TY - JOUR
T1 - Removal and surface photocatalytic degradation of methylene blue on carbon nanostructures
AU - Ramírez-Aparicio, Jeannete
AU - Samaniego-Benítez, José Enrique
AU - Murillo-Tovar, Mario Alfonso
AU - Benítez-Benítez, José Luis
AU - Muñoz-Sandoval, Emilio
AU - García-Betancourt, María Luisa
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/11
Y1 - 2021/11
N2 - Removal and photodegradation of methylene blue on the surface of three distinct carbonaceous materials, pure and nitrogen-doped multi-walled carbon nanotubes, and graphitic nanoribbons, were examined. Carbon nanostructures were characterized by scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, Raman spectroscopy, X-ray photoelectron spectroscopy, and N2 adsorption/desorption isotherms. Removal and photocatalytic activity were evaluated by static adsorption under UV irradiation. Photocatalytic activity on carbon nanostructure exhibited a pseudo-first-order kinetic model. The adsorption capacity and photocatalytic activity of carbon nanostructures were mainly attributed to their defective and reactive surface. Nitrogen-doped multi-walled carbon nanotubes showed the best adsorption capacity and photocatalytic activity, which can be attributed to the highly reactive sites due to nitrogen doping, also by π–π electron donor-acceptor interaction between sp2 lattice of carbon nanostructure surface and negatively charged sites at methylene blue molecules.
AB - Removal and photodegradation of methylene blue on the surface of three distinct carbonaceous materials, pure and nitrogen-doped multi-walled carbon nanotubes, and graphitic nanoribbons, were examined. Carbon nanostructures were characterized by scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, Raman spectroscopy, X-ray photoelectron spectroscopy, and N2 adsorption/desorption isotherms. Removal and photocatalytic activity were evaluated by static adsorption under UV irradiation. Photocatalytic activity on carbon nanostructure exhibited a pseudo-first-order kinetic model. The adsorption capacity and photocatalytic activity of carbon nanostructures were mainly attributed to their defective and reactive surface. Nitrogen-doped multi-walled carbon nanotubes showed the best adsorption capacity and photocatalytic activity, which can be attributed to the highly reactive sites due to nitrogen doping, also by π–π electron donor-acceptor interaction between sp2 lattice of carbon nanostructure surface and negatively charged sites at methylene blue molecules.
KW - Adsorption
KW - Carbon nanotubes
KW - Methylene blue
KW - Nanoribbons
KW - Photocatalysis
KW - Removal
UR - http://www.scopus.com/inward/record.url?scp=85112387945&partnerID=8YFLogxK
U2 - 10.1016/j.diamond.2021.108544
DO - 10.1016/j.diamond.2021.108544
M3 - Artículo
AN - SCOPUS:85112387945
SN - 0925-9635
VL - 119
JO - Diamond and Related Materials
JF - Diamond and Related Materials
M1 - 108544
ER -