Papers by Author: Ling Li

Abstract: . The Ce3+/TiO2 complex membrane made from Ce3+on the TiO2 framework with the activity of photocatalysis were prepared. The degradation behavior of the best mass ratio of Ce3+/TiO2 complex membrane , and the influences of the diameters of particles of Ce3+/TiO2 complex membrane on the degradation of the harmful gases under 254nm and 365nm ultraviolet light or natural light in room were investigated. AFM result showed that the Ce3+/TiO2 complex membrane were composed of nanoparticles with 10nm~50nm diameters of particles. The experimental results revealed that the smaller the nanoparticles in Ce3+/TiO2 complex membrane, the greater the degradation degree was. The best mole ratio of Ce3+ and TiO2 was 5% and the best mass ratio of Ce3+/TiO2 and formaldehyde were 7.06 under 254nm and 365nm ultraviolet and 23.55 under the natural light in room after 24h when the degradation percents of formaldehyde were more than 90%. Same as above conditions ammonia were 8.76 and 25.79 and benzene were 15.65 and 35.32. The degradation percents of Ce3+/TiO2 complex membrane to harmful gases were higher about 3 times under 254nm and 365nm ultraviolet than under the natural light in room.

Abstract: TiO2/SiO2 complex nanofilm with high transmittance on solar cell glass was prepared by sol-gel method. Particle diameters, surface structures, the thickness of nanofilm and the transmittance of light from 400nm to 1100nm were tested with AFM, UV2550 and other instruments. The mole percents of TiO2 in SiO2 and their ratio influences on the transmittance of glass, aging ability and other properties of nanofilm were investigated. The AFM photos demonstrated that the TiO2/SiO2 film with high transmittance were composed of nanoparticles with 10nm to 30 nm diameters and their structures were meshes with many holes whose diameters were from 300nm to 500nm. The results revealed that as the mole percents of TiO2 in SiO2 increased the transmittance of solar cell glass with TiO2/SiO2 nanofilm decreased but the aging, adhering and wearing abilities increased and as the diameters of nanoparticles decreased the transmittances of solar cell glass with TiO2/SiO2 nanofilm increased under the condition of TiO2/SiO2 nanofilm with meshes of 300nm to 500m diameters of holes. When the mole percents of TiO2 in SiO2 were 0.1%~0.3%, the average diameters of particles in TiO2/SiO2 nanofilm were about 10nm and the structures of TiO2/SiO2 nanofilm were the meshes with many gaps and the diameters of holes were 300nm to 500nm. The increased transmittances were the greatest about 3.6%, increased value of solar cell efficiency about 3.8% and the aging, adhering and wearing abilities of TiO2/SiO2 nanofilm were best for 20 year life through rapid aging tests.