Study On Preparation Of Antimony Doped Tin Oxide Nanomaterials Prepared By Electrospinning

In order to satisfy the increasing demand of consumer electronic products, photoelectric products, and more and more intelligent architectural materials, it’s urgent to find a novel transpare nt conductive oxide(TCO) which is cheap and owns good properties as well. Indium tin oxide(ITO) is the most widely used transparent conductive oxides. However, its raw material Indium is expensive and the manufacture technology is complicated. Therefore, comparatively economical antimony-doped tin oxide(ATO) has become the principal substitute. Electrospinning is a kind of simple, novel, high-efficient, and relatively economical way to prepare nano-materials which can produce ultrafine and highly dispersed ATO nanoparticles.This paper successfully prepared ATO nano- fibers, short nano- fibers and nanoparticles by electrospinning which owned satisfied structure and high conductivity. Study of the mainly factors that affected their structures and properties and the characterization of their structure and properties were carried out. The precursor solution was prepared by adding a certain amount of polyacrylonitrile into dimethyl formamide. Then the solution was magnetically stirred to transparent. After this, a proper ratio of Sn C l4·5H2O and Sn C l3 were added into the precursor solution, which was magnetically stirred to transparent. Then, precursor solution were electrospun into precursor nano- fibers by adjusting the parameters of electrospinning into an appropriate condition. At the same time, the influence factors of the precursor nano- fibers such as PAN concentration, weight percentage of total salt and the diameter of springe were studied. After this, the precursor nano- fibers were calcined in an appropriate temperature to prepare ATO nano-fibers which could be used to prepare nanoparticles and super-short nano- fibers. Meanwhile, the factors that influenced the morphology and crystallization of ATO nano- fibers, such as annealing temperature, annealing time, and heating rate were studied. The precipitation rate of suspension solution could be a reference of the dispersity and the grain size of ATO nanoparticles were clarified by TEM. Therewith, the nano-particles were prepared by manually grinding from the ATO nano- fibers. The dispersity of ATO nanoparticles was studied through the precipitation rate of the suspension and the diameter of ATO nanoparticles Thus, research of the optimum parameters like temperature and Sb C l3 concentration in salt came into a conclusion: when the weight concentration of Sb C l3 was 7 wt%, annealing temperature was 700 oC, and heating rate was less than 5 oC/min, the obtained short nano-fibers could be less than 1000 nm in length and no more than 500 nm in diameter after grinding for 1 min, and the final size of ATO nanoparticles could reach 15 nm. The electrical resistivity of ATO was 0.7207 Ω·cm when the annealing temperature is 700 oC and the concentration of Sb Cl3 is 7 wt%.