Water pollution represents one of the most important problems affecting the health of living organisms, so it was necessary to work on the formation of active materials to get rid of pollutants. In this study, Titanium dioxide (TiO₂) doping Zinc oxide (ZnO) nanocomposites were produced via simple sonication method at 500 Hz in ethanol medium. At different weight concentrations (2.5, 5, 7.5, and 10 %). The morphology, structure configuration, chemical bonding, crystalline phase, and surface properties of obtained nanocomposites were characterized via FESEM, BET, XRD, XPS, RAMAN and FTIR instrumentation. The nanocomposites were employed as an adsorbent to eliminate the methyl orange (MO) and Indigo Carmine (IC) dyes from an aqueous solution. Batch removal experiments revealed that the elimination of MO and IC dyes by the TiZnO surface was pH and doping Ti concentration-dependent, with maximum removal occurring at pH = 7 for MO and pH = 3 for IC contaminants at 10 % doping Ti concentration (Ti (10 %)@ZnO). Langmuir model fit the absorptive removal of MO and IC dyes into the Ti (10 %)@ZnO surface well. The maximal removal capacity of Ti (10 %)@ZnO nanocomposite was found to be 994.24 mg. g⁻¹ for MO and 305.39 mg. g⁻¹ for IC. The Ti (10 %)@ZnO nanocomposite showed remarkable high stability towards the removal of both dyes through consecutive four cycles.

Pure and doped lithium titanate samples (Li₄Ti₅O₁₂, Li₄Ti_4.9x_0.1O₁₂, x = Ni²⁺, Cu²⁺ and Zn²⁺) are prepared using a simple solid state reaction. All lithium titanate samples are characterized using X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy. X-ray diffraction patterns show a cubic spinel structure of Li₄Ti₅O₁₂ with different contents of a Li₂TiO₃ crystalline second phase, high for the doped samples and low for the pure one. Fourier transform infrared spectra also confirm the spinel structure. Scanning electron microscopy shows block-shaped particles with different particle size distributions. The pure lithium titanate composite sample shows more efficient electrochemical performance than the doped ones at high discharge rates (2–30C) and the opposite is observed at low ones (0.1, 0.5C). The efficiency and cycle life of the pure lithium titanate composite at a high rate (30C) are higher and better than that at a low one (0.1C), making the pure composite a promising anode material for high rate lithium-ion batteries. All results are collected and discussed.