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Li Z.,Changzhou University | Li Z.,The Tech Stuff | Fang Y.,Changzhou University | Zhan X.,Wuxi Institute of Technology | Xu S.,Changzhou University
Journal of Alloys and Compounds | Year: 2013

A squarylium dye, 1,3-bis[(3,3-dimethylindolin-2-ylidene)methyl]squaraine (ISQ) sensitized TiO2 nanoparticles photocatalysts with different mass ratio of ISQ to TiO2 were facilely prepared by blending ISQ and TiO2 in ethanol solution. The resulting composite photocatalysts were characterized by the X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectra (FT-IR) and UV-vis diffuse reflectance spectroscope (DRS). The visible light photocatalytic activities of ISQ sensitized TiO2 nanoparticles were evaluated using the degradation of methylene blue (MB) as a photodegradation target. The results showed that photo-response of the ISQ sensitized TiO2 nanoparticles were remarkably extended to visible-light region, and the ISQ dye sensitized TiO 2 exhibited significantly enhanced photocatalytic activity under visible light irradiation. The maximum photocatalytic activity of the ISQ sensitized TiO2 was found at a composite photocatalyst (mass ratio of ISQ to TiO2 was 1:3), and its degradation efficiency of MB reached approximately 98% in 2 h under visible light irradiation. Furthermore, a possible mechanism for the photocatalytic oxidative degradation was also proposed.© 2013 Elsevier B.V. All rights reserved.


Liu B.,Changzhou University | Li Z.,Changzhou University | Li Z.,The Tech Stuff | Li Z.,Jilin Institute of Chemical Technology | And 3 more authors.
Journal of Alloys and Compounds | Year: 2014

The Ag3PO4/MWCNT nanocomposites were facilely fabricated via in situ precipitation method by adding (NH4) 2HPO4 into the mixture of multi-walled carbon nanotube (MWCNT) and AgNO3 solution under stirring. The as-prepared Ag 3PO4/MWCNT nanocomposites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Raman spectroscopy, field emission scanning electron microscopy (FE-SEM), the Brunauer-Emmett-Teller surface area (BET) and UV-vis diffuse reflectance spectroscopy. The TEM results showed that the Ag3PO4 nanoparticles were distributed on the surface of MWCNT uniformly with an average diameter of 70 nm, indicating excellent loading result. The photocatalytic activities of Ag3PO 4/MWCNT nanocomposites were investigated by degrading methylene blue (MB) and malachite green (MG) under visible-light irradiation. It was found that the Ag3PO4/MWCNT nanocomposite exhibited excellent photocatalytic performance with enhanced photocatalytic efficiency and good photostability compared with bare Ag3PO4. Furthermore, a possible mechanism for the photocatalytic oxidative degradation was also discussed. © 2014 Elsevier B.V. All rights reserved.


Fang Y.,Changzhou University | Li Z.,Changzhou University | Li Z.,The Tech Stuff | Li Z.,Jilin Institute of Chemical Technology | And 3 more authors.
Journal of Alloys and Compounds | Year: 2013

Spherical ZnO and flower-like ZnO were prepared by facile hydrothermal method at 180°C and 160°C, respectively. The as-prepared samples were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy and UV-vis diffuse reflectance spectroscopy (DRS) spectra. The optical properties of as-prepared sample, such as photoluminescence (PL) spectra and Raman spectra were studied. The photocatalytic activities of the as-prepared ZnO particles were investigated by degrading the methyl orange (MO) under UV light irradiation. The photocatalytic studies showed that the organic pollutants have been almost completely degraded and mineralized after irradiation of the UV light. These results indicated that the as-prepared ZnO particles exhibited good optical properties and high photocatalytic activities. © 2013 Elsevier B.V. All rights reserved.


Liu X.,Tianjin Polytechnic University | Zhang X.,Tianjin Polytechnic University | Chen Z.,The Tech Stuff | Tan X.,Tianjin Polytechnic University
Ceramics International | Year: 2013

Pure zeolite Rho has been synthesized by the hydrothermal method using CsOH and 18-crown-6 ether as the template agent and methylcellulose (MC) as the space-confinement additive. XRD, SEM, FT-IR and TGA-DTA techniques were applied to characterize the obtained zeolite Rho powders. The results indicate that the addition of MC is able to promote the overall crystallization rate of zeolite Rho and simultaneously to control the particles to a size smaller than 1 μm and a uniform size distribution. However, a higher calcination temperature, i.e. around 600 °C is also required to remove the water and organic species occluded in the zeolite precursor. © 2012 Elsevier Ltd and Techna Group S.r.l.


