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Degradation of Pollutant and Antibacterial Activity of Waterborne Polyurethane/Doped TiO_2 Nanoparticle Hybrid Films 被引量:1
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作者 邱珊 deng fengxia +3 位作者 XU Shanwen LIU Peng MIN Xinmin 马放 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2015年第3期447-451,共5页
The waterborne polyurethane/doped Ti O2 nanoparticle hybrid films were prepared. Nd, I doped Ti O2 was prepared with a 50 nm particle size firstly. The hybrid film was prepared by mixing doped Ti O2 with waterborne po... The waterborne polyurethane/doped Ti O2 nanoparticle hybrid films were prepared. Nd, I doped Ti O2 was prepared with a 50 nm particle size firstly. The hybrid film was prepared by mixing doped Ti O2 with waterborne polyurethane, followed by heat treatment. The presence and nanometric distribution of doped Ti O2 nanoparticles in prepared membranes is evident according to SEM images. The photocatalytic activities of doped Ti O2 were signifi cantly enhanced compared with pure Ti O2 powders. After the hybrid fi lm fabrication, the photocatalytic activities were almost the same as the pure catalysts with kMB of 0.046. In the antibacterial testing, the hybrid fi lms can inhibit E. coli growth. A signifi cant decrease in membrane fl uidity and increase of permeability of E. coli were observed. 展开更多
关键词 doped TiO2 POLYURETHANE hybrid film photocatalytic activity ANTIBACTERIAL
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Different Heterogeneous Fenton Reaction Based on Foam Carrier Loaded with Photocatalysts
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作者 邱珊 LI Guangming +1 位作者 deng fengxia MA Fang 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2018年第1期85-90,共6页
The effect of heterogeneous Fenton reaction was studied on methylene blue(MB) and Nitrosomonas europaea(N. europaea) cells. Four Fenton systems were prepared and compared with each other, including Nickel Foam(NF... The effect of heterogeneous Fenton reaction was studied on methylene blue(MB) and Nitrosomonas europaea(N. europaea) cells. Four Fenton systems were prepared and compared with each other, including Nickel Foam(NF)/TiO2, NF/Bi2WO6, Ceramic foam(CM)/TiO2, and CM/Bi2WO6. The order of effect of fenton reaction ranked as NF/TiO2〉CM/TiO2〉NF/Bi2WO6〉CM/Bi2WO6. In acid or alkaline solution, the removal efficiency also decreased compared with neutral solution. With lower p H values, the nanoparticles were easier to break off from NF skeleton. Thus the synergetic effect of photocatalysis and fenton reaction can not take action. As for CM skeleton, the bond –Si-O-can bind with TiO2 or Bi2WO6. The membrane fluidity was used as an indicating parameter. After being treated by Fenton reaction, N. europaea surface was rougher than the native bacterium and the bulges on cell surface became irregular, which is attributed to change of lipopolysaccharide patches. Polarization of N. europaea cell membrane in acid medium increased more obvious than alkaline medium. 展开更多
关键词 fenton reaction N europaea POLARIZATION DEGRADATION MEMBRANE
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