Abstract
We demonstrate the sustainable production of H2O2 without organic electron donors by a CdS-reduced graphene oxide (RGO) photocatalyst in sunlight with water and oxygen as resources. Photocatalysts were prepared with various amounts of RGO (0–30wt.% with respect to CdS) by a hydrothermal method. A photocatalyst containing 20wt.% RGO (CdS-G2) showed maximum activity, and the amount of H2O2 produced (128μM) was almost five times higher than that produced by CdS nanoparticles (27μM) after 12h sunlight irradiation. The results clearly revealed that the photocatalytic reactionmainly proceeds by two-electron reduction of oxygenrather than water oxidation on the catalyst surface. The effects of reaction temperature and pH on the production of H2O2 were also investigated. We found that the production of H2O2was enhanced at lower temperature and pH. The concentration of H2O2 reachedto 164 and 156μM with CdS-G2 at 10°C and pH 2, respectively.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
