Advanced Materials Research Vols. 955-959

Abstract: Gold catalysts supported on Na-MMT and Al-PILM noted as Au/Na-MMT and Au/Al-PILM respectively were prepared using Au(en)2Cl3 as precursor, and the catalytic oxidation activity for CO oxidation was investigated. The influence of different carriers on the conversion of CO was discussed. The phase of catalysts, the actual gold loading and the morphology of gold nanoparticles were characterized by X-ray diffraction(XRD), X-ray fluorescence analysis(XRF) and Transmission electron microscopy(TEM). The results showed that Au/Al-PILM exhibited higher catalytic activity for the oxidation reaction of CO, and 100% conversion of CO was achieved at reaction temperature of 250°C when gold precursor was loaded on the Al-PILM carrier at 60°Cand calcined it at 450°C for 1h.

Abstract: The effects of copper deposition with three different additives were studied, which are triethanolamine, selimium dioxide and allylthiourea in citrate electrolyte. SEM (scanning electron microscopy) was used in the investigation of surface structures formed in the course of processing. The cathode polarization test was to tell the influence of different components and electroplating conditions to the plating system. Through orghogonal experiments, it was observed that the best additive combination is triethanolamine 3ml/l, selimium dioxide0.012g/l and allylthiourea0g/l.

Abstract: A variety of loadings of Cobalt oxide (Co₃O₄) was successfully supported on the reduced graphene (Co₃O₄/rGO) as the catalyst to activate peroxymonosulfate (PMS) to generate sulfate radicals (SO₄⁻•) for degrading Orange II in water. The crystal structure of Co₃O₄/rGO with different loadings was characterized by X-ray diffraction (XRD), and their catalytic activity was compared in the same conditions. The result showed that the catalyst has an optimum Co₃O₄ loading. Using the 70.7% loading of Co₃O₄ in Co₃O₄/rGO as the catalyst, 100% decomposition could be achieved within 4 min with 1 mM Orange II, 0.05g/L catalyst, and 10 mM PMS.

Abstract: Titania nanoparticles were obtained by an ultrasonic assistant sol-gel method. The prepared titania nanoparticles were characterized by X-ray diffraction (XRD) and differential scanning calorimeter (DSC). The photocatalytic properties of the prepared titania were evaluated from the photodegradation of X-3B solution. The thermalanalysis results showed that the weight loss of prepared TiO₂ particles ends at about 500°C, and the appropriate condition of calcination was found to be 2 h at 500°C. The XRD results showed that anatase was the main phase of prepared TiO₂ nanoparticle, and the average crystallite size of the TiO₂ particles, calcined for 2 h at 500°C was calculated as 15.3 nm using the Scherrer equation. The results demonstrated that such nanoTiO₂ showed high photocatalytic activities for X-3B degradation, whether it is under UV irradiation or sunlight irradiation.

Abstract: UV-curable adhesive has the characteristics of energy conservation , environmental protection and fast curing. As countries around the world pay more and more attention to the environment problem , the development of UV curable adhesive is also growing rapidly. This paper introduces the composition of UV curable adhesive (prepolymer ,active diluent, photoinitiator, additives), and introduces the UV-curable adhesive several huge potential application fields in detail.

Abstract: Four types of organo-functionalized mesoporous silicas were synthesized by post-grafting method, and characterized by powder X-ray diffraction, nitrogen adsorption/desorption and fourier transform infrared spectroscopy. In addition, adsorption behaviors of the prepared material modified with different functional groups were studied by adsorption of phenol in aqueous solution. When the concentration of phenol was 800 mg/L, the equilibrium adsorption capacity of N-aminoethyl-γ-aminopropyl-MCM-41, aminopropyl-MCM-41, mercaptopropyl-MCM-41 and propyl-MCM-41 was respectively as 2.5 times, 2.2 times, 1.9 times, and 1.7 times as that of MCM-41. It was due to the introduction of organo-functional groups, changing the polarity of the channel surface, and increasing the hydrophobic properties. N-aminoethyl-γ-aminopropyl and aminopropyl groups could generate acid-base interactions with phenol, therefore, their adsorption capacity increased much more. Besides, the pH value of the solution could significantly affect the adsorption amount of phenol on samples. The result showed that with the increase of pH, the adsorption amount of phenol increased at first, and then decreased. The maximum adsorption amount of all the prepared materials occurred at about pH value of 6.

Abstract: Ferric oxide modified montmorillonite (Fe₂O₃@M) was prepared with the method of microwave-assisted ion-exchange and in-situ precipitation, with Fe₂O₃ nanoparticles intercalated into the interlayer of montmorillonite. Rhodamine B (RhB) was employed as a probe compound to study the adsorption characteristics of organic pollutants with Fe₂O₃@M as the adsorbent. The effect of pH and adsorbent dosage were investigated and the results showed that the maximum of adsorption capacity for RhB was 58.8 mg g^-1. The adsorption capacity of Fe₂O₃@M for RhB was augmented along with the increase of adsorbent dosage. The Fe₂O₃ modified montmorillonite exhibits a much better adsorption capacity in an acidic solution than that in an alkaline solution. The adsorption process was well fitted the Langmuir and Freundlich isotherm model, respectively, and the adsorption reaction kinetics complied with a pseudo second-order kinetics model.

Abstract: In this study, porous Ta₃N₅ nanorods were sucessfully fabricated via electrospinning-calcination-nitridation method. The porous Ta₃N₅ nanorods are composed of Ta₃N₅ nanoparticles with diameters ranging from 30 nm to 80 nm. The porous Ta₃N₅ nanorods show significantly enhanced photocatalytic activity for the degradation of Methyl blue (MB) under visible light than commercial Ta₃N_5. Importantly, The porous Ta₃N₅ nanorods can be used as an easily recyclable photocatalyst with wide visible-light response.

Abstract: The undecylenate based diol (UAD) has been synthesized from undecylenate by esterification and thiol-ene click reaction sequently, and then it was used as a diol to prepare bio-based waterborne polyurethane (WPU) reacting with isophorone diisocyanate (IPDI) and castor oil-based carboxyl hydrophilic chain extender. The structure of undecylenate based diol was verified by hydrogen proton nuclear magnetic resonance (1H NMR). Fourier transform infrared spectroscopy (FT-IR) was used to characterize the structure of WPU film. Furthermore, particle size and viscosity were used to character apparent properties of the bio-based waterborne polyurethane dispersion. The result shows that: bio-based waterborne polyurethane dispersion is transparent and very stable under room temperature. This work provides a simple and efficient method for the preparation of fatty acids based polyols and bio-based waterborne polyurethanes.

Abstract: In this paper, a series of fluoro-silicone -containing acrylate emulsion (FSiAE) have been prepared through pre-emulsified semi-continuous seed emulsion method with OP-10, sodium dodecyl sulfate (SDS) as the emulsifier, ammonium persulfate (APS) as the initiator, methyl methacrylate (MMA) and butyl acrylate (BA) as the main monomers, 2,2,3,4,4,4-hexafluorobutyl methacrylate (G02) and methacryloxy propyl trimethoxyl silane (KH-570) as the functional monomers, The effect of the content of fluoro-silicone -containing monomer on the properties of acrylate emulsion and their films, such as the contact angle, water absorption, viscosity and hardness was investigated. The results show that functional monomers had effectively copolymerized with acrylic monomers, and the introduction of fluoro-silicone into the polyacrylate emulsion system did make the viscosity of the emulsion increased, the water absorption and the surface energy of the film decreased.