Fabrication Of Rare Earth-Doped Titania Nanobelts Via Eiectrospinning And Their Photocatalytical Properties

Nano- TiO2 particles, a prospective photocatalytic material, have very wide applications in areas such as environmental protection, solar energy conversion and industrial catalysts. TiO2 was only excited by shorter UV and the solar energy utilization is low. Dope of TiO2 is an important way to achieve visible response and to improve the quantum efficiency, thus photocatalytic activity can be greatly improved. Electrospinning technique is an important method to prepare one-dimension nanostructures and has drawn much awareness from scientists owing to its simple equipments and extensive adaptability. Research on the preparation, properties and application of nanobelts by electrospinning will be a valuable subject.In this dissertation, we firstly prepared precursor solution using sol-gel method, then synthesized PMMA/[Ti(OC4H9)4+Gd(phen)2(sal)2Cl],PMMA/[Ti(OC4H9)4+Nd(P hen)2(sal)2Cl],PMMA/[Ti(OC4H9)4+La(phen)2(sal)2Cl],PMMA/[Ti(C4H9)4+Y(phen)2s al)2Cl] and PMMA/Ti(OC4H9)4 composite nanobelts by electrospinning, and finally fabricated TiO2, Gd/TiO2, Nd/TiO2, La/TiO2 and Y/TiO2 nanobelts by calcinations of the relevant composite nanobelts. The samples were characterized by XRD,SEM, TG-DTA and FTIR. The results showed that nanobelts were regular one-dimensional structure and the thickness was about 300nm, and mean width ranged from 60μm to 80μm.Besides, the photocatalytic properties of TiO2, Gd/TiO2, Nd/TiO2, La/TiO2 and Y/TiO2 nanobelts on Rhodamine B, methyl orange and photographic waste liquid were investigated. The results showed impact factors for photocatalytic property were the added amount of catalyst, pH of degradation of the solution, volume of rare-earth-doped and the calcination temperature. The photocatalyst doped with (in Mole, the same below) 0.5%Nd3+ could degrade the rhodamine B effectively, while nano-TiO2 doped with 1.0%Gd3+ displayed an excellent activity in degrading the methyl orange, and nano-TiO2 doped with 1.0%Gd3+ demonstrated an excellent activity in degrading the photographic waste liquid. The photocatalysts doped with different rare-earth ions showed a selective degrading activity to different degradation agents.