Solid State Phenomena Vol. 330

Abstract: Li₄Ti₅O₁₂/SnO₂ composite with different SnO₂ contents were prepared by hydrothermal method. SnO₂ nanosheets were in situ formed on the surface of Li₄Ti₅O₁₂ nanoparticles. At the same time, Sn ions were doped into the Li₄Ti₅O₁₂ lattice, which effectively improved the conductivity of Li₄Ti₅O₁₂. When the content of SnO₂ was 8 %, the electrochemical performance of Li₄Ti₅O₁₂/SnO₂ composite was the best. The first discharge specific capacity was 480.54 mAh/g. The capacity remained at 276.8 mAh/g after 200 cycles at 0.1 A/g, and the capacity retention was as high as 87.4% (compared with the 10th cycle).

Abstract: A non-enzymatic glucose sensing nanomaterial which consists of the NiCo₂O₄ nanosheets grown on reduced graphene oxide (NiCo₂O₄@rGO) is synthesized by a simple co-precipitation procedure. Firstly, the morphology and composition of the NiCo₂O₄@rGO are analyzed. Subsequently, the glucose sensing characteristics of the NiCo₂O₄@rGO are researched by Cyclic Voltammetry and Amperometry. The test results show that the prepared NiCo₂O₄@rGO has excellent glucose sensing properties. In the two linear detection range of 0.01mM-5.50mM and 5.50mM-15.50mM, the sensitivity reaches 4372.9μA·mM^-1cm^-2 and 1686.1μA·mM^-1cm^-2, respectively. In addition, in order to reduce the cost of electrochemical testing and improve the convenience and practicability of detection, a portable potentiostatic glucose detection system based on three electrodes is designed. Through testing, it is found that the non-enzymatic glucose detection system based on NiCo₂O₄@rGO has good practical application potential in the field of glucose detection.

Abstract: Multilayer films exhibit high saturation magnetization, high permeability, and high cutoff frequency f_r, applying to magnetic inductors that satisfy both high frequency, miniaturization, and integration. In this work, we fabricate Fe/Ni₈₁Fe₁₉/Fe (t/100/t nm) multilayer films on Si (100) using electron beam evaporation, and investigate the Fe thickness dependence of surface morphology, saturation magnetization, coercivity, and ferromagnetic resonance f_r. The results demonstrate that Fe/Ni₈₁Fe₁₉/Fe (4/100/4 nm) multilayer film possess relatively high saturation magnetization (12.1 kGs), low coercivity (3.1 Oe), and high ferromagnetic resonance f_r (1.93 GHz).

Abstract: The application of selenium and mercury and the raw materials for extracting selenium and mercury were introduced. The current separation and extraction processes of selenium and mercury were described in detail, including pyrometallurgy and hydrometallurgy process, in addition to oxygen pressure leaching method and complex acid leaching method.

Abstract: We reported a facile solvothermal approach to synthesize C/N-doped TiO₂ (C/N-T) using a template-free method. The morphology and composition of the C/N-T were evaluated by transmission electron microscopy, X-ray diffraction, wavelength dispersive spectroscopy and X-ray photoelectron spectroscopy. The photodegradation of formaldehyde was studied in environmental chambers under specific conditions combined with UV-Vis determinations. The catalytic oxidations of C/N-T nanoparticles were characterized by degrading formaldehyde of plywood, which was induced via visible-light illumination. A maximum 95.7% of degradation efficiency within 55 min showed enhanced photocatalytic activity.