Photothermal catalytic method for production of hydrogen peroxide without sacrificial reagents on basis of porphyrin-based supermolecule

A method for photothermal catalytic production of hydrogen peroxide without a sacrificial reagent on the basis of a porphyrin-based supermolecule, comprising the following steps:

• (1) ultrasonically dispersing a porphyrin catalyst in water to obtain a porphyrin catalyst dispersion with a concentration of 0.3-1.5 g/L of the porphyrin catalyst, wherein the porphyrin catalyst is at least one selected from the group consisting of
• 5,10,15,20-tetrakis(4-methoxycarbonylphenyl)porphyrin (TPP-COOMe),
• 5,10,15,20-tetrakis(4-sulfophenyl)porphyrin (TPPS),
• 5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin (THPP),
• 5,10,15,20-tetrakis(4-aminophenyl)porphyrin (TAPP),
• 5,10,15,20-tetrakis(4-pyridyl)porphyrin (TPyP), and
• 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin (TCPP);
• (2) continuously introducing O2 into the porphyrin catalyst dispersion obtained in step (1) at a temperature of 40-80° C., and conducting stirring and irradiation with a visible light for a reaction for a period of time;
• and
• (3) filtering a reaction product obtained in step (2) to obtain an aqueous hydrogen peroxide solution.