Li Z.,Changzhou University | Li Z.,The Tech Stuff | Fang Y.,Changzhou University | Xu S.,Changzhou University
Materials Letters | Year: 2013

A novel 1,3-bis(N-3H-3,3-dimethyl-2-methylene indolenine) squaraine dye (ISQ) sensitized TiO2 nanocomposites (ISQ/TiO2) were facilely prepared by mixing the solution of ISQ and TiO2 nanoparticle suspension in ethanol. The crystal structure, morphology and UV-vis diffuse reflectance spectroscopy of ISQ/TiO2 nanocomposites were analyzed. The XRD results showed that the synthesized ISQ/TiO2 nanocomposites were mixture of anatase and rutile crystals. The photocatalytic activity of ISQ/TiO2 nanocomposites was investigated by degrading methylene blue (MB) under visible-light irradiation (λ>400 nm). The photo-response of the ISQ/TiO2 nanocomposites was remarkably extended to visible-light region, and the photocatalytic activity of the ISQ/TiO2 nanocomposites was significantly enhanced. The photodegradation rate of MB for the ISQ/TiO2 nanocomposites reached approximately 98% after 2 h of visible-light irradiation. Furthermore, ISQ/TiO2 nanocomposites showed excellent photocatalytic stability after 5 successive cycles under visible-light. © 2012 Elsevier B.V. All rights reserved.


Liu B.,Changzhou University | Fang Y.,Changzhou University | Li Z.,Changzhou University | Li Z.,The Tech Stuff | Xu S.,Changzhou University
Journal of Nanoscience and Nanotechnology | Year: 2015

This paper reviews the recent research and development of novel visible-light induced photocatalysts with nanostructures. In recent years, Ag3PO4-based and BiVO4-based nanomaterials have drawn wide attention due to their narrow band gap and excellent photocatalytic performance. The development of the new material covers the synthesis condition, unique morphology, further modification which focused on the Ag3PO4 and BiVO4, respectively. Meanwhile, titanium dioxide has already become one of the classical photocatalyst. However, the band gap of TiO2 (3.2 eV) limits its efficient utilization of solar energy, two categories novel modification methods of TiO2 are proposed to make them active under visible light illumination. Using polymers and dye to modify TiO2 is a wonderful approach to achieve excellent electronic and optical properties mainly in aspect of photocatalytic application. Therefore, the paper summarizes novel nanosized photocatalysts with visible-light response including Ag3PO4-based, BiVO4-based and TiO2-based materials, and suggests the further research prospect for the visible-light induced photocatalysts. Copyright © 2015 American Scientific Publishers All rights reserved.


Zhao X.,Donghua University | Wang C.,Donghua University | Xu W.,The Tech Stuff | Zhu M.,The Tech Stuff
Fibers and Polymers | Year: 2013

Photoluminescence electrospun fibers were prepared from poly(aryl ether)s solutions. The porosity and wrinkle fibers could be observed by scanning electron microscopy (SEM). The effect of solution properties on fiber surface morphologies was studied. Meanwhile, the rough fiber surfaces could make the electrospun membranes possess water repellency. The contact angles of electrospun membranes for water were around 140°. The emission spectra of these membranes indicated that the fibers exhibited multi-color including sapphire blue, olive green and rose red. It could provide a proposal for improving flexible optoelectronic devices based on electrospun membranes of conjugated polymers. © 2013 The Korean Fiber Society and Springer Science+Business Media Dordrecht.


Liu Y.,Nanjing University of Aeronautics and Astronautics | Liu Z.-L.,Nanjing University of Aeronautics and Astronautics | Liu X.-Q.,Nanjing University of Aeronautics and Astronautics | Chen H.-J.,Nanjing University of Aeronautics and Astronautics | Li J.,The Tech Stuff
Cailiao Gongcheng/Journal of Materials Engineering | Year: 2016

The microstructure and corrosion properties of AM60-2%RE magnesium alloys with the addition of trace Zn were investigated by X-ray diffractometer (XRD), scanning electron microscope (SEM), polarization curve and electrochemical impedance spectroscopy. The results show that the Zn element added is mainly solution distributed in the matrix, without forming new intermediate phase with the other elements; while, the amount of phase Al11RE3 increases obviously, and is distributed intermittently on the grain boundary. With the increase of Zn content, the corrosion current density of the alloys is reduced, the charge transfer resistance increases and the compactness of corrosion products is improved, leading to obviously improved corrosion resistance. The corrosion rate is 0.405mg·cm-2·d-1 for the alloy with 0.8% Zn addition, which is lowered to 36% that of the alloy with 0.2% Zn addition. © 2016, Beijing Institute of Aeronautical Materials (BIAM). All right reserved.


Liu Z.,Nanjing University of Aeronautics and Astronautics | Zhou G.,Nanjing University of Aeronautics and Astronautics | Liu X.,Nanjing University of Aeronautics and Astronautics | Li J.,The Tech Stuff
Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | Year: 2011

The effects of Sb contents on the microstructure and corrosion behavior in NaCl solution of as-cast AM50-Y alloy were studied. The results show that with the addition of Sb, YSb phase forms preferentially. As Sb contents increase, the size and amount of the polygonal Al2Y reduce, while the amount of YSb phase increases, which aggregates and increases in size when Sb content is up to 1%. The corrosion rate and corrosion current of the alloys are improved, whereas the oxide film resistance and electric double layer capacitance are reduced with the increase of Sb. The alloy with 1% Sb has the worst corrosion resistance, and the corrosion rate is up to 2.65 mg·cm-2 ·d-1, which is increased by nearly 2 times compared with the alloy without Sb addition. © Copyright.


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