Researches On Hydrogen Production Based On Photocatalytic Metal Iron Salts And CO₂ Reduction Based On Organic Framework Manganese Complexes Photocatalysis

The research of photocatalytic hydrogen production and photocatalytic reduction of CO₂ has become more and more important,because of the two global problems of energy and environment.Scientists are more concerned about the precious metal complexes in terms of the two aspects of the photocatalytic catalyst,but these catalysts the possibility of large-scale application is not large because of its high cost.This paper mainly studies two aspects content: the cheap metal salts of photocatalytic hydrogen production and organic manganese complexes in photocatalytic reduction of CO₂.In order to find various reaction groups more suitable for the two kinds of photocatalytic system,the research group explored a large number of experiments,the conclusions are as follows:1.In the use of inorganic metal salts and metal complexes as catalysts,respectively,with six hydrated terpyridyl ruthenium?Ru?bpy?₃Cl₂·6H₂O,later abbreviated as [Ru]?as photosensitizer,the solvent volume ratio is 1 to 1 mixed solvent of organic solvent with water,and mixed with organic small molecule 1,3-two methyl-2-phenyl benzimidazole?BIH?as a sacrificial agent of photocatalytic hydrogen production system,by adjusting the dosage of BIH can make the maximum hydrogen yield?TON is 682?,and the use of any iron or iron complexes as catalyst,the hydrogen yield is approximately equality.In addition to the system of the photosensitizer and sacrificial stability and the system of the catalytic mechanism was studied,the photosensitizer life than sacrificial agent much longer and the system has carried out the molecular mechanism of the catalytic metal and catalytic mechanism.2.The organic framework manganese complexes as catalyst in the photocatalytic reduction of CO₂ is due to the organic manganese skeleton structure is easy to adsorb CO₂.According to the experiment proved that,in [Ru] with TEOA and BIH as photosensitizer,double sacrificial agent in organic solvent as solvent under the conditions of photocatalytic reduction of CO₂ by experiment.The product CO is not as much.In the case of other conditions unchanged,only the pure organic solvent was replaced with organic solvent and water mixed solvent after the photocatalytic hydrogen production experiments,the production of hydrogen is less than half of the output of CO.