TY - JOUR
T1 - High performance of Ag/BiVO4 photocatalyst for 2,4-Dichlorophenoxyacetic acid degradation under visible light
AU - Sánchez, Orlando A.
AU - Rodríguez, Julia L.
AU - Barrera-Andrade, José M.
AU - Borja-Urby, Raúl
AU - Valenzuela, Miguel A.
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/6/25
Y1 - 2020/6/25
N2 - With the aim of exploring and comparing the photocatalytic degradation of 2,4-Dichlorophenoxyacetic acid (2,4-D) under visible light, BiVO4 was synthesized by using coprecipitation and hydrothermal methods and modified with silver nanoparticles (AgNP) employing a photo-deposition method. X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy were some of the characterization techniques used. A particular synergy was observed when decorating the hydrothermally prepared BiVO4 with AgNP, showing the higher degradation/mineralization of 2,4-D. According to the results, AgNP served as efficient co-catalysts of BiVO4, allowing the electron separation/transfer to generate the OH radicals required for the reaction. A parallel pathway of 2,4-D photodegradation was proposed, including 2,4-Dichlorophenol and oxalic acid as the main intermediary compounds. Active species trapping experiments demonstrated that the photogenerated holes play a fundamental role in promoting both the direct oxidation of 2,4-D and generation of OH radicals.
AB - With the aim of exploring and comparing the photocatalytic degradation of 2,4-Dichlorophenoxyacetic acid (2,4-D) under visible light, BiVO4 was synthesized by using coprecipitation and hydrothermal methods and modified with silver nanoparticles (AgNP) employing a photo-deposition method. X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy were some of the characterization techniques used. A particular synergy was observed when decorating the hydrothermally prepared BiVO4 with AgNP, showing the higher degradation/mineralization of 2,4-D. According to the results, AgNP served as efficient co-catalysts of BiVO4, allowing the electron separation/transfer to generate the OH radicals required for the reaction. A parallel pathway of 2,4-D photodegradation was proposed, including 2,4-Dichlorophenol and oxalic acid as the main intermediary compounds. Active species trapping experiments demonstrated that the photogenerated holes play a fundamental role in promoting both the direct oxidation of 2,4-D and generation of OH radicals.
KW - 2,4-D degradation
KW - Bismuth vanadate
KW - Composites Ag/BiVO
KW - Photocatalysis
KW - Visible light
UR - http://www.scopus.com/inward/record.url?scp=85085302014&partnerID=8YFLogxK
U2 - 10.1016/j.apcata.2020.117625
DO - 10.1016/j.apcata.2020.117625
M3 - Artículo
SN - 0926-860X
VL - 600
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
M1 - 117625
ER -