Affiliation:
1. School of Chemistry & Environmental Engineering Changchun University of Science and Technology Changchun China
Abstract
ABSTRACTThe micro‐morphology of photocatalytic materials has a great influence on their photocatalytic performance. Quantum dots can provide the plasmon resonance effect and broaden the wavelength range of light absorption. In this study, a kind of 3D spherical flower‐like structure was constructed by self‐assembly of 2D nanosheets, the Bi2S3 particles with 5 ± 1 nm diameter were modified on the surfaces of Bi2O2CO3 nanosheets to prepare the Bi2S3/Bi2O2CO3 composite. The energy level difference (0.45 eV) between the conduction bands (CB) of Bi2S3 and Bi2O2CO3 led to which the e− was transferred to CB of Bi2O2CO3. The energy level difference (0.83 eV) between the CB of Bi2O2CO3 and the valence band (VB) of Bi2S3 was much smaller than the band gap (1.28 eV) of Bi2S3, and it led to which the electrons on the CB of Bi2O2CO3 were recombined with the holes on the VB of Bi2S3. A kind of innovative type heterojunction was constructed between Bi2S3 and Bi2O2CO3, which encouraged the photogenerated h+ and ·OH to be located on the VB of Bi2O2CO3 with the strongest oxidation potential, the prepared material showed excellent performance for the photodegradation of RhB, and the active groups were also controlled in the photocatalysis process.