Research On Preparation And Photocatalytic Activity Of Novel Semiconductor Coating Nanomaterial

After 20th centhery, Developing the exploitation sweeps an important path that the free from pollution solar energy becomes people to resolve energy crisis and pollution of the environment problem, Convert solar energy to become the heat that the scientists study to order for the solar cell of electric power. This text overview the development history of wet type solar cell, introduced oxide semi-conductor in detail two oxidize Ti as the research present condition of electrode material, Be also put forward using narrow forbid a bandwidth degree semi-conductor CdS and TiO₂ to become compound semi-conductor to raise light give or get an electric shock a conversion efficiency this have theories with actual meaning of topic.The oxide semi-conductor TiO₂ has special optics, science of electricity and chemistry property, (Eg=3.2ev) the width but cannot fully use the visible light in view ofits energy gap the question, Uses the narrow forbidden band semiconductor compound is one kind ofeffective measure, two forms the compound semiconductor thin film, On the one hand expands the thin film as a result of the CdS narrowenergy gap the light absorption scope; On the other hand, as a resultof energy band overlap, Interrogates uses dissolves the gel gelation gelling bonded joint toprepare two kind of gables materials and separately conducts theresearch to its photochemical catalysis performance, The result indicated that, gable photochemical catalysis materialactiveness had the very big enhancement, from original ultraviolet rayconditional transfer to visible light. Uses the sol to congeal the bonded joint (the Sol-Gel law) to preparethe CdS-TiO₂ compound material semiconductor photocatalyst, Take the 125W-365nm ultraviolet lamp as the photosource, the methyleneblue solution as simulates the dye waste water object, studies theCdS-TiO₂ compound material in the specific photochemical catalysisreactor photochemical catalysis activeness and the photochemicalcatalysis degeneration methylene blue characteristic and the rule.