Preparation Of Nano Environment Materials By Bacterial Cellulose’s Template Method And Research Of Their Properties

The bacterial cellulose membrane is a renewable and environmental friendly biomaterial, it shows many advantages such as strong mechanical properties, good chemical stability and low price. In order to make the bacterial cellulose membrane apply to the photocatalytic degradation of wastewater and anticorrosion of proton exchange membrane, We make a study of loading nanoparticles on the bacterial cellulose membrane.We took advantage of the hydroxy force on the surface of the bacterial cellulose membrane as the soft chemical template to prepare the CdS/TiO2/BCM catalyst. According to the structure of the bacterial cellulose membrane assisted the characterization of XRD, SEM, XPS etc, We established the the molecular diffusion model and clarified the growth mechanism of TiO2 nanoparticles on the bacterial cellulose membrane. The catalyst could be responsed to the visible light quickly after doped CdS nanoparticles. The photocatalytic activity of the CdS/TiO2/BCM catalysts was studied with the methyl orange, methylene blue and rhodamine B as the objective decomposition substance. The result showed that the catalyst prepared by hydrothermal method showed high catalytic performance and good recycling performance of degradation of dye, so the result indicated that there is a great potential for industrial applications on the catalysis.For the proton exchange membranes (PEM), It should show not only high proton conductivity but also good chemical stability. However, Hydrogen peroxide can be came into being during the long-term operation of proton exchange membrane fuel cell. It has been shown that·OH and ·OOH radicals produced by reaction of hydrogen peroxide with trace metal ions on the electrode and electrolyte of the fuel cell are responsible for membrane degradation. In this paper, the CeO2 inorganic nanoparticles were proposed to modify the bacterial cellulose membrane. Taking advantage of good scavenging properties of inorganic nanoparticles for both hydroxyl radicals and peroxide radicals, the membrane will harvest improved chemical resistance. In addition, the catalytic activity was enhanced by the Pt nanoparticles loading on the CeO2 inorganic nanoparticles. The test of the catalytic performance showed that the hydrogen peroxide can be degradated quickly by the CeO2 inorganic nanoparticles, and the photocatalytic degradation efficiency was improved as loading Pt nanoparticles on the CeO2 nanoparticles.