Synergistic sulfur doping and nitrogen vacancies in porous graphite carbon nitride for enhanced photocatalytic H2O2 production

The oxygen adsorption ability of the photocatalyst is essential for photocatalytic production of H2O2, whereas the investigation of influence of oxygen adsorption ability on the photocatalytic H2O2 production seems to be overlooked in most studies. Herein a facile ammonium persulfate assisted hydrothermal method is developed to synthesize porous and fluffy graphite carbon nitride (CN) with sulfur doping and nitrogen vacancies. The introduction of sulfur doping and nitrogen vacancies in combination of high surface area is found to be beneficial to improve the oxygen adsorption ability, which results in the increased H2O2 yield of 293.2 μM within 4 h compared to the pristine CN (123.2 μM). The developed strategy provides new insight for the design of highly efficient photocatalysts in a facile way.