The Construction Of Sn₃O₄ Micro/nano Structure And Its Photoelectric Properties

Tin is abundant in the earth.Tin oxide has attracted much attention due to its special physical and chemical properties.Among them,common tin oxides such as SnO and SnO2 have been widely used in lithium batteries,photocatalysis and other fields.In addition to the common single valence tin oxides,the mixed valence tin oxides such as Sn3O4 have very different physieal and chemical properties.Sn3O4 is a narrow bandgap semiconductor material with a band gap width of 2.8eV.It has unique photoelectric properties.In this paper,we successfully prepared Sn3O4 nanosheets and Sn3O4@TiO2 nanoarrays.After that,we tested their photoelectric properties.The specific contents are as follows:Firstly,we successfully synthesized Sn3O4 nanosheets by hydrothermal method.The samples were characterized by SEM,TEM and HRTEM.The results showed that the thickness and diameter of the nanosheets were about tens of nanometers and hundreds of nanometers respectively.We confirmed by XRD and Raman that the synthesized sample was Sn3O4 rather than a mixture of SnO and SnO2.Next,the samples were characterized by PL and XPS.Experimental results show that it has excellent photoelectrochemical and cyclic properties.Secondly,we successfully synthesizedSn3O4@TiO2 nanoarrays in two steps by hydrothermal method.The samples were characterized by SEM,TEM and HRTEM.The results showed that we successfully synthesized the sample.We tested the photoelectrochemical properties of the samples.We found that the photoelectric performance of nanoarrays are significantly increased compared with Sn3O4.We synthesized Sn3O4 nanosheets and Sn3O4@TiO2 nanoarrays by hydrothermal method,and carried out photocatalytic test on them.Through the degradation test of rhodamine,we found that Sn3O4 nanosheets have excellent catalytic performance and cycling stability.We tested the photocatalytic performance of Sn3O4@TiO2 nanoarrays under ultraviolet light and visible light respectively.The results show that Sn3O4 and Sn3O4@TiO2 have excellent catalytic properties...