Concerted high innergenerated-H2O2 photocatalysis and Photo-Fenton degradation of organic pollutants over SCNO@CdS

Photocatalytic oxidation technology as the environment-friendly treatment method can oxidize organic pollutants into pollution-free small-molecule inorganic substances by producing radicals, holes and hydrogen peroxide. To effectively improve photocatalytic activity, Photo-Fenton reaction of innergenerated-H2O2 is purposed, and the morphology of semiconductor photocatalysts must be precisely controlled during the formation process. According to the experimental characterization and photocatalytic analysis, it is evident that the resultant large specific surface area and good optical capability play the synergetic contributions for their superior pollutant degradation during photocatalysis and Photo-Fenton reaction. Fortuitously, the combination of g-C3N4 nano-sheets with CdS (SCNO@CdS) provides plentiful bi-functional redox sites and displays an excellent synergistic catalytic effect. Furthermore, the superior prosperity with multi-functions to degrade mixed dyes including Photo-Fenton and Photocatalysis reaction, and the maximum production rate of H2O2 is 7971.0 mu mol.h(-1).g(-1) by 40 wt% SCNO@CdS under irradiation. Without adding hydrogen peroxide will broaden the foresight of Photo-Fenton in the future.

Automated summary

Photocatalytic oxidation technology can oxidize organic pollutants into small-molecule inorganic substances by producing radicals, holes, and hydrogen peroxide. Controlling the morphology of semiconductor photocatalysts during formation processes is crucial for enhancing photocatalytic activity. The synergistic contributions of large specific surface area and good optical capability play a key role in superior pollutant degradation during photocatalysis and Photo-Fenton reaction.