期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 10, 期 2, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2022.107332
关键词
Bismuth oxybromide; Reduced graphene oxide; Zinc tetracarboxyphthalocyanine; Heterostructured photocatalyst; Photodegradation
资金
- European Union
- Centre-Val de Loire Region (FEDER)
The heterostructured photocatalyst BiOBr/rGO/ZnPc(CO2H)(4)(0.25) exhibits superior photocatalytic activity due to enhanced visible light absorption and charge carrier separation. Superoxide radicals and holes are found to be the main active species involved in the degradation of Orange II dye and phenol. The catalyst shows high stability and holds great potential for environmental remediation.
The preparation of heterostructured photocatalysts associating BiOBr, reduced graphene oxide (rGO) and zinc tetracarboxyphthalocyanine (ZnPc(CO2H)(4)) and their performance for the degradation of the Orange II dye and of phenol are reported. The BiOBr/rGO/ZnPc(CO2H)(4)(0.25) photocatalyst displays a superior activity than BiOBr and BiOBr/rGO, indicating that ZnPc(CO2H)(4) enhances both the visible light absorption and the charge carrier separation, which is confirmed by photoluminescence, photocurrent responses and electrochemical impedance spectroscopy Nyquist plots. Scavenging experiments show that the main active species involved in the degradation of Orange II and phenol are superoxide radicals and holes and a mechanism is proposed. Due to its high stability, the BiOBr/rGO/ZnPc(CO2H)(4)(0.25) catalyst shows high potential for real environmental remediation.
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