Hydrazine modified g-C3N4 with enhanced photocatalytic activity for degradation of indigo carmine
Por:
Valencia, G. Karen, Hernandez-Gordillo, Agileo, Mendez-Galvan, Melissa, Morett, Diego, Rodil, Sandra E.
Publicada:
1 nov 2022
Resumen:
Polymeric graphitic carbon nitride (g-C3N4) was obtained from urea and
modified by heat polymerization at 550. C in the presence of hydrazine
as a modifier agent. The influence of in-situ generated NH3 by hydrazine
decomposition at different contents (0.5, 1, 1.5, and 2 mL) on the
physicochemical properties and surface properties (water contact angle
and point of zero charge) of the g-C3N4 were investigated. The modified
g-C3N4 were analyzed by X-ray diffraction, scanning electron microscopy,
diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy,
photoluminescence, Fourier Transform Infrared, water contact angle,
surface area, and the point of zero charge. The in-situ generated NH3
induced an evolution from nano-flakes to lamellar plate morphology
depending on stacked interplanar. The influence of surface properties on
the photocatalytic response of the unmodified and modified g-C3N4 was
tested in the photodegradation of indigo carmine dye at pH = 3.5 and 6.5
solutions under blue LEDs light. The photostability of the samples was
tested after 4 cycles of reaction. The properties (surface area (SA);
water contact angle (WCA), and optical gap) influence the photocatalytic
response, which was summarized in a single parameter defined as
SA/(WCA*gap). The maximum value of this product match with results
obtained for the most active photocatalyst (U-Hz1).
Filiaciones:
Valencia, G. Karen:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior SN,Ciudad Univ, Coyoacan 04510, Mexico
Hernandez-Gordillo, Agileo:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior SN,Ciudad Univ, Coyoacan 04510, Mexico
Mendez-Galvan, Melissa:
Univ Nacl Autonoma Mexico, Dept Fis Quim, Inst Fis, Ciudad Univ, Coyoacan 04510, Mexico
Morett, Diego:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior SN,Ciudad Univ, Coyoacan 04510, Mexico
Rodil, Sandra E.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior SN,Ciudad Univ, Coyoacan 04510, Mexico
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