Anhui Normal University

About: Anhui Normal University is a education organization based out in Wuhu, China. It is known for research contribution in the topics: Catalysis & Population. The organization has 7955 authors who have published 7309 publications receiving 117443 citations.

Copper Dendrites : Synthesis, Mechanism Discussion, and Application in Determination of L-Tyrosine

Abstract: Highly uniform copper dendrites were successfully prepared in large quantities using a facile hydrothermal approach, which was prepared from the reaction of cupreous nitrate and sodium hypophosphit...

Synthesis, properties and applications of flowerlike Ni–NiO composite microstructures

Abstract: In this paper, we report the successful synthesis of flowerlike Ni–NiO composite microstructures with room-temperature magnetism via a simple water–DMF (N,N-dimethylformamide) mixed solvothermal process with sequential thermal treatment, using sodium hypophosphite hydrate (NaH2PO2·H2O) and nickel sulfate (NiSO4·6H2O) as the starting reactants. The phase and morphology of the as-prepared product are characterized by means of powder X-ray diffraction, energy dispersive spectrometry, selected area electron diffraction (SAED), transmission electron microscopy, and scanning electron microscopy. Experiments show that the flowerlike Ni–NiO composite microstructures are obtained by the shape-preserved conversion of the precursor. Our investigation reveals that the as-prepared flowerlike Ni–NiO composite microstructures exhibit good electrochemical responses in 1 M NaOH solution and can be used as an electrochemical catalyst for the oxidation of methanol. Also, the as-prepared flowerlike Ni–NiO composite microstructures have a stronger catalytic activity for the chemical reduction of 4-nitrophenol to 4-aminophenol by NaBH4 than pure Ni nanospheres or flowerlike NiO microstructures.

Determination of rutin using a CeO2 nanoparticle-modified electrode

Abstract: CeO2 nanoparticles approximately 12 nm in size were synthesized and subsequently characterized by XRD, TEM and UV-vis spectroscopy. Then, a gold electrode modified with CeO2 nanoparticles was constructed and characterized by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The modified electrode demonstrated strong catalytic effects with high stability towards electrochemical oxidation of rutin. The anodic peak currents (measured by differential pulse voltammetry) increased linearly with the concentration of rutin in the range of 5.0 × 10−7–5.0 × 10−4 mol · L−1. The detection limit (S/N = 3) was 2.0 × 10−7 mol · L−1. The relative standard deviation (RSD) of 8 successive scans was 3.7% for 5.0 × 10−6 mol · L−1 rutin. The method showed excellent sensitivity and stability, and the determination of rutin in tablets was satisfactory.

Facile Phosphine-Free Synthesis of CdSe/ZnS Core/Shell Nanocrystals Without Precursor Injection

Abstract: A new simple method for synthesis of core/shell CdSe/ZnS nanocrystals (NCs) is present. By adapting the use of cadmium stearate, oleylamine, and paraffin liquid to a non-injection synthesis and by applying a subsequent ZnS shelling procedure to CdSe NCs cores using Zinc acetate dihydrate and sulfur powder, luminescent CdSe/ZnS NCs with quantum yields of up to 36% (FWHM 42–43 nm) were obtained. A seeding-growth technique was first applied to the controlled synthesis of ZnS shell. This method has several attractive features, such as the usage of low-cost, green, and environmentally friendlier reagents and elimination of the need for air-sensitive, toxic, and expensive phosphines solvent. Furthermore, due to one-pot synthetic route for CdSe/ZnS NCs, the approach presented herein is accessible to a mass production of these NCs.

Computational design of inorganic nonlinear optical crystals based on a genetic algorithm

Abstract: Based on the results of density functional theory calculations, a theoretical method to design inorganic nonlinear optical (NLO) crystals for second harmonic generation (SHG) is presented. In this method, a specialized genetic algorithm (GA) is developed to search the stable structures of the inorganic crystal with known compositions and study the noncentrosymmetric stable structures and the second-order nonlinear optical properties by calculating the corresponding SHG coefficients. Unlike normal GA techniques, the main feature of the present method is that the coordination fashions of the building units are introduced to construct the structures of individuals during the GA procedure, which can obviously improve the efficiency and success rate of obtaining the stable structure of the inorganic crystals. As typical examples, two ternary compounds, AgGaS2 and LiAsSe2 crystals are considered, and besides the structures observed experimentally, the geometries and optical performance of other metastable (or more stable) phases have been explored. Our results clearly demonstrate that the present method can provide a feasible way to design and optimize new inorganic NLO crystals.