances than its analogue homogeneous catalysts in both carbonylation reactions. Moreover, the catalyst can be used up to several consecutive recycles with negligible metal leaching. [ABSTRACT FROM AUTHOR]