Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 267, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.118697
Keywords
Facets coupling; BiOI; g-C3N4; Interfacial charge separation; Photodegradation
Funding
- National Natural Science Foundations of China [51572246, 51672258]
- Fundamental Research Funds for the Central Universities [2652018290]
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Heterojunction photocatalyst fabrication benefits the improvement of photocatalytic activity. However, the influence of different coupling facets receives less attention. Herein, two p-n junctions with different coupling facets of BiOI, denoted as B001/CN002 and B110/CN002(+), were constructed by a simple precipitation method. In B001/CN002, BiOI nanosheets parallel combined with g-C3N4 with the {001} facet of BiOI and (002) plane of g-C3N4. After being treated by CTAB, the (002) plane of g-C3N4 shows positive charge (g-C3N4+), and the BiOI nanosheets were vertically assembled onto g-C3N4+. The results of photodegradation on multiform industrial contaminants and antibiotic revealed that B001/CN002 shows much higher photoactivity than g-C 3 N. 4 , g-C3N4+, BiOI and B110/CN002(+). The substantially facilitated charge separation and transfer at the interface of B001/ CN002 promote the generation of O-1(2) and center dot O-2(-), accounting for the excellent photocatalytic activity. The study may provide a new perspective on designing heterostructured photocatalytic materials via facet-charge-induced interfacial engineering strategy.
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