Publication:
Hydrocalumite-TiO2 hybrid systems synthesized from aluminum salt cake for photodegradation of ibuprofen

Consultable a partir de

Date

2024

Authors

Rebollo, Beatriz
Jiménez, Alejandro
Trujillano, Raquel
Rives, Vicente
Vicente, Miguel Ángel

Director

Publisher

Elsevier
Acceso abierto / Sarbide irekia
Artículo / Artikulua
Versión publicada / Argitaratu den bertsioa

Project identifier

AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-112656RB-C21/ES/recolecta

Abstract

Synthesis of hydrocalumite–TiO2 hybrid systems and their use in photodegradation of ibuprofen is reported for the first time. Hydrocalumite was prepared with Al3+ recovered from an aluminum slag (circular economy), TiO2 was deposited on hydrocalumite by hydrolysis of titanium(IV) isopropoxide, and the solids thus obtained were calcined at 400 and 750 ºC. The solid calcined at 400 ºC was essentially amorphous, showing the presence of calcite due to the fixation of atmospheric CO2, while the solid calcined at 750 ºC was composed of mayenite, perovskite and rutile. The calcined solids were used for catalytic degradation of ibuprofen (50 ppm in aqueous solutions) under UV irradiation, obtaining better results than when using commercial TiO2–P25 from Degussa. Under the specific conditions used, the degradation took place in the initial steps of the process, mainly giving rise to species with higher molecular mass than initial ibuprofen.

Keywords

CaAl–LDH, Hydrocalumite, Hydrocalumite–TiO2 composites, Aluminum salt cake recovery, Ibuprofen photodegradation

Department

Ciencias / Zientziak / Institute for Advanced Materials and Mathematics - INAMAT2

Faculty/School

Degree

Doctorate program

Editor version

Funding entities

This research was funded by Universidad de Salamanca (Plan I–B2). AJ thanks Universidad de Salamanca and Banco Santander for a predoctoral contract. AG is grateful for financial support from the Spanish Ministry of Science and Innovation (AEI/MINECO) through project PID2020–112656RB–C21.

© 2024 The Author(s). This is an open access article under the CC BY-NC-ND license

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