Research On Key Technology Of Triboelectric Ultraviolet System

In the wild and power-poor regions,especially in sub-Saharan Africa where the rate of access to electricity is only 44.6%,many diseases are related to water pollution.The cause of the large-scale plague is usually that the microorganisms in the water cannot be effectively removed.Therefore,drinking water sterilization and wound disinfection have attracted more and more attention.At present,most common outdoor drinking water disinfection methods will cause secondary pollution,resulting in low quality for drinking water.In recent years,ultraviolet sterilization has become more and more accepted as a new sterilization technology,especially it has the characteristics of fast sterilization and no secondary pollution.In addition,ultraviolet rays are also widely used in medical treatment,chemical testing and other fields.However,the current generation method of artificial ultraviolet rays is largely dependent on the power grid,which will lead to great restrictions on the use of ultraviolet technology in areas of no or poor electricity.In view of the power supply problems encountered when applying ultraviolet rays in the field and in areas with poor electricity,this paper innovatively proposes the concept of triboelectric ultraviolet system,which greatly supplies the application of ultraviolet technology in the absence of power grid.The key technology is to use the triboelectric nanogenerators(TENGs)to drive the ultraviolet generator which could directly generate triboelectric ultraviolets.It has the advantages of simple structure,safety and economy,energy saving and environmental protection,and is not limited by the power grid.In this paper,firstly,the overall structural of the triboelectric ultraviolet system was designed.Focusing on the design of TENG structure and the triboelectric UV generator,the overall structural of the system was determined.In order to improve the portability and practicality of the triboelectric ultraviolet system,a hand-held portable triboelectric ultraviolet system was designed.Then,the performance analysis of the system was carried out.The effects of different design parameters for system were analyzed in detail on the perspective of electrical characteristics,spectral characteristics,and photoelectric conversion efficiency.Subsequently,the physical modeling and simulation of the discharge process of the triboelectric ultraviolet system was carried out.The commercial software COMSOL was used to simulate the glow plasma discharge process,and the change rule of electron density,electron temperature and other plasma properties of the ultraviolet reactor during the discharge was found.The accuracy of the simulation was verified through the comparisons between simulation and experiment.Finally,the application experiments for the system in three different fields of biological sterilization,UV-curing and chemical detection were chosen to initially verify the effectiveness and practicality.This article provides new ideas for the application of UV in a grid-free environment,it’s not only greatly supplying and broadening the application fields of UV technology,but also contributing to the development of TENG in the field of high-voltage applications.