Zhanjiang, China
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Wu J.-S.,Zhanjiang Normal College
Rengong Jingti Xuebao/Journal of Synthetic Crystals | Year: 2013

In this paper, from the model of anion coordination polyhedron growth units, a according to the polarity surface structural features of the large dimensions of growth units, magnesium hydroxide whiskers were grown in an artificially controlled environment, and the methods of glycerol and magnesium supersaturation are introduced. The essence of method of polyols that is false incorporate (ie: adsorption) under certain conditions, it make a false incorporate of crystal face with polyols growth rate significantly reduce or even stop growing, while the other crystal faces remain the original rate of growth, it can be achieved manually controlled growth of magnesium hydroxide whisker. Method of supersaturation of magnesium solution is what makes the concentration of growth units [Mg-Ax](x-2)-(A≠OH-) great, and to be more than 4 times larger than the concentration of component [Mg-(OH)x](x-2)-, So to formation of basic magnesium whisker firstly, and then let it react with the appropriate alkali solution to prepare magnesium hydroxide whiskers.


Zheng X.-L.,Zhejiang GongShang University | Yu B.-S.,Zhanjiang Normal College | Yu B.-S.,Technology in Universities of Guangdong | Li K.-X.,Zhanjiang Normal College | Dai Y.-N.,Zhanjiang Normal College
Food Control | Year: 2012

A HPLC method using a NH2 column for determination of melamine was reported, with acetonitrile-H3PO4 (15 mmol L-1, pH = 6.5) (V/V = 88:12) as mobile phase and UV detection at 215 nm. The tested parameters included mobile phase composition, percentage of organic solvent, and buffer concentration, and pH value and UV detection wavelength. Good linearity was observed within the concentration range of 0.005-32 mg L-1 (n = 7, r = 0.9997), the detection limit was 0.003 mg L-1 (S/N = 3). The chromatography mode was considered to be hydrophilic interaction chromatography (HILIC). The method was successfully applied to determine melamine in several dairy products, with acetonitrile as extract solvent of melamine and also as protein precipitant. The spike recovery of melamine was within 73-96%. © 2011 Elsevier Ltd.


Hong W.-M.,Zhanjiang Normal College
Procedia Engineering | Year: 2011

In order to cope with the challenges leaded by different protocols and varied port numbers, this paper comes up with an improvement approach for precise P2P (Peer-to-Peer) traffic identification which mainly focus on UDP (User Datagram Protocol) traffic produced by P2P software. Three significant features of UDP traffic with respect to transport layer behaviors and packet size distribution are revealed, including unique local port number, unique UDP protocol pair and two-point distribution of packet size. Experiments demonstrate that the identification accuracy of this approach is as high as 98.8% on average. © 2011 Published by Elsevier Ltd.


Wang E.,Zhanjiang Normal College
Materials Science Forum | Year: 2011

YVO4:Eu3+ phosphors were prepared by microwave hydrothermal method in this work. YVO4:Eu3+ phosphors were probed by photoluminescence (PL), X-ray powder diffraction (XRD) and scanning electron microscope (SEM). The effects of different preparation conditions on the photoluminescence, the structure and the morphology of YVO 4:Eu3+ phosphors were studied. The experiment results show that the pH value and the Eu3+ doping amount have some important effect on the photoluminescence and the morphology of YVO4:Eu 3+phosphors. © (2011) Trans Tech Publications.


Wang E.,Zhanjiang Normal College
Materials Science Forum | Year: 2011

Eu3+-doped La2Mo2O9 phosphor was fabricated by sold-state reaction method. The as-prepared samples were characterized by the application of X-ray diffraction (XRD), scanning electron microscopy (SEM), and emission spectra. The effect of the sintering temperature and doping amount of europium ion on the luminescent properties of La 2Mo2O9:Eu3+ was investigated. The results show that the luminescent intensity will reach the strongest when the sintering temperature is equal to 1073 K. The Eu3+ doping amounts also have obvious effect on the luminescent properties. © (2011) Trans Tech Publications.


