Preparation Of Inorganic Nanocables Via Electrospinning And Studies Of Photocatalytic Properties

Environmental protection has attracted more and more attention from the people with the increase of enviromental pollution. Semicoductor photocatalytic degration of organic pollutants is a new technology with energy-saving, pollution-free and wide application prospects. Single-component semiconductor possesses poor photocatalytic activity owing to its low efficienty for absorbing sunlight. Therefore, the modification of semiconduct photocatalyst has become one of the popular reseach subjects.In the dissertation, SnO₂@TiO₂ coaxial nanocables and SnO₂@ZnO coaxial nanocables were fabricated via coaxial electrospinnning. SnO₂/TiO₂ composite nanofibers SnO₂/ZnO composite nanofibers and SnO₂/ZnO composite nanobelts were fabricated via electrospinnning. The samples were systematically characterized by SEM, TEM, FTIR, XRD, TGA-DTA. The results show that the diameter of the prepared coaxial nanocables ranged from 100nm to 300nm, the diameter of the prepared composite nanofibers ranged from 100 nm to 300nm, the width of the prepared composite nanobelts ranged from 2μm to 6um. the thickness of the prepared composite nanobelts ranged from 240 nm to 600nm.The photocatalytic activities of prepared SnO₂@TiO₂ coaxial nanocables, SnO₂@ZnO coaxial nanocables, SnO₂/ZnOcomposite nanofibers, SnO₂/TiO₂ composite nanofibers, and SnO₂/ZnO composite nanobelts were studied by taking methyl orange, rhodamine B. photographic waste liquid as degradation agents, respectively. The factors of affecting to activity were systematicaly invesitigated by using the coaxial nanocables as photocatalysts. The results showed that concentration of the catalyst, calcination temperature had some influences on photocatalytic properties. By the analysis of ultraviolet and visible spectra (UV-VIS) of the samples, it was found that all the five kinds of photocatalysts exhibited certain photocatalytic activities for the different degradation agents.