Composite of acicular rod-like ZnO nanoparticles and semiconducting polypyrrole photoactive under visible light irradiation for methylene blue dye photodegradation
- 423 Downloads
Nanoparticles of zinc oxide (ZnO) with acicular rod-like morphology were synthesized using a bicontinuous microemulsion and coated with polypyrrole (PPy), by polymerization in the presence of dioctyl sodium sulfosuccinate (AOT) surfactant with ammonium persulfate as oxidizing agent to obtain nanocomposites of ZnO/PPy. The resulting material was characterized by FTIR, Raman spectroscopy, and scanning electron microscopy. The synthesized nanocomposite consisted of ZnO nanoparticles immersed in a polypyrrole matrix with a conductivity of 6.4 × 10−6 S/cm. The synthesized nanocomposite was tested in the photodegradation of methylene blue (MB) dye under visible light irradiation resulting in photodegradation efficiency of 95.2 % after 60 min of irradiation using 3.6 g/L of nanocomposite in an aqueous solution of MB at 20 mg/L. Pseudo first-order kinetics were used to describe the photodegradation reactions.
KeywordsZnO/polypyrrole Nanocomposites Photocatalyst Visible light
B.E. Castillo-Reyes acknowledges the scholarship from CONACYT (229857). V.M.O.M. wants to thank the Consejo Nacional de Ciencia y Tecnología—México by Grant # SEP-80843. V.M.O.M. thanks the hospitality of Dr. Farías-Cepeda at the sabbatical leave in Facultad de Ciencias Químicas, Universidad Autónoma de Coahuila.
- 5.Barkade SS, Pinjari DV, Singh AK, Gogate PR, Naik JB, Sonawane SH, Ashokkumar M, Pandit AB (2013) Ultrasound assisted miniemulsion polymerization for preparation of polypyrrole–zinc oxide (PPy/ZnO) functional latex for liquefied petroleum gas sensing. Ind Eng Chem Res 52:7704–7712. doi: https://doi.org/10.1021/ie301698g CrossRefGoogle Scholar
- 9.Lin L, Wu Q (2012) Well-aligned ZnO nanotube/polyaniline photocatalysts for enhanced photocatalytic performances. Polym Polym Compos 20:367–376Google Scholar
- 17.Ovando-Medina VM, Peralta RD, Mendizábal E, Martínez-Gutiérrez H, Lara-Ceniceros T, Ledezma-Rodríguez R (2011) Synthesis of polypyrrole nanoparticles by oil-in-water microemulsion polymerization with narrow size distribution. Colloid Polym Sci 289:759–765. doi: https://doi.org/10.1007/s00396-011-2394-z CrossRefGoogle Scholar
- 19.Ovando-Medina VM, Diaz-Flores PE, Martínez-Gutiérrez H, Moreno-Ruiz LA, Antonio-Carmona ID, Hernández-Ordoñez M (2014) Composite of cellulosic agricultural waste coated with semiconducting polypyrrole as potential dye remover. Polym Compos 35:186–193. doi: https://doi.org/10.1002/pc.22649 CrossRefGoogle Scholar