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Title

Cascade charge separation mechanism by ternary heterostructured BiPO4/TiO2/g-C3N4 photocatalyst

AuthorsObregón, Sergio ; Zhang, Yunfan; Colón, Gerardo
KeywordsHeterojunction
Photocatalytic activity
Phenol
BiPO4
TiO2
gC3N4
Issue Date5-May-2016
PublisherElsevier
CitationApplied Catalysis B - Environmental 184: 96-103 (2016)
AbstractA complex ternary BiPO/TiO/gCN heterostructure has been obtained from a simple impregnation method having good photoactivities for the degradation of phenol under solar-like irradiation. From the wide structural, surface and electronic characterization, we have stated that the formation of the ternary heterojunction notably affect photoactivity of pristine TiO. Thus, the best result for the binary system was obtained for 70wt% TiO-30wt% BiPO system. The incorporation of gCN leads to a further improvement on the photocatalytic activity when it is specifically done over TiO. By means of photoluminescence spectroscopy and reactive oxygen species formation test, we propose that the effective charge carrier separation is taking place through a cascade-driven electronic mechanism. Therefore, by choosing the adequate band-engineering tailoring an important improved photoactivity can be achieved.
Publisher version (URL)https://doi.org/10.1016/j.apcatb.2015.11.027
URIhttp://hdl.handle.net/10261/190781
DOI10.1016/j.apcatb.2015.11.027
ISSN0926-3373
Appears in Collections:(ICMS) Artículos
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