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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.


Dong Y.,Suzhou University of Science and Technology | Dong Y.,Jiangsu Key Laboratory for Environment Functional Materials | Dong Y.,University of Texas at Austin | Zhu Y.,Suzhou University of Science and Technology | And 5 more authors.
Journal of Thermal Analysis and Calorimetry | Year: 2015

To improve the flame retardancy and mechanical properties of epoxy (EP), a novel intercalated layered double hydroxides (ILDHs) were synthesized by a solution intercalation method using ammonium alcohol polyvinyl phosphate as intercalator. The ILDHs were examined by X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), energy-dispersive spectrometry and scanning electron microscopy (SEM). The conditions for synthesis of ILDHs have been optimized. Thermogravimetric analysis indicated a good char-forming property of ILDHs. The flame retardancy of epoxy was improved by adding ILDHs. The EP composites containing 30-40 mass% ILDHs passed UL-94V-0 rating. Tensile strength was also enhanced by adding 30-40 mass% ILDHs, which was attributed to the involvement of physical cross-linking network among layered particles and polymer chains. The morphology and structures of residues generated during LOI test were investigated by SEM and FTIR to support a fundamental analysis for the mechanism of char formation. SEM observations of residues of the ILDHs/EP confirmed the formation of an incompact charred layer during combustion, which could inhibit the transmission of heat and mass during combustion. It may be inferred that ILDHs acted as a catalyst for esterification, dehydration and compact char formation of EP system. © 2015 Akadémiai Kiadó, Budapest, Hungary.


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.


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 | Wang J.,Suzhou University of Science and Technology
Chinese Journal of Environmental Engineering | Year: 2016

Pickling and phosphating wastewater and landfill leachate were treated by magnesium-based flue gas desulfurization residue (MFGDR), MgSO4 wastewater, and high-calcium fly ash (HCFA), based on the study of the nitrogen and phosphorus removal from model wastewater by HCFA. The concentrations of NH3-N and PO4 3-P were 1135 mg·L-1 and 2766 mg·L-1, respectively, and the removal rates were 98% and 99%, respectively, facilitated by the processes of nitrogen-to-phosphorus ratio adjustment, adsorption, magnesium ammonium phosphate (MAP) chemical precipitation, and solid-liquid separation. Finally, the pollutants were adsorbed and converted to MAP and other solids. Therefore, the wastewater achieved the discharge standard. By this method, the thermoelectric solid waste, magnesium sulfate wastewater, acid pickling and phosphating wastewater, and landfill leachate were treated well simultaneously. Meanwhile, the reagent cost of wastewater treatment was reduced. Therefore, this technology has good potential in the field of wastewater treatment. © 2016, Science Press. All right reserved.


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.


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.


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.


Wang Y.-H.,Suzhou University of Science and Technology | Wang Y.-H.,Jiangsu Key Laboratory for Environment Functional Materials | Song R.-F.,Suzhou University of Science and Technology | Xu X.-W.,Suzhou University of Science and Technology
Chinese Journal of Inorganic Chemistry | Year: 2014

The new one-dimensional Pb(II) coordination polymer [Pb(QOA)2]n (QOA=8-quinolinyloxyacetate anion) was synthesized by hydrothermal method; and its structure is characterized by IR; elemental analysis and single crystal X-ray diffraction analysis. The crystal belongs to monoclinic system and space group C2/c with unit cell parameters a=2.113 2(2) nm; b = 1.189 86(7) nm; c=0.790 73(2) nm; β=99.081(3)°; V=1.963 3(4) nm3; Z=4. Solid UV-Vis-NIR diffuse reflectance spectra results suggest the complex has the potential semiconductor property. The solid fluorescence spectra results exhibit the complex has good fluorescence property. CCDC: 939269. © 2014, Chinese Chemical Society. All rights reserved.


Wang L.,Suzhou University of Science and Technology | Zhang Q.,Suzhou University of Science and Technology | Wang D.,Suzhou University of Science and Technology | Wang D.,Jiangsu Key Laboratory for Environment Functional Materials | Wei J.,Suzhou University of Science and Technology
Chinese Journal of Environmental Engineering | Year: 2016

For the electrochemical degradation of biorefractory organics, novel polyethylene glycol (PEG)-doped Ti/Sb-SnO2/PEG-PbO2 electrodes were prepared and characterized by linear sweep voltammetry (LSV), scanning electron microscopy (SEM), X-ray diffraction (XRD), chronoamperometric experiments, and accelerated lifetime tests. It was shown that the PEG-doped PbO2 electrode exhibited high electrocatalytic activity and good stability with the optimal PEG doping concentration of 9 g/L. The oxygen evolution potential of the prepared electrode reached 2.48 V, and its lifetime was 114 h, which was 3.35 times longer than that of the unmodified one. The electrochemical degradation performance of the prepared electrodes was investigated using o-cresol as a model. The percentage of o-cresol removal decreased with increasing initial o-cresol concentration. The removal efficiency of o-cresol reached 100% under the conditions of initial o-cresol concentration of 100 mg/L, pH of 10.0, and current density of 10 mA/cm2 for 1.5 h. The cyclic voltammetric (CV) test showed that the degradation of o-cresol on Ti/Sb-SnO2/PEG-PbO2 was achieved via electrochemical oxidation mediated by ·OH, and kinetic analyses indicated that the degradation of o-cresol followed first-order reaction kinetics. © 2016, Science Press. All right reserved.


Wang Y.-H.,Suzhou University of Science and Technology | Wang Y.-H.,Jiangsu Key Laboratory for Environment Functional Materials | Song R.-F.,Suzhou University of Science and Technology | Jiang F.,Suzhou University of Science and Technology
Acta Crystallographica Section C: Crystal Structure Communications | Year: 2013

A novel Cu-Na heteronuclear three-dimensional coordination polymer, poly[diaquadi-μ5-iminodiacetato-di-μ4-iminodiacetato- tricopper(II)disodium(I)], [Cu3Na2 (C4H 5NO4)4 (H2O)2] n , has been prepared by hydrothermal synthesis. The asymmetric unit contains one and a half copper(II) cations, a sodium cation, two iminodiacetate (ida) ligands and a coordinated water ligand. One of the two independent Cu II centres is in a general position and is five-coordinated in a distorted square-pyramidal geometry. A [Cu(ida)] unit is formed via a bis-chelating ida ligand and the coordination sphere of the CuII atom is completed by two O atoms of two different neighbouring [Cu(ida)2] units. These [Cu(ida)2] units are associated with the second Cu II cation, which is located on a crystallographic inversion centre and is coordinated in a distorted square-planar geometry by two chelating ida ligands. The carboxylate groups of the ida ligands act as bridges and connect the [Cu(ida)] and [Cu(ida)2] building blocks in a 2:1 ratio, forming two-dimensional arrays. These layers are interconnected into a three-dimensional structure by the sodium ions. Each NaI cation is coordinated by six O atoms from five ida ligands and a water molecule. When [Cu(ida)], the Na I cations and [Cu(ida)2] are viewed as 5-, 5- and 8-connected nodes, respectively, the three-dimensional network exhibits a (32.43.52.63)2(3 2.43.52.63)2(3 4.616.78) topology. © 2013 International Union of Crystallography.

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