Fig. 4: Photocatalytic properties of the catalysts.
From: A metal-free cascaded process for efficient H2O2 photoproduction using conjugated carbonyl sites
a Photocatalytic H2O2 evolution activity of EA-200, EA-240, EA-260, EA-350, and EA-400; The H2O2 production rates of EA-200 and EA-400 are both zero, and the performance curves of the two samples overlap. b Photocatalytic H2O2 evolution cycles of the EA-260. c AQE versus the UV-vis absorption spectrum of EA-260. Error bars represent the standard deviations of three replicate measurements in a–c. d In situ EPR spectra of the EA-260 photocatalytic system in the dark and after 30 min of visible light irradiation. DMPO-·OH: The test is performed in 200 μL of 1 mg/mL of the EA-260 in H2O, with the addition of 200 μL of DMPO solution at a concentration of 100 mM for ·OH capture. DMPO-·O2−: The test was performed in 200 μL of 1 mg/mL EA-260 in methanol, with the addition of 200 μL of DMPO solution at a concentration of 100 mM for ·O2− capture. Exact data of photocatalytic performance is provided in the source data.
