Abstract
Heat treatment strategy has been initially used to prepare boron doped graphite carbon nitride nanodots (BCNDs)/carbon-rich g-C_3N_4 nanosheets (CNS) heterojunction catalysts. The overall procedure involved three stages. First, BCNDs were prepared by the molten salt method. Next, BCNDs were dispersed onto CNS via heat treatment. Finally, the prepared heterojunction catalysts were test for photocatalytic water splitting hydrogen evolution. The experiment results show that the highest photocatalytic hydrogen evolution activity reached 6260.5 umol-g~(-1)-h~(-1) which was approximately 15.7, 7.2 and 3.1 folds higher than that of bulk carbon nitride (bulk C_3N_4), CNS and BCNDs/CNS-H prepared by hydrothermal method, respectively. The enhanced photocatalytic performance may be attributed to the synergistic effect of the formation of heterojunction and the increase of C content in carbon nitride. This work provides reliable guideline for the design of a novel and simple method for composite photocatalyst.
NSTL
Elsevier