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This work focused on synthesising Ni-doped LiNixFe1−xPO4/C (x = 0, 0.05 and 0.1) cathode materials by hydrothermal method. The crystalline structure and morphology of the synthesised materials were investigated through x-ray diffraction, Raman scattering spectroscopy, thermal gravimetric analysis, and scanning electron microscopy. Their electrochemical performance was analysed by cyclic voltammetry and galvanostatic cycling test. The highest initial capacity of 170.3 mAh/g was achieved for LiNi0.1Fe0.9PO4/C. It also maintained 99.68% of its initial capacity for 120 cycles, with a Li+-ion diffusion coefficient of 1.12 × 10−12 cm2/s compared with that (9.21 × 10−13 cm2/s) of LiNi0.05Fe0.95PO4/C. [ABSTRACT FROM AUTHOR]

In this study, a 0.2CoFe2O4/0.8TiO2-5%La nanocomposite was synthesized by a co-precipitation and a hydrothermal method and then was applied as a high activity photocatalyst for degradation of methylene blue under visible light irradiation. The 0.2CoFe2O4/0.8TiO2-5%La material was characterized by X-ray diffraction, Raman spectra, scanning electron microscope/transmission electron microscope and UV-Vis techniques. The photocatalytic activity of the material was initially investigated through the decomposition of methylene blue. The synthetic 0.2 CoFe2O4/0.8 TiO2-5% La showed excellent photocatalytic activity for degradation of methylene blue under visible light irradiation. Methylene blue could be degraded by more than 99.14% after only 50 min. [ABSTRACT FROM AUTHOR]

We propose here an electrochemical platform for multi-heavy metal ion detection in water based on MIL-88B(Fe)-NH 2 , an amine-functioned metal-organic framework (MOF) for modifying the surface of a glassy carbon electrode (GCE). Herein, MIL-88B(Fe)-NH 2 with abundant functionalized amine groups can play the role of capture sites for the enrichment of metal ions before electrochemical oxidation sensing. MIL-88B(Fe)-NH 2 was synthesized under optimized conditions through a solvothermal method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transition electron microscopy (TEM), Fourier-transform infrared spectroscopy (FT-IR), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques. MIL-88B(Fe)-NH 2 was then drop-casted on GCE to electrochemically determine the Cd 2+ , Pb 2+ and Cu 2+ ion concentrations by differential pulse voltammetry (DPV). The electrochemical sensor exhibits excellent electrochemical performance toward Cd 2+ , Pb 2+ and Cu 2+ ions in the large linear ranges of 0.025-1.000 μM, 0.3-10.0 μM and 0.6-10.0 μM with limits of detection that are 2.0 × 10 -10 M, 1.92 × 10 -7 M and 3.81 × 10 -7 M, respectively. The fabricated sensor also shows high reliability and good selectivity. This MIL-88B(Fe)-NH 2 application strategy is promising for the evaluation of various heavy metal ions in water., Competing Interests: There are no conflicts to declare., (This journal is © The Royal Society of Chemistry.)