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Updated: Mar 14, 2026

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
Published on: October 5, 2019
Carbon dot and BiVO4 quantum dot composites for overall water splitting via a two-electron pathway
Xiuqin Wu1, Juan Zhao1, Sijie Guo1
1Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, China. hhuang0618@suda.edu.cn yangl@suda.edu.cn zhkang@suda.edu.cn.
Abstract:
Carbon dot and BiVO4 quantum dot composites (CDs/BiVO4 QDs) show a significantly improved photocatalytic activity and high stability for overall water splitting. By using 5% CDs/BiVO4 QDs as photocatalysts, the H2 evolution of 0.92 μmol h-1, was achieved under solar light irradiation without any cocatalysts or sacrificial reagents, which is about 4 times that of BiVO4 QDs (0.21 μmol h-1). Note that, for the CD/BiVO4 QD catalyst, the produced H2 and O2 are approximately equal to the stoichiometric ratio (H2 : O2 = 1.80 : 1), while that of BiVO4 QDs is nonstoichiometric (about only 0.06 : 1). In addition, the present water splitting occurs via a two-electron pathway and CDs and BiVO4 QDs served as the reduction and oxidation reaction active sites, respectively.
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