Journal
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Volume 277, Issue -, Pages -Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2020.111399
Keywords
Photocatalyst; Layered double hydroxides; Phenol; Photodegradation; Sulfate radicals
Categories
Funding
- SIP project (IPN) [20201373, 20200352, 20200505]
- CONACyT [CB - 285711]
- BEIFI (IPN)
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Functionalized ZnAl layered double hydroxide photocatalyst was synthesized by the addition of sodium dodecyl sulfate during coprecipitation and subsequent calcination, leading to improved degradation and mineralization of phenol under UV light irradiation, attributed to the presence of sulfate radicals as confirmed by EPR study.
Functionalized ZnAl layered double hydroxide based photocatalyst was obtained by the addition of sodium dodecyl sulfate (SDS) during the synthesis by the coprecipitation method, and further calcination at 400 degrees C. Bare and modified materials were characterized by X-ray diffraction, nitrogen adsorption-desorption, IR, UV-Vis, EPR and XPS spectroscopies, SEM and HRTEM. The synthesized material was evaluated in the photodegradation of phenol in a 40 ppm aqueous solution (4.25 x 10(-4) mol of phenol/L), under UV light irradiation. An increasing in the degradation of phenol from 62 to 95%, and from 62 to 82% in the mineralization of phenol was obtained using SDS functionalized ZnAl LDH, in comparison with the unmodified material. This increase could be attributed to the presence of sulfate radicals, confirmed by the EPR study.
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