Study And Analysis Of Organic Semi-conductor Carbon Nitrides By Metal Ions Doping

In today's world,with the increasing depletion of traditional energy,and as a strategic resource vulnerable to multiple forces and factors,clean renewable energy needs to be developed,and solar energy is such a high-quality energy.At present,photocatalytic decomposition of hydrogen by solar energy is a very hot way to utilize solar energy.Obviously,catalyst plays an important role in this reaction.Generally speaking,titanium dioxide photocatalyst has the core disadvantage of low solar energy utilization,which seriously restricts the development and application of photocatalyst technology.Therefore,new photocatalytic materials with high photocatalytic efficiency have been put on the research agenda by many researchers.In order to try to solve some problems,this paper selects graphene carbonitride as the research object,which is a new type of semiconductor catalytic material.Because of its simple synthesis way,attractive energy band structure,highly stable physical and chemical properties,and easy to get synthetic materials,it has attracted the attention of the academic community.The different properties of graphene carbonitride obtained by different preparation methods were studied,and the preparation direction of improving reaction yield was summarized.It is found that the cut-off wavelength of spectral absorption increases with the decrease of heating rate.In addition,under the same conditions,the samples with melamine as raw material perform better than those with urea as raw material;the cut-off wavelength of annealed samples is lower than that before anneal,but the curve is steeper thus the crystallinity is better.For the influence of ion doping,it is found that ion doping can significantly increase the absorption range of the sample and theabsorption response intensity of the visible light part.In addition,it is found that the argon hydrogen atmosphere,lithium atmosphere and lithium potassium atmosphere play a considerable role in improving the performance of Graphitic carbon nitride.It is hoped that this paper will provide a new way to study the reaction mechanism of graphene based Graphitic carbon nitride and other two-dimensional photocatalysts.