Zhenjiang, China
Zhenjiang, China

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Tang H.,Jiangsu University | Zhang D.,Jiangsu University | Tang G.,Jiangsu University | Tang G.,Zhenjiang College | And 5 more authors.
Journal of Alloys and Compounds | Year: 2014

Facile one-step synthetic method for the fabrication of uniform mesoporous TiO2 nanospheres was reported on the basis of template-directed deposition and in situ template-sacrificial dissolution, in which SiO 2 nanospheres was employed as the template and (NH4) 2TiF6 was used as the precursor. The deposition of TiO2 nanoparticles on the surface of template is accompanied with the dissolution of SiO2 spherical cores by HF generated during the hydrolysis of (NH4)2TiF6 in the reaction. The obtained products were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), N2 adsorption-desorption analysis, and UV-visible diffuse reflectance spectroscopy. Furthermore, the photocatalytic activity of samples was evaluated by photocatalytic decolorization of three typical dyes (methyl orange, methylene blue, and rhodamine B) at ambient temperature under UV illumination. The results indicate mesoporous TiO2 nanospheres exhibited good photocatalytic activity for the degradation of different dyes. These monodisperse mesoporous TiO2 nanospheres should find various potential applications in photocatalysis, catalysis, solar cell, separation and purification processes. © 2014 Published by Elsevier B.V. All rights reserved.


Shan G.J.,Jiangsu University of Science and Technology | Shan G.J.,Zhenjiang College
Applied Mechanics and Materials | Year: 2014

Privacy preserving plays an important role in application of the Internet of Things (IoT). As apart of the IT, Wireless Sensor Networks (WSNs) should provide the privacy preserving in data aggregation. This paper presents a novel energy-saving private-preserving aggregation scheme (ESPART) for Wireless Sensor Networks, which uses characteristic of the data aggregation tree structure to reduce communication overhead. It assigns the random time pieces to nodes with aim to avoid collision, and limits the scope of collusion data to reinforce data—loss resilience. Compared with the SMART algorithm have less communication overhead. ESPART uses data-dependent fusion characteristics of the tree structure to eliminate SMART algorithm for unnecessary communication node, so that in case of the same privacy protection security, the data transmission amount is reduced to about 48% of SMART. © (2014) Trans Tech Publications, Switzerland.


Tang G.,Jiangsu University | Tang G.,Zhenjiang College | Tang H.,Jiangsu University | Li C.,Jiangsu University | And 2 more authors.
Materials Letters | Year: 2011

WS2 nanorods with diameters of about 20-100 nm and lengths of about 0.1-2 μm were successfully synthesized by a simple hydrothermal method with the help of the surfactant Cetyltrimethylammonium Bromide (CTAB). As-prepared WS2 samples are characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Moreover, the influence of surfactant CTAB on the formation of WS2 nanorods was investigated. A possible three-step growth mechanism of WS2 nanorods, in which initial nucleation, self-assembly (oriented aggregation), and subsequent crystal growth (Ostwald ripening) is involved, is proposed to explain the formation of WS2 nanorods on the basis of observations of a time-dependent morphology evolution process. © 2011 Elsevier B.V. All rights reserved.


Tang G.,Jiangsu University | Tang G.,Zhenjiang College | Wang Y.,Jiangsu University | Chen W.,Jiangsu University | And 2 more authors.
Materials Letters | Year: 2013

In this paper, flowerlike MoS2 hollow microspheres were synthesized by a facile hydrothermal solution route with the assistance of Pluronic F-127. The as-prepared products were characterized by X-ray powder diffraction (XRD), energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The experimental results indicated reaction time and surfactant have significant effects on the morphology of the as-prepared products. A possible formation mechanism has also been investigated on the basis of a series of transmission electron microscopy (TEM) studies of the product obtained at different durations. This well-controlled synthesis approach may be extended to fabricate complex hollow structures of other transition metal sulfide materials. © 2013 Elsevier B.V. All rights reserved.


Tang H.,Zhenjiang College | Zhao W.,Jiangsu University
2015 18th International Conference on Electrical Machines and Systems, ICEMS 2015 | Year: 2015

Due to its high effiency and high power density, the permanent magnet synchronous motor (PMSM) widely is used in servo drive systems. However, the PMSM position loop is vulnerable to be affected by the uncertainties of motor parameter variations and load disturbances. This paper proposes a new deadbeat control strategy for PMSM, in which a sliding active disturbance rejection controller is adopted. When the moment of inertia and the load is used as a disturbance and the rotor angle is used as state variables, sliding mode extended state observer can be developed, which provides a high frequency channel for the high frequency component. It reduces the chattering effect and compensates the system losses due to disturbance. So, the proposed control system has strong robustness to the internal disturbance, external disturbance and parameter variation. Also, the deadbeat voltage control law is obtained. Simulated results are given for verification. © 2015 IEEE.


