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Yang Z.,Zhenjiang College | Dong Y.-M.,Suzhou University of Science and Technology | Dong Y.-M.,Jiangsu Key Laboratory for Environment Functional Materials
Xiandai Huagong/Modern Chemical Industry | Year: 2014

TiO2-coated fly ash catalyst (TiO2/FA photocatalyst) is prepared by sol-gel method and characterized by XRD and SEM. The degradation of landfill leachate by combination of ultrasound and light is carried out. The effects of catalyst type and dosage, pH and reusing times of TiO2/FA catalysts on degradation ratios are performed. The results show that the calcination temperature has the influence on crystal phase. The average particle size of TiO2 is 11.12 nm and anatase phase is about 80% when calcination temperature is 550°C. The TiO2/FA catalysts are very effective for the degradation of landfill leachate under the light and ultrasonic wave. About 73.3% of landfill leachate can be degraded after 100 minutes when catalyst dosage is 2 g/L and pH is 10. The TiO2/FA catalyst can be recovered by filtration and regain the photocatalytic activity by calcination. The degradation ratio is still about 68.4% even if the catalyst is reused for 5 times. Source


Wang Y.-H.,Suzhou University of Science and Technology | Yang J.,Suzhou University of Science and Technology | Zhong Q.,Suzhou University of Science and Technology | Song R.-F.,Suzhou University of Science and Technology | Song R.-F.,Jiangsu Key Laboratory for Environment Functional Materials
Synthesis and Reactivity in Inorganic, Metal-Organic and Nano-Metal Chemistry | Year: 2014

A new two-dimensional lead(II) coordination polymer, {[Pb3(qoa)2I4]n (1), (qoa- = 8-quinolyloxyacetate)}, was synthesized by hydrothermal method. The structure of 1 may be considered as a two-dimensional coordination polymer based on rectangular hexanuclear lead(II) units. The hexanuclear PbII units are connected to form one-dimensional chain structure by carboxyl monodentate oxygen bridges, and the one-dimensional chains are further linked by -I connectors to generate the two-dimensional coordination polymer. Optical diffuse-reflection spectra results suggest complex 1 has the property of the semiconductor. Complex 1 shows phosphorescence with the emission at 614 nm and 670 nm upon excitation at 350 nm. Copyright © Taylor & Francis Group, LLC. Source


Li J.,Suzhou University of Science and Technology | Dong Y.,Jiangsu Key Laboratory for Environment Functional Materials | Zhu G.,Suzhou University of Science and Technology | Sun C.,Suzhou University of Science and Technology
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2016

To improve the photoelectric properties of polypyrrole (PPy), the PPy/CdS nanocomposites were synthesized by interfacial polymerization-in-situ method. The products were characterized by Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM-EDAX) and thermogravimetric analysis (TGA). The PPy/CdS film as prepared has a smooth surface. Effect of the charge ratio of CdS on the scales of CdS nanorods was studied. The ultraviolet absorption (UV-Vis) and Z-scan technique were introduced to study the fluorescence and nonlinear optical (NLO) properties of PPy/CdS. The PPy/CdS has obvious saturated absorption and nonlinear refraction. The nonlinear refractive coefficient of PPy/CdS (10:1) thin film is 2.4 times of PPy film. Similarly, the third-order nonlinear polarizability of PPy/CdS (10:1) is 2.1 times of PPy. The composite material shows a potential application in the field of optical limiting materials and other photoelectric field. © 2016, Chengdu University of Science and Technology. All right reserved. Source


Chen B.,Suzhou University of Science and Technology | Zhao D.,Suzhou University of Science and Technology | Dong Y.,Suzhou University of Science and Technology | Dong Y.,Jiangsu Key Laboratory for Environment Functional Materials | And 4 more authors.
Chinese Journal of Environmental Engineering | Year: 2014

To protect the environment and use the acid residue (AR) from kitchen waste regeneration, the AR was analyzed by infrared spectrum (FTIR) firstly. Then, the AR was used as char forming agent in the ammonium phosphate/melamine/pentaerythritol (APP/MEL/PER) intumescent flame retardant (IFR) system. The flame-resistant performance of the synergistic flame retarding epoxy resin (EP) (AR/IFR/EP) was tested by means of limited oxygen index (LOI) and vertical combustion method. The flame-resistant mechanism was also discussed based on analysis of the residue. Results indicated that, the LOI value of IFR/AR/EP (IFR+AR: 25 wt%; AR: 2~6 wt%) reached 30%, indicating a good flame-resistant performance and lower cost. These results play a positive role in promoting the energy regeneration of kitchen waste. Source


Dong Y.,Suzhou University of Science and Technology | Dong Y.,Jiangsu Key Laboratory for Environment Functional Materials | Zhao D.,Suzhou University of Science and Technology | Pang W.,Suzhou University of Science and Technology | And 2 more authors.
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2013

The nitrogen, phosphorus and zinc compounds in the water were adsorbed by the waste residue (WR) from the magnesium-based wet flue gas desulfurization process. Then, the zinc ammonium phosphate (ZAP) was synthesized in situ, and the modified WR (MWR) was obtained. MWR were characterized by XRD, FT-IR, SEM and TG. The results certify the formation of WR/nano-ZAP composites with the average grain diameter of ZAP about 8.16 nm. The polypropylene (PP)/MWR flame retarding materials were tested by oxygen index (OI) and universal mechanical tester to study the fire resistance and mechanical properties of PP/MWR. The limit oxygen index (LOI) of PP/MWR (25 phr) is about 27.1%, and the flame resistance of PP/MWR reaches UL-94 V-0 level. The tensile strength of PP/MWR is about 6.95% higher than that of PP after 20 phr MWR added. MWR shows a good application prospect in the fields of waste water treatment and flame retarding materials. Source

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