Graphite Carbon Nitride Morphology Control And Molecular Doping With Hydrogen Evolution Research

Since the 21 st century,fossil energy depletion and environmental pollution has became a serious challenge,which is a serious harm to the rapid development of human society.How to develop a clean renewable energy is one of the important research in today’s society.Hydrogen,as a highly efficient,green pollution-free renewable energy,is a great potential for the development of secondary energy.Compared with the traditional hydrogen production method,a new method,photocatalytic hydrogen production gains widespread concern,because it can use a wide range of solar energy.The most critical of photocatalytic technology is the synthesis of photocatalyst.Among the many photocatalysts,graphite carbon nitride as a new type of inorganic nonmetallic photocatalyst has been widely studied in the field because of its good stability and suitable band gap width.In this paper,the graphite carbon nitride was prepared by the molten salt method.After several times experiement,we synthesized the graphite carbon nitride successfully.The structure,properties and the relationship of the graphite carbon nitride were studied by characterization and measurement.Graphite carbon nitride with nanorod structure were synthesized by adjusting the ratio of raw materials and salt,reaction temperature and time.The effects of various experimental parameters on the growth process and morphology were studied.The optimum process parameters of the graphite carbon nitride were synthesized by the molten salt method.The addition of ammonium oxalate can be involved in the polycondensation process of melamine.On the on hand,inserting the amide group in the graphite carbon nitride structure and change the microstructure appearance,optical properties and hydrogen production performance.On the other hand,in the process of reaction of ammonium oxalate decomposition of NH3 and CO2,the original occupied position into a hole,played a role in pore-forming agent.In conclusion,the introduction of pores on the surface increases the specific surface area of the sample and increases the active sites of the reaction.And the introduction of the amide groups is beneficial to the transport of the charge and impr oves the separation efficiency of the photogenerated carriers.The photocatalytic hydrogen production of the material was improved.The graphite phase carbon nitride photocatalyst synthesized by thermal polymerization method was used as the substrate,and the graphite phase carbonitride synthesized by the molten salt method was used as the subjectee,and the size of the molten salt was used to grow on the substrate to encapsulate the graphite The homogeneous structure with nano-sized contact interface was constructed on the graphite phase carbonitride synthesized by thermal polymerization.This homojunction can effectively separate the photo-generated electrons and holes,thereby improving the photocatalytic hydrogen production of the material.