Study On Catalytic Hydrogen Evolution Of Photocatalyst Based On Graphite Phase Carbon Nitride And Metal Nanoparticles

The increasing consumption of energy and the depletion of existing resources have caused us to have a great demand for green renewable energy.Of all renewable energy sources,solar energy is the most powerful,and converting it into usable energy will help solve the energy problems facing our society.Photocatalytic decomposition of water to produce hydrogen is a good way to convert solar energy into chemical energy.This method can not only provide high energy,but also help protect the environment.At present,the material with a promising application in the field of photocatalysis is graphite-phase carbon nitride（g-C₃N₄）.This material has many advantages,but it also has some shortcomings,which make it unable to be widely used.This article attempts to modify metal nanoparticles to improve their catalytic activity.Structural characterization,and the results of photocatalytic hydrogen evolution activity evaluation results show that loading 1wt.%Of Pt can significantly increase the rate of hydrogen evolution from its crisp flowers.Next,we focused on the effects of different loading processes of Pt nanoparticles,reduction pretreatment of catalysts,and different sacrificial agents on the catalytic performance of Pt@g-C₃N₄ catalysts.Then the catalysts were characterized by x-ray photoelectron spectroscopy（XPS）,transmission electron microscopy（TEM）,and x-ray diffraction（XRD）.The composition and morphology of platinum nanoparticles were studied under different conditions to determine the effect of g-The main factor of C3N4activity.In addition,we also clarified the interaction of supported metal ions with g-C₃N₄ and its effect on the catalytic activity of g-C₃N₄.Finally,on the basis of summing up the knowledge of the Pt@g-C₃N₄system,we investigated the effect of the binary alloy loading of platinum and cobalt on the catalytic hydrogen evolution rate of g-C₃N₄.The photocatalytic hydrogen evolution activities of different Pt Co@g-C₃N₄ were evaluated and compared with pure platinum systems.It is found that compared with Pt@g-C₃N₄,the Pt Co cocatalyst can improve its performance under simple impregnation or chemical reduction,and the chemical reduction preparation method is the most effective method to improve its photocatalytic performance.