Advanced Materials Research Vols. 183-185

Abstract: N-doped TiO₂ were prepared by hydrothermal synthesis at different temperature. Then to test the photocatalysis by degradation of organophosphorus pesticide. We can come to the conclusion that high hydration temperature had a negative impact on the photocatalysis. The resulting materials were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), etc. This study has developed a promising and practical pathway to nitrogen-doped photocatalysts.

Abstract: N, S codoped titania with high photocatalystic properties were prepared by hydrothermal method. The resulting materials were characterized by X-ray diffraction, X-ray photoelectron spectroscopy. N, S codoped titania displayed a better degradation rate of organophosphorus pesticide under visible light irradiation. The utility of N, S codoped TiO₂ as a photocatalysis over undoped titania entirely, whether the requirement for visible-light functionality, even if at low efficiency, outweighs a modest drop in the efficiency of catalysis using UV light.

Abstract: In this paper, the degradation of organophosphorus pesticide by nitrogen and sulfur codoped TiO₂ photocatalysts under iodine-tungsten lamp irradiation has been investigated. And we adjusted the concentration of nitrogen to see the change of particle size of nitrogen and sulfur codoping TiO₂. According to the X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), the different concentration of N, S codoping under different calcination temperature was discussed. N, S codoped TiO₂ sample has a smaller particle size at a low anneal temperature than the one at high anneal temperature.

Abstract: Adjusting the nitrogen content of N doped titania which were prepared by hydrothermal method to discuss the influences of the photocatalytic properties and the modifications. It was also established that N doped TiO₂ powders enhances the Vis-light absorption. Finally the photocatalytic properties of catalysts were tested in the degradation of organophosphorus pesticide. The resulting materials were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), etc.

Abstract: TiO₂ porous materials were prepared under hydrothermal conditions. The characteristic of the synthesized materials were measured by X-ray diffraction (XRD), Scanning electron micrograph (SEM). The materials give excellent adsorbability and photocatalytic activity in the degradation of methylene blue (MB) under UV lamp.

Abstract: In this research, the nanometer-sized TiO₂/quartz sand photocatalyst was prepared by sol-gel method. The structure of the composite samples was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). And the photocatalytic degradation for the methylene blue (MB) solution have been inverstigated in visible light. The influence of calcining temperature was discussed. The result showed: heat treatment of the material loaded on quartz sand at 400 °C was most effective. The decolorization rate of methylene blue (MB) can be reached 96.92% under 4.5 h xenon lamp irradiation.

Abstract: Used the method of transplanting in studying area, simulated different arrangement of plant spacing and observed the wind speed by using HTSW-18 multiple-sensor automatic anemoscope. The results showed that two kinds of plants of different plant spacing can effectively reduce wind speed, the ration of reducing wind velocity of shelterbelts were biggest at the observation point of 1H behind the shelterbelt. The ration of reducing wind velocity and roughness of shelterbelt of Salix psammophila was better than that of Artemisia ordosica Krasch. under the same plant spacing. The increasing of Artemisia ordosica Krasch. was seventeen times higher than that of control at the observation point of 1H. The roughness of Salix psammophila at the observation point of 1H was twenty-five times higher than control, and that of Artemisia ordosica Krasch. was seventeen times higher than control.

Abstract: Novel kenaf-based superabsorbent polymers (SAPs) were prepared by grafting acrylic acid (AA) and acrylamide (AM) onto kenaf cellulose. Graft copolymerization was carried out in aqueous solution using N, N’-methylenebisacrylamide (NMBA) as crosslinking agent and sodium bisulfite (NaHSO₃) and ammonium persulfate ((NH₄)₂S₂O₈) as initiator. The SAPs so obtained were examined by SEM. The absorbency of SAPs consists of different kenaf cellulose in deionized water, saline solutions and different pH value solutions were investigated.

Abstract: Taking the C30 complex high titanium heavy slag concrete (hereinafter referred to as CHTHSC) as example, this paper makes experiments and researches its performance on the long-term deformation and durability. The results show that, the CHTHSC will not lead to the problem of volume stability, and its shrinkage strain and creep meet the design standards. The CHTHSC shows no alkali- aggregate reaction, and its impervious grade, carbonation depth, Chloride ion diffusion coefficient, sulfate corrosion resistance coefficient meet the design requirements for concrete durability. The investigation on the durability of projects with the CHTHSC shows that the compression resistance of concrete in their cores is higher than design strength, with outward appearance unchanged. The experiment results provide important reference for the application of this kind of concrete.

Abstract: In order to search whether or not the kaolin ratio was one of the crucial reasons influenced on the durability of Poplar Plywood utilizing outdoor which was adhesive by phenol-formaldehyde resin. Xenon Lamp Climate Chamber process and ASTMD1037 Six-cycle method were evolved in this study to measure the durability of the plywood. There was no relativity between the kaolin ratio and the durability of the Poplar Plywood. The main factor impacting the endurance property of the Plywood was the degradations of veneer and Phenol-Formaldehyde resin caused by environmental change. The kaolin filling ratio of Phenol-Formaldehyde adhesive is not able to reduce the durability of the Poplar Plywood. Under the two method treatments, the bonding strength of the laminate wood still fulfills the Plywood GB/T17657-1999 National Stander even the ratio of kaolin is in high-level. Therefore, it is a preferable choice to adopt kaolin as filling in phenol-formaldehyde.