Study On Modification And Performance Of TiO₂-B Nanobelts

The increasing research activities and great progresses in fundamental aspects and practical applications of nanomaterials and nanofabrication technologies are changing the world.The amazing properties of nanomaterials have revolutionized many industries,with numerous nanomaterials and nanomaterial-based technologies having been commercialized.In particular,since TiO₂ was found to be a chemically stable,low cost,environment-friendly,and efficient hydrogen production photocatalyst,it has been widely used for several applications,such as photocatalysis,solar cells,gas sensors,and biosensors.1D nanostructures have shown distinctive advantages with respect to 0D and 2D materials.1D nanostructures have the smallest dimensionality that allows two key properties for photocatalysis and nanodevices to be combined in the same material: fast electron transport and effective charge transfer.Among the different materials obtained with a belt-like geometry,TiO₂ nanobelts — with a large concentration of exposed active facets and exceptional electronic,optical and mechanical properties — have raised particular interest.Thanks to the large effort in developing synthesis methods to produce this material,single crystal TiO₂ nanobelts with exceptional crystallinity and a very low concentration of defects and dislocations are available.These nanostructures are characterized by exceptional charge transport properties,with fast charge transportation along the axial direction,and an easier recyclability than granule-like nanoparticles.The main contents and conclusions are as following:?1?The NiO/TiO₂-B hybrid nanomaterials were synthesized by a hydrothermal process and subsequently a uniform precipitation-method.According to electrochemical investigations,the nanostructured hybrid material as anode exhibits superior initial charge/discharge capacity and capacity retentions.The results indicated that The NiO/TiO₂-B hybrid nanomaterials deliver a high discharge capacity and capacity retentions over 50 cycles,implying excellent cycling stability with reversible capacity which is higher than that of isolated TiO₂-B nanobelts.?2?BiOCl nanosheets-coated TiO₂ nanobelts heterostructures?BiOCl/TiO₂?were prepared via a two-step solvothermal process.According to the photocatalytic performance investigations,The results indicated that the as-prepared sample possessed much higher photocatalytic activity compared to the pure BiOCl and the TiO₂ nanobelts.The photodegradation rate constant of the BiOCl/TiO₂?1:1?is the most desired.