Abstract
Heterojunction engineering has shown great potential in the field of photocatalysis to deal with environmental pollutants. The design and synthesis of heterojunction photocatalysts with high efficiency and stability still face great challenges. In this work, a novel CdS quantum dots (QDs) decorated 3D Bi2O2CO3 hierarchical nanoflower heterojunction photocatalyst (Bi2O2CO3/CdS QDs) was synthesized to investigate the photocatalytic Rhodamine B (RhB) degradation performance. CdS QDs were evenly distributed on the surface of the Bi2O2CO3 nanoflower. Bi2O2CO3/CdS QDs showed significantly enhanced photocatalytic RhB degradation performance compared with pristine Bi2O2CO3 and CdS QDs. The enhanced photocatalytic performance was attributed to the synergistic effect of hierarchical structure and heterojunction, which greatly increased the active sites of the reaction and the photogenerated carriers transfer.
Highlights
As a green technology, photocatalysis has great potential in dealing with environmental pollution and the energy crisis
The enhanced photocatalytic performance was attributed to the synergistic effect of hierarchical structure and heterojunction, which greatly increased the active sites of the reaction and the photogenerated carriers transfer
CdS quantum dots (QDs) are uniformly dispersed on the surface of Bi2 O2 CO3 hierarchical nanoflower to form the heterojunction
Summary
Photocatalysis has great potential in dealing with environmental pollution and the energy crisis. Heterojunction engineering can effectively improve the photocatalytic performance of composite photocatalysts, and accelerate the transport of photocarriers in the photocatalytic process [9,10,11]. Huang et al [12] successfully prepared a novel 3D WO3-x /Bi/BiOCl hierarchical heterostructure to investigate the drastically enhanced photocatalytic degradation performance for RhB. They attributed the enhanced photocatalytic activity to the formed heterojunction structure and improved light-harvesting ability by 3D WO3-x. Zhang et al [13] fabricated a 3D Bi2 MoO6 /ZnO hierarchical heterostructured photocatalyst to explore the enhanced photocatalytic reduction performance for.
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