Peng Y.H.,Zhanjiang Normal College | Lin H.D.,Zhanjiang Normal College
Advanced Materials Research | Year: 2014

An environment-friendly plasticizer, epoxidized corn oil was prepared by the epoxidation of corn oil with peroxyacetic acid which was generated in situ from hydrogen peroxide and glacial acetic using acidic ion exchange resin modified by zinc chloride as catalyst. The product with an epoxy oxygen content of 6.40 w% and a percent conversion to oxirane of 87.67 % was obtained under the following optimized conditions: 15 % modified ion exchange resin feed relative to the weight of corn oil, the molar ratio of 1.7 to 1 with hydrogen peroxide to double bonds, 18% acetic acid feed relative to the weight of corn oil, the reaction time of 5.5 h, the temperature of 75 °C and stirring speed of 600 rpm. © (2014) Trans Tech Publications, Switzerland.


Xue S.,Zhanjiang Normal College
Ceramics International | Year: 2013

Ar-ion-implantation to a dose of 1×1017 ions/cm 2 was performed on cubic ZnS thin films with (111) preferred orientation deposited on fused silica glass substrates by vacuum evaporation. After ion implantation, ZnS films were annealed in flowing argon at different temperatures from 400 to 800 °C. The effects of ion implantation and post-thermal annealing on the structural and optical properties of ZnS films were investigated by X-ray diffraction (XRD), photoluminescence (PL) and optical transmittance measurements. XRD reveals that the diffraction peaks recover at ∼500 °C. The optical transmittances show that the bandgap of ZnS films blueshifts when annealed below 500 °C, and redshifts when annealed above 500 °C. PL results show that the intrinsic defect related emissions decrease with increasing annealing temperature from 400 to 500 °C, and increase with increasing annealing temperature from 500 to 800 °C. The observed PL emissions at 414 and 439 nm are attributed to the transitions of Zn i→VZn and VS→VBM, respectively. © 2013 Elsevier Ltd and Techna Group S.r.l.


Xue S.,Zhanjiang Normal College
Physica Scripta | Year: 2013

Cubic zinc sulfide (ZnS) thin films with the (111) preferred orientation were prepared by sulfurization of radio frequency sputtered ZnO:Al films. The Al-doped ZnS films were annealed in argon to improve the film crystallinity and activate the dopant atoms. The surface morphology, and structural, optical and electrical properties were characterized by scanning electron microscopy, x-ray diffraction, optical transmittance and electrical measurements before and after the ZnO:Al samples were sulfurized and annealed. The results show that the hexagonal ZnO:Al films completely transform into cubic ZnS after being sulfurized in H2S at 550°C for 2 h. The crystallinity of the ZnS films is improved and the dopant atoms are electrically activated by the thermal annealing at higher temperatures. The resistivity of the ZnS films reaches as low as ∼0.4 Ω cm. This suggests the potential applications of ZnS in certain optoelectronic devices. © 2013 The Royal Swedish Academy of Sciences.


Lu W.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Lu W.,Zhanjiang Normal College | Wang C.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Yue W.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Chen L.,CAS Suzhou Institute of Nano Technology and Nano Bionics
Nanoscale | Year: 2011

A solution filling and drying method has been demonstrated to fabricate Si/PEDOT:PSS core/shell nanowire arrays for hybrid solar cells. The hybrid core/shell nanowire arrays show excellent broadband anti-reflection, and resulting hybrid solar cells absorb about 88% of AM 1.5G photons in the 300-1100 nm range. The power conversion efficiency (PCE) of the hybrid solar cell reaches 6.35%, and is primarily limited by direct and indirect interfacial recombination of charge carriers. © The Royal Society of Chemistry 2011.


Hong W.-M.,Zhanjiang Normal College
Procedia Engineering | Year: 2012

With the rapid development of network, the demanding of network security are increasingly, but the traditional network security mechanism for network attack is passive defense, which gradually become ambition in the face of various protean intrusion. Therefore, this paper suggests adopting active dynamic defense of network security strategy, change the passive safety status quo, solve the imbalance between attack and defensive, at the same time improve the network security. © 2011 Published by Elsevier Ltd.

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