Preperation Of Photocatalyst Hydrid Fiber By Bacterial Cellulose’s Template Effect And Research Of Its Photocatalytic Properties

Nanoscale Science and Technology is one of the highly sophisticated technology of the world, and is becoming the focus of study nowadays. ZnO nano materials as a novel functional materials, is a one of the most popular objects amoung all the fields of nanomaterials. Due to its excellent physical properties, ZnO nano materials is widely used in the field of ceramics, paint, rubber and optoelectronics. ZnO nano materials as an alternate to the TiO2nano materials has attracted many attentions among many scholars domestic and abroad, because the two materials have the similar band gap and ZnO nano materials shows higher catalytic activity in some photocatalytic degradation experiments than TiO2nano materials. With the study and application of nano ZnO material deepening, many drawbacks of tradition nano ZnO materials have gradually exposed, such as easy inacativation, easy cohesion, difficult recycling, etc. Catalyst immobilized is one of the most useful method to resolve the problem metioned above. Bacterial cellulose as an envrionment-friendly biomaterials involved in the reaction can not only achieve the green synthesis of ZnO nano materials but also solve the problems above.In this paper, we used hydrothermal and co-precipitation method to prepare ZnO/BC hybrid fibers and ZnO/CdS/BC ternary fibers. The crystal structure and morphology were characterized by XRD, SEM, FT-IR, UV-Vis, XPS,etc. The photocatalytic activity of ZnO/BC hybrid fibers was studied under the irradiation with ultraviolet light with the methyl orange, methylene blue, rhodamine b as the objective decomposition substance. We also used methyl orange as the objective decomposition substance to study the photocatalytic activity under the irradiation with xenon lamp. The results showed that:ZnO/BC hybrid fibers dispersed well showed short diameter, homogeneous aspect ratio through hydrothermal synthesis. Meanwhile from TG and SEM images we can see that ZnO which deposited on the surface of BC fibers has splendid morphology and the weight of ZnO which loaded in the BC fibers is high. ZnO/CdS/BC ternary fibers prepared by co-precipitation method showed enhanced absorption in the visible light with the increase of CdS contents. The study of photocatalytic activity for methyl orange, methylene blue, rhodamine b showed that:No extra methyl orange, methylene blue and rhodamine b used ZnO/BC hybrid fibers could be found under90min,18min,60min irradiation of ultraviolet light, when initial concentration is20mg/L, dosage of photocatalyst is0.1g/L. And the extra21%degradation rate of methyl orange could be found under180min irradiation of xenon lamp,when initial concentration of methyl orange is20mg/L. And cycle experiment indicate that hybrid fibers have a great potential for industrial applications.