Abstracts Book - IMRC 2018

• SF3-O028
PHOTO-DEGRADATION OF AZO DYE REACTIVE BLACK 5 IN THE
PRESENCE OF MICROPOROUS MATERIALS LIKE NATURAL
ZEOLITES
Jose Manuel Sanchez 1 , Estela Márquez Ramírez 2 , Gregorio Zacahua Tlacuatl 3 , Fernando Chavez
Rivas 1 , Vitalii Petranovskii 4
1 Escuela Superior de Física y Matemáticas IPN, Fisica, Mexico. 2 Instituto Politecnico Nacional,
IPN - SEPI-ESIME-Zacatenco, Mecanica, Mexico. 3 Instituto Politécnico Nacional - IPN - ESIQIE,
Ingenieria Quimica, Mexico. 4 Centro de Nanociencias y Nanotecnología CNyN-UNAM,
Nanocatálisis, Mexico.
In the present work, natural zeolites thermally modified and milled were used
to carry out an oxidation-reduction reaction of organic textile dye called Reactive
Black 5 (RB5) further, X-ray, UV-Vis and atomic absorption results are reported.
X-ray diffraction was seen the presence of not zeolitic and zeolitic phases, such
as clinoptilolite, mordenite and α-quartz; with increasing of calcination
temperature there is a proportional dependence on the increment amorphous
phase and the reduction of crystal phase. In addition, some slight changes in the
position of the peaks were observed, this can be related to both dealumination
and the partial breakdown of the zeolite framework, producing a disturbance in
the volume of unit cell, due to the dehydration/hydration processes. Absorpion
Atomic Spectroscopy shows the presence of Si (55 %wt), Al (13 %wt), Fe (2 %wt),
K (3 % wt), Na (2 %wt), Mg (2 % wt) and Ca (2 %wt); the Si/Al molar ratios it find
between 4 to 4.3, which correspond to clinoptilolite phase, this confirms the X-
ray analysis. On the other hand, zeolites were tested in a photo-catalytic reaction
for the degradation of (RB5), UV-Vis spectroscopy was used to monitor the
reaction by measuring the changes in the intensity of the absorption peaks at
595 and 310 nm. The diminution of absorbance peaks of UV-Vis spectra confirms
the destruction of the organic dye molecules, suggesting that the thermal
treatment applied on the zeolitic samples has an important effect on its catalytic
properties.
Acknowledgment:
This work has been supported by COFAA-IPN, BEIFI-IPN and CONACYT (México).
Thanks are given to Dr. J. A. Andraca-Adame (CNyMN-IPN), Dr. I. Hernandez-
Perez (UAM-Azcapotzalco) and Ch. M. C. Ortiz-Trejo(ESIQIE-IPN )for the technical
support.