Tian P.,Zhejiang University | Tian P.,Zhenjiang College | Chen Z.-W.,Zhejiang University
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2013

The specimen is assumed to be rigid payload in traditional earthquake simulation test control. To overcome the poor control precision of this kind of control, an earthquake simulation control strategy was proposed. In the control strategy, servo-control parameters were set reasonably by analyzing physical modes of elastic payload, so the transfer function of the shaking table can keep approximately unvaried under a variety of different loads. On this basis, the system identification method of vibration control was optimized. The shaking table system can achieve high simulation precision for seismic wave without pre-test step. The experimental results on the Zhejiang University shaking table indicate that with the control strategy, the first frame correlation coefficient between reference signal and control signal in time domain can be above 85% without pre-test step in the case of parameter optimization; and after several frames of earthquake simulation test, the correlation coefficient can reach 90% through identifying the transfer function continuously.


Wang Y.,Jiangsu University | Qiu F.,Jiangsu University | Xu B.,Zhenjiang College | Xu J.,Zhenjiang College | And 3 more authors.
Progress in Organic Coatings | Year: 2013

A series of waterborne fluorinated polyurethane-acrylate (WFPUA) materials were prepared from polyester polyol (NJ-330), isophorone diisocyanate (IPDI), dimethylol propionic acid (DMPA) and different content of hexafluorobutyl acrylate (FA). The chemical structure was characterized with FT-IR, 1H and 13C NMR; and the result confirmed that the FA monomer had been introduced into the chain of the WPUA polymer. The physical properties of WFPUA dispersions, mechanical properties and thermal properties of WFPUA films were measured. When the content of FA monomer was 3.0 wt.%, the film exhibited the highest tensile strength, hardness and excellent chemical resistance. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used for characterization of cross and surface sections of the WFPUA films to verify the results. The obtained WFPUA materials have great potential application such as coatings, leather finishing, adhesives, sealants, plastic coatings and wood finishes. © 2013 Elsevier B.V.


Liu B.,Zhenjiang College
Zhuzao/Foundry | Year: 2015

Comparing with former national standard, GB/T 5613-2014 designation for cast steels and GB/T 14408-2014 low alloy steel castings for general engineering and structural purposes have many changes. In the paper according to these new national standards, main changes were introduced, analyzed and compared with old national standards. Through the paper user can comprehend deep and use these new standards in actual producing, teaching and research. ©, 2015, Chinese Mechanical Engineering Society. All right reserved.


Tang G.,Jiangsu University | Tang G.,Zhenjiang College | Sun J.,Jiangsu University | Wei C.,Jiangsu University | And 5 more authors.
Materials Letters | Year: 2012

MoS 2 nanoflowers were successfully synthesized by a simple hydrothermal process with the help of a surfactant. The products were characterized by X-ray powder diffraction (XRD), energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). X-ray diffraction results showed that the as-prepared product was the hexagonal phase of MoS 2 without any impurity. TEM and SEM images showed that the MoS 2 nanoflowers had uniform sizes with diameter of about 12 μm and were constructed with many irregular nanosheets as a petal-like structure with thickness of several nanometers. A possible formation mechanism of the MoS 2 nanoflowers was preliminarily proposed on the basis of observations of a time-dependent morphology evolution process. © 2012 Elsevier B.V.


Tang H.,Jiangsu University | Zhang D.,Jiangsu University | Tang G.,Jiangsu University | Tang G.,Zhenjiang College | And 4 more authors.
Ceramics International | Year: 2013

Novel α-Fe2O3/TiO2 composite hollow spheres were successfully synthesized by a template-assisted precipitation reaction using urea as a precipitating agent and carbon spheres as templates in a mixed solvent of water and ethanol, and then calcined at 400 C for 4 h. The as-prepared samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, nitrogen adsorption-desorption isotherms, and vibrating sample magnetometer. The influence of calcination temperature and the molar ratio of titanium to iron (R) on the photocatalytic activity of the samples was investigated. The results indicated that the composite spheres show magnetic characteristics at room temperature and good photocatalytic activity under visible-light irradiation compare to the single-component α-Fe2O3 particles. This method can be further applied to synthesize nanocomposites of magnetic metal oxide and other metal oxide. © 2013 Elsevier Ltd and Techna Group S.r.l.

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