Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 221, Issue -, Pages 215-222Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2017.09.028
Keywords
Bi2WO6; CuInS2; Photocatalysis; Toluene oxidation; Cr(VI) reduction
Funding
- National Natural Science Foundation of China [21507029, 21501138]
- Natural Science Foundation of Hubei Province [2015CFB177]
- Nature Science Foundation of Hebei Province [B2016502063]
- China Ministry of Education
- Fundamental Research Funds for the Central Universities [2016MS109]
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Novel CuInS2 quantum dots (CIS-QDs)/Bi2WO6 3D composites were successfully synthesized through a facile deposition process, followed by low temperature calcination. The ternary p-type CIS-QDs were highly dispersed onto the surface of flower-like n-type Bi2WO6 nanosheets to form p-n heterojunction and simultaneously tune the behaviors of photogenerated charge carriers, resulting in higher photocatalytic efficiencies of toluene degradation and Cr(VI) reduction under visible light irradiation, which are 3.0 and 8.5 times higher than those of Bi2WO6, respectively. The photoelectrochemical investigations indicate that the introduction of CIS-QDs synergistically enhanced the harvesting efficiency of solar energy in the p-n heterojunction system with the internal electric field and reduced transfer barrier of photoinduced charge carriers by forming the unique Bi-S bonds between the CIS-QDs and flower-like Bi2WO6.
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