TY - JOUR
T1 - Synthesis and characterization of n-ZnO/p-MnO nanocomposites for the photocatalytic degradation of anthracene
AU - Martínez-Vargas, Blanca L.
AU - Cruz-Ramírez, Marisela
AU - Díaz-Real, Jesús A.
AU - Rodríguez-López, J. L.
AU - Bacame-Valenzuela, Francisco Javier
AU - Ortega-Borges, Raúl
AU - Reyes-Vidal, Yolanda
AU - Ortiz-Frade, Luis
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/1/15
Y1 - 2019/1/15
N2 - n-ZnO/p-MnO nanocomposites with different percentages of manganese (0.5%, 1.1%, and 2.25%) with a semiconducting junction were prepared. Changes in Flat band potential (Efb) for ZnO due the different amounts of MnO was observed, meanwhile same donor density (Nd) was held in all materials. From chronoamperometric experiments under on-off illuminated conditions a transient time constant (τ), related to the electron transport in the electrodes were calculated, where higher values are observed in materials with high amounts of MnO. Photodegradation studies of anthracene in an ethanol:water (1:1, pH 12) solution were performed, showing that anthraquinone is the main product with no photodegrading of ethanol. The results suggest that the junction n-ZnO/p-MnO and materials with high transient time constant (τ), enhance the photocatalytic degradation. The best photocatalytic performance for the photodegradation of anthracene was obtained with the nanocomposite n-ZnO /p-MnO(Mn=2.25%).
AB - n-ZnO/p-MnO nanocomposites with different percentages of manganese (0.5%, 1.1%, and 2.25%) with a semiconducting junction were prepared. Changes in Flat band potential (Efb) for ZnO due the different amounts of MnO was observed, meanwhile same donor density (Nd) was held in all materials. From chronoamperometric experiments under on-off illuminated conditions a transient time constant (τ), related to the electron transport in the electrodes were calculated, where higher values are observed in materials with high amounts of MnO. Photodegradation studies of anthracene in an ethanol:water (1:1, pH 12) solution were performed, showing that anthraquinone is the main product with no photodegrading of ethanol. The results suggest that the junction n-ZnO/p-MnO and materials with high transient time constant (τ), enhance the photocatalytic degradation. The best photocatalytic performance for the photodegradation of anthracene was obtained with the nanocomposite n-ZnO /p-MnO(Mn=2.25%).
KW - Electrochemistry
KW - Nanocomposite
KW - PAHs photocatalytic activity
KW - n-ZnO/p-MnO
UR - http://www.scopus.com/inward/record.url?scp=85054831902&partnerID=8YFLogxK
U2 - 10.1016/j.jphotochem.2018.10.010
DO - 10.1016/j.jphotochem.2018.10.010
M3 - Artículo
AN - SCOPUS:85054831902
SN - 1010-6030
VL - 369
SP - 85
EP - 96
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
ER -