TY - JOUR
T1 - Cu2O cubic and polyhedral structures versus commercial powder: Shape effect on photocatalytic activity under visible light
T2 - Shape effect on photocatalytic activity under visible light
AU - Plascencia-Hernández, Fernando
AU - Luna, Ana L.
AU - Colbeau-Justin, Christophe
AU - Santiago, Patricia
AU - Garcia-Rocha, Miguel
AU - Valverde-Aguilar, Guadalupe
AU - Valenzuela, Miguel A.
N1 - Publisher Copyright:
© 2019
PY - 2019/12
Y1 - 2019/12
N2 - A simple precipitation-reduction method was used to prepare cubic and polyhedral Cu2O structures. Their morphological, structural, optical and electronic properties were analyzed and compared with those of commercial Cu2O by means of SEM, TEM, XRD, UV–vis DRS, Photoluminescence Spectroscopy and Time Resolved Microwave Conductivity. Methyl orange (MO) photodegradation with visible light (blue-light LEDs, λ = 450–470 nm) was taken as a model reaction to study the photocatalytic activity. According to the results, Cu2O edge-and corner-truncated polyhedral particles significantly decreased the MO initial concentration by adsorption and photocatalysis, whereas, Cu2O cubic particles did not show MO adsorption but slightly higher photocatalytic activity than the polyhedral particles. Commercial Cu2O showed MO adsorption and high electron mobility but it was completely inactive. These results were explained in terms of the crystalline defects that influence both, the adsorption capacity and the photocatalytic activity.
AB - A simple precipitation-reduction method was used to prepare cubic and polyhedral Cu2O structures. Their morphological, structural, optical and electronic properties were analyzed and compared with those of commercial Cu2O by means of SEM, TEM, XRD, UV–vis DRS, Photoluminescence Spectroscopy and Time Resolved Microwave Conductivity. Methyl orange (MO) photodegradation with visible light (blue-light LEDs, λ = 450–470 nm) was taken as a model reaction to study the photocatalytic activity. According to the results, Cu2O edge-and corner-truncated polyhedral particles significantly decreased the MO initial concentration by adsorption and photocatalysis, whereas, Cu2O cubic particles did not show MO adsorption but slightly higher photocatalytic activity than the polyhedral particles. Commercial Cu2O showed MO adsorption and high electron mobility but it was completely inactive. These results were explained in terms of the crystalline defects that influence both, the adsorption capacity and the photocatalytic activity.
KW - CuO
KW - Morphology
KW - Photocatalysis
KW - Photoluminescence
KW - TRMC
UR - http://www.scopus.com/inward/record.url?scp=85066971472&partnerID=8YFLogxK
U2 - 10.1016/j.jscs.2019.05.007
DO - 10.1016/j.jscs.2019.05.007
M3 - Artículo
SN - 1319-6103
VL - 23
SP - 1016
EP - 1023
JO - Journal of Saudi Chemical Society
JF - Journal of Saudi Chemical Society
IS - 8
ER -