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Tian D.,Huainan Normal College | Tian D.,Lakeland College
Advanced Materials Research | Year: 2012

Mesoporous silicas SBA-15 with Ag nanoparticles in the channel was synthesized by one-step method. Samples characterzation were performed by the XRD, TEM, adsorption/desorption of nitrogen and ICP-AES. And the heterogeneous catalysis(Ag/SBA-15) shows catalytic activity in three-component coupling reaction of aldehyde, alkyne, and amine. © (2012) Trans Tech Publications, Switzerland.

Yong G.-P.,Hefei University of Technology | Tian D.,Hefei University of Technology | Tian D.,Huainan Normal College | Tong H.-W.,Hefei University of Technology | Liu S.-M.,Hefei University of Technology
Journal of Molecular Catalysis A: Chemical | Year: 2010

The mesoporous SBA-15 supported silver nanoparticles catalyst system with a highly ordered hexagonal mesostructure was prepared by an in situ reduction method using hexamethylenetetramine as mild and efficient reducing agent. These AgSBA-15 materials act as environmentally friendly catalysts in A3-coupling reactions of aldehydes, amines, and terminal alkynes with glycol as a "green" solvent. It is also found that the maximum reaction yield has been obtained for an average Ag-nanoparticle size of about 8 nm. The catalyst could also be recovered easily and used repetitively four times without significantly affecting the catalytic activity. The heterogeneous catalysts were fully characterized by N2 adsorption and desorption, XRD, TEM, ICP and XPS. © 2010 Elsevier B.V. All rights reserved.

Xu X.-J.,Nanjing University of Aeronautics and Astronautics | Xu X.-J.,Huainan Normal College | Wang Y.-R.,Nanjing University of Aeronautics and Astronautics
Tien Tzu Hsueh Pao/Acta Electronica Sinica | Year: 2014

The fractional wavelet transform extend the analysis method of wavelet transform about time-frequency domain to time-fractional frequency domain, can characterize signal features in time and fractional-frequency domain. Based on the theory of multiresolution analysis(MRA) of the fractional wavelet, the new forms about coefficient decomposition and reconstruction of discrete fractional wavelet transform(DFRWT) are given and made two-dimensional expansion. According to the feature of subband coefficient energy of image based on DFRWT varies with different p order, a novel image threshold denoising method based on DFRWT is proposed. The method in conditions of keeping the energy of low frequency subband for absolute great value, appropriate to raise the distribution of energy percentage, more beneficial for image noise suppression. The experimental results show that the performance of this method is better than the traditional wavelet threshold denoising method both in vision effect and peak signal to noise ratio.

Xu M.,Huainan Normal College | Wei Y.-J.,Huainan Normal College | Wang F.-W.,Huainan Normal College
Acta Crystallographica Section E: Structure Reports Online | Year: 2011

In the title compound, [Co(C12H13N2O 3)2], the CoII ion is situated on a twofold rotation axis and is coordinated by two N and two O atoms from two symmetry-related Schiff base 2-(cyclopentyliminomethyl)-4-nitrophenolate ligands (L) in a distorted tetrahedral geometry. The cyclopentyl ring in L is disordered over two conformations in a 0.640 (19):0.360 (19) ratio.

Xu X.,Nanjing University of Aeronautics and Astronautics | Xu X.,Huainan Normal College | Wang Y.,Nanjing University of Aeronautics and Astronautics | Chen S.,Huainan Normal College
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | Year: 2014

In order to suppress the pseudo-Gibbs effect in down-sampling process caused by the image fusion method based on wavelet transform and solve the problem of long fusion time for non-subsampling image fusion method, a new image fusion method based on downsampling fractional wavelet transform (FRWT) is proposed in this paper. The discrete fractional wavelet transform (DFRWT) is utilized to decompose the different gray distribution feature source images. According to the non-sparsity characteristic of the mode coefficients in different p orders of FRWT, the comparison experiments were conducted using the image fusion rules of regional maximum value and regional variance matching, respectively; and the selections of the p order and fusion rule are discussed. The experiment results show that compared with the traditional DWT fusion method, the proposed method can effectively suppress the pseudo-Gibbs effect, and obtain better visual effect and higher value of objective evaluation; compared with the method of non-subsampling transform method, the fusion time is much shorter while the fusion quality is ensured. Experiment results demonstrate that the proposed method is efficient.

Tian D.,Huainan Normal College | Zhao X.,Huainan Normal College
Asian Journal of Chemistry | Year: 2010

The convenient preparation of ordered bimodal mesoporous silica nanoparticles has been achieved by mild-temperature post-synthesis hydrothermal treatment of as-synthesized MCM-48 mesoporous materials in H2O2 solution. X-ray diffraction, TEM, FT-IR, TGA and nitrogen sorption were used to characterize the obtained bimodal mesoporous silica sample. The bimodal mesoporous MCM-48 can be obtained only under H2O2 hydrothermal treatment. Hydrogen peroxide plays an important role in simultaneously removing organic templates and forming ordered bimodal mesopores.

Ruan Y.,Huainan Normal College
Advance Journal of Food Science and Technology | Year: 2015

Food safety is the goal of service-oriented government, which is to achieve one of the main functions. Food safety is not only a political issue related to national security and social stability, but also an economic problem. This study makes the general theories analysis for the food safety to the athletes by describing the various factors affecting food security and builds interpretive structural model to analyze the relationship between various factors. Meanwhile, it is to identify measures to address food safety issues. © Maxwell Scientific Organization, 2015.

Li L.,Huainan Normal College
Journal of Sol-Gel Science and Technology | Year: 2011

Uniform spinel ferrite CoFe2O4 nanoparticles with average diameter of 40 nm were fabricated by a novel glycol-assisted autocombustion method. The as-prepared powders were characterized by X-ray diffraction, transmission electron microscopy and Raman spectrum. The room temperature magnetic property of the nanoparticles was examined, indicating the presence of an ordered magnetic structure in the spinel system. The electrochemical tests show that the as-prepared nanoparticles exhibits excellent electrochemical cycleability. The simple synthetic route can be applied to as a general method for the fabrication of other functional nanomaterials. © 2011 Springer Science+Business Media, LLC.

Zhu C.,HuaiNan Normal College | Wang F.,HuaiNan Normal College
Advanced Materials Research | Year: 2012

A method to prepare nickel oxide material which has a high purity and nano-sized particle was developed. nano NiO was synthesized by sol-gel method using nickel alkoxide as precursors. The structural characterization of the obtained materials was performed by thermal analysis TG-DTA, X-ray diffraction (XRD), Laser Raman spectra and Transmission Electron Microscopy (TEM). The characterization results indicated that NiO nano-particles (size 25-35 nm) are obtained by hydrolyzing of metal alkoxide of Ni(OCH 2CH 2OH) 2 and possess high purity.

Two new hydrazone compounds C14H10I2N 2O3•CH3OH (1) and C19H 16N2O3•2CH3OH (2) are synthesized by the condensation reactions of the equimolar quantities of 4-hydroxybenzohydrazide with 3,5-diiodo-2-hydroxybenzaldehyde and 2-methoxynaphth-1-yl-methylene respectively in methanol solutions. Compound 1 consists of a hydrazone molecule and a methanol molecule of crystallization, and compound 2 consists of a hydrazone molecule and two methanol molecules of crystallization. Both compounds are characterized by elemental analysis, IR spectra, and single crystal X-ray diffraction. As expected, each hydrazone molecule adopts an E configuration about the C=N double bond. In the crystal structures of both compounds, the hydrazone and methanol molecules are linked through intermolecular N-H⋯O and O-H⋯O hydrogen bonds, forming layers along the bc direction. © 2011 Pleiades Publishing, Ltd.

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