Abstracts Book - IMRC 2018

• SF5-P021
SYNTHESIS OF LaFeO3 VIA CO-PRECIPITACIÓN FOR ITS
PHOTOCATALYTIC EVALUATION IN THE DEGRADATION OF
EMERGING CONTAMINANTS
Daniel Sánchez Martínez 1 , Rodrigo Vázquez Velázquez 1 , Diana Berenice Hernandez Uresti 2 ,
Alexis Ruiz Garcia 1
1 Universidad Autónoma de Nuevo León, Facultad de Ingeniería Civil, Departamento de
Ecomateriales y Energía, Mexico. 2 Universidad Autónoma de Nuevo León, Facultad de Ciencias
Fisico Matematicas, Mexico.
LaFeO 3 was synthesized by co-precipitation method at 800°C during 12 h [1].
Also with comparative purposes was synthesized the LaFeO 3 by solid state
method [2]. The LaFeO 3 samples were characterized by X-ray Diffraction
powders (XRD), presenting an orthorhombic crystalline structure (JCPDS Card
No. 01-074-2203). The characterization was complemented by scanning electron
microscopy (SEM) to determine the morphology of the samples; obtained by
solid state reaction an irregular morphology and by co-precipitation a flakes
morphology with particles smaller. The value of band gap energy (Eg) was
determinate by diffuse reflectance spectroscopy (DRS). The Eg calculated of
LaFeO 3 synthesized for both methods was around 2.1 eV, which it is similar the
value reported in literature [3]. The surface area was determinate by N 2
physisorption (BET method) using an equipment BELSORP mini II JAPAN. The
photocatalytic activity of the LaFeO 3 samples were evaluated in the degradation
reactions of two emerging pollutants: Tetracycline (TC) and Ciprofloxacin (CP)
under irradiation of simulated sunlight. The sample obtained by co-precipitation
presented the best photocatalytic activity. To determine the oxidizing species
that participate during the degradation of the emerging contaminants were
added scavengers as: isopropanol, KI, benzoquinone and catalase. The
mineralization of the contaminants was monitored by carbon organic total (TOC)
analysis using as photocatalyst the sample that presented the best activity;
achieving a partial mineralization of the organic pollutants.
Acknowledgment:
The authors wish to thank to the Universidad Autónoma de Nuevo León (UANL)
for its invaluable support; CONACYT, for support of Project CB- 2013-01 Clave:
220802, Problemas Nacionales PN-2015-01-610; SEP, for support of project PFCE
2017-2018 Apoyo al CA-UANL-244 and REDES TEMÁTICAS 2015-CA-UANL-244.