Abstract
Photocatalytic production of hydrogen peroxide (H2O2) with water and oxygen as clean source is considered to be a sustainable strategy. Resorcinol‐formaldehyde (RF) resin has attracted much attention as a promising polymeric photocatalyst, but the inefficient charge transfer restricts its corresponding photocatalytic efficiency. Herein, the design and synthesis of graphene quantum dots (GQDs) modified RF (RF‐GQDs) composite via freeze‐drying method are reported. The improvment of the RF‐GQDs composite charge separation efficiency is achieved through the combination electrostatic interaction between GQDs and RF, thus greatly enhancing photocatalytic performance. The optimal RF‐GQDs display the best photocatalytic H2O2 production activity of 2.45 mmol h−1 g−1, which is 5.1 times that of bare RF (0.48 mmol h−1 g−1). This work might contribute to a new way for the development of RF‐based ploymeric photocatalysts for efficient photocatalytic H2O2 production.
Resorcinol‐formaldehyde graphene quantum dots (RF‐GQDs) composites are prepared by a freeze‐drying method. Due to the photosensitizer and electron acceptor characteristics of GQDs, the light absorption and charge separation capabilities of the composite materials are greatly improved. The photocatalytic H2O2 rate of RF‐GQDs‐0.4 reaches 2.45 mmol h−1 g−1, which is 5.1 times of RF (0.48 mmol h−1 g